WO2003103249A1 - Procede et systeme de transmission rapide de donnees selon la technique amrc - Google Patents

Procede et systeme de transmission rapide de donnees selon la technique amrc Download PDF

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Publication number
WO2003103249A1
WO2003103249A1 PCT/CN2002/000367 CN0200367W WO03103249A1 WO 2003103249 A1 WO2003103249 A1 WO 2003103249A1 CN 0200367 W CN0200367 W CN 0200367W WO 03103249 A1 WO03103249 A1 WO 03103249A1
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WO
WIPO (PCT)
Prior art keywords
carrier
transmitting
carriers
bandwidth
antenna
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2002/000367
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English (en)
Chinese (zh)
Inventor
Gang Wang
Dandan Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linkair Communications Inc
Original Assignee
Linkair Communications Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linkair Communications Inc filed Critical Linkair Communications Inc
Priority to PCT/CN2002/000367 priority Critical patent/WO2003103249A1/fr
Priority to AU2002313158A priority patent/AU2002313158A1/en
Priority to CNA028181247A priority patent/CN1555641A/zh
Publication of WO2003103249A1 publication Critical patent/WO2003103249A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0055—ZCZ [zero correlation zone]
    • H04J13/007—LAS, i.e. LA, LS and LAS codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/22—Allocation of codes with a zero correlation zone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems

Definitions

  • the present invention belongs to the field of communication technology, and particularly relates to wireless spread spectrum communication and digital mobile communication technologies, and in particular, it relates to a high-speed data transmission method and system for CDMA.
  • the first environment and requirements fast moving environment, the highest rate is 144kbi t / s;
  • the third environment and requirements outdoor to indoor or pedestrian environment, the highest rate is 384kbi t / s. It has been predicted that the speed of the fourth generation mobile communication can reach more than 10 Mbps, and may even reach 30 Mbps to 100 Mbps.
  • the frequency band of the first generation of analog mobile communication is several hundred megahertz
  • the frequency band of the second generation of digital mobile phone systems is several hundred megahertz to over gigahertz.
  • the frequency band of the next three or three generations of mobile communication will be 2 gigahertz (2GHz) about.
  • a multi-antenna transmitting and receiving system namely a multiple-input multiple-output system (MIM0: mul t iple-input mul t iple- output)
  • MIM0 multiple-input multiple-output system
  • mul t iple-input mul t iple- output can be used to obtain spatial diversity gain to improve performance or spectral efficiency, Increase system capacity. That is, by using multiple antennas for transmission and reception, the purpose of transmitting data at a higher rate based on the existing frequency band can be achieved.
  • the capacity of MIM0 system is a product of multiples of SISO (s ingle-input s ingle-output) and the product of the number of transmit and receive antennas. Directly proportional.
  • a single carrier or a multi-carrier is often used (as shown in FIG. 1, FIG. 2a, and FIG. 2b).
  • the traditional multi-carrier adopted is characterized in that between the two carriers There is a certain frequency guard interval. This interval should undoubtedly be improved in wireless communications where frequency resources are very tight.
  • LAS-CDMA that is, large area synchronous code division multiple access
  • LAS-CDMA that is, large area synchronous code division multiple access
  • 3 times higher than all current 3G systems and an all-IP mobile communication system Will enable users to enjoy low calling fees.
  • it can also support voice and data services of different rates at the same time, and the user data rate can exceed 4 Mbps, achieve high-precision positioning, support high-speed movement, and avoid strong interference between 4 and so on.
  • An object of the present invention is to provide a high-speed data transmission method and system for CDMA, which aims to combine spread spectrum technology, carrier orthogonality, and MIM0 to obtain a high-frequency spectrum utilization suitable for high-speed data transmission. Method and system.
  • a high-speed data transmission method for CDMA which is characterized in that: at the transmitting end, LS code is used as a spreading code for spreading; at least two carriers are placed on the bandwidth of the communication frequency band, and between each carrier Overlapping; transmitting the carrier wave using a transmitting antenna;
  • a receiving antenna is used to receive a carrier transmitted from a transmitting antenna, and the received carrier is processed.
  • the at least two carriers are placed on the bandwidth of the communication frequency band, and the overlap between each carrier means that: two or more orthogonal carriers can be placed on the bandwidth.
  • the number of releasable carriers is related to the bandwidth of the baseband signal and the available carrier frequency bandwidth.
  • the use of a transmitting antenna to transmit the carrier refers to: using at least two transmitting antennas to transmit the carrier.
  • the use of a receiving antenna to receive a carrier transmitted from a transmitting antenna refers to: At least one receiving antenna is required to receive a carrier transmitted from a transmitting antenna.
  • the method for high-speed data transmission for CDMA includes the following steps:
  • two or more mutually orthogonal carriers may be placed on the same bandwidth
  • the carrier may be transmitted by using two or more multiple transmitting antennas; One or more receiving antennas may be used to receive the carrier transmitted from the transmitting antenna; at least the received carriers need to be de-carriered.
  • two or more orthogonal carriers that can be selected on the same bandwidth can be selected.
  • a bandwidth of 4fc three carriers with a baseband bandwidth of 2fc are placed. See Figure 4.
  • the method for high-speed data transmission for CDMA further includes the steps of: spreading user data by using an LS code as a spreading code;
  • the carrier may be transmitted by using two transmitting antennas;
  • Two receiving antennas can be used to receive the carrier from the transmitting antenna
  • De-carrier, de-spread, and parallel-to-serial conversion are performed on the received data.
  • the present invention also provides a high-speed data transmission system for CDMA, which includes: an LS code that can spread the input data, and can place at least two carriers on the communication band bandwidth, and each of the carriers There are overlapping transmitting devices between them; a transmitting antenna capable of transmitting the carrier wave;
  • a receiving antenna capable of receiving a carrier wave transmitted from a transmitting antenna; a receiving device capable of processing the received carrier wave.
  • the transmitting device may include: a carrier generating device capable of placing two or more multiple orthogonal carriers on a bandwidth.
  • the transmitting antenna refers to: at least two transmitting antennas.
  • the receiving antenna refers to: at least one receiving antenna.
  • the system is characterized in that the transmitting device may include: LS code is used as the spreading code (Of course, the spreading code can be not limited to the LS code, but because the LS code has the "zero window" characteristic, the system performance will be better under the condition of multipath wireless propagation).
  • LS code is used as the spreading code (Of course, the spreading code can be not limited to the LS code, but because the LS code has the "zero window" characteristic, the system performance will be better under the condition of multipath wireless propagation).
  • Serial-to-parallel conversion device for performing serial-to-parallel conversion on the spread data
  • Modulation device for placing serial-to-parallel data on six carriers respectively
  • the receiving device may include: two receiving antennas; a carrier removing device; a despreading device; and a parallel-to-serial conversion device.
  • the two transmitting antennas can be generalized to n ⁇ 2) transmitting antennas.
  • the two receiving antennas can be generalized to m (m ⁇ 1) receiving antennas.
  • the beneficial effects of the present invention are as follows:
  • the LS-CDMA LS code is used in the spread spectrum technology of the present invention. Because of its good auto-correlation and cross-correlation characteristics, this code is commonly known as the zero window. It can effectively resist the fading of high-speed movement.
  • 3 orthogonal carriers are placed on the 4fc bandwidth, and there is overlap between each carrier. This increases the number of carriers within the same bandwidth. Improved spectrum utilization.
  • multi-antenna reception the structure of the actual system is considered. The main use is MIM0 with two rounds and two rounds. In fact, this technology can be extended to the transmission and reception of n ( « ⁇ 2) antennas.
  • the three-carrier system with two transmitting antennas can increase the signal transmission rate by three times compared to a single antenna system (see Figure 2b). If n antennas are used, Antenna transmission, in total, can increase the transmission rate of 1.5 * n times.
  • the number of carriers can be determined by the bandwidth. According to the needs of the business, flexible carrier And codewords are distributed to users who need them.
  • FIG. 1 is a block diagram of the MIM0 system in the prior art
  • FIG. 2a is a schematic diagram of a single carrier in the prior art
  • FIG. 2b is a schematic diagram of a conventional multi-carrier in the prior art
  • FIG. 3 is a block diagram of a two-issue, two-receive MIM0 system according to the present invention.
  • FIG. 4 is a schematic diagram of three complete orthogonal carriers according to the present invention.
  • FIG. 5 is a schematic diagram of a single user using a multi-carrier transmitting end according to a specific embodiment of the present invention
  • FIG. 6 is a schematic diagram of a single user using a multi-carrier receiving end according to a specific embodiment of the present invention
  • ⁇ ⁇ r 2 represents antenna 1 and antenna 2 respectively Receiving
  • FIG. 7 is a schematic diagram of a multi-user using multiple carriers according to a specific embodiment of the present invention.
  • FIG. 8 is a schematic diagram of receiving a single user and a single carrier according to a specific embodiment of the present invention.
  • k represents the k-th user, and the range of k is determined according to the number of codewords and the number of carriers.
  • the traditional MIM0 system uses either a single carrier or multiple carriers, but there is a certain frequency guard interval between the two carriers. In wireless communications with tight frequency resources, it should undoubtedly be improved.
  • the chip rate is 1. 2288Mchip / s, and the bandwidth is about 1.6 z. This allows three carriers to be transmitted over a 5M bandwidth. But these carriers do not overlap.
  • the LS code is used as a spreading code for spreading; at least two carriers are placed on the bandwidth of the communication band, and there is overlap between each carrier; and the carrier is transmitted by using a transmitting antenna. Transmitting out; at the receiving end, a receiving antenna is used to receive a carrier transmitted from the transmitting antenna, and the received carrier is processed.
  • the present invention transmits three carriers that overlap each other on a 4 fc bandwidth.
  • the distance between each center carrier frequency is 1/2 the bandwidth, so that the general efficiency of the frequency i can be increased by 1.5 times compared to Fig. 2b.
  • Two antennas are used for transmitting and receiving at the same time, so the total utilization of spectrum resources should be increased by three times.
  • the present invention transmits six carriers on two antennas to one user at the same time during transmission, as shown in FIG. 5, FIG. 6, and FIG.
  • the data of the same user spread with the same spreading code are transmitted on six carriers simultaneously.
  • the original single carrier can be transmitted at six times the rate.
  • the capacity can be increased by 3 times without overlapping between carriers. More importantly, as shown in FIG. 8, at this time, the receiver only needs to receive with one antenna. This increases the capacity of the system while keeping the mobile terminal as simple as possible.
  • the capacity of the system can be increased by n times.
  • the increase in the number of receiving antennas can be used to obtain gain.
  • the present invention uses the LS-CDMA LS code in the spread spectrum technology. Because of its good auto-correlation and cross-correlation characteristics, this code is commonly referred to as the zero window. It can effectively resist fading at high speed. At the same time, 3 orthogonal carriers are placed on the 4fc bandwidth, and there is overlap between each carrier. This increases the number of carriers within the same bandwidth. Increased spectrum utilization. In terms of multi-antenna reception, the structure of the actual system is considered. The main use is MIM0 with two rounds and two rounds. In fact, this technology can be extended to the transmission and reception of n (n> 2) antennas.
  • 5 * n times the transmission rate can be increased by a system of two non-overlapping carriers on each antenna, and the transmission rate can be increased by 3 times. If n ⁇ 2) antennas are used for transmission .
  • the number of carriers can be determined by the bandwidth. Carriers and codewords are allocated flexibly to users who need them based on service needs.
  • V-BLAST An Architecture for Realizing Very High Data Rates Over the Rich-Scattering Wireless Channel P.W.Wolniansky G.J.Foschini, G.D.Golen, R.A. Valenzuela [2] Signal Detection for MIMO-OFDM Wireless Communication Ye Lijack

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

L'invention concerne un procédé et un système pour la transmission rapide de données selon la technique AMRC. L'invention se caractérise en ce que: un code LS est adopté en tant que code de fréquence d'étalement pour l'étalement au niveau du terminal émetteur; au moins deux porteuses sont situées dans la largeur de bande de communication, ces deux porteuses se chevauchant mutuellement et étant émises par l'intermédiaire de plusieurs antennes émettrices; une onde porteuse émise par une antenne émettrice est reçue par une antenne réceptrice et les porteuses reçues sont traitées. La technologie consistant à combiner une multiporteuse orthogonale avec MIMO augmente l'efficacité d'utilisation du spectre grâce au fait que l'on tire complètement profit de la diversité spatiale et de l'orthogonalité de fréquence. Ainsi, sur la base d'une fréquence existante, la vitesse de transmission peut être augmentée de trois fois si l'on compare à celle obtenue avec un système d'émission/réception à une seule antenne dans lequel chaque antenne est utilisée pour deux fréquences séparées. Si N antennes sont utilisées pour la transmission, la vitesse de transmission peut, au total, augmenter de 1.5<sp>*</sp>n fois. Le nombre de porteuses peut être décodé en fonction de la largue de bande. Les porteuses et les codes sont assignés de façon souple aux utilisateurs en fonction du trafic.
PCT/CN2002/000367 2002-05-30 2002-05-30 Procede et systeme de transmission rapide de donnees selon la technique amrc Ceased WO2003103249A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/CN2002/000367 WO2003103249A1 (fr) 2002-05-30 2002-05-30 Procede et systeme de transmission rapide de donnees selon la technique amrc
AU2002313158A AU2002313158A1 (en) 2002-05-30 2002-05-30 A method and system for speed data transmission in cdma
CNA028181247A CN1555641A (zh) 2002-05-30 2002-05-30 一种用于cdma的高速数据传输方法及系统

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Application Number Priority Date Filing Date Title
PCT/CN2002/000367 WO2003103249A1 (fr) 2002-05-30 2002-05-30 Procede et systeme de transmission rapide de donnees selon la technique amrc

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2404533A (en) * 2003-07-15 2005-02-02 Panagiotis Fines Multicarrier transmission using overlapping frequency channels.
WO2006114030A1 (fr) * 2005-04-25 2006-11-02 Zte Corporation Procede permettant d’augmenter la capacite dans le sens montant d’un systeme a entrees multiples et a sorties multiples du type wcdma et son appareil

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101860427B (zh) * 2005-07-05 2012-04-18 上海原动力通信科技有限公司 多载波hsdpa的业务传输信道编码方法和编码装置
CN101039295B (zh) * 2006-03-15 2012-01-11 方正宽带网络服务股份有限公司 利用低相关码字改进正交频分复用系统同步性能的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001058072A1 (fr) * 2000-02-02 2001-08-09 Ntt Docomo, Inc. Procede de transmission de paquets sur simple porteuse/ds-amdc, procede de transmission ascendante de paquets dans un systeme de communication mobile multiporteuse/ds-amdc et structure de voie descendante de systeme de communication mobile multiporteuse/ds-amdc
CN1321674A (zh) * 2000-04-29 2001-11-14 上海博德基因开发有限公司 一种新的多肽——人npat蛋白15和编码这种多肽的多核苷酸
CN1336048A (zh) * 2000-04-18 2002-02-13 连宇通信有限公司 一种扩频多地址码的正交变换方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001058072A1 (fr) * 2000-02-02 2001-08-09 Ntt Docomo, Inc. Procede de transmission de paquets sur simple porteuse/ds-amdc, procede de transmission ascendante de paquets dans un systeme de communication mobile multiporteuse/ds-amdc et structure de voie descendante de systeme de communication mobile multiporteuse/ds-amdc
CN1336048A (zh) * 2000-04-18 2002-02-13 连宇通信有限公司 一种扩频多地址码的正交变换方法
CN1321674A (zh) * 2000-04-29 2001-11-14 上海博德基因开发有限公司 一种新的多肽——人npat蛋白15和编码这种多肽的多核苷酸

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2404533A (en) * 2003-07-15 2005-02-02 Panagiotis Fines Multicarrier transmission using overlapping frequency channels.
WO2006114030A1 (fr) * 2005-04-25 2006-11-02 Zte Corporation Procede permettant d’augmenter la capacite dans le sens montant d’un systeme a entrees multiples et a sorties multiples du type wcdma et son appareil

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Publication number Publication date
AU2002313158A1 (en) 2003-12-19
CN1555641A (zh) 2004-12-15

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