Title :
Design of low-density parity-check codes for bandwidth efficient modulation
Author :
Hou, Jilei ; Siegel, Paul H. ; Milstein, Laurence B. ; Pfister, Henry D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California, San Diego, CA, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
We design low-density parity-check (LDPC) codes for bandwidth efficient modulation using a multilevel coding (MLC) technique. We develop a method to analyze the asymptotic performance of the LDPC codes using message-passing decoding at each level of the MLC scheme as the codeword length goes to infinity. Simulation of very large block size LDPC codes verifies the accuracy of the analytical results. We jointly optimize the code rates and code parameters of the LDPC codes at each level of the MLC scheme, and the asymptotic performance of the optimized irregular LDPC codes is very close to the channel capacity of the additive white Gaussian noise (AWGN) channel
Keywords :
AWGN channels; binary codes; channel capacity; channel coding; decoding; error correction codes; modulation coding; optimisation; phase shift keying; AWGN channel; Gray-mapped 8-PSK modulation; LDPC codes; MLC scheme; additive white Gaussian noise channel; asymptotic performance; bandwidth efficient modulation; channel capacity; coded modulation; low-density parity-check codes; message-passing decoding; multilevel coding technique; parallel independent decoding; AWGN; Additive white noise; Analytical models; Bandwidth; Channel capacity; Decoding; H infinity control; Modulation coding; Parity check codes; Performance analysis;
Conference_Titel :
Information Theory Workshop, 2001. Proceedings. 2001 IEEE
Conference_Location :
Cairns, Qld.
Print_ISBN :
0-7803-7119-4
DOI :
10.1109/ITW.2001.955124
