WO1997024816A3 - A method for estimating signal and noise quality, and a receiver - Google Patents

A method for estimating signal and noise quality, and a receiver Download PDF

Info

Publication number
WO1997024816A3
WO1997024816A3 PCT/FI1996/000700 FI9600700W WO9724816A3 WO 1997024816 A3 WO1997024816 A3 WO 1997024816A3 FI 9600700 W FI9600700 W FI 9600700W WO 9724816 A3 WO9724816 A3 WO 9724816A3
Authority
WO
WIPO (PCT)
Prior art keywords
receiver
signal
noise
estimate
ratio
Prior art date
Application number
PCT/FI1996/000700
Other languages
French (fr)
Other versions
WO1997024816A2 (en
Inventor
Qin Liu
Original Assignee
Nokia Telecommunications Oy
Qin Liu
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 Nokia Telecommunications Oy, Qin Liu filed Critical Nokia Telecommunications Oy
Priority to US08/913,068 priority Critical patent/US6137824A/en
Priority to EP96943149A priority patent/EP0812499B1/en
Priority to AU11977/97A priority patent/AU714343B2/en
Priority to AT96943149T priority patent/ATE244471T1/en
Priority to DE69628915T priority patent/DE69628915D1/en
Priority to JP9524049A priority patent/JPH11504188A/en
Publication of WO1997024816A2 publication Critical patent/WO1997024816A2/en
Publication of WO1997024816A3 publication Critical patent/WO1997024816A3/en
Priority to NO973959A priority patent/NO973959L/en

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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure
    • 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

Abstract

The invention relates to calculating an estimate (315) representing noise and signal quality, and to a receiver of a radio system. According to the method, the highest value (313) of a correlation vector (101-106) formed in a correlator (303) of the receiver is compared either to the second highest value (315) or to the mean value of the other values. If a specific spreading code is used in the reception of the signal, the comparison forms a ratio of the signal and disturbance, the ratio being applicable particularly to combining signals from the diversity branches (1 and 2) of a diversity receiver, whereby the method makes it possible to combine the signals even prior to detection. If the reception employs a spreading code with which no signal received by the receiver has been transmitted, it is possible by comparing the correlation values to form a noise quality estimate (315), an estimate value higher of which meaning that the receiver is receiving a signal and not just noise.
PCT/FI1996/000700 1995-12-29 1996-12-27 A method for estimating signal and noise quality, and a receiver WO1997024816A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US08/913,068 US6137824A (en) 1995-12-29 1996-12-27 Method for estimating signal and noise quality, and a receiver
EP96943149A EP0812499B1 (en) 1995-12-29 1996-12-27 A method for estimating signal and noise quality, and a receiver
AU11977/97A AU714343B2 (en) 1995-12-29 1996-12-27 A method for estimating signal and noise quality, and a receiver
AT96943149T ATE244471T1 (en) 1995-12-29 1996-12-27 METHOD FOR ESTIMATING SIGNAL AND NOISE QUALITY AND RECEIVER
DE69628915T DE69628915D1 (en) 1995-12-29 1996-12-27 METHOD FOR ESTIMATING SIGNAL AND NOISE QUALITY AND RECEIVER
JP9524049A JPH11504188A (en) 1995-12-29 1996-12-27 Method and receiver for estimating signal and noise quality
NO973959A NO973959L (en) 1995-12-29 1997-08-28 Procedure for estimating signal and noise quality, as well as receiver

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI956359A FI100041B (en) 1995-12-29 1995-12-29 Procedure for estimating signal and noise quality as well as receivers
FI956359 1995-12-29

Publications (2)

Publication Number Publication Date
WO1997024816A2 WO1997024816A2 (en) 1997-07-10
WO1997024816A3 true WO1997024816A3 (en) 1997-08-21

Family

ID=8544636

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1996/000700 WO1997024816A2 (en) 1995-12-29 1996-12-27 A method for estimating signal and noise quality, and a receiver

Country Status (10)

Country Link
US (1) US6137824A (en)
EP (1) EP0812499B1 (en)
JP (1) JPH11504188A (en)
CN (1) CN1084093C (en)
AT (1) ATE244471T1 (en)
AU (1) AU714343B2 (en)
DE (1) DE69628915D1 (en)
FI (1) FI100041B (en)
NO (1) NO973959L (en)
WO (1) WO1997024816A2 (en)

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* Cited by examiner, † Cited by third party
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FI956358A (en) * 1995-12-29 1997-06-30 Nokia Telecommunications Oy Method for detecting data transfer rate and receiver
US6694154B1 (en) * 1997-11-17 2004-02-17 Ericsson Inc. Method and apparatus for performing beam searching in a radio communication system
US6175587B1 (en) 1997-12-30 2001-01-16 Motorola, Inc. Communication device and method for interference suppression in a DS-CDMA system
FI112739B (en) 1998-05-25 2003-12-31 Nokia Corp Method and apparatus for detecting an interfering signal in a radio receiver
US6795580B1 (en) * 1998-09-10 2004-09-21 Tektronix, Inc. Picture quality measurement using blockiness
JP4557331B2 (en) * 1999-05-20 2010-10-06 キヤノン株式会社 Information processing apparatus, information processing system, operation control method, and computer-readable recording medium
US6714527B2 (en) * 1999-09-21 2004-03-30 Interdigital Techology Corporation Multiuser detector for variable spreading factors
MXPA02002819A (en) * 1999-09-21 2003-07-21 Interdigital Tech Corp Multiuser detector for variable spreading factors.
JP4316759B2 (en) * 2000-01-13 2009-08-19 株式会社日立国際電気 Path recognition method, CDMA wireless communication terminal, and CDMA wireless communication system
JP3805205B2 (en) * 2000-04-06 2006-08-02 株式会社エヌ・ティ・ティ・ドコモ Method and apparatus for measuring communication quality in CDMA cellular system
JP2002043990A (en) * 2000-07-21 2002-02-08 Mitsubishi Electric Corp Receiving device for wireless communication
US7177319B2 (en) * 2001-12-27 2007-02-13 Interdigital Technology Corporation Insertion sorter
US6947715B2 (en) * 2002-03-30 2005-09-20 Broadcom Corporation VOFDM receiver correlation matrix processing using factorization
JP4118599B2 (en) * 2002-05-20 2008-07-16 三菱電機株式会社 Diversity receiver and receiving method
US7190741B1 (en) 2002-10-21 2007-03-13 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Real-time signal-to-noise ratio (SNR) estimation for BPSK and QPSK modulation using the active communications channel
US6920193B2 (en) * 2002-12-19 2005-07-19 Texas Instruments Incorporated Wireless receiver using noise levels for combining signals having spatial diversity
US20070234178A1 (en) * 2003-02-26 2007-10-04 Qualcomm Incorporated Soft information scaling for interactive decoding
TWI244275B (en) * 2003-03-05 2005-11-21 Winbond Electronics Corp A rake receiver employable in multipath environment and method for mitigating the multipath interference
US7453900B2 (en) 2003-03-05 2008-11-18 Cisco Technology, Inc. System and method for monitoring noise associated with a communication link
US7437135B2 (en) 2003-10-30 2008-10-14 Interdigital Technology Corporation Joint channel equalizer interference canceller advanced receiver
US7400692B2 (en) 2004-01-14 2008-07-15 Interdigital Technology Corporation Telescoping window based equalization
EP1564650A1 (en) * 2004-02-17 2005-08-17 Deutsche Thomson-Brandt Gmbh Method and apparatus for transforming a digital audio signal and for inversely transforming a transformed digital audio signal
US7388929B2 (en) * 2004-07-29 2008-06-17 Interdigital Technology Corporation Method and apparatus for providing service availability information in a wireless communication system
US9402187B2 (en) 2009-06-30 2016-07-26 Nokia Technologies Oy Apparatus, method, computer program for communication and system thereof
CN102271008B (en) * 2011-07-28 2014-01-01 上海华为技术有限公司 Method and system for detecting channel noise
WO2013131966A2 (en) * 2012-03-06 2013-09-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Receiving stage and method for receiving
EP3949176A4 (en) 2019-03-26 2022-11-30 Telefonaktiebolaget LM Ericsson (publ) Method and system for determining signal quality indications

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995008876A1 (en) * 1993-09-24 1995-03-30 Nokia Telecommunications Oy Method and apparatus for controlling signal quality in a cdma cellular telecommunications system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5224122A (en) * 1992-06-29 1993-06-29 Motorola, Inc. Method and apparatus for canceling spread-spectrum noise
US5488629A (en) * 1993-02-17 1996-01-30 Matsushita Electric Industrial Co., Ltd. Signal processing circuit for spread spectrum communications
FI932605A (en) * 1993-06-07 1994-12-08 Nokia Telecommunications Oy Receiver device for base station
US5440597A (en) * 1993-11-23 1995-08-08 Nokia Mobile Phones Ltd. Double dwell maximum likelihood acquisition system with continuous decision making for CDMA and direct spread spectrum system
US5768307A (en) * 1996-09-13 1998-06-16 Telefonaktiebolaget Lm Ericsson Coherent demodulation with decision-directed channel estimation for digital communication

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995008876A1 (en) * 1993-09-24 1995-03-30 Nokia Telecommunications Oy Method and apparatus for controlling signal quality in a cdma cellular telecommunications system

Also Published As

Publication number Publication date
CN1084093C (en) 2002-05-01
EP0812499B1 (en) 2003-07-02
NO973959D0 (en) 1997-08-28
NO973959L (en) 1997-10-29
FI100041B (en) 1997-08-29
FI956359A (en) 1997-06-30
CN1179244A (en) 1998-04-15
EP0812499A2 (en) 1997-12-17
AU1197797A (en) 1997-07-28
US6137824A (en) 2000-10-24
WO1997024816A2 (en) 1997-07-10
FI956359A0 (en) 1995-12-29
JPH11504188A (en) 1999-04-06
AU714343B2 (en) 1999-12-23
DE69628915D1 (en) 2003-08-07
ATE244471T1 (en) 2003-07-15

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