Title :
Design of Optimal LDPC Code for the System of MDPSK Concatenated with LDPC Codes
Author :
Zhu Aimin ; Yao Senjie
Author_Institution :
Zhen Jiang Watercraft Coll., PLA, Zhenjiang
Abstract :
The combined demodulating and decoding algorithm of the system of M-ary Differential Phase-Shift Keying (MDPSK) concatenated with Low-Density Parity Check Codes in AWGN channels is analyzed in this paper. Concentrating on the above algorithm, we propose a design method of optimal LDPC code based on Extrinsic Information Transfer Chart. Meanwhile, as an example, degree distribution of LDPC code at a rate of one-half bit per channel is given for both MDPSK and pi/4 DQPSK system concatenated with Low-Density Parity Check Codes.
Keywords :
AWGN channels; decoding; demodulation; differential phase shift keying; parity check codes; AWGN channels; DQPSK system; M-ary differential phase shift keying system; MDPSK system; combined demodulating-decoding algorithm; extrinsic information transfer chart; low density parity check codes; low-density parity check codes; optimal LDPC code; AWGN channels; Algorithm design and analysis; Concatenated codes; Educational institutions; Iterative algorithms; Iterative decoding; Modulation coding; Parity check codes; Probability density function; Programmable logic arrays; Degree Distribution; Extrinsic Information Transfer Chart; Low-Density Parity Check (LDPC) codes; MDPSK;
Conference_Titel :
Communication Software and Networks, 2009. ICCSN '09. International Conference on
Conference_Location :
Macau
Print_ISBN :
978-0-7695-3522-7
DOI :
10.1109/ICCSN.2009.20
