A low-complexity joint noncoherent demodulation/decoding algorithm for nonbinary LDPC-coded differential modulation systems

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. A low-complexity joint detection/decoding method for noncoherent demodulation is proposed, in which the hard-message-passing strategy is used f...

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Veröffentlicht in:2013 IEEE China Summit and International Conference on Signal and Information Processing (ChinaSIP) S. 403 - 407
Hauptverfasser: Minghua Li, Rongting Chen, Baoming Bai, Xiao Ma
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: IEEE 01.07.2013
Schlagworte:
Complexity theory
Decoding
Demodulation
Iterative decoding
Joints
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Zusammenfassung: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. A low-complexity joint detection/decoding method for noncoherent demodulation is proposed, in which the hard-message-passing strategy is used for a joint factor graph. It combines trellis-based differential detection aided with channel prediction and the reliability-based decoding of nonbinary LDPC codes introduced in [1]. The Max-Log-MAP algorithm with soft-in hard-out is used for the differential detection. Simulation results show that the proposed method can offer good performances with a greatly reduced complexity.
DOI:10.1109/ChinaSIP.2013.6625370