Channel estimation in a communication system

Details Channel estimation in a communication system Channel estimation in a communication system

1996-01-04

1997-11-11

Marcelo, Melvin

Pulse or digital communications

Receivers

Interference or noise reduction

375348, H04B 176

Patent

active

056871988

ABSTRACT:
A receiver (200, 400) implements improved channel estimation. The receiver (200, 400) demodulates a transmitted signal, and makes an initial channel estimate (115). The receiver (200, 400) then makes a hard decision (301) as to whether the channel estimate was correct and groups samples representing the decision. A vector sum of the group of samples is computed (302), and each sample is compared to the vector sum (303). The sample having the largest projection on the vector sum is retained (304), and the other samples are considered noise, and are thus discarded (305). After obtaining a predetermined number of retained samples (306), the retained samples are used to generate an new channel estimate (226). Since the noisy estimates are discarded, the new channel estimate (226) contains fewer errors than the initial channel estimate (115). The new channel estimate (226) is used to generate decoded data (250).

REFERENCES:
patent: 5136612 (1992-08-01), Bi
patent: 5440267 (1995-08-01), Tsuda et al.

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