Method and apparatus for path metric processing in...

Details Method and apparatus for path metric processing in... Method and apparatus for path metric processing in...

2006-03-28

2006-03-28

Fan, Chieh M. (Department: 2638)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S341000, C714S792000

Reexamination Certificate

active

07020214

ABSTRACT:
An apparatus and a method for calculating in-place pat metric addressing far a trellis processing arrangement are provided. An arrangement of cascaded multiplexers and stores receives a known input sequence of path metrics. The input sequence of path metrics is manipulated such that certain of the path metrics are delayed in the stores by a clock cycle, whilst the remaining path metrics are presented to the cascaded banks of multiplexers. In this manner, the input sequence of path metrics is continuously processed to produce a desired output sequence of path metrics. Advantageously, embodiments of the apparatus and method may be practiced on either a forward trellis or a reverse trellis.

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