A systolicarray structure for MTCM receivers
Abstract
Multiple trelliscoded modulation (MTCM) schemes, which represent a performance on the fading channels superior to the conventional trelliscoded modulated schemes, have a highly connected trellis diagram with parallel paths between states. Optimum detection of these schemes is achieved by the Viterbi algorithm (VA). For the schemes with a large number of states or parallel paths, this algorithm requires many computations during each symbol interval. Applications where the data rate is high necessitate a parallel processing implementation of the VA rather than the sequential solution. A highly concurrent implementation of the VA is proposed, based on systolic array processors for MTCM receivers. It is shown that the throughput rate gain of this systolic array decoder increases exponentially with the multiplicity of the MTCM schemes. This allows designing the MTCM schemes with higher multiplicities, with such schemes having more coding gain than the MTCM codes with smaller multiplicities.
 Publication:

Electrical and Computer Engineering, Volumes 1 and 2 4 p (SEE N9330215 1131)
 Pub Date:
 1990
 Bibcode:
 1990ecev.conf.....J
 Keywords:

 Decoding;
 Phase Modulation;
 Signal Encoding;
 Signal Processing;
 Systolic Arrays;
 Viterbi Decoders;
 Algorithms;
 Parallel Processing (Computers);
 Signal Fading;
 Electronics and Electrical Engineering