Title :
Concatenated non-binary LDPC codes with modulation diversity: Rate design
Author :
Fan, Xiang ; Shi, Zhiping ; Zhenzhou Ma ; Zhang, Zhongpei
Author_Institution :
Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol., Chengdu, China
Abstract :
This paper presents a scheme of concatenated non-binary LDPC codes with modulation diversity (MD) based on rate match. The rate design of non-binary LDPC codes and MD is studied when overall rate is unchanged for the communication system. And in the receiver, an iterative method is proposed between decoding and detection. It is shown that the rate-optimized concatenated scheme over a fading channel may lead to a significant gain over the conventional design of non-binary LDPC codes and modulation diversity. And the rate optimized concatenated scheme can achieve 1.5 dB gains when bit error rate is equal to 10-3 with low total rate.
Keywords :
channel coding; concatenated codes; diversity reception; fading channels; iterative decoding; modulation coding; parity check codes; concatenated nonbinary LDPC code; fading channel; iterative decoding; iterative detection; modulation diversity; rate match design; rate-optimized concatenated scheme; wireless communication system; AWGN channels; Concatenated codes; Constellation diagram; Fading; Iterative decoding; Iterative methods; Laboratories; Mobile communication; Modulation coding; Parity check codes;
Conference_Titel :
Communications, Circuits and Systems, 2009. ICCCAS 2009. International Conference on
Conference_Location :
Milpitas, CA
Print_ISBN :
978-1-4244-4886-9
Electronic_ISBN :
978-1-4244-4888-3
DOI :
10.1109/ICCCAS.2009.5250559
