WO2012127594A1 - Appareil de traitement d'informations pour définir un paramètre d'annulation de bruit, et programme pour définir un paramètre d'annulation de bruit - Google Patents

Appareil de traitement d'informations pour définir un paramètre d'annulation de bruit, et programme pour définir un paramètre d'annulation de bruit Download PDF

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Publication number
WO2012127594A1
WO2012127594A1 PCT/JP2011/056664 JP2011056664W WO2012127594A1 WO 2012127594 A1 WO2012127594 A1 WO 2012127594A1 JP 2011056664 W JP2011056664 W JP 2011056664W WO 2012127594 A1 WO2012127594 A1 WO 2012127594A1
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WIPO (PCT)
Prior art keywords
antenna
noise
signal
parameter
information processing
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PCT/JP2011/056664
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English (en)
Japanese (ja)
Inventor
板▲崎▼輝
塩津真一
菅野博靖
田中秀樹
横田耕一
山下大輔
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Fujitsu Ltd
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Fujitsu Ltd
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Priority to JP2013505669A priority Critical patent/JP5686181B2/ja
Priority to PCT/JP2011/056664 priority patent/WO2012127594A1/fr
Publication of WO2012127594A1 publication Critical patent/WO2012127594A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1009—Placing the antenna at a place where the noise level is low and using a noise-free transmission line between the antenna and the receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • H04B1/126—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means having multiple inputs, e.g. auxiliary antenna for receiving interfering signal

Definitions

  • the present invention relates to an information processing apparatus for setting a noise cancellation parameter and a noise cancellation parameter setting program.
  • a wireless communication module for use in wireless LAN, Worldwide Interoperability for Microwave Access (WiMAX), terrestrial digital broadcasting, etc. can be used in various electronic devices such as laptop personal computers, Personal Digital Assistant (PDA), and mobile phones. It has been installed.
  • WiMAX Worldwide Interoperability for Microwave Access
  • PDA Personal Digital Assistant
  • the amplitude and phase of the radio wave noise acquired in the vicinity of the noise generation source are adjusted to generate a signal having an opposite phase.
  • Parameters used for adjusting the amplitude and phase for example, I value and Q value (I / Q value) so as to optimize communication quality information such as signal-to-noise ratio (SN ratio) output from the wireless communication module It was set.
  • the I / Q value is set on the assumption that it will not be changed after shipment, and an optimum I / Q value is obtained and set based on communication quality information in a dedicated measurement environment.
  • the communication quality may be improved if the I / Q value is changed by the user.
  • An object of the present invention is to adjust parameters used for noise cancellation.
  • the information processing apparatus includes a first antenna, a second antenna, a storage unit, a noise cancellation unit, a wireless module, a reception status determination unit, a setting unit, and a parameter change unit.
  • the first antenna receives both or the first signal and noise from the transmitter.
  • the second antenna receives the noise.
  • the storage unit stores a parameter table.
  • the noise cancellation unit adjusts the noise received by the second antenna using a parameter, adds the adjusted noise to the signal received by the first antenna, and is received by the first antenna. Cancel the noise.
  • the wireless module processes the second signal from which the noise has been canceled, and outputs the reception intensity of the second signal.
  • the reception status determination unit determines whether the first signal can be received by the first antenna.
  • the setting unit When it is determined that the first signal is not received by the first antenna, the setting unit obtains the parameter and the reception strength of the third signal from which the noise is canceled using the parameter. Write in the parameter table in association with each other.
  • the parameter changing unit changes the parameter used by the noise canceling unit every time it is written to the parameter table.
  • FIG. 1 is a configuration diagram of an information processing apparatus according to the first embodiment.
  • the information processing apparatus 101 is, for example, a notebook personal computer or a mobile phone.
  • the information processing apparatus 101 includes a communication antenna 102, a noise sampling antenna 103, a large scale integration (LSI) 104, a storage unit 105, a wireless module 106, a reception intensity monitoring unit 107, a table setting unit 108, and an I / Q optimum value calculation.
  • the communication antenna 102 is an antenna that is processed by the wireless module 106 and used to receive signals from other devices.
  • the communication antenna 102 also receives noise generated by the LSI 104 that is a noise source. Note that noise input from the noise source to the communication antenna 102 is called lead-in noise.
  • the noise sampling antenna 103 is an antenna that receives noise generated by the LSI 103.
  • the LSI 104 is an integrated circuit mounted on the information processing apparatus 101.
  • the LSI is a noise source that generates noise. Noise generated in the LSI 104 is input to the communication antenna 102 and the noise sampling antenna 103.
  • the storage unit 105 stores a cancellation effect table 121.
  • the cancellation effect table 121 describes I / Q values, reception intensity information, parameter last update time, and the like, which are parameters used for noise cancellation for each channel.
  • the wireless module 106 receives a signal of the set channel from another device via the communication antenna 201. Also, the wireless module 106 calculates the reception strength of the input signal, and outputs the calculated reception strength to the reception strength monitoring unit 107 as reception strength information.
  • received signal strength indication (RSSI) is used as the received strength.
  • the unit of RSSI is dBm.
  • the reception intensity is not limited to RSSI, and the reception intensity monitoring unit 107 differs depending on the specifications of the wireless module 106, and other values and signals may be output.
  • the reception intensity monitoring unit 107 outputs the reception intensity information input from the wireless module 106 to the table setting unit 108.
  • the table setting unit 108 writes the I / Q value input from the I / Q optimum value calculation unit 109 and the reception intensity information input from the reception intensity monitoring unit 107 to the cancellation effect table.
  • the I / Q optimum value calculation unit 109 sets the I / Q value for each channel used for noise cancellation in the phase amplitude adjustment unit 110. Further, the I / Q optimum value calculation unit 109 sequentially changes the I / Q value and outputs the changed I / Q value to the table setting unit 108. Thereby, an I / Q value optimal for noise cancellation (I / Q optimum value) is calculated.
  • the I / Q optimum value calculation unit 109 reads the I / Q optimum value from the cancellation effect table 121 and sets the I / Q optimum value in the phase amplitude adjustment unit 110.
  • the phase amplitude adjustment unit 110 attenuates the noise signal from the signal received by the communication antenna 102 using the I / Q value set for each channel. Specifically, the phase amplitude adjustment unit 110 adjusts the phase and amplitude of the noise signal sampled by the noise sampling antenna 103 using the I / Q value so as to cancel the noise signal received by the communication antenna 102. Output. As a result, the signal input to the communication antenna 102 and the adjusted noise signal are added, and the noise is attenuated. Note that this attenuation of noise is called noise cancellation. The signal with attenuated noise is input to the wireless module 106.
  • the position determination unit 111 determines the position of the information processing apparatus 101, and outputs the position information to the reception status determination unit 112.
  • the reception status determination unit 112 determines, based on the input position information, the reception status of the signal of the predetermined channel, that is, whether the signal of the predetermined channel can be received by the communication antenna 102, and the determined reception status Is output to the I / Q optimum value calculation unit 109 and the reception intensity monitoring unit 107.
  • Examples of the predetermined channels include Global Positioning System (GPS), WiMAX, and terrestrial digital broadcast channels.
  • FIG. 2 is an example of a cancellation effect table.
  • FIG. 2 shows a cancellation effect table 121 corresponding to each channel from channel 1 to channel 62 of terrestrial digital broadcasting.
  • the cancellation effect table 121 has items such as channel, last update time, I, Q, and RSSI, and these are stored in association with each other.
  • the channel indicates a channel of a signal received by the communication antenna 102.
  • the channel for example, there are a channel number of terrestrial digital broadcasting, a frequency band, GPS, WiMAX, and the like.
  • the last update time indicates the latest update time of the cancellation effect table 121.
  • I is an I value used for noise cancellation.
  • Q is a Q value used for noise cancellation.
  • RSSI indicates the reception intensity of a signal when noise cancellation is performed using the corresponding I value and Q value.
  • the last line of the cancel effect table 121 describes the minimum RSSI and I and Q corresponding to the minimum RSSI.
  • I and Q corresponding to the minimum RSSI are I / Q optimum values.
  • the channel of the cancellation effect table 121-1 is Ch.1, and the last update time is 15:10 on February 2, 2011. Further, the I / Q optimum values are I n1 and Q m1 .
  • FIG. 3 is a flowchart of the parameter setting process according to the first embodiment.
  • step S ⁇ b> 502 the position determination unit 111 determines the position of the information processing apparatus 101 and outputs the position information to the reception status determination unit 112.
  • the reception status determination unit 112 determines the signal reception status, that is, whether the communication antenna 102 can receive signals from other devices, based on the position information. If the signal is receivable, control proceeds to step S504. If the signal is not receivable, control proceeds to step S505.
  • step S504 the I / Q optimum value setting unit 109 reads the I / Q optimum value from the cancellation effect table 121 corresponding to the signal received by the communication antenna 102, and converts the I / Q optimum value to the phase amplitude adjustment unit 110. Set to.
  • the phase amplitude adjustment unit 110 performs noise cancellation using the I / Q optimum value.
  • step S505 the I / Q optimum value setting unit 109 determines whether adjustment of the I / Q value used for noise cancellation of the signal received by the communication antenna 102 has been completed. If the adjustment of the I / Q value has been completed, the control returns to step S502, and if the adjustment of the I / Q value has not been completed, the control proceeds to step S506.
  • the I / Q optimal value setting unit 109 determines whether or not the I / Q optimal value is described in the cancel effect table 121, for example. Further, the I / Q optimum value setting unit 109 determines whether or not a certain time has elapsed since the last update time of the cancellation effect table 121.
  • step S506 the reception intensity monitoring unit 107, the table setting unit 108, and the I / Q optimum value setting unit 109 calculate an I / Q optimum value.
  • the I / Q optimum value calculation processing in step S506 will be described.
  • step S507 the reception intensity monitoring unit 107 acquires RSSI and outputs the RSSI to the table setting unit 108.
  • the table setting unit 108 writes the input I / Q value and RSSI in association with each other in the cancellation effect table 121.
  • I MAX is a maximum value of a predetermined I value, and for example, 1024 is used.
  • step S510 the I / Q optimum value setting unit 109 adds 1 to I. Further, the I / Q optimum value setting unit 109 sets the I / Q value in the phase amplitude adjustment unit 110 and outputs it to the table setting unit 108. Further, the phase amplitude adjustment unit 110 performs noise cancellation using the set I / Q value.
  • Q MAX is a predetermined maximum Q value, and for example, 1024 is used.
  • step S512 the I / Q optimum value setting unit 109 sets I to 0 and adds 1 to Q. Further, the I / Q optimum value setting unit 109 sets the I / Q value in the phase amplitude adjustment unit 110 and outputs it to the table setting unit 108. Further, the phase amplitude adjustment unit 110 performs noise cancellation using the set I / Q value.
  • the I / Q optimum value setting unit 109 checks the RSSI value described in the cancellation effect table 121, and acquires the minimum RSSI and the I and Q corresponding to the minimum RSSI.
  • the I / Q optimum value setting unit 109 describes the acquired minimum RSSI and I and Q corresponding to the minimum RSSI as the I / Q optimum value in the last line of the cancellation effect table.
  • step S514 the I / Q optimum value setting unit 109 completes the adjustment of the I / Q value.
  • the I / Q optimum value calculation process in step S506 may be the following method.
  • FIG. 4 is another detailed flowchart of the I / Q optimum value calculation process.
  • step S522 the reception intensity monitoring unit 107 acquires RSSI and outputs the RSSI to the table setting unit 108. Then, the table setting unit 108 writes the input I / Q value and RSSI in association with each other in the cancellation effect table 121.
  • step S523 I / Q optimal value setting unit 109, Q is determined whether there are more Q MAX, if Q is greater than or equal to Q MAX, the control proceeds to step S525, if Q is less than Q MAX, control Advances to step S524.
  • step S524 the I / Q optimum value setting unit 109 adds 1 to Q. Further, the I / Q optimum value setting unit 109 sets the I / Q value in the phase amplitude adjustment unit 110 and outputs it to the table setting unit 108. Further, the phase amplitude adjustment unit 110 performs noise cancellation using the set I / Q value.
  • I / Q optimal value setting unit 109 checks the canceling effect table 121, Q value RSSI is minimum (in this case, the Q n) and the Q value of the I / Q optimum value. Further, I / Q optimal value setting unit 109 sets the Q and Q n. Further, the I / Q optimum value setting unit 109 sets the I / Q value in the phase amplitude adjustment unit 110 and outputs it to the table setting unit 108. Further, the phase amplitude adjustment unit 110 performs noise cancellation using the set I / Q value.
  • step S526 the reception intensity monitoring unit 107 acquires RSSI and outputs the RSSI to the table setting unit 108. Then, the table setting unit 108 writes the input I / Q value and RSSI in association with each other in the cancellation effect table 121.
  • step S527 I / Q optimal value setting unit 109, I is determined whether there are more I MAX, if I is greater than or equal to I MAX, control proceeds to step S529, if I is less than I MAX, control Advances to step S528.
  • step S528, the I / Q optimum value setting unit 109 adds 1 to I. Further, the I / Q optimum value setting unit 109 sets the I / Q value in the phase amplitude adjustment unit 110 and outputs it to the table setting unit 108. Further, the phase amplitude adjustment unit 110 performs noise cancellation using the set I / Q value.
  • step S529 the I / Q optimum value setting unit 109 checks the cancellation effect table 121, obtains the minimum RSSI, and sets the I value corresponding to the minimum RSSI (here, I m ) as the I / Q optimum.
  • the I value of the value is the minimum RSSI (here, I m ) as the I / Q optimum.
  • step S530 the I / Q optimum value setting unit 109 records the minimum RSSI, I m , and Q n obtained in step S529 in association with the last row of the cancellation effect table 121 as I / Q optimum values.
  • parameters used for noise cancellation can be adjusted. As a result, it is possible to obtain an optimal noise cancellation parameter for the information processing apparatus and to receive a high-quality signal.
  • the information processing apparatus of the first embodiment by using the reception intensity information, it is possible to adjust the noise cancellation parameter even in a user environment where it is difficult to obtain communication quality information.
  • the noise cancellation parameter for a GPS signal In the second embodiment, adjustment of a noise cancellation parameter for a GPS signal will be described.
  • FIG. 5 is a configuration diagram of an information processing apparatus according to the second embodiment.
  • the information processing apparatus 201 is, for example, a notebook personal computer or a mobile phone.
  • the information processing apparatus 201 includes a GPS antenna 202, a noise sampling antenna 203, an LSI 204, a storage unit 205, a GPS module 206, a reception intensity monitoring unit 207, a table setting unit 208, an I / Q optimum value calculation unit 209, and a phase amplitude adjustment.
  • Unit 210, position determination unit 211, reception status determination unit 212, WLAN antenna 213, and WLAN module 214 are examples of the reception status determination unit 212, WLAN antenna 213, and WLAN module 214.
  • the noise sampling antenna 203, the LSI 204, the reception intensity monitoring unit 207, the table setting unit 208, the I / Q optimum value calculation unit 209, and the phase amplitude adjustment unit 210 are the noise sampling antenna 103, the LSI 104, and the first embodiment. Since the reception intensity monitoring unit 107, the table setting unit 108, the I / Q optimum value calculation unit 109, and the phase amplitude adjustment unit 110 have the same functions, description thereof will be omitted.
  • the GPS antenna 202 is an antenna used for receiving GPS radio waves processed by the GPS module 206.
  • the GPS antenna 202 also receives noise generated by the LSI 204 that is a noise source.
  • the storage unit 205 stores a cancellation effect table 221 and a position determination table 222.
  • the cancellation effect table 221 describes I / Q values corresponding to GPS radio waves.
  • the configuration of the cancel effect table 221 is the same as that of the cancel effect table 121 of the first embodiment, and a description thereof will be omitted.
  • the position determination table 222 describes information indicating the installation location of the access point (AP) 231. Details of the position determination table 222 will be described later.
  • the GPS module 206 receives GPS radio waves from the satellite via the GPS antenna 202. Further, the GPS module 206 calculates the reception strength of the input signal, and outputs the calculated reception strength to the reception strength monitoring unit 207 as reception strength information. In the second embodiment, RSSI is used as the reception strength.
  • the reception intensity is not limited to RSSI, and the reception intensity monitoring unit 207 differs depending on the specifications of the GPS module 206, and other values and signals may be output.
  • the position determination unit 211 determines the location of the information processing apparatus 201, specifically whether it is outdoors or indoors, using the SSID and reception intensity input from the WLAN module 214 and the position determination table 222.
  • the position determination unit 211 outputs indoor / outdoor information indicating the location of the information processing apparatus 201 to the reception status determination unit 212.
  • the reception status determination unit 212 determines whether the information processing apparatus 201 can receive GPS radio waves using indoor / outdoor information.
  • the WLAN antenna 213 is an antenna used for wireless LAN (WLAN) communication.
  • the WLAN module 214 performs communication by WLAN. Further, the WLAN module 214 searches for the AP 231 around the information processing apparatus 201, acquires the SSID of the AP 231 and the RSSI of the radio wave from the AP 231, and outputs the SSID and the reception intensity to the position determination unit 211.
  • FIG. 6 is an example of a position determination table.
  • the position determination table 222 has an SSID, an installation position, and a threshold as items.
  • the SSID is a service set identifier (SSID) and is an identifier for identifying the AP 231.
  • the installation position indicates the installation location of the AP 231 and indicates whether the installation location of the AP is indoor or outdoor.
  • the threshold is a threshold used for determining the position of the information processing apparatus 201.
  • FIG. 7 is a flowchart of the parameter setting process according to the second embodiment.
  • step S601 the WLAN module 214 searches the AP 231 around the information processing apparatus 201, and acquires the SSID of the AP 231 and the radio wave reception intensity from the AP 231.
  • the WLAN module 214 outputs the acquired SSID and reception strength to the position determination unit 211.
  • step S ⁇ b> 602 the position determination unit 211 refers to the position determination table 222, and uses the SSID, installation location, threshold, and SSID and RSSI received from the WLAN module of the position determination table 222 to move the information processing apparatus 201 to the outdoors. Determine if it is indoor or indoor. Then, the position determination unit 211 outputs indoor / outdoor information indicating whether the information processing apparatus 201 is outdoors or indoors to the reception status determination unit 212. Details of the position determination process for determining whether the information processing apparatus 201 is outdoors or indoors will be described later. Further, the reception status determination unit 212 determines whether or not the GPS radio wave can be received. If the GPS radio wave can be received, the control proceeds to step S603.
  • the control proceeds to step S604. Proceed to In determining whether or not GPS radio waves can be received, the reception status determination unit 212 determines that GPS radio waves can be received when the indoor / outdoor information from the position determination unit 211 is outdoor, and the indoor / outdoor information is indoors. In the case of, it is determined that GPS radio waves cannot be received.
  • step S603 the I / Q optimum value setting unit 209 reads the I / Q optimum value from the cancellation effect table 221 corresponding to the GPS radio wave, and sets the I / Q optimum value in the phase amplitude adjustment unit 210.
  • the phase amplitude adjustment unit 210 performs noise cancellation using the I / Q optimum value.
  • step S604 the I / Q optimum value setting unit 209 determines whether or not the adjustment of the I / Q value used for canceling the GPS radio wave noise has been completed. If the adjustment of the I / Q value has been completed, the control returns to step S601. If the adjustment of the I / Q value has not been completed, the control proceeds to step S605.
  • step S605 the reception intensity monitoring unit 207, the table setting unit 208, and the I / Q optimum value setting unit 209 calculate an I / Q optimum value.
  • the I / Q optimum value calculation process in step S605 is the same as step S506 in the first embodiment or the I / Q optimum value calculation process in FIG.
  • step S621 the position determination unit 211 determines whether there is an AP 231 around the information processing apparatus 201. If the AP 231 is present, the control proceeds to step S623, and if there is no AP 231, the control proceeds to step S622. For example, if the AP 231 is not found in the search of the WLAN module 214, the position determination unit 211 determines that there is no AP 231.
  • step S622 the position determination unit 211 determines that the information processing apparatus 201 is outdoors.
  • step S623 the position determination unit 211 determines whether the number of APs 231 around the information processing apparatus 201 is one. If the number of APs 231 is one, the control proceeds to step S627. If the number of APs 231 is not one, the control proceeds to step 624.
  • step S624 the position determination unit 211 refers to the position determination table 222, and determines whether or not the installation positions of the APs 231 around the information processing apparatus 201 are all indoors. If the installation positions of all the APs 231 are indoors, the control proceeds to step S626. If the installation positions of at least one AP 231 are not indoors (that is, outdoors), the control proceeds to step S626. Alternatively, the position determination unit 211 refers to the position determination table 222 to determine whether the installation positions of a predetermined number (for example, two) or more of the APs 231 around the information processing apparatus 201 are indoors. Also good. When the installation positions of the APs 231 of the predetermined number or more are indoors, the control proceeds to step S626, and when the installation positions of the APs 231 less than the predetermined number are not indoors, the control proceeds to step S626.
  • a predetermined number for example, two
  • step S625 the position determination unit 211 determines that the information processing apparatus 201 is indoors. In step S626, the position determination unit 211 determines that the information processing apparatus 201 is outdoors.
  • step S627 the position determination unit 211 refers to the position determination table 222 and determines whether the RSSI is greater than the threshold value. If the RSSI is greater than the threshold, the control proceeds to step S629, and if the RSSI is less than or equal to the threshold, the control proceeds to step S628.
  • step S628 the position determination unit 211 determines that the information processing apparatus 201 is outdoors.
  • step S ⁇ b> 629 the position determination unit 211 refers to the position determination table 222 and determines the installation position of the position determination table 222 corresponding to the SSID received from the WLAN module 215 as the installation position of the information processing apparatus 201.
  • the information processing apparatus of the second embodiment it is possible to adjust the noise cancellation parameter for GPS radio waves. As a result, it is possible to obtain an optimal noise cancellation parameter for the information processing apparatus and to receive a high-quality signal.
  • the information processing apparatus of the second embodiment it is possible to adjust the noise cancellation parameter even in a user environment where it is difficult to obtain communication quality information by using the reception intensity information.
  • the third embodiment adjustment of a noise cancellation parameter for a WiMAX signal will be described.
  • FIG. 9 is a configuration diagram of an information processing apparatus according to the third embodiment.
  • the information processing apparatus 301 is, for example, a notebook personal computer or a mobile phone.
  • the information processing apparatus 301 includes a communication antenna 302, a noise sampling antenna 203, an LSI 304, a storage unit 305, a WiMAX module 306, a reception intensity monitoring unit 307, a table setting unit 308, an I / Q optimum value calculation unit 309, and a phase amplitude adjustment.
  • the noise sampling antenna 303, the LSI 304, the reception intensity monitoring unit 307, the table setting unit 308, the I / Q optimum value calculation unit 309, and the phase amplitude adjustment unit 310 are the noise sampling antenna 103, the LSI 104, Since the reception intensity monitoring unit 107, the table setting unit 108, the I / Q optimum value calculation unit 109, and the phase amplitude adjustment unit 110 have the same functions, description thereof will be omitted.
  • the communication antenna 302 is an antenna used for receiving WiMAX radio waves processed by the WiMAX module 306.
  • the communication antenna 302 also receives noise generated by the LSI 304 that is a noise source.
  • the storage unit 305 stores a cancellation effect table 321 and a base station cover area table 322.
  • the cancellation effect table 321 describes I / Q values corresponding to WiMAX.
  • the configuration of the cancel effect table 321 is the same as that of the cancel effect table 121 of the first embodiment, and a description thereof will be omitted.
  • the base station cover area table 322 is described in association with position information and information about whether or not within the WiMAX range. Details of the base station cover area table 322 will be described later.
  • the WiMAX module 306 receives WiMAX radio waves via the communication antenna 302. In addition, the WiMAX module 306 calculates the reception strength of the input signal, and outputs the calculated reception strength to the reception strength monitoring unit 307 as reception strength information. In the third embodiment, RSSI is used as the reception strength.
  • the reception intensity is not limited to RSSI, and the reception intensity monitoring unit 307 differs depending on the specifications of the WiMAX module 306, and other values and signals may be output.
  • the reception status determination unit 312 determines whether or not the information processing apparatus 301 is within or outside the WiMAX radio wave (that is, can receive the radio wave).
  • the GPS antenna 313 is an antenna used for receiving GPS radio waves.
  • the GPS module 314 receives GPS radio waves and calculates the position (latitude, longitude) of the information processing device 301.
  • the calculated latitude and longitude are output to the reception status determination unit 312 as latitude and longitude information.
  • FIG. 10 is an example of a base station cover area table.
  • the base station cover area table 322 includes items such as north latitude, east longitude, and radio wave status.
  • north latitude, east longitude, and radio wave status are described in association with each other.
  • North latitude and east longitude indicate the position.
  • north latitude and east longitude are used as the latitude and longitude indicating the position, respectively.
  • the radio wave status indicates whether the WiMAX radio wave can be received or the WiMAX radio wave cannot be received.
  • FIG. 11 is a flowchart of the parameter setting process according to the third embodiment.
  • step S701 the GPS module 314 calculates the current position of the information processing apparatus 301.
  • the GPS module 314 outputs the calculated latitude and longitude of the information processing device 301 to the situation determination unit 312 as latitude / longitude information.
  • the reception status determination unit 312 refers to the base station cover area table 322, and uses the north latitude, east longitude, and radio wave status of the base station cover area table 322 and the latitude / longitude information received from the GPS module 314. It is determined whether the processing device 201 is within or outside the WiMAX radio wave range. Specifically, the reception status determination unit 312 determines whether it is in or out of range with reference to the radio wave status of the base station cover area table 322 corresponding to the longitude and latitude included in the latitude and longitude information. That is, the reception status determination unit 312 determines whether or not the communication antenna 302 can receive WiMAX radio waves. If it is within the WiMAX radio wave range, control proceeds to step S703. If it is outside the WiMAX radio wave range, control proceeds to step S704.
  • step S703 the I / Q optimum value setting unit 309 reads the I / Q optimum value from the cancellation effect table 321 corresponding to WiMAX, and sets the I / Q optimum value in the phase amplitude adjustment unit 310.
  • the phase amplitude adjustment unit 310 performs noise cancellation using the I / Q optimum value.
  • step S704 the I / Q optimum value setting unit 309 determines whether or not adjustment of the I / Q value used for noise cancellation of the WiMAX signal has been completed. If the adjustment of the I / Q value has been completed, the control returns to step S701. If the adjustment of the I / Q value has not been completed, the control proceeds to step S705.
  • step S705 the reception intensity monitoring unit 307, the table setting unit 308, and the I / Q optimum value setting unit 309 calculate an I / Q optimum value.
  • the I / Q optimum value calculation process in step S705 is the same as step S506 in the first embodiment or the I / Q optimum value calculation process in FIG.
  • the information processing apparatus of the third embodiment it is possible to adjust the noise cancellation parameter for WiMAX radio waves. As a result, it is possible to obtain an optimal noise cancellation parameter for the information processing apparatus and to receive a high-quality signal.
  • the information processing apparatus of the third embodiment by using the reception intensity information, it is possible to adjust the noise cancellation parameter even in a user environment where it is difficult to obtain communication quality information.
  • the fourth embodiment adjustment of a noise cancellation parameter for terrestrial digital broadcasting will be described.
  • FIG. 12 is a configuration diagram of an information processing apparatus according to the fourth embodiment.
  • the information processing apparatus 401 is, for example, a notebook personal computer or a mobile phone.
  • the information processing apparatus 401 includes a TV antenna 402, a noise sampling antenna 403, an LSI 404, a storage unit 405, a terrestrial digital broadcast (terrestrial digital) module 406, a reception intensity monitoring unit 407, a table setting unit 408, and an I / Q optimum value.
  • a calculation unit 409, a phase amplitude adjustment unit 410, a determination unit 411, a cancel band determination unit 412, a GPS antenna 413, and a GPS module 414 are provided.
  • the noise sampling antenna 403, the LSI 404, the reception intensity monitoring unit 407, the table setting unit 408, the I / Q optimum value calculation unit 409, and the phase amplitude adjustment unit 410 are the noise sampling antenna 103, the LSI 104, Since the reception intensity monitoring unit 107, the table setting unit 108, the I / Q optimum value calculation unit 109, and the phase amplitude adjustment unit 110 have the same functions, description thereof will be omitted.
  • the TV antenna 402 is an antenna used for receiving radio waves of terrestrial digital broadcasting processed by the terrestrial digital module 406.
  • the TV antenna 402 also receives noise generated by the LSI 404 that is a noise source.
  • the storage unit 405 stores a cancellation effect table 421 and a terrestrial digital broadcast (terrestrial digital) data table 422.
  • the cancellation effect table 421 an I / Q value corresponding to each frequency is described for each frequency (or each channel) of terrestrial digital broadcasting.
  • the configuration of the cancel effect table 421 is the same as that of the cancel effect table 121 of the first embodiment, and a description thereof will be omitted.
  • the terrestrial digital data table 422 is described by associating position information (northern latitude, east longitude) with frequencies.
  • the terrestrial digital data table 422 indicates the frequency of terrestrial digital broadcasting that can be received at the location indicated by the position information.
  • a channel number may be described instead of the frequency. Details of the terrestrial digital data table 422 will be described later.
  • the terrestrial digital module 406 receives a terrestrial digital broadcast signal of a set channel (or frequency band) via the TV antenna 402. Also, the terrestrial digital module 406 calculates the reception strength of the input signal, and outputs the calculated reception strength to the reception strength monitoring unit 407 as reception strength information.
  • RSSI is used as the reception strength.
  • the reception intensity is not limited to RSSI, and the reception intensity monitoring unit 407 differs depending on the specifications of the terrestrial digital module 406, and other values and signals may be output.
  • the cancellation band determination unit 412 specifies the frequency of digital terrestrial broadcasting that can be received by the information processing apparatus 401, using the latitude / longitude information and the terrestrial digital data table 422. In addition, the cancel band determination unit 412 identifies a frequency of terrestrial digital broadcasting that cannot be received by the information processing apparatus 401.
  • the GPS antenna 413 is an antenna used for receiving GPS radio waves.
  • the GPS module 414 receives GPS radio waves and calculates the position (latitude, longitude) of the information processing apparatus 401.
  • the calculated latitude and longitude are output to the cancel band determination unit 412 as latitude and longitude information.
  • FIG. 13 is an example of a terrestrial digital data table.
  • the terrestrial digital data table 422 has north latitude, east longitude, and frequency as items. In the terrestrial digital data table 422, north latitude, east longitude, and frequency are described in association with each other.
  • North latitude and east longitude indicate the position.
  • north latitude and east longitude are used as the latitude and longitude indicating the position, respectively.
  • the frequency indicates the frequency of terrestrial digital broadcasting.
  • the terrestrial digital data table 422 in FIG. 13 indicates that terrestrial digital broadcasting with a frequency of 512 to 566 MHz can be received at a position of 34.7 degrees north latitude and 134.9 degrees east longitude.
  • FIG. 14 is a flowchart of parameter setting processing according to the fourth embodiment.
  • the GPS module 414 calculates the current position of the information processing apparatus 401.
  • the GPS module 414 outputs the calculated latitude and longitude of the information processing apparatus 401 to the cancel band determination unit 412 as latitude / longitude information.
  • the cancel band determination unit 412 reads the terrestrial digital data table 422 and identifies the frequencies that can be received by the TV antenna 402 by comparing with the latitude / longitude information input from the GPS module 414.
  • the cancel band determination unit 412 specifies a frequency other than the frequency that can be received by the TV antenna 402.
  • a frequency other than the receivable frequency is called an unused band.
  • a frequency other than the frequency that can be received by the TV antenna 402 among the frequencies described in the cancellation effect table 421 is set as an unused band.
  • step S803 the cancel band determination unit 412 determines whether or not cancellation parameter setting for an unused band is necessary. If cancellation parameter setting is necessary, control proceeds to step S805, and cancellation parameter setting is necessary. Otherwise, control continues to step S804. For example, with reference to the cancellation effect table 421 corresponding to the unused band, the optimum I / Q value is set in the cancellation effect table 421 corresponding to the unused band. Judgment is made based on whether or not
  • step S804 the I / Q optimum value setting unit 409 reads the I / Q optimum value from the cancellation effect table 421 corresponding to the unused band, and sets the I / Q optimum value in the phase amplitude adjustment unit 410.
  • the phase amplitude adjustment unit 410 performs noise cancellation using the I / Q optimum value.
  • the terrestrial digital module 406 processes an unused band signal.
  • step S805 the I / Q optimum value setting unit 409 determines whether or not adjustment of the I / Q value used for noise cancellation of the signal in the unused band has been completed. If the adjustment of the I / Q value has been completed, the control returns to step S801. If the adjustment of the I / Q value has not been completed, the control proceeds to step S806.
  • step S806 the reception intensity monitoring unit 407, the table setting unit 408, and the I / Q optimum value setting unit 409 calculate an I / Q optimum value.
  • the I / Q optimum value calculation process in step S806 is similar to step S506 in the first embodiment or the I / Q optimum value calculation process in FIG.
  • the information processing apparatus of the fourth embodiment it is possible to adjust a noise cancellation parameter for a terrestrial digital broadcast signal. As a result, it is possible to obtain an optimal noise cancellation parameter for the information processing apparatus and to receive a high-quality signal.
  • the information processing apparatus of the fourth embodiment by using the reception intensity information, it is possible to adjust the noise cancellation parameter even in a user environment where it is difficult to obtain communication quality information.
  • FIG. 15 is a hardware configuration diagram of the information processing apparatus.
  • the information processing apparatus 10 is an example of the information processing apparatuses 101, 201, 301, and 401 of the above-described embodiments.
  • the information processing apparatus 10 includes a central processing unit (CPU) 11, a memory 12, a hard disk drive (HDD) 13, a GPS 14, a communication antenna 15, a radio module 16, an ANC 17, a noise sampling antenna 18, and an I / Q setting unit. 19 is provided.
  • CPU central processing unit
  • HDD hard disk drive
  • GPS GPS
  • communication antenna a radio module 16, an ANC 17, a noise sampling antenna 18, and an I / Q setting unit. 19 is provided.
  • the CPU 11, the memory 12, the HDD 13, the GPS 14, the wireless module 16, the ANC 17, and the I / Q setting unit 19 are connected via a bus.
  • the communication antenna 15 is connected to the wireless module 16.
  • the noise sampling antenna 18 is connected to the ANC 17.
  • the CPU 11 reads the program stored in the memory 12 and performs the above-described noise cancellation parameter setting process.
  • the CPU 11 corresponds to the reception status determination units 112, 212, 312, the cancel band determination unit 412, the reception intensity monitoring units 107, 207, 307, 407, and the table setting units 108, 208, 308, 408.
  • the memory 12 stores various data used in the above-described noise cancellation parameter setting process and a program for executing the noise cancellation parameter setting process.
  • the HDD 13 stores tables used in the noise cancellation parameter setting process, such as a cancellation effect table 121, a position determination table 222, a base station cover area table 322, a terrestrial digital data table 422, and the like.
  • the HDD 13 corresponds to the storage units 105, 205, 305, and 405.
  • the GPS 14 calculates the position of the information processing apparatus 10.
  • the GPS 14 corresponds to the position determination units 111 and 211 and the GPS modules 314 and 414.
  • the communication antenna 15 is an antenna that is processed by the wireless module 16 and used to receive signals from other devices.
  • the communication antenna 15 corresponds to the communication antennas 102 and 302, the GPS antenna 201, and the TV antenna 402.
  • the wireless module 16 receives a signal of the set channel (or frequency) from another device via the communication antenna 15.
  • the wireless module 16 corresponds to the wireless module 106, the GPS module 206, the WiMAX module 306, and the terrestrial digital module 406.
  • the ANC 17 removes the noise signal from the received signal using the set I / Q value. Specifically, the ANC 17 adjusts the noise signal sampled by the noise sampling antenna 18 using the I / Q value, and outputs the adjusted noise signal in reverse phase.
  • the ANC 17 corresponds to the phase adjustment amplitude units 110, 210, 310, and 410.
  • the noise sampling antenna 18 receives noise from an LSI (not shown) mounted on the information processing apparatus 10.
  • the noise sampling antenna 18 corresponds to the noise sampling antennas 103, 203, 303, and 403.
  • the I / Q setting unit 19 sets an I / Q value used in the ANC 17.
  • the I / Q setting unit 19 corresponds to the I / Q optimum value calculation units 109, 209, 309, and 409.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

L'invention concerne un appareil de traitement d'informations pourvu : d'une première antenne qui reçoit à la fois un premier signal provenant d'un appareil de transmission et un bruit, ou juste le bruit ; d'une seconde antenne qui reçoit le bruit ; d'une unité d'annulation de bruit qui ajuste le bruit reçu par la seconde antenne en utilisant un paramètre, et qui ajoute le bruit ajusté au signal reçu par la première antenne pour annuler le bruit reçu par la première antenne ; d'un module sans fil qui traite un second signal qui est le résultat de l'annulation du bruit, et qui délivre l'intensité de réception du second signal ; d'une unité d'évaluation d'état de réception qui évalue si le premier signal peut être reçu par la première antenne ; d'une unité de paramétrage qui écrit, lorsque l'unité d'évaluation d'état de réception évalue que le premier signal ne peut pas être reçu par la première antenne, le paramètre et l'intensité de réception dans une table de paramètres en association l'un avec l'autre ; et d'une unité de modification de paramètre qui modifie le paramètre à utiliser par l'unité d'annulation de bruit, à chaque fois que le paramètre et l'intensité de réception sont écrits dans la table de paramètres.
PCT/JP2011/056664 2011-03-18 2011-03-18 Appareil de traitement d'informations pour définir un paramètre d'annulation de bruit, et programme pour définir un paramètre d'annulation de bruit Ceased WO2012127594A1 (fr)

Priority Applications (2)

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JP2013505669A JP5686181B2 (ja) 2011-03-18 2011-03-18 ノイズキャンセルパラメータの設定を行う情報処理装置およびノイズキャンセルパラメータ設定プログラム
PCT/JP2011/056664 WO2012127594A1 (fr) 2011-03-18 2011-03-18 Appareil de traitement d'informations pour définir un paramètre d'annulation de bruit, et programme pour définir un paramètre d'annulation de bruit

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PCT/JP2011/056664 WO2012127594A1 (fr) 2011-03-18 2011-03-18 Appareil de traitement d'informations pour définir un paramètre d'annulation de bruit, et programme pour définir un paramètre d'annulation de bruit

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JP7782543B2 (ja) 2021-03-02 2025-12-09 ソニーグループ株式会社 ノイズキャンセル装置、ノイズキャンセル方法および電子機器
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