Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Patent
1994-02-02
1996-07-02
Tse, Young T.
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
375343, 375348, 371 43, H03D 100
Patent
active
055330665
ABSTRACT:
A sampling phase calculating part calculates a complex cross-correlation function; of a part corresponding to a training sequence of an equalizer of each sequence with respect to individual sample value sequences i of a reception signal y(t) which are sampled in a plurality of different sampling phases and selects a sampling phase where the absolute value of the complex cross-correlation functions is maximized, then selects a sampling phase .tau.s where the bit error rate is minimized according to a calculation based on the above selected sampling phase. A sampling processing part samples the reception signals y(t) in the sampling phase .tau.s for use in obtaining estimated values E of a transmission symbol sequence in a Viterbi algorithm processing part (130) and a transmission line estimating part (140), thereby to obtain a transmission symbol sequence with an improved bit error rate and higher accuracy.
REFERENCES:
patent: 3815028 (1974-06-01), Rabow
patent: 5121414 (1992-06-01), Levine et al.
patent: 5138632 (1992-08-01), Uchida
patent: 5263026 (1993-11-01), Parr et al.
patent: 5271042 (1993-12-01), Borth et al.
patent: 5444721 (1995-08-01), Okanoue et al.
Joshi et al, "Sequence Estimation Techniques for Digital Subscriber Loop Transmission with Crosstalk Interface", IEEE Trans of Comm. vol. 38 Iss. 9, Sep. 1990 pp. 1367-1374.
Gaudenzi et al, "Analysis of an All-Digital Maximum Likelihood Carrier Phase & Clock Timing Synchronizer for 8 psk Mod", IEEE Trans. on Coma, vol. 42, Iss. 2, Feb. 1994 pp. 773-782.
Jennison et al, "Maximum Likelihood Image Reconstruction From Fourier-Offset Data Using the Expectation-Maximization Algorithm", ICASSP '91 Acoastics, Speech & Signal Processing Conference, 1991, pp. all.
Shiino Haruhiro
Yamaguchi Norio
Luther William
OKI Electric Industry Co., Ltd.
Rabin Steven M.
Tse Young T.
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