WO1992008307A3 - Optimal demodulator using maximum a posteriori probability estimation - Google Patents

Optimal demodulator using maximum a posteriori probability estimation Download PDF

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Publication number
WO1992008307A3
WO1992008307A3 PCT/US1991/007819 US9107819W WO9208307A3 WO 1992008307 A3 WO1992008307 A3 WO 1992008307A3 US 9107819 W US9107819 W US 9107819W WO 9208307 A3 WO9208307 A3 WO 9208307A3
Authority
WO
WIPO (PCT)
Prior art keywords
amplifier
maximum
probability estimation
posteriori probability
inputs
Prior art date
Application number
PCT/US1991/007819
Other languages
French (fr)
Other versions
WO1992008307A2 (en
Inventor
Richard A Altes
Original Assignee
Chirp 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
Application filed by Chirp Corp filed Critical Chirp Corp
Priority to JP3518497A priority Critical patent/JPH06502519A/en
Publication of WO1992008307A2 publication Critical patent/WO1992008307A2/en
Publication of WO1992008307A3 publication Critical patent/WO1992008307A3/en

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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
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2338—Demodulator circuits; Receiver circuits using non-coherent demodulation using sampling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/156—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width
    • H04L27/1566—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width using synchronous sampling
    • 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
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/003—Correction of carrier offset at baseband only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0055—Closed loops single phase

Abstract

A system and method for angle demodulation comprising a network having a plurality of amplifiers, each amplifier having a plurality of inputs, a bias b and an output wherein a set of feedback lines are connected between a selected set of amplifier outputs and a selected set of amplifier inputs, and block processing means for iteratively setting each amplifier bias as a function of the difference between a predicted mean phase estimate Υm(jΘ) and a measured phase α(jΘ) at a time jΘ, where 1 « j « K for a K-sample data block and Θ is a sampling period of signal data y(jΘ).
PCT/US1991/007819 1990-11-01 1991-10-23 Optimal demodulator using maximum a posteriori probability estimation WO1992008307A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3518497A JPH06502519A (en) 1990-11-01 1991-10-23 Optimal demodulator with maximum a posteriori probability estimation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/607,582 US5303269A (en) 1990-11-01 1990-11-01 Optically maximum A posteriori demodulator
US607,582 1990-11-01

Publications (2)

Publication Number Publication Date
WO1992008307A2 WO1992008307A2 (en) 1992-05-14
WO1992008307A3 true WO1992008307A3 (en) 1992-07-09

Family

ID=24432900

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/007819 WO1992008307A2 (en) 1990-11-01 1991-10-23 Optimal demodulator using maximum a posteriori probability estimation

Country Status (5)

Country Link
US (3) US5303269A (en)
EP (1) EP0555348A1 (en)
JP (1) JPH06502519A (en)
CA (1) CA2094612A1 (en)
WO (1) WO1992008307A2 (en)

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US5303269A (en) * 1990-11-01 1994-04-12 Chirp Corporation Optically maximum A posteriori demodulator
US5590158A (en) * 1993-01-28 1996-12-31 Advantest Corporation Method and apparatus for estimating PSK modulated signals
US5703908A (en) * 1993-10-08 1997-12-30 Rutgers University Fixed reference shift keying modulation for mobile radio telecommunications
GB9417170D0 (en) * 1994-08-25 1994-10-12 Isis Innovation Non-linear filtering
US5576904A (en) * 1994-09-27 1996-11-19 Cirrus Logic, Inc. Timing gradient smoothing circuit in a synchronous read channel
US5960044A (en) * 1996-11-14 1999-09-28 Scientific-Atlanta, Inc. Apparatus and method for block phase estimation
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US6178316B1 (en) * 1997-04-29 2001-01-23 Meta-C Corporation Radio frequency modulation employing a periodic transformation system
US6351503B1 (en) * 1997-09-12 2002-02-26 Stanford Telecommunications, Inc. Threshold extension block phase estimator for quasi-coherent communications systems
US6104767A (en) * 1997-11-17 2000-08-15 Telefonaktiebolaget Lm Ericsson Method and apparatus for estimating a frequency offset
JP4169393B2 (en) * 1998-06-16 2008-10-22 アイコム株式会社 Angle demodulator
KR100300306B1 (en) * 1999-05-28 2001-09-26 윤종용 Apparatus and method for adaptive map channel decoding for time-varying channel in the wireless telecommunicaion system
US6400290B1 (en) * 1999-11-29 2002-06-04 Altera Corporation Normalization implementation for a logmap decoder
US6510015B2 (en) 1999-12-10 2003-01-21 Seagate Technology Llc Magnetic disc having physical servo patterns with a magnetic carrier, and method of making and using the same
GB2360179A (en) * 2000-03-07 2001-09-12 Ericsson Telefon Ab L M Receiver with an 'a posteriori' estimator to determine the position of a synchronisation sequence
US6938024B1 (en) * 2000-05-04 2005-08-30 Microsoft Corporation Transmitting information given constrained resources
US7130292B2 (en) * 2000-06-02 2006-10-31 Essex Corporation Optical processor enhanced receiver architecture (opera)
EP1249116B1 (en) * 2000-06-27 2006-12-27 Koninklijke Philips Electronics N.V. Detection and correction of phase jumps in a phase sequence
KR100377969B1 (en) * 2000-07-10 2003-03-29 이용환 Apparatus for Direct Sequence Spread Spectrum Receiver using Adaptive Channel Estimator
US6515272B1 (en) 2000-09-29 2003-02-04 Advanced Micro Devices, Inc. Method and apparatus for improving signal to noise ratio of an aerial image monitor
US6466614B1 (en) 2001-03-22 2002-10-15 Motorola, Inc. Method and apparatus for classifying a baseband signal
US6675126B2 (en) * 2001-03-27 2004-01-06 Kabushiki Kaisha Toyota Chuo Kenkyusho Method, computer program, and storage medium for estimating randomness of function of representative value of random variable by the use of gradient of same function
US6906305B2 (en) * 2002-01-08 2005-06-14 Brion Technologies, Inc. System and method for aerial image sensing
US6828542B2 (en) * 2002-06-07 2004-12-07 Brion Technologies, Inc. System and method for lithography process monitoring and control
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
US6807503B2 (en) * 2002-11-04 2004-10-19 Brion Technologies, Inc. Method and apparatus for monitoring integrated circuit fabrication
US7336750B1 (en) 2002-11-22 2008-02-26 Marvell International Ltd. Optimal one-shot phase and frequency estimation for timing acquisition
US6759297B1 (en) 2003-02-28 2004-07-06 Union Semiconductor Technology Corporatin Low temperature deposition of dielectric materials in magnetoresistive random access memory devices
US7215705B2 (en) * 2003-03-17 2007-05-08 Intel Corporation Reducing phase noise in phase-encoded communications signals
US7053355B2 (en) 2003-03-18 2006-05-30 Brion Technologies, Inc. System and method for lithography process monitoring and control
KR100760998B1 (en) * 2006-09-29 2007-09-21 한국전자통신연구원 Method and apparatus for optimizing codebook for quantized precoder by using steepest descent algorithm
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Citations (3)

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US4656648A (en) * 1983-05-09 1987-04-07 Robert Vallet Process for the noncoherent demodulation of a digital signal
US4660166A (en) * 1985-01-22 1987-04-21 Bell Telephone Laboratories, Incorporated Electronic network for collective decision based on large number of connections between signals
US4885757A (en) * 1987-06-01 1989-12-05 Texas Instruments Incorporated Digital adaptive receiver employing maximum-likelihood sequence estimation with neural networks

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Patent Citations (3)

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US4660166A (en) * 1985-01-22 1987-04-21 Bell Telephone Laboratories, Incorporated Electronic network for collective decision based on large number of connections between signals
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Also Published As

Publication number Publication date
WO1992008307A2 (en) 1992-05-14
JPH06502519A (en) 1994-03-17
US5303269A (en) 1994-04-12
CA2094612A1 (en) 1992-05-02
US5491724A (en) 1996-02-13
EP0555348A1 (en) 1993-08-18
US5619537A (en) 1997-04-08

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