DE60140675D1 - Bestimmung der verbindungsqualität eines übertragu - Google Patents

Bestimmung der verbindungsqualität eines übertragu

Info

Publication number
DE60140675D1
DE60140675D1 DE60140675T DE60140675T DE60140675D1 DE 60140675 D1 DE60140675 D1 DE 60140675D1 DE 60140675 T DE60140675 T DE 60140675T DE 60140675 T DE60140675 T DE 60140675T DE 60140675 D1 DE60140675 D1 DE 60140675D1
Authority
DE
Germany
Prior art keywords
link quality
det
determination unit
link
transmission
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.)
Expired - Lifetime
Application number
DE60140675T
Other languages
English (en)
Inventor
Peter Schramm
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of DE60140675D1 publication Critical patent/DE60140675D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • H04L1/208—Arrangements for detecting or preventing errors in the information received using signal quality detector involving signal re-encoding
    • 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
    • H04L25/0204—Channel estimation of multiple channels
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
DE60140675T 2000-07-25 2001-07-25 Bestimmung der verbindungsqualität eines übertragu Expired - Lifetime DE60140675D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00115037A EP1176750A1 (de) 2000-07-25 2000-07-25 Bestimmung der Verbindungsqualität eines Übertragungskanals in einem OFDM-Übertragungssystem
PCT/EP2001/008612 WO2002009343A1 (en) 2000-07-25 2001-07-25 Link quality determination of a transmission link in an ofdm transmission system

Publications (1)

Publication Number Publication Date
DE60140675D1 true DE60140675D1 (de) 2010-01-14

Family

ID=8169231

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60140675T Expired - Lifetime DE60140675D1 (de) 2000-07-25 2001-07-25 Bestimmung der verbindungsqualität eines übertragu

Country Status (8)

Country Link
US (1) US7187646B2 (de)
EP (2) EP1176750A1 (de)
JP (1) JP2004505498A (de)
AT (1) ATE450946T1 (de)
AU (1) AU2001282025A1 (de)
DE (1) DE60140675D1 (de)
ES (1) ES2337336T3 (de)
WO (1) WO2002009343A1 (de)

Families Citing this family (127)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6426971B1 (en) * 1999-09-13 2002-07-30 Qualcomm Incorporated System and method for accurately predicting signal to interference and noise ratio to improve communications system performance
US7298691B1 (en) * 2000-08-04 2007-11-20 Intellon Corporation Method and protocol to adapt each unique connection in a multi-node network to a maximum data rate
KR100354338B1 (ko) * 2000-10-17 2002-09-28 광주과학기술원 주파수 오프셋이 있는 직교 주파수 분할 다중화 시스템의평가 및 설계 방법
US8155176B2 (en) * 2001-08-10 2012-04-10 Adaptive Networks, Inc. Digital equalization process and mechanism
US6816470B2 (en) * 2001-09-18 2004-11-09 Interdigital Technology Corporation Method and apparatus for interference signal code power and noise variance estimation
US20030081696A1 (en) * 2001-10-29 2003-05-01 In-Kyung Kim System and method for estimating signal to noise ratio
SE524688C2 (sv) * 2001-12-06 2004-09-14 Ericsson Telefon Ab L M Metod och anordningar för att allokera kanal till en mobilstation i ett radiokommunikationssystem
BR0303345A (pt) 2002-04-15 2004-08-10 Matsushita Electric Ind Co Ltd Aparelho de recepção e método de recepção
US7418026B2 (en) 2002-05-09 2008-08-26 Sony United Kingdom Limited Receiver for a multi-carrier modulated symbol
GB2388500A (en) * 2002-05-09 2003-11-12 Sony Uk Ltd Noise burst estimation and cancellation in OFDM carriers
US7260054B2 (en) * 2002-05-30 2007-08-21 Denso Corporation SINR measurement method for OFDM communications systems
US7184713B2 (en) * 2002-06-20 2007-02-27 Qualcomm, Incorporated Rate control for multi-channel communication systems
US7352730B2 (en) 2002-08-13 2008-04-01 Koninklijke Philips Electronics N.V. Joint channel and noise variance estimation in a wideband OFDM system
US8194770B2 (en) 2002-08-27 2012-06-05 Qualcomm Incorporated Coded MIMO systems with selective channel inversion applied per eigenmode
US6941143B2 (en) * 2002-08-29 2005-09-06 Thomson Licensing, S.A. Automatic channel selection in a radio access network
US7957486B2 (en) * 2002-09-30 2011-06-07 Intel Corporation Transmission link adaptation
US8170513B2 (en) * 2002-10-25 2012-05-01 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US20040081131A1 (en) 2002-10-25 2004-04-29 Walton Jay Rod OFDM communication system with multiple OFDM symbol sizes
US7986742B2 (en) * 2002-10-25 2011-07-26 Qualcomm Incorporated Pilots for MIMO communication system
US8570988B2 (en) * 2002-10-25 2013-10-29 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US8218609B2 (en) * 2002-10-25 2012-07-10 Qualcomm Incorporated Closed-loop rate control for a multi-channel communication system
US8208364B2 (en) * 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US8134976B2 (en) 2002-10-25 2012-03-13 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US7324429B2 (en) 2002-10-25 2008-01-29 Qualcomm, Incorporated Multi-mode terminal in a wireless MIMO system
US8320301B2 (en) * 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US7002900B2 (en) * 2002-10-25 2006-02-21 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US8169944B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Random access for wireless multiple-access communication systems
EP1416688A1 (de) * 2002-10-31 2004-05-06 Motorola Inc. Iterative Kanalschätzung in Mehrträgerempfängern
US7471745B2 (en) 2002-11-26 2008-12-30 Texas Instruments Incorporated Method and apparatus for channel quality metric generation within a packet-based multicarrier modulation communication system
JP2004180309A (ja) * 2002-11-26 2004-06-24 Texas Instruments Inc パケット・ベースの複数キャリア変調通信システム内のチャネル品質メトリック発生の方法と装置
US7295517B2 (en) 2002-11-27 2007-11-13 Texas Instruments Incorporated Method and apparatus for channel quality metric generation within a packet-based multicarrier modulation communication system
KR100517237B1 (ko) * 2002-12-09 2005-09-27 한국전자통신연구원 직교 주파수 분할 다중화 무선 통신 시스템에서의채널품질 추정과 링크적응 방법 및 그 장치
US7342979B2 (en) 2002-12-09 2008-03-11 Broadcom Corporation Incremental redundancy support in a cellular wireless terminal having IR processing module
US7027539B2 (en) 2002-12-09 2006-04-11 Broadcom Corporation Pipeline architecture for multi-slot wireless link processing
EP1434381B1 (de) * 2002-12-23 2006-08-09 Mitsubishi Electric Information Technology Centre Europe B.V. Verfahren zur Verbindungsanpassung
US6996763B2 (en) * 2003-01-10 2006-02-07 Qualcomm Incorporated Operation of a forward link acknowledgement channel for the reverse link data
US7738848B2 (en) * 2003-01-14 2010-06-15 Interdigital Technology Corporation Received signal to noise indicator
JP4109556B2 (ja) * 2003-01-31 2008-07-02 松下電器産業株式会社 Ｏｆｄｍ信号の衝突位置検出装置、ｏｆｄｍ受信装置及びｏｆｄｍ信号の衝突位置検出方法及びｏｆｄｍ受信方法
US7532864B2 (en) * 2003-02-17 2009-05-12 Panasonic Corporation Noise power estimation method and noise power estimation device
US7155236B2 (en) * 2003-02-18 2006-12-26 Qualcomm Incorporated Scheduled and autonomous transmission and acknowledgement
US8150407B2 (en) * 2003-02-18 2012-04-03 Qualcomm Incorporated System and method for scheduling transmissions in a wireless communication system
US20040160922A1 (en) * 2003-02-18 2004-08-19 Sanjiv Nanda Method and apparatus for controlling data rate of a reverse link in a communication system
US8391249B2 (en) * 2003-02-18 2013-03-05 Qualcomm Incorporated Code division multiplexing commands on a code division multiplexed channel
US8023950B2 (en) 2003-02-18 2011-09-20 Qualcomm Incorporated Systems and methods for using selectable frame durations in a wireless communication system
US7660282B2 (en) * 2003-02-18 2010-02-09 Qualcomm Incorporated Congestion control in a wireless data network
US8081598B2 (en) * 2003-02-18 2011-12-20 Qualcomm Incorporated Outer-loop power control for wireless communication systems
US7286846B2 (en) * 2003-02-18 2007-10-23 Qualcomm, Incorporated Systems and methods for performing outer loop power control in wireless communication systems
US7215930B2 (en) * 2003-03-06 2007-05-08 Qualcomm, Incorporated Method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication
US8705588B2 (en) 2003-03-06 2014-04-22 Qualcomm Incorporated Systems and methods for using code space in spread-spectrum communications
WO2004084479A1 (en) * 2003-03-17 2004-09-30 Telefonaktiebolaget Lm Ericsson (Publ) Dual loop signal quality based link adaptation
US20040218519A1 (en) * 2003-05-01 2004-11-04 Rong-Liang Chiou Apparatus and method for estimation of channel state information in OFDM receivers
US8477592B2 (en) * 2003-05-14 2013-07-02 Qualcomm Incorporated Interference and noise estimation in an OFDM system
US8018902B2 (en) 2003-06-06 2011-09-13 Telefonaktiebolaget L M Ericsson (Publ) Methods and apparatus for channel quality indicator determination
WO2004109474A2 (en) * 2003-06-06 2004-12-16 Meshnetworks, Inc. System and method for characterizing the quality of a link in a wireless network
US7406139B2 (en) 2003-06-16 2008-07-29 Broadcom Corporation System and method to identify a modulation format of a data frame within a cellular wireless network
US7352720B2 (en) 2003-06-16 2008-04-01 Broadcom Corporation System and method to determine a bit error probability of received communications within a cellular wireless network
US7342956B2 (en) 2003-06-16 2008-03-11 Broadcom Corporation System and method to extract uplink status flag bits in a cellular wireless network
US7107080B2 (en) 2003-06-16 2006-09-12 Broadcom Corporation System and method to conduct idle mode paging channel monitoring within a cellular wireless network
US7068735B2 (en) 2003-06-16 2006-06-27 Broadcom Corp. System and method to perform DC compensation on a radio frequency burst in a cellular wireless network
US7107013B2 (en) * 2003-06-16 2006-09-12 Broadcom Corporation Cooperative link characterization and MCS selection by wireless terminal and network for improved system performance
CN100539482C (zh) * 2003-07-08 2009-09-09 上海贝尔阿尔卡特股份有限公司 正交频分复用系统中混合自动重传请求的合并方法及接收机
EP1499059B1 (de) * 2003-07-18 2011-07-06 Motorola Mobility, Inc. Verfahren und Vorrichtung zum Ermitteln der Verbindungsgüte in einen OFDM-Netzwerk
US7308052B2 (en) * 2003-07-31 2007-12-11 Matsushita Electrical Industrial Co., Ltd. Radio transmitter apparatus and modulation scheme selecting method
US8489949B2 (en) 2003-08-05 2013-07-16 Qualcomm Incorporated Combining grant, acknowledgement, and rate control commands
US20050059366A1 (en) * 2003-09-16 2005-03-17 Atheros Communications, Inc. Spur mitigation techniques
KR100566210B1 (ko) * 2003-09-22 2006-03-29 삼성전자주식회사 무선 통신 시스템에서 채널 할당 장치 및 방법
US7457379B2 (en) 2003-10-16 2008-11-25 Broadcom Corporation Adaptive multi-step combined DC offset compensation for EDGE 8-PSK
EP1531590A1 (de) * 2003-11-11 2005-05-18 STMicroelectronics Belgium N.V. Verfahren und Vorrichtung zur Kanalentzerrung unter Verwendung einer Schätzung der Länge der Kanalimpulsantwort
US9473269B2 (en) 2003-12-01 2016-10-18 Qualcomm Incorporated Method and apparatus for providing an efficient control channel structure in a wireless communication system
US7359727B2 (en) * 2003-12-16 2008-04-15 Intel Corporation Systems and methods for adjusting transmit power in wireless local area networks
US20050190800A1 (en) * 2003-12-17 2005-09-01 Intel Corporation Method and apparatus for estimating noise power per subcarrier in a multicarrier system
US7231559B2 (en) * 2003-12-17 2007-06-12 Sony Corporation Outage predictor for communication link
KR100587417B1 (ko) * 2003-12-22 2006-06-08 한국전자통신연구원 주파수 분할 다중화를 사용하는 무선통신 시스템에서의적응 송수신 장치 및 그 방법
US8369790B2 (en) 2003-12-30 2013-02-05 Intel Corporation Communication overhead reduction apparatus, systems, and methods
US7450489B2 (en) * 2003-12-30 2008-11-11 Intel Corporation Multiple-antenna communication systems and methods for communicating in wireless local area networks that include single-antenna communication devices
US7475299B1 (en) * 2004-02-06 2009-01-06 Cisco Technology Inc. Method and system for real-time bit error ratio determination
KR100800765B1 (ko) * 2004-05-27 2008-02-01 삼성전자주식회사 통신 시스템에서 ｃｉｎｒ 추정 장치 및 방법
DE102004029421A1 (de) * 2004-06-18 2006-01-05 Rohde & Schwarz Gmbh & Co. Kg Verfahren und Vorrichtung zur Bewertung der Güte eines Signals
TWI248742B (en) * 2004-08-23 2006-02-01 Realtek Semiconductor Corp Channel estimator and related method for smoothing channel responses of a multi-carrier system
KR100849330B1 (ko) 2004-09-02 2008-07-29 삼성전자주식회사 무선 통신 시스템에서 적응 송수신 장치 및 방법
US8144572B2 (en) * 2004-09-14 2012-03-27 Qualcomm Incorporated Detection and mitigation of interference and jammers in an OFDM system
EP1638211A1 (de) * 2004-09-16 2006-03-22 Dibcom Rauschimpulsverringerung
CN100372415C (zh) * 2004-09-30 2008-02-27 华为技术有限公司 正交频分复用系统中跨小区测量的方法
KR100710891B1 (ko) 2004-10-14 2007-04-27 송형규 차세대 휴대 인터넷에서의 적응형 다중 송수신 방법 및 그장치
US8498215B2 (en) * 2004-11-16 2013-07-30 Qualcomm Incorporated Open-loop rate control for a TDD communication system
US7433432B2 (en) * 2004-12-31 2008-10-07 Broadcom Corporation Adaptive detector for multiple-data-path systems
US8077782B2 (en) * 2005-01-11 2011-12-13 Sharp Kabushiki Kaisha Adaptive modulation control apparatus and wireless communication apparatus
WO2006098105A1 (ja) * 2005-03-17 2006-09-21 Sharp Kabushiki Kaisha 適応変調制御システムおよび無線通信装置
US8126065B2 (en) * 2005-03-23 2012-02-28 Sony Corporation Automatic power adjustment in powerline home network
US7466749B2 (en) 2005-05-12 2008-12-16 Qualcomm Incorporated Rate selection with margin sharing
US8971461B2 (en) * 2005-06-01 2015-03-03 Qualcomm Incorporated CQI and rank prediction for list sphere decoding and ML MIMO receivers
US7894818B2 (en) * 2005-06-15 2011-02-22 Samsung Electronics Co., Ltd. Apparatus and method for multiplexing broadcast and unicast traffic in a multi-carrier wireless network
US20070002724A1 (en) * 2005-06-15 2007-01-04 Samsung Electronics Co., Ltd. Apparatus and method for broadcast superposition and cancellation in a multi-carrier wireless network
US8358714B2 (en) * 2005-06-16 2013-01-22 Qualcomm Incorporated Coding and modulation for multiple data streams in a communication system
US7773681B2 (en) 2005-08-05 2010-08-10 Interdigital Technology Corporation Method and apparatus for estimating signal-to-noise ratio, noise power, and signal power
KR100668662B1 (ko) * 2005-08-19 2007-01-12 한국전자통신연구원 Ｏｆｄｍ에서 프리앰블을 이용하여 신호 대 간섭 및 잡음비율을 추정하는 방법 및 장치
US7826864B2 (en) * 2005-09-09 2010-11-02 M-Stack Limited Apparatus and method for power measurement summation in mobile telecommunications system user equipment
US20070070877A1 (en) * 2005-09-27 2007-03-29 Thomas Sun Modulation type determination for evaluation of transmitter performance
US7733968B2 (en) 2005-09-27 2010-06-08 Qualcomm Incorporated Evaluation of transmitter performance
JP4752523B2 (ja) * 2006-01-26 2011-08-17 ソニー株式会社 無線通信装置及び方法
US20070217441A1 (en) * 2006-03-20 2007-09-20 Sriram Mudulodu Method and system for estimating co-channel interference in a frame of a block transmission system
US7734303B2 (en) * 2006-04-12 2010-06-08 Qualcomm Incorporated Pilot modulation error ratio for evaluation of transmitter performance
US7835432B2 (en) * 2006-04-19 2010-11-16 Beceem Communications Inc Measuring noise power at wireless receivers using pilot symbol information
US8738056B2 (en) 2006-05-22 2014-05-27 Qualcomm Incorporation Signal acquisition in a wireless communication system
BRPI0712926B1 (pt) * 2006-06-13 2019-11-12 Qualcomm Inc estrutura de preâmbulo e aquisição para um sistema de comunicação sem fio
US8929353B2 (en) * 2007-05-09 2015-01-06 Qualcomm Incorporated Preamble structure and acquisition for a wireless communication system
JP4812567B2 (ja) * 2006-09-05 2011-11-09 京セラ株式会社 パイロット信号の割り当て方法およびそれを利用した無線装置
ZA200902271B (en) * 2006-10-26 2010-07-28 Ericsson Telefon Ab L M Robust and low-complexity combined signal power estimation for OFDM
US7907673B2 (en) * 2006-10-26 2011-03-15 Telefonaktiebolaget L M Ericsson (Publ) Robust and low-complexity combined signal power estimation
US20080239936A1 (en) * 2007-03-28 2008-10-02 Motorola, Inc. Method and apparatus for mitigating interference in multicarrier modulation systems
US8620301B1 (en) * 2007-05-30 2013-12-31 Steven Ray Hessel Radiated wave measurement with supporting calibration
US8379778B2 (en) 2007-06-28 2013-02-19 Qualcomm Incorporated Bursty interference suppression for communications receivers
US7499515B1 (en) * 2007-08-27 2009-03-03 Harris Corporation System and method for automated link quality measurement for adaptive modulation systems using noise level estimates
WO2009119645A1 (ja) * 2008-03-25 2009-10-01 日本電気株式会社 Ｍｉｍｏ受信装置および方法
US8185073B2 (en) * 2008-04-15 2012-05-22 Nokia Corporation Noise/signal estimation for wireless systems
GR1006628B (el) * 2009-01-28 2009-12-11 Αριστοτελειο Πανεπιστημιο Θεσσαλονικης-Ειδικος Λογαριασμος Αξιοποιησης Κονδυλιων Ερευνας Μεθοδος και συστημα συνδυασμου σηματων με απουσια εκτιμησης κερδους καναλιων, για εφαρμογη σε δεκτες ασυρματων τηλεπικοινωνιακων συστηματων
WO2011040696A1 (ko) * 2009-09-29 2011-04-07 엘지전자 주식회사 무선 통신 시스템에서 데이터 송수신 방법 및 장치
FR2952253B1 (fr) * 2009-10-30 2011-11-18 Centre Nat Etd Spatiales Procede et dispositif d'evaluation d'une transmission numerique serie codee sur un canal non stationnaire
FR2952254B1 (fr) * 2009-10-30 2011-11-18 Centre Nat Etd Spatiales Procede de reception et recepteur pour transmission numerique serie codee sur un canal non stationnaire
KR101290959B1 (ko) * 2010-01-08 2013-07-30 파나소닉 주식회사 Ｏｆｄｍ 송신장치, ｏｆｄｍ 송신방법, ｏｆｄｍ 수신장치 및 ｏｆｄｍ 수신방법
AU2011207101B2 (en) * 2010-01-19 2014-07-17 Advanced Micro Devices, Inc. Estimation of signal to noise ratio in receivers
US20120170466A1 (en) * 2010-12-29 2012-07-05 National Chiao Tung University Joint subcarrier usage ratio and power allocation method, system using the same, base station and controller using the same
KR101294721B1 (ko) 2012-03-13 2013-08-16 한국기술교육대학교 산학협력단 긴훈련심볼과 짧은훈련심볼을 이용한 ｌｓ채널추정방법
US10461883B2 (en) 2016-06-21 2019-10-29 Nxp Usa, Inc. Communication link adjustments in wireless networks based upon composite LQI measurements
US11133887B2 (en) * 2019-10-11 2021-09-28 Itron Global Sarl Reliable link quality estimation in multi-rate networks
US11258534B2 (en) 2019-10-11 2022-02-22 Itron Global Sarl Reliable link quality estimation in multi-rate networks
US20220383881A1 (en) * 2021-05-27 2022-12-01 Qualcomm Incorporated Audio encoding based on link data

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59009441D1 (de) * 1990-03-06 1995-08-31 Siemens Ag Verfahren und Schaltungsanordnung zur Pegelüberwachung.
JPH04157817A (ja) * 1990-10-20 1992-05-29 Fujitsu Ltd 可変レート符号化装置
JPH08265184A (ja) * 1995-03-22 1996-10-11 Mitsubishi Electric Corp マルチキャリア変調方式用受信機
FR2742613B1 (fr) * 1995-12-14 1998-01-30 France Telecom Procede d'evaluation d'un facteur de qualite representatif d'un canal de transmission d'un signal numerique, et recepteur correspondant
JPH09321736A (ja) * 1996-05-27 1997-12-12 Sony Corp 受信方法及び受信装置
US5995483A (en) * 1996-08-22 1999-11-30 Tellabs Operations, Inc. Apparatus and method for upstream clock synchronization in a multi-point OFDM/DMT digital communication system
JP3066483B2 (ja) * 1997-03-04 2000-07-17 郵政省通信総合研究所長 ディジタル移動無線通信方法
US5867478A (en) * 1997-06-20 1999-02-02 Motorola, Inc. Synchronous coherent orthogonal frequency division multiplexing system, method, software and device
JP3559428B2 (ja) * 1997-06-26 2004-09-02 株式会社東芝 受信装置
US6108374A (en) * 1997-08-25 2000-08-22 Lucent Technologies, Inc. System and method for measuring channel quality information
JP3821331B2 (ja) * 1997-10-31 2006-09-13 ソニー株式会社 通信端末装置及びセルラー無線通信システム並びに情報通信方法
JPH11178050A (ja) * 1997-12-10 1999-07-02 Sony Corp 制御情報伝送方法及び送信装置並びに送受信装置
JPH11266224A (ja) * 1998-03-18 1999-09-28 Nippon Telegr & Teleph Corp <Ntt> 直交周波数多重通信装置
US6144710A (en) * 1998-04-23 2000-11-07 Lucent Technologies, Inc. Joint maximum likelihood sequence estimator with dynamic channel description
JP3319422B2 (ja) * 1998-05-08 2002-09-03 日本電気株式会社 マルチキャリア伝送システム、マルチキャリア伝送方法
JP4287536B2 (ja) * 1998-11-06 2009-07-01 パナソニック株式会社 Ｏｆｄｍ送受信装置及びｏｆｄｍ送受信方法
JP2000151641A (ja) * 1998-11-13 2000-05-30 Sony Corp 伝送制御方法及び伝送装置
JP2000165341A (ja) * 1998-11-20 2000-06-16 Nippon Telegr & Teleph Corp <Ntt> Ｏｆｄｍ用復調回路
US6456653B1 (en) * 1999-08-25 2002-09-24 Lucent Technologies Inc. Fast and accurate signal-to-noise ratio estimation technique for OFDM systems

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EP1176750A1 (de) 2002-01-30
US7187646B2 (en) 2007-03-06
ES2337336T3 (es) 2010-04-23
JP2004505498A (ja) 2004-02-19
EP1303937A1 (de) 2003-04-23
AU2001282025A1 (en) 2002-02-05
ATE450946T1 (de) 2009-12-15
US20020110138A1 (en) 2002-08-15
EP1303937B1 (de) 2009-12-02
WO2002009343A1 (en) 2002-01-31

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