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Noncoherent detection of factor-graph codes over fading channels
Written by:
Rong-Rong Chen,
Dakshi Agrawal,
and
Upamanyu Madhow.
Citation:
Proceedings of 34th Conference on Information Sciences and Systems
(CISS), 2000.
Copyright © (2000) by IEEE. Permission to make digital or
hard copies of part or all of this work for personal or classroom use
is granted without fee provided that copies are not made or distributed
for profit. To copy otherwise, to republish, to post on servers, or to
redistribute to lists, requires prior specific permission and/or a fee.
Abstract:
In this paper, we consider noncoherent multi-symbol detection
of factor-graph codes over Rayleigh fading channels. We use block
diferential encoding together with a joint demodulation and iterative
decoding algorithm to eliminate the pilot overhead required for coherent
detection. Simulations using turbo codes and repeat-accumulate codes show
that as the length of the coherence interval increases, performance of the
proposed noncoherent detector approaches that of the coherent detector.
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