Title :
Bit-wise shortening of nonbinary LDPC codes using their binary images
Author :
Zhou, Lin ; Bai, Baoming ; Xu, Ming ; Chen, Chao
Author_Institution :
State Key Lab. of ISN, Xidian Univ., Xi´´an, China
Abstract :
Most of work on rate-compatible low-density parity-check (RC-LDPC) codes focus on binary codes. In this paper, we propose a construction of nonbinary RC-LDPC codes at short block length by using a bit-wise shortening method based on the algebraic properties of their binary images. All shortened information bits are carefully chosen according to the degree distributions of their binary images. Simulations show that a gain of around 1 dB is attained at the shortened code rate R = 1/5 over conventional symbol-wise shortening.
Keywords :
algebra; binary codes; parity check codes; algebraic properties; binary codes; binary images; bit-wise shortening; nonbinary LDPC codes; nonbinary RC-LDPC codes; rate-compatible low-density parity-check codes; short block length; Algorithm design and analysis; Binary codes; Bit error rate; Channel state information; Chaotic communication; Decoding; Error correction codes; Hamming distance; Parity check codes; Time-varying channels;
Conference_Titel :
Communications and Networking in China, 2009. ChinaCOM 2009. Fourth International Conference on
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4337-6
Electronic_ISBN :
978-1-4244-4337-6
DOI :
10.1109/CHINACOM.2009.5339905
