Title :
Joint frame synchronization and belief propagation decoding for quasi-cyclic LDPC-coded system under pseudorandom noise disturbance
Author :
Chen, Zhixiong ; Yuan, Jinsha
Author_Institution :
Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Baoding, China
Abstract :
Because of the quasi-cyclic nature of Quasi-Cyclic LDPC (QC-LDPC) codes, there are ramps in the frame synchronization searching process. A pilotless code-aided frame synchronization algorithm joint with improved BP decoding for QC-LDPC coded system under PN disturbance to eliminate the ramps is proposed in this paper. Simulation results show the validity of the modified BP decoding algorithm and outstanding synchronization performance compared to the algorithm before improvement and hard decision frame synchronization proposed by Dong-U Lee.
Keywords :
belief networks; decoding; parity check codes; random noise; search problems; synchronisation; belief propagation decoding algorithm; joint frame synchronization search process; pseudorandom noise disturbance; quasi cyclic LDPC-coded system; Belief propagation; Communication system control; Control systems; Degradation; Hardware; Iterative algorithms; Iterative decoding; Parity check codes; Power engineering computing; Signal to noise ratio; BP decoding; PN code; Quasi-Cyclic LDPC code; code-aided; frame synchronization;
Conference_Titel :
Computing, Communication, Control, and Management, 2009. CCCM 2009. ISECS International Colloquium on
Conference_Location :
Sanya
Print_ISBN :
978-1-4244-4247-8
DOI :
10.1109/CCCM.2009.5267829
