Title :
Analysis of the joint network LDPC codes over orthogonal multi-access relay channel
Author :
Li, Ying ; Song, Guanghui ; Wang, Lili
Author_Institution :
State Key Lab. of ISN, Xidian Univ., Xi´´an, China
fDate :
2/1/2010 12:00:00 AM
Abstract :
The capacity approaching behavior of the joint network LDPC code is analyzed in this paper. We first derive the upper bound of the sum capacity of the orthogonal multiaccess relay channel where two sources communicate with one destination in the presence of one relay. Then, a new generalized Gaussian approximation method is designed to predict the decoding threshold of the joint network LDPC code. Results show that under the symmetric channel, the gap between the upper bound of the sum capacity and the decoding threshold ranges from 0.3 dB to 0.6 dB.
Keywords :
Gaussian processes; decoding; multi-access systems; parity check codes; capacity approaching behavior; decoding threshold; generalized Gaussian approximation method; joint network LDPC codes; orthogonal multiaccess relay channel; sum capacity; symmetric channel; Broadcasting; Decoding; Design methodology; Design optimization; Diversity methods; Gaussian approximation; Parity check codes; Relays; Signal generators; Upper bound; Network LDPC code, multi-access relay network, sum rate, Gaussian approximation;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2010.02.091926
