Title :
Construction of structured LDPC codes for AWGN and binary erasure channels
Author :
Tai, Y.Y. ; Lan, L. ; Zeng, L.-Q. ; Chen, L. ; Lin, S. ; Abdel-Ghaffar, K.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA
Abstract :
An algebraic method for constructing structured regular and irregular LDPC codes with girth at least six is presented. The parity check matrices of the proposed codes are arrays of permutation matrices obtained by decomposing Euclidean geometries. Masking is applied to the resultant parity check matrices to yield codes with various degree distributions. The proposed codes perform well over AWGN channels and binary erasure channels when decoded iteratively.
Keywords :
AWGN channels; binary codes; iterative decoding; matrix algebra; parity check codes; AWGN channels; Euclidean geometries; LDPC codes; binary erasure channels; iterative decoding; parity check matrices; permutation matrices; AWGN channels; Additive white noise; Gaussian noise; Geometry; Iterative decoding; Matrix decomposition; Null space; Parity check codes; Sparse matrices;
Conference_Titel :
Wireless Networks, Communications and Mobile Computing, 2005 International Conference on
Print_ISBN :
0-7803-9305-8
DOI :
10.1109/WIRLES.2005.1549400
