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WO2003085845A3 - Low bias method for estimating small signal-to-noise ratio - Google Patents

Low bias method for estimating small signal-to-noise ratio Download PDF

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Publication number
WO2003085845A3
WO2003085845A3 PCT/US2003/010159 US0310159W WO03085845A3 WO 2003085845 A3 WO2003085845 A3 WO 2003085845A3 US 0310159 W US0310159 W US 0310159W WO 03085845 A3 WO03085845 A3 WO 03085845A3
Authority
WO
WIPO (PCT)
Prior art keywords
low bias
noise ratio
small signal
bias method
estimating
Prior art date
Application number
PCT/US2003/010159
Other languages
French (fr)
Other versions
WO2003085845A2 (en
Inventor
Bin Li
Robert A Difazio
Ariela Zeira
Original Assignee
Interdigital Tech Corp
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
Priority claimed from US10/269,606 external-priority patent/US6760370B2/en
Application filed by Interdigital Tech Corp filed Critical Interdigital Tech Corp
Priority to AU2003220645A priority Critical patent/AU2003220645A1/en
Publication of WO2003085845A2 publication Critical patent/WO2003085845A2/en
Publication of WO2003085845A3 publication Critical patent/WO2003085845A3/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

A method (100) is described for estimating signal-to-nose ration (SNR) using a method with low bias that is effective for both positive SNRs and small to negative SNRs. The method is based on an iterative solution for the maximum likelihood estimate of the amplitude from which the SNR can be computed. The method is applicable for various modulated systems, including BPSK, QPSK, and MPSK.
PCT/US2003/010159 2002-04-02 2003-04-01 Low bias method for estimating small signal-to-noise ratio WO2003085845A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003220645A AU2003220645A1 (en) 2002-04-02 2003-04-01 Low bias method for estimating small signal-to-noise ratio

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US36966502P 2002-04-02 2002-04-02
US60/369,665 2002-04-02
US10/269,606 US6760370B2 (en) 2002-04-03 2002-10-11 Low bias method for estimating small signal-to-noise ratio
US10/269,606 2002-10-11

Publications (2)

Publication Number Publication Date
WO2003085845A2 WO2003085845A2 (en) 2003-10-16
WO2003085845A3 true WO2003085845A3 (en) 2004-02-12

Family

ID=31498120

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/010159 WO2003085845A2 (en) 2002-04-02 2003-04-01 Low bias method for estimating small signal-to-noise ratio

Country Status (2)

Country Link
AU (1) AU2003220645A1 (en)
WO (1) WO2003085845A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100625686B1 (en) 2004-12-21 2006-09-20 한국전자통신연구원 A mobile terminal device capable of efficient CNIR measurement and a method for measuring CNIR in the device
RU188320U1 (en) * 2018-11-15 2019-04-08 Федеральное государственное бюджетное учреждение науки Институт прикладной астрономии Российской академии наук (ИПА РАН) DIGITAL DEVICE FOR ISOLATING NARROWBAND SIGNALS FROM WIDEBAND
CN113595943B (en) * 2021-07-29 2023-10-03 成都航空职业技术学院 Maximum likelihood-based MPSK signal-to-noise ratio estimation method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5870393A (en) * 1995-01-20 1999-02-09 Hitachi, Ltd. Spread spectrum communication system and transmission power control method therefor
US6442495B1 (en) * 1999-08-25 2002-08-27 Southwest Research Institute Average signal to noise ratio estimator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5870393A (en) * 1995-01-20 1999-02-09 Hitachi, Ltd. Spread spectrum communication system and transmission power control method therefor
US6442495B1 (en) * 1999-08-25 2002-08-27 Southwest Research Institute Average signal to noise ratio estimator

Also Published As

Publication number Publication date
AU2003220645A1 (en) 2003-10-20
WO2003085845A2 (en) 2003-10-16

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