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

Volume

14

Issue

2

fYear

2010

fDate

2/1/2010 12:00:00 AM

Firstpage

184

Lastpage

186

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;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2010.02.091926

Filename

5403628