Title :
An improved quasi-cyclic low-density parity-check code for memory channels
Author :
Jayabalan, Muruganandam ; Kwon, Hyuck M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wichita State Univ., KS, USA
Abstract :
This paper presents an improved construction of circulant sub-matrices based quasi-cyclic low density parity check codes (QC-LDPC) under fading channels. The proposed construction yields a performance gain of about 2 to 5 dB at a 10-4 bit error rate (BER). This paper also proposes a decoding method to reduce the implementation complexity in the belief propagation algorithm. Furthermore, this paper studies the performance of circulant sub-matrices based QC-LDPC codes at higher rates under AWGN and fading channels.
Keywords :
AWGN channels; error statistics; fading channels; iterative decoding; parity check codes; sparse matrices; AWGN channels; BER; QC-LDPC; belief propagation decoding algorithm; bit error rate; fading channels; memory channels; quasi-cyclic low-density parity-check codes; soft decision iterative decoding; sparse circulant sub-matrices; AWGN; Belief propagation; Bit error rate; Fading; Iterative algorithms; Iterative decoding; Parity check codes; Performance gain; Power generation; Turbo codes;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1400515
