SG155910A1 - Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling - Google Patents

Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling

Info

Publication number
SG155910A1
SG155910A1 SG200906058-3A SG2009060583A SG155910A1 SG 155910 A1 SG155910 A1 SG 155910A1 SG 2009060583 A SG2009060583 A SG 2009060583A SG 155910 A1 SG155910 A1 SG 155910A1
Authority
SG
Singapore
Prior art keywords
band
tones
noise variance
wireless communications
log
Prior art date
Application number
SG200906058-3A
Other languages
English (en)
Inventor
June Namgoong
Hao Xu
Peter J Black
Srikant Jayaraman
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 SG155910A1 publication Critical patent/SG155910A1/en

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • H04L25/021—Estimation of channel covariance
    • 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
    • H04L27/2647—Arrangements specific to the receiver only

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Dc Digital Transmission (AREA)
SG200906058-3A 2004-09-17 2005-09-16 Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling SG155910A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61102804P 2004-09-17 2004-09-17
US11/047,347 US7672383B2 (en) 2004-09-17 2005-01-28 Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling

Publications (1)

Publication Number Publication Date
SG155910A1 true SG155910A1 (en) 2009-10-29

Family

ID=35519776

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200906058-3A SG155910A1 (en) 2004-09-17 2005-09-16 Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling

Country Status (23)

Country Link
US (2) US7672383B2 (pt)
EP (1) EP1792462B1 (pt)
JP (3) JP2008514124A (pt)
KR (1) KR100868834B1 (pt)
CN (1) CN102546507B (pt)
AT (1) ATE400957T1 (pt)
AU (2) AU2005287062C1 (pt)
BR (1) BRPI0515379A (pt)
CA (2) CA2730327A1 (pt)
DE (1) DE602005008082D1 (pt)
DK (1) DK1792462T3 (pt)
EC (1) ECSP077399A (pt)
ES (1) ES2308563T3 (pt)
IL (1) IL181901A (pt)
MX (1) MX2007003232A (pt)
MY (1) MY142379A (pt)
NO (1) NO20071739L (pt)
NZ (1) NZ553857A (pt)
PT (1) PT1792462E (pt)
RU (1) RU2346404C2 (pt)
SG (1) SG155910A1 (pt)
SI (1) SI1792462T1 (pt)
WO (1) WO2006034020A1 (pt)

Families Citing this family (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7672383B2 (en) * 2004-09-17 2010-03-02 Qualcomm Incorporated Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling
US8325863B2 (en) * 2004-10-12 2012-12-04 Qualcomm Incorporated Data detection and decoding with considerations for channel estimation errors due to guard subbands
US7653035B2 (en) * 2004-12-20 2010-01-26 Intel Corporation Interference rejection in wireless receivers
US8571132B2 (en) * 2004-12-22 2013-10-29 Qualcomm Incorporated Constrained hopping in wireless communication systems
US7848463B2 (en) * 2005-04-07 2010-12-07 Qualcomm Incorporated Adaptive time-filtering for channel estimation in OFDM system
US7564775B2 (en) 2005-04-29 2009-07-21 Qualcomm, Incorporated Timing control in orthogonal frequency division multiplex systems based on effective signal-to-noise ratio
KR100981552B1 (ko) * 2005-06-21 2010-09-10 삼성전자주식회사 주파수분할 다중접속 시스템에서 상향링크 파일롯의 송수신장치 및 방법
US20070036233A1 (en) * 2005-08-15 2007-02-15 Xiaoyong Yu Sampling of data streams and supporting methods and apparatus
TWI298588B (en) * 2005-11-01 2008-07-01 Silicon Integrated Sys Corp A diversity receiver
TWI291811B (en) * 2005-11-25 2007-12-21 Sunplus Technology Co Ltd Method for suppressing impulse noise and device thereof
CN102208972B (zh) 2006-04-17 2014-11-26 高通股份有限公司 用于无线通信的噪声估计的方法和装置
US7706297B1 (en) * 2006-05-19 2010-04-27 National Semiconductor Corporation System and method for providing real time signal to noise computation for a 100Mb Ethernet physical layer device
US7944996B2 (en) * 2006-06-07 2011-05-17 Panasonic Corporation OFDM reception device and OFDM receiver using the same
GB0614836D0 (en) * 2006-07-26 2006-09-06 Ttp Communications Ltd Soft decision processing
GB0615292D0 (en) * 2006-08-01 2006-09-06 Ttp Communications Ltd Signal evaluation and adjustment
TW200833041A (en) 2006-12-01 2008-08-01 Koninkl Philips Electronics Nv Improving performance in a time-frequency interleaved orthogonal frequency division multiplexing system
WO2008069392A2 (en) * 2006-12-07 2008-06-12 Electronics And Telecommunications Research Institute Method and apparatus for estimating noise variance
KR100874007B1 (ko) 2006-12-07 2008-12-17 한국전자통신연구원 잡음 분산 추정 방법 및 장치
US8054914B2 (en) * 2007-01-30 2011-11-08 Texas Instruments Incorporated Noise variance estimation
US8787499B2 (en) * 2007-03-27 2014-07-22 Qualcomm Incorporated Channel estimation with effective co-channel interference suppression
US20080239936A1 (en) * 2007-03-28 2008-10-02 Motorola, Inc. Method and apparatus for mitigating interference in multicarrier modulation systems
US8135098B2 (en) 2007-05-11 2012-03-13 Marvell World Trade Ltd. BICM decoding in the presence of co-channel interference
US8190092B1 (en) 2007-08-29 2012-05-29 Marvell International Ltd. Selecting modulation and coding scheme in the presence of interference
EP1993217B1 (en) * 2007-05-15 2013-08-14 Abilis Systems Sarl OFDM receiver and digital signal processor
CN101682497B (zh) 2007-06-08 2013-06-05 高通股份有限公司 单载波频分多址中对通信信道的分层调制
US8379778B2 (en) * 2007-06-28 2013-02-19 Qualcomm Incorporated Bursty interference suppression for communications receivers
US8243860B1 (en) 2007-07-18 2012-08-14 Marvell International Ltd. Co-channel interference cancellation with multiple receive antennas for BICM
US20090074101A1 (en) * 2007-09-17 2009-03-19 Apacewave Technologies Corporation Detection Performance in Communication Systems
ATE518318T1 (de) * 2007-11-19 2011-08-15 Alcatel Lucent Verfahren zur rückgewinnung eines bitstroms aus einem funksignal
JP2009130486A (ja) * 2007-11-21 2009-06-11 Sharp Corp 無線通信システムおよび受信装置
JP4875642B2 (ja) * 2008-02-27 2012-02-15 株式会社日立製作所 雑音電力推定装置及び方法
US8520747B2 (en) * 2008-03-20 2013-08-27 Qualcomm Incorporated Channel estimation in wireless systems with impulsive interference
US8477888B2 (en) 2008-06-24 2013-07-02 Qualcomm Incorporated Phase-noise resilient generation of a channel quality indicator
US20100040127A1 (en) * 2008-08-12 2010-02-18 Chao-Kai Wen Circuit configuration for data combining
KR101466907B1 (ko) 2008-09-11 2014-12-01 삼성전자주식회사 연판정 정보의 전송을 이용하는 데이터 통신 네트워크 및 통신 방법
US8320510B2 (en) * 2008-09-17 2012-11-27 Qualcomm Incorporated MMSE MIMO decoder using QR decomposition
US8605831B1 (en) * 2008-10-15 2013-12-10 Marvell International Ltd. Demodulation that accounts for channel estimation error
US8243836B2 (en) * 2008-12-17 2012-08-14 Electronics And Telecommunications Research Institute Channel estimation apparatus and method in mobile communication system having dispersed pilot
US9706599B1 (en) 2009-07-23 2017-07-11 Marvell International Ltd. Long wireless local area network (WLAN) packets with midambles
US9125133B2 (en) 2009-08-12 2015-09-01 Qualcomm Incorporated Method and apparatus for relay backhaul design in a wireless communication system
US9210622B2 (en) 2009-08-12 2015-12-08 Qualcomm Incorporated Method and apparatus for relay backhaul design in a wireless communication system
US8917799B2 (en) * 2009-10-27 2014-12-23 Maxlinear, Inc. Edge equalizer
KR101673180B1 (ko) * 2010-04-07 2016-11-16 삼성전자주식회사 무선통신 시스템에서 채널추정 장치 및 방법
US8942223B2 (en) * 2010-04-08 2015-01-27 Qualcomm Incorporated Interference cancelation using edge signals for synchronization signal detection
US8995589B1 (en) * 2010-11-17 2015-03-31 James Qiu Channel estimation in a pilot assisted OFDM system
US8554151B2 (en) 2010-12-03 2013-10-08 Qualcomm Incorporated Method and apparatus for data aided channel quality estimation
CN102624652B (zh) * 2011-01-27 2015-03-11 日电（中国）有限公司 Ldpc解码方法和装置及接收终端
EP2721758B1 (en) 2011-06-15 2020-01-01 Marvell World Trade Ltd. Low bandwidth phy for wlan
JP5845128B2 (ja) * 2012-03-29 2016-01-20 日本放送協会 受信装置及びプログラム
JP5937879B2 (ja) * 2012-04-25 2016-06-22 日本放送協会 受信装置及びプログラム
JP5952628B2 (ja) * 2012-04-25 2016-07-13 日本放送協会 受信装置及びプログラム
WO2013169201A2 (en) * 2012-05-11 2013-11-14 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for transmitting demodulation pilots in a multi antenna wireless communication system
US8767851B2 (en) * 2012-05-23 2014-07-01 Telefonaktiebolaget L M Ericsson (Publ) Multi-carrier/technology peak power reduction
GB2502556B (en) 2012-05-30 2017-08-02 Imagination Tech Ltd Noise variance estimation and interference detection
CN103685085B (zh) * 2012-09-04 2016-08-10 扬智电子科技(上海)有限公司 处理频域插值的方法及其频域插值器
US9252907B2 (en) 2012-09-14 2016-02-02 Qualcomm Incorporated Methods and apparatus for providing multi-antenna enhancements using multiple processing units
JP6029417B2 (ja) * 2012-10-29 2016-11-24 日本放送協会 受信装置及びプログラム
RU2565014C2 (ru) * 2013-11-19 2015-10-10 Открытое акционерное общество "Камчатский гидрофизический институт" (ОАО "КГФИ") Способ декодирования сигналов связи
KR20150117155A (ko) * 2014-04-09 2015-10-19 한국전자통신연구원 다중입력 다중출력 통신 시스템의 연판정 검출 방법 및 장치
US9686102B2 (en) * 2014-04-09 2017-06-20 Altiostar Networks, Inc. Sparse ordered iterative group multi-antenna channel estimation
KR20170018396A (ko) 2014-06-11 2017-02-17 마벨 월드 트레이드 리미티드 무선 통신 시스템에 대한 압축된 프리앰블
DE102014111735A1 (de) * 2014-08-18 2016-02-18 Intel IP Corporation Funkkommunikationseinrichtungen und Verfahren zum Steuern einer Funkkommunikationseinrichtung
US10128917B2 (en) * 2014-09-16 2018-11-13 Qualcomm Incorporated Systems and methods for tone plans for wireless communication networks
US9407300B2 (en) * 2014-10-15 2016-08-02 Qualcomm Incorporated Adjacent-channel interference and spur handling in wireless communications
US9509362B2 (en) * 2015-04-03 2016-11-29 Cavium, Inc. Method and apparatus for handling modified constellation mapping using a soft demapper
WO2016182136A1 (ko) * 2015-05-08 2016-11-17 엘지전자 주식회사 무선 통신 시스템에서 주파수 자원을 할당하는 방법 및 이를 사용한 기기
CN106998304B (zh) * 2016-01-22 2019-11-15 瑞昱半导体股份有限公司 无线通信的噪声变异量估测电路与方法
EP3270554B1 (en) * 2016-07-12 2019-03-20 Mitsubishi Electric R&D Centre Europe B.V. Channel estimation with coloured noise
JP6982985B2 (ja) * 2017-05-31 2021-12-17 日本放送協会 Ｏｆｄｍ受信装置
EP3635926B1 (en) 2017-06-09 2024-03-27 Marvell World Trade Ltd. Packets with midambles having compressed ofdm symbols
WO2019060407A1 (en) 2017-09-22 2019-03-28 Marvell World Trade Ltd. DETERMINING THE NUMBER OF MIDAMBULES IN A PACKET
CN109936403B (zh) * 2017-12-19 2022-02-15 成都鼎桥通信技术有限公司 多天线系统的同步与接收方法及接收设备
US10432272B1 (en) 2018-11-05 2019-10-01 XCOM Labs, Inc. Variable multiple-input multiple-output downlink user equipment
US10659112B1 (en) 2018-11-05 2020-05-19 XCOM Labs, Inc. User equipment assisted multiple-input multiple-output downlink configuration
US10756860B2 (en) 2018-11-05 2020-08-25 XCOM Labs, Inc. Distributed multiple-input multiple-output downlink configuration
US10812216B2 (en) 2018-11-05 2020-10-20 XCOM Labs, Inc. Cooperative multiple-input multiple-output downlink scheduling
US11290172B2 (en) 2018-11-27 2022-03-29 XCOM Labs, Inc. Non-coherent cooperative multiple-input multiple-output communications
US11063645B2 (en) 2018-12-18 2021-07-13 XCOM Labs, Inc. Methods of wirelessly communicating with a group of devices
US10756795B2 (en) 2018-12-18 2020-08-25 XCOM Labs, Inc. User equipment with cellular link and peer-to-peer link
US11330649B2 (en) 2019-01-25 2022-05-10 XCOM Labs, Inc. Methods and systems of multi-link peer-to-peer communications
US10756767B1 (en) 2019-02-05 2020-08-25 XCOM Labs, Inc. User equipment for wirelessly communicating cellular signal with another user equipment
US10735057B1 (en) 2019-04-29 2020-08-04 XCOM Labs, Inc. Uplink user equipment selection
US10686502B1 (en) 2019-04-29 2020-06-16 XCOM Labs, Inc. Downlink user equipment selection
US11411778B2 (en) 2019-07-12 2022-08-09 XCOM Labs, Inc. Time-division duplex multiple input multiple output calibration
US11411779B2 (en) 2020-03-31 2022-08-09 XCOM Labs, Inc. Reference signal channel estimation
CA3175361A1 (en) 2020-04-15 2021-10-21 Tamer Adel Kadous Wireless network multipoint association and diversity

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671923B1 (fr) * 1991-01-17 1993-04-16 France Etat Dispositif de demodulation coherente de donnees numeriques entrelacees en temps et en frequence, a estimation de la reponse frequentielle du canal de transmission et seuillage, et emetteur correspondant.
DE69707872T2 (de) * 1997-09-22 2002-04-25 Alcatel, Paris Verfahren und Vorrichtung zur Bestimmung eines Taktfehlers in einem Mehrträgerübertragungssystem
KR100314353B1 (ko) 1998-04-28 2001-12-28 전주범 직교분할대역수신시스템
JP3782237B2 (ja) 1998-06-18 2006-06-07 日本放送協会 Ｏｆｄｍ信号復調装置
EP1159790B1 (en) * 1999-03-10 2002-10-16 Nokia Corporation Estimation of doppler shift compensation in a mobile communication system
US6393257B1 (en) * 1999-04-29 2002-05-21 Qualcomm Incorporated Wireless communications receiver and decoder for receiving encoded transmissions, such as transmissions using turbo codes, and estimating channel conditions
JP2001203656A (ja) * 2000-01-20 2001-07-27 Matsushita Electric Ind Co Ltd 基地局装置及び伝播路推定方法
JP4362955B2 (ja) 2000-07-11 2009-11-11 ソニー株式会社 復調装置及び復調方法
US7418043B2 (en) * 2000-07-19 2008-08-26 Lot 41 Acquisition Foundation, Llc Software adaptable high performance multicarrier transmission protocol
KR100434473B1 (ko) * 2001-05-11 2004-06-05 삼성전자주식회사 직교주파수 분할 다중 시스템에서 채널 복호 장치 및 방법
JP2003051804A (ja) * 2001-08-07 2003-02-21 Toyota Central Res & Dev Lab Inc マルチキャリア復調方法及び復調装置
JP2003069531A (ja) 2001-08-23 2003-03-07 Mitsubishi Electric Corp 移動体通信システム、マルチキャリアｃｄｍａ送信装置およびマルチキャリアｃｄｍａ受信装置
US7039000B2 (en) * 2001-11-16 2006-05-02 Mitsubishi Electric Research Laboratories, Inc. Timing synchronization for OFDM-based wireless networks
JP3898970B2 (ja) * 2002-03-29 2007-03-28 ソフトバンクテレコム株式会社 チャネル推定方法
KR100447201B1 (ko) * 2002-08-01 2004-09-04 엘지전자 주식회사 채널 등화 장치 및 이를 이용한 디지털 ｔｖ 수신기
AU2003250416A1 (en) * 2002-08-13 2004-02-25 Koninklijke Philips Electronics N.V. Joint channel and noise variance estimation in a wideband ofdm system
KR100576010B1 (ko) * 2002-10-08 2006-05-02 삼성전자주식회사 직교주파수분할다중 통신시스템의 보호구간 삽입/제거장치 및 방법
JP4298320B2 (ja) * 2002-11-08 2009-07-15 富士通株式会社 Ｏｆｄｍ伝送方式における受信装置
AU2003212244A1 (en) 2003-02-14 2004-09-06 Docomo Communications Laboratories Europe Gmbh Two-dimensional channel estimation for multicarrier multiple input outpout communication systems
US9544860B2 (en) 2003-02-24 2017-01-10 Qualcomm Incorporated Pilot signals for use in multi-sector cells
US7305056B2 (en) * 2003-11-18 2007-12-04 Ibiquity Digital Corporation Coherent tracking for FM in-band on-channel receivers
US7701917B2 (en) * 2004-02-05 2010-04-20 Qualcomm Incorporated Channel estimation for a wireless communication system with multiple parallel data streams
US7672383B2 (en) * 2004-09-17 2010-03-02 Qualcomm Incorporated Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling

Also Published As

Publication number Publication date
BRPI0515379A (pt) 2008-07-22
JP2008514124A (ja) 2008-05-01
KR100868834B1 (ko) 2008-11-14
US20060062322A1 (en) 2006-03-23
NO20071739L (no) 2007-06-15
NZ553857A (en) 2010-09-30
CA2730327A1 (en) 2006-03-30
DK1792462T3 (da) 2008-11-03
JP5583652B2 (ja) 2014-09-03
CA2579512C (en) 2011-11-22
EP1792462B1 (en) 2008-07-09
RU2007114295A (ru) 2008-10-27
JP2012075144A (ja) 2012-04-12
US7672383B2 (en) 2010-03-02
AU2009243448A1 (en) 2009-12-24
AU2005287062B2 (en) 2009-10-08
AU2005287062C1 (en) 2010-04-29
US8126072B2 (en) 2012-02-28
ECSP077399A (es) 2007-05-30
IL181901A (en) 2011-10-31
IL181901A0 (en) 2007-07-04
DE602005008082D1 (de) 2008-08-21
CN102546507A (zh) 2012-07-04
MX2007003232A (es) 2007-05-16
AU2005287062A1 (en) 2006-03-30
WO2006034020A1 (en) 2006-03-30
CA2579512A1 (en) 2006-03-30
MY142379A (en) 2010-11-30
PT1792462E (pt) 2008-09-22
EP1792462A1 (en) 2007-06-06
KR20070053349A (ko) 2007-05-23
CN102546507B (zh) 2015-07-08
RU2346404C2 (ru) 2009-02-10
ES2308563T3 (es) 2008-12-01
SI1792462T1 (sl) 2008-12-31
US20100054371A1 (en) 2010-03-04
ATE400957T1 (de) 2008-07-15
JP2010252362A (ja) 2010-11-04

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