ITRM920475A1 - Sistema e metodo per calcolare il guadagno di canale e la varianza di rumore di un canale per comunicazioni. - Google Patents

Sistema e metodo per calcolare il guadagno di canale e la varianza di rumore di un canale per comunicazioni.

Info

Publication number
ITRM920475A1
ITRM920475A1 IT000475A ITRM920475A ITRM920475A1 IT RM920475 A1 ITRM920475 A1 IT RM920475A1 IT 000475 A IT000475 A IT 000475A IT RM920475 A ITRM920475 A IT RM920475A IT RM920475 A1 ITRM920475 A1 IT RM920475A1
Authority
IT
Italy
Prior art keywords
channel
calculating
noise variation
communication channel
channel gain
Prior art date
Application number
IT000475A
Other languages
English (en)
Inventor
Kevin L Baum
David E Borth
Bruce D Mueller
Phillip D Rasky
Eric H Winter
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of ITRM920475A0 publication Critical patent/ITRM920475A0/it
Publication of ITRM920475A1 publication Critical patent/ITRM920475A1/it
Application granted granted Critical
Publication of IT1254400B publication Critical patent/IT1254400B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • 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
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0845—Weighted combining per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch
    • 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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/067—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing soft decisions, i.e. decisions together with an estimate of reliability

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)
  • Radio Transmission System (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Analogue/Digital Conversion (AREA)
ITRM920475A 1991-07-02 1992-06-22 Sistema e metodo per calcolare il guadagno di canale e la varianza di rumore di un canale per comunicazioni IT1254400B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/724,663 US5214675A (en) 1991-07-02 1991-07-02 System and method for calculating channel gain and noise variance of a communication channel

Publications (3)

Publication Number Publication Date
ITRM920475A0 ITRM920475A0 (it) 1992-06-22
ITRM920475A1 true ITRM920475A1 (it) 1993-12-22
IT1254400B IT1254400B (it) 1995-09-14

Family

ID=24911346

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM920475A IT1254400B (it) 1991-07-02 1992-06-22 Sistema e metodo per calcolare il guadagno di canale e la varianza di rumore di un canale per comunicazioni

Country Status (13)

Country Link
US (2) US5214675A (it)
JP (1) JP3112029B2 (it)
KR (1) KR960012425B1 (it)
CN (1) CN1027213C (it)
AU (1) AU1919392A (it)
CA (1) CA2087520C (it)
DE (2) DE4292231T1 (it)
FR (1) FR2679085B1 (it)
GB (1) GB2263048B (it)
IT (1) IT1254400B (it)
MX (1) MX9203905A (it)
SE (1) SE502305C2 (it)
WO (1) WO1993001673A1 (it)

Families Citing this family (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2675968B1 (fr) * 1991-04-23 1994-02-04 France Telecom Procede de decodage d'un code convolutif a maximum de vraisemblance et ponderation des decisions, et decodeur correspondant.
US5351249A (en) * 1991-07-19 1994-09-27 Interdigital Technology Corporation Trellis coded FM digital communications system and method
JP2773562B2 (ja) * 1992-07-28 1998-07-09 日本電気株式会社 信号系列検出方法
JP2780576B2 (ja) * 1992-08-05 1998-07-30 日本電気株式会社 干渉波除去装置
US5546429A (en) * 1992-11-09 1996-08-13 Motorola, Inc. Frequency hopping code division multiple access radio communication unit
US5511119A (en) * 1993-02-10 1996-04-23 Bell Communications Research, Inc. Method and system for compensating for coupling between circuits of quaded cable in a telecommunication transmission system
CA2116736C (en) * 1993-03-05 1999-08-10 Edward M. Roney, Iv Decoder selection
US5357257A (en) * 1993-04-05 1994-10-18 General Electric Company Apparatus and method for equalizing channels in a multi-channel communication system
US5481570A (en) * 1993-10-20 1996-01-02 At&T Corp. Block radio and adaptive arrays for wireless systems
EP0682414B1 (en) * 1993-11-29 2001-11-21 Oki Electric Industry Company, Limited Device for estimating soft judgement value and device for estimating maximum likelihood system
FR2713421B1 (fr) * 1993-12-06 1996-01-19 Alcatel Business Systems Réseau local à transmission radio.
JP2699850B2 (ja) * 1993-12-28 1998-01-19 日本電気株式会社 復調装置
US5844951A (en) * 1994-06-10 1998-12-01 Northeastern University Method and apparatus for simultaneous beamforming and equalization
US5706313A (en) * 1994-11-01 1998-01-06 Motorola, Inc. Soft decision digital communication method and apparatus
FR2731571A1 (fr) * 1995-03-08 1996-09-13 Philips Electronique Lab Systeme de communication muni de moyens pour tester un canal de transmission et procede de test
CA2171922C (en) 1995-03-31 2001-12-11 Joseph Michael Nowack Decoder and method therefor
US5867539A (en) * 1995-07-21 1999-02-02 Hitachi America, Ltd. Methods and apparatus for reducing the effect of impulse noise on receivers
DE19527514C2 (de) * 1995-07-27 1999-04-22 Deutsch Zentr Luft & Raumfahrt Schnittstelle für die Schwingungsreduktion in strukturdynamischen Systemen
IL115476A0 (en) * 1995-10-01 1996-05-14 Geotek Communications Inc Apparatus and method for determining and using channel state information
JPH1065605A (ja) * 1996-08-23 1998-03-06 Sony Corp 受信方法、タイミング検出装置及び受信装置
US5960350A (en) * 1996-12-05 1999-09-28 Motorola, Inc. Method and system for optimizing a traffic channel in a wireless communications system
US5926507A (en) * 1997-07-08 1999-07-20 The United States Of America As Represented By The Secretary Of The Navy Quotient coding modem
DE19736626C1 (de) * 1997-08-22 1998-12-10 Siemens Ag Verfahren zur Datenübertragung in einem digitalen Übertragungssystem bei paketvermitteltem Dienst
DE19736676C1 (de) * 1997-08-22 1998-12-10 Siemens Ag Verfahren zur Paketübertragung mit einem ARQ-Protokoll auf Übertragungskanälen in einem digitalen Übertragungssystem
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
US20030112370A1 (en) * 2001-12-18 2003-06-19 Chris Long Adaptive expanded information capacity for communications systems
US6433835B1 (en) * 1998-04-17 2002-08-13 Encamera Sciences Corporation Expanded information capacity for existing communication transmission systems
US20030140351A1 (en) * 1998-04-17 2003-07-24 Hoarty W. Leo Cable television system compatible bandwidth upgrade using embedded digital channels
US7046653B2 (en) * 1998-05-01 2006-05-16 Jan Nigrin Diversity communication system and method of operation thereof
EP0993706B1 (en) * 1998-05-13 2008-04-16 Samsung Electronics Co., Ltd. Reception of both Time-Switched Transmission Diversity (TSTD) Signals and non-TSTD Signals
US6313786B1 (en) 1998-07-02 2001-11-06 Snaptrack, Inc. Method and apparatus for measurement processing of satellite positioning system (SPS) signals
US6643338B1 (en) * 1998-10-07 2003-11-04 Texas Instruments Incorporated Space time block coded transmit antenna diversity for WCDMA
DE69807535T2 (de) 1998-11-18 2003-04-24 Nokia Corp., Espoo Verfahren zur verbesserten schätzung der kanalimpulsantwort in tdma-systemen
EP1073214B1 (en) * 1999-02-16 2008-12-17 Mitsubishi Denki Kabushiki Kaisha Radio communication system, transmitter and receiver
DE19906865C2 (de) * 1999-02-18 2003-03-13 Infineon Technologies Ag Verfahren und Einrichtung zur Entzerrung und Decodierung eines Datensignals
WO2000077946A1 (en) * 1999-06-11 2000-12-21 Nokia Corporation Method and apparatus for performing interference estimation
BR0012560A (pt) 1999-07-20 2002-11-19 Qualcomm Inc Método para determinar uma mudança em um sinal de comunicação e uso desta informação para aprimorar recepção e processamento de sinal sps
WO2001008341A1 (en) * 1999-07-27 2001-02-01 Nokia Corporation A method for noise energy estimation
US7072414B1 (en) * 1999-09-07 2006-07-04 The Aerospace Corporation Gaussian minimum shift keying (GMSK) precoding communication method
US7085691B2 (en) * 1999-11-04 2006-08-01 Verticalband, Limited Reliable symbols as a means of improving the performance of information transmission systems
US7143013B2 (en) * 1999-11-04 2006-11-28 Verticalband, Limited Reliable symbols as a means of improving the performance of information transmission systems
US7110923B2 (en) * 1999-11-04 2006-09-19 Verticalband, Limited Fast, blind equalization techniques using reliable symbols
GB2356112B (en) * 1999-11-04 2002-02-06 Imperial College Increasing data transmission bit rates
US20020106040A1 (en) * 2001-02-02 2002-08-08 Sarnoff Corporation Method and apparatus for reducing multipath distortion in a wireless ian system
AU2001264906A1 (en) * 2000-05-22 2001-12-03 Sarnoff Corporation Method and apparatus for reducing multipath distortion in a wireless lan system
US6647015B2 (en) 2000-05-22 2003-11-11 Sarnoff Corporation Method and apparatus for providing a broadband, wireless, communications network
GB2365282B (en) * 2000-07-19 2004-02-11 Ericsson Telefon Ab L M Communications system
US6792055B1 (en) 2000-07-21 2004-09-14 Rockwell Collins Data communications receiver with automatic control of gain or threshold for soft decision decoding
FR2820911B1 (fr) * 2001-02-13 2003-05-30 Sagem Procede d'egalisation de symboles de donnees recus par un modem et modem pour la mise en oeuvre du procede
US7142595B1 (en) * 2001-04-12 2006-11-28 Conexant, Inc. System and method for decreasing cross-talk effects in time-domain-modulation (TDM) digital subscriber line (DSL) systems
US7263143B1 (en) * 2001-05-07 2007-08-28 Adaptix, Inc. System and method for statistically directing automatic gain control
GB0124321D0 (en) * 2001-10-10 2001-11-28 Nokia Corp Modulation determination
US7180942B2 (en) 2001-12-18 2007-02-20 Dotcast, Inc. Joint adaptive optimization of soft decision device and feedback equalizer
US20030219085A1 (en) * 2001-12-18 2003-11-27 Endres Thomas J. Self-initializing decision feedback equalizer with automatic gain control
US7653144B2 (en) * 2002-02-12 2010-01-26 British Telecommunications Public Limited Company Gaussian FSK modulation with more than two modulation states
US7136435B2 (en) * 2002-03-30 2006-11-14 Broadcom Corporation Modified branch metrics for processing soft decisions to account for phase noise impact on cluster variance
US20040013101A1 (en) * 2002-05-23 2004-01-22 Akin Huseyin C. Method and system for allocating power and scheduling packets in one or more cells of a wireless communication system or network
US6901083B2 (en) * 2002-10-25 2005-05-31 Qualcomm, Incorporated Method and system for code combining at an outer decoder on a communication system
EP1422896A1 (en) * 2002-11-22 2004-05-26 Telefonaktiebolaget LM Ericsson (publ) Calculation of soft decision values using reliability information of the amplitude
JP4382672B2 (ja) * 2002-11-22 2009-12-16 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 通信信号を復号する方法、装置およびデバイス
GB0227626D0 (en) * 2002-11-27 2003-01-08 Koninkl Philips Electronics Nv Low complexity equalizer for radio receiver
WO2004075469A2 (en) * 2003-02-19 2004-09-02 Dotcast Inc. Joint, adaptive control of equalization, synchronization, and gain in a digital communications receiver
GB2404822B (en) * 2003-08-07 2007-07-11 Ipwireless Inc Method and arrangement for noise variance and sir estimation
US7145966B2 (en) * 2004-06-30 2006-12-05 Qualcomm, Incorporated Signal quality estimation for continuous phase modulation
US8265209B2 (en) 2005-10-28 2012-09-11 Qualcomm Incorporated Method and apparatus for channel and noise estimation
US7634000B1 (en) 2006-05-22 2009-12-15 Redpine Signals, Inc. Noise estimator for a communications system
KR100788175B1 (ko) * 2006-08-23 2007-12-26 (주) 넥스트칩 세캄 색차 신호를 복원하기 위한 장치 및 그 방법
CN101155157B (zh) * 2006-09-30 2010-08-18 华为技术有限公司 基于变换域的信道估计结果处理方法与装置和接收机
US8295402B2 (en) * 2008-06-04 2012-10-23 Qualcomm Incorporated Optimal blind channel estimation for DQPSK demodulation
KR20090131230A (ko) 2008-06-17 2009-12-28 삼성전자주식회사 적어도 두 개의 주파수 대역들을 이용하는 저 밀도 패리티코드 인코딩 장치 및 디코딩 장치

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3659229A (en) * 1970-11-02 1972-04-25 Gen Electric System and method for automatic adaptive equalization of communication channels
US4495648A (en) * 1982-12-27 1985-01-22 At&T Bell Laboratories Transmitter power control circuit
DE3441644A1 (de) * 1984-11-14 1986-05-15 Siemens AG, 1000 Berlin und 8000 München Verfahren und anordnung zur ueberwachung von analogen und digitalen nachrichtenuebertragungseinrichtungen
US4868885A (en) * 1986-05-05 1989-09-19 General Electric Company Apparatus and method for high-speed determination of received RF signal strength indicator
CA1305768C (en) * 1987-11-16 1992-07-28 Masanobu Arai Digital signal receiving circuit with means for controlling a baud rate sampling phase by a power of sampled signals
GB2215567B (en) * 1988-03-05 1992-11-18 Plessey Co Plc Improvements in or relating to equalisers
CA2021232C (en) * 1989-07-17 1993-09-21 Hiroyasu Muto Diversity receiving system for use in digital radio communication with means for selecting branch by estimating propagation path property
SE465245B (sv) * 1989-12-22 1991-08-12 Ericsson Telefon Ab L M Foerfarande att utfoera kanalestimering foer en faedande kanal vid oeverfoering av symbolsekvenser
EP0449327B1 (en) * 1990-03-30 1998-07-15 Nec Corporation Noise-immune space diversity receiver
US5134635A (en) * 1990-07-30 1992-07-28 Motorola, Inc. Convolutional decoder using soft-decision decoding with channel state information
US5142551A (en) * 1991-02-28 1992-08-25 Motorola, Inc. Signal weighting system for digital receiver
US5233630A (en) * 1991-05-03 1993-08-03 Qualcomm Incorporated Method and apparatus for resolving phase ambiguities in trellis coded modulated data

Also Published As

Publication number Publication date
GB2263048B (en) 1996-02-28
KR930702842A (ko) 1993-09-09
FR2679085B1 (fr) 1996-08-02
IT1254400B (it) 1995-09-14
CN1027213C (zh) 1994-12-28
GB2263048A (en) 1993-07-07
MX9203905A (es) 1993-01-01
JPH06501366A (ja) 1994-02-10
SE9203808L (sv) 1993-01-03
FR2679085A1 (fr) 1993-01-15
US5214675A (en) 1993-05-25
CN1068228A (zh) 1993-01-20
CA2087520C (en) 1998-12-22
JP3112029B2 (ja) 2000-11-27
KR960012425B1 (ko) 1996-09-20
CA2087520A1 (en) 1993-01-03
GB9303638D0 (en) 1993-04-28
ITRM920475A0 (it) 1992-06-22
WO1993001673A1 (en) 1993-01-21
DE4292231T1 (de) 1993-10-07
SE9203808D0 (sv) 1992-12-18
AU1919392A (en) 1993-02-11
DE4292231C2 (de) 1995-11-16
US5379324A (en) 1995-01-03
SE502305C2 (sv) 1995-10-02

Similar Documents

Publication Publication Date Title
ITRM920475A1 (it) Sistema e metodo per calcolare il guadagno di canale e la varianza di rumore di un canale per comunicazioni.
ES2178296T3 (es) Un metodo para la estimacion mejorada de la respuesta de impulso de canal en sistemas tdma.
NO980871D0 (no) Fremgangsmåte for mottaking, samt mottaker
NO20015489L (no) Estimering av amplitude og fase i et stöybeheftet kommunikasjonssystem
WO2001039698A8 (en) Multipath and tracking error reduction method for spread-spectrum receivers
NO973865L (no) Fremgangsmåte for bestemmelse av forbindelseskvalitet, samt mottaker
EP0944201A3 (en) System and method for measuring channel quality in a communication system
WO1997024816A3 (en) A method for estimating signal and noise quality, and a receiver
WO2001047171A3 (en) Strong signal cancellation to enhance processing of weak spread spectrum signal
WO2002091012A3 (en) Altitude estimation system and method
MY120816A (en) Method, apparatus and system for determining a location of a frequency synchronization signal.
MY133639A (en) Method and system for non-orthogonal noise energy based gain control
CA2432956A1 (en) Interference power estimation for adaptive antenna system
EP1231722A3 (en) OFDM receiving device and method for beam forming with uneven beam width based on channel properties
DE69531214D1 (de) Verfahren und empfänger zur interferenzunterdrückung
ATE268079T1 (de) Verfahren und einrichtung zur entzerrung und dekodierung eines datensignals
WO2001043330A3 (en) Data rate estimation in a communication system
WO2001022673A3 (de) Verfahren zum senden von funksignalen und sender zum versenden von funksignalen
WO1998042155A3 (en) A method for combining signals, and a receiver
DK1173940T3 (da) Fremgangsmåde til kvalitetskontrol af digital radiotransmission i mellem- og kortbölgeområdet
MY104241A (en) Predictive agc in tdm systems
AU2772692A (en) Method of transmitting digitized stereophonic sound signals over radio channels subject to interference