Methods and apparatus for equalization and decoding of digital c

Details Methods and apparatus for equalization and decoding of digital c Methods and apparatus for equalization and decoding of digital c

1995-12-28

1999-01-19

Chin, Stephen

Pulse or digital communications

Receivers

Interference or noise reduction

375341, 375262, 375267, H04B 708, H04L 102, H04L 2706

Patent

active

058621920

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.

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