Equalization and decoding for digital communication channel

Details Equalization and decoding for digital communication channel Equalization and decoding for digital communication channel

1995-11-17

1998-06-30

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375342, H03D 100

Patent

active

057745048

ABSTRACT:
An equalizer/decoder for a communication channel presenting impairments to error-free reception of transmitted symbols includes a modified Viterbi decoder operating on samples of received signals in a plurality of equivalent subchannels. Estimates of each of the subchannels are updated using a locally best estimate in the Viterbi trellis processing, thereby avoiding delay in updating channel estimates in a rapidly changing channel such as a digital cellular communications channels. A leaky predictor channel updating technique also proves advantageous in an alternative embodiment.

REFERENCES:
patent: 5191598 (1993-03-01), Backstrom et al.
patent: 5222101 (1993-06-01), Ariyavisitakul et al.
patent: 5479450 (1995-12-01), Okanoue et al.

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