Nonbinary LDPC-coded differential modulation with reduced-complexity decoding

In this paper, we apply q-ary LDPC codes to differential modulation systems, and study the design and performance of the resultant coded modulation systems. Two low-complexity joint detection-decoding methods for noncoherent demodulation are proposed, in which the hard-message-passing strategy is us...

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Bibliographic Details
Published in:IEEE International Conference on Communications in China workshops pp. 44 - 49
Main Authors: Minghua Li, Baoming Bai, Xiao Ma
Format: Conference Proceeding
Language:English
Published: IEEE 01.08.2013
Subjects:
Complexity theory
Decoding
Demodulation
Iterative decoding
Joints
ISSN:2377-8644
Online Access:Get full text
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Summary:In this paper, we apply q-ary LDPC codes to differential modulation systems, and study the design and performance of the resultant coded modulation systems. Two low-complexity joint detection-decoding methods for noncoherent demodulation are proposed, in which the hard-message-passing strategy is used for a joint factor graph. The first method is based on the joint detection-decoding algorithm introduced in [1]; and the second one is developed by combining trellis-based differential detection and the hard-decision-based decoding of nonbinary LDPC codes. The Max-Log-MAP algorithm with soft-in hard-out is used for the differential detection. Simulation results show that both methods offer acceptable performances with greatly reduced complexities.
ISSN:2377-8644
DOI:10.1109/ICCChina.2013.6671087