BR0316005A - Estimativa de ruìdo e canal utilizando fatores de baixo espalhamento - Google Patents

Estimativa de ruìdo e canal utilizando fatores de baixo espalhamento

Info

Publication number
BR0316005A
BR0316005A BR0316005-0A BR0316005A BR0316005A BR 0316005 A BR0316005 A BR 0316005A BR 0316005 A BR0316005 A BR 0316005A BR 0316005 A BR0316005 A BR 0316005A
Authority
BR
Brazil
Prior art keywords
channel estimation
noise
code
low scatter
scatter factors
Prior art date
Application number
BR0316005-0A
Other languages
English (en)
Inventor
Da-Shan Shiu
Durga P Malladi
Srikrishna Bhashyam
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BR0316005A publication Critical patent/BR0316005A/pt

Links

Classifications

    • 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
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

"ESTIMATIVA DE RUìDO E CANAL UTILIZANDO FATORES DE BAIXO ESPALHAMENTO". Medições de ruído são feitas dentro de uma fração de um único período de símbolos de um símbolo de código ortogonal mais longo. Um processador de controle (520) identifica um código não ocupado que tem um fator de espalhamento que é menor que um fator de espalhamento mais longo para o sistema. Um desespalhador (512) mede a energia de símbolo com base no código não ocupado, e um avaliador de ruído (516) gera estimativas de ruído com base nas energias de símbolo medidas. A estação de assinante utiliza técnicas semelhantes para fazer estimativas de canal dentro de um período que é uma fração de um período de símbolos de um código com fator de espalhamento mais longo.
BR0316005-0A 2002-11-06 2003-11-05 Estimativa de ruìdo e canal utilizando fatores de baixo espalhamento BR0316005A (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US42447402P 2002-11-06 2002-11-06
US10/290,749 US7254170B2 (en) 2002-11-06 2002-11-07 Noise and channel estimation using low spreading factors
PCT/US2003/035260 WO2004045096A2 (en) 2002-11-06 2003-11-05 Noise and channel estimation using low spreading factors

Publications (1)

Publication Number Publication Date
BR0316005A true BR0316005A (pt) 2005-09-13

Family

ID=32314375

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0316005-0A BR0316005A (pt) 2002-11-06 2003-11-05 Estimativa de ruìdo e canal utilizando fatores de baixo espalhamento

Country Status (13)

Country Link
US (3) US7254170B2 (pt)
EP (3) EP2187587A1 (pt)
JP (2) JP4643270B2 (pt)
KR (1) KR101118489B1 (pt)
AT (1) ATE463084T1 (pt)
AU (1) AU2003291298A1 (pt)
BR (1) BR0316005A (pt)
CA (1) CA2504822A1 (pt)
DE (1) DE60331942D1 (pt)
MX (1) MXPA05004953A (pt)
RU (1) RU2342777C2 (pt)
TW (2) TW201115939A (pt)
WO (1) WO2004045096A2 (pt)

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US8326339B2 (en) * 2006-08-04 2012-12-04 Broadcom Corporation Method and apparatus to compute a noise power estimate in a WCDMA network
US8098715B2 (en) * 2007-06-08 2012-01-17 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for estimating impairment covariance matrices using unoccupied spreading codes
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US8009777B2 (en) * 2007-06-15 2011-08-30 Icera, Inc. Processing data in a digital communications system
US7782926B2 (en) * 2008-03-18 2010-08-24 On-Ramp Wireless, Inc. Random phase multiple access communication interface system and method
US8520721B2 (en) 2008-03-18 2013-08-27 On-Ramp Wireless, Inc. RSSI measurement mechanism in the presence of pulsed jammers
US8477830B2 (en) 2008-03-18 2013-07-02 On-Ramp Wireless, Inc. Light monitoring system using a random phase multiple access system
US20090239550A1 (en) * 2008-03-18 2009-09-24 Myers Theodore J Random phase multiple access system with location tracking
US7733945B2 (en) * 2008-03-18 2010-06-08 On-Ramp Wireless, Inc. Spread spectrum with doppler optimization
US7773664B2 (en) * 2008-03-18 2010-08-10 On-Ramp Wireless, Inc. Random phase multiple access system with meshing
US8958460B2 (en) 2008-03-18 2015-02-17 On-Ramp Wireless, Inc. Forward error correction media access control system
US8363699B2 (en) 2009-03-20 2013-01-29 On-Ramp Wireless, Inc. Random timing offset determination
US7639726B1 (en) * 2009-03-20 2009-12-29 On-Ramp Wireless, Inc. Downlink communication
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US20130294276A1 (en) * 2011-01-13 2013-11-07 Telefonaktiebolaget L M Ericsson (Publ) Estimation of channel quality indicator using unused codes
CN102111181B (zh) * 2011-03-18 2013-09-11 华为技术有限公司 平均码片能量与总发送功率谱密度之比的估计方法和装置
US9209858B2 (en) * 2011-04-12 2015-12-08 Alcatel Lucent Method and apparatus for determining uplink noise power in a wireless communication system
US8767799B2 (en) 2011-04-12 2014-07-01 Alcatel Lucent Method and apparatus for determining signal-to-noise ratio
US9504014B2 (en) 2012-04-09 2016-11-22 Qualcomm Incorporated Methods and apparatuses for P-CCPCH-aided channel estimation in wireless systems
CN103379607B (zh) * 2012-04-17 2018-01-30 中兴通讯股份有限公司 Td‑hspa+终端设备的增益控制方法和装置
JP6182895B2 (ja) * 2012-05-01 2017-08-23 株式会社リコー 処理装置、処理方法、プログラム及び処理システム
US9571185B2 (en) * 2013-05-20 2017-02-14 Telefonaktiebolaget Lm Ericsson (Publ) Robust, fast unused-code detection
DE102013213295A1 (de) * 2013-07-08 2015-01-08 Continental Automotive Gmbh Vorrichtung und Verfahren zur schmalbandigen Datenübertragung mittels eines DSSS-Übertragungssystems

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Also Published As

Publication number Publication date
JP2011055509A (ja) 2011-03-17
DE60331942D1 (de) 2010-05-12
JP2006506017A (ja) 2006-02-16
EP1561283A2 (en) 2005-08-10
EP1561283B1 (en) 2010-03-31
TW201115939A (en) 2011-05-01
US8514909B2 (en) 2013-08-20
ATE463084T1 (de) 2010-04-15
US20040091034A1 (en) 2004-05-13
RU2342777C2 (ru) 2008-12-27
JP4643270B2 (ja) 2011-03-02
KR101118489B1 (ko) 2012-03-16
US8135056B2 (en) 2012-03-13
JP5226752B2 (ja) 2013-07-03
WO2004045096A2 (en) 2004-05-27
CA2504822A1 (en) 2004-05-27
US20110158293A1 (en) 2011-06-30
EP2187587A1 (en) 2010-05-19
WO2004045096A3 (en) 2004-09-23
EP2187528A1 (en) 2010-05-19
US7254170B2 (en) 2007-08-07
AU2003291298A1 (en) 2004-06-03
MXPA05004953A (es) 2005-08-19
TW200423563A (en) 2004-11-01
KR20050073621A (ko) 2005-07-14
RU2005117162A (ru) 2006-01-20
US20080130731A1 (en) 2008-06-05

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

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B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2160 DE 29/05/2012.