Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Patent
1993-02-01
1998-10-06
Chin, Stephen
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
375341, 375262, 329304, H03D 100
Patent
active
058188762
ABSTRACT:
A method is provided of updating an estimated channel impulse response of a maximum likelihood sequence estimator within a radio receiver (12 and 13). The method includes the steps of computing a rate of change of a channel impulse response from a current estimated channel impulse response and a previous estimated channel impulse response, selecting an update step size as a function of the rate of change of the estimated channel impulse response, and updating the estimated channel impulse response of the maximum likelihood sequence estimator based upon the selected step size. Apparatus is also provided of practicing the method in receiving and decoding a signal.
REFERENCES:
patent: 5111481 (1992-05-01), Chen et al.
patent: 5263033 (1993-11-01), Seshadri
patent: 5272727 (1993-12-01), Okanoue
patent: 5285480 (1994-02-01), Chennakeshu et al.
J.J. Shynk et al. "The LMS Algorith With Momentum Updating", 1988 IEEE International Symposium on Circuits & Systems, Jun. 1988 pp. 2651-2654.
S. Roy et al. "Analysis of the Momentum LMS Algorithm", IEEE Transactions on Acoustics, Speech & Signal Processing, vol. 38, Iss 12 pp. 2088-2098.
Chin Stephen
Motorola Inc.
Webster Bryan
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