Title :
Nonbinary LDPC-coded differential modulation: Performance and decoding algorithm
Author :
Minghua Li ; Baoming Bai ; Peiying Zhang ; Xiao Ma
Author_Institution :
State Key Lab. of ISN, Xidian Univ., Xi´an, China
Abstract :
This paper is concerned with the design and performance of nonbinary LDPC-coded differential 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.
Keywords :
combined source-channel coding; communication complexity; decoding; graph theory; parity check codes; telecommunication network reliability; trellis coded modulation; channel prediction; decoding algorithm; differential detection; hard-message-passing strategy; joint factor graph; low-complexity joint decoding method; low-complexity joint detection method; max-log-MAP algorithm; nonbinary LDPC-coded differential modulation systems; noncoherent demodulation; performance algorithm; reliability-based decoding; trellis-based differential detection; Complexity theory; Decoding; Demodulation; Iterative decoding; Joints;
Conference_Titel :
Information Theory Workshop (ITW), 2013 IEEE
Conference_Location :
Sevilla
Print_ISBN :
978-1-4799-1321-3
DOI :
10.1109/ITW.2013.6691249