Optimal Design of the Joint Network LDPC Codes for Half-Duplex Cooperative Multi-access Relay Channel

Author

Jingyi Wang ; Shuling Che ; Ying Li ; Junlong Wang

Author_Institution

State Key Lab. of ISN, Xidian Univ., Xi´an, China

fYear

2013

fDate

9-11 Sept. 2013

Firstpage

622

Lastpage

625

Abstract

Optimization of degree distribution of the joint network LDPC code for orthogonal multiple-access relay channel (MARC) is investigated in this paper. We first calculated the code capacity of the source-destination link of orthogonal MARC based on a Gaussian approximation, where two sources communicate with one destination in the presence of one relay. Then, a new generalized differential evolution algorithm is developed to iteratively improve the degree distribution of the joint network LDPC code. Simulation results show that, the gap between bit error rate (BER) performance of our designed codes and the decoding threshold is about 0.4dB, and that between the capacity limit and decoding threshold is less than 0.7dB at BER = 10^-6.

Keywords

Gaussian processes; approximation theory; error statistics; multi-access systems; parity check codes; telecommunication channels; BER performance; Gaussian approximation,where; bit error rate; capacity limit; decoding threshold; degree distribution optimization; generalized differential evolution algorithm; network LDPC codes; optimal design; orthogonal MARC; orthogonal multiaccess relay channel; source-destination link; Algorithm design and analysis; Bit error rate; Decoding; Iterative decoding; Joints; Relays; Gaussian approximation; Network LDPC Code; capacity limit; differential evolution; multi-access relay network;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Networking and Collaborative Systems (INCoS), 2013 5th International Conference on

Conference_Location

Xi´an

Type

conf

DOI

10.1109/INCoS.2013.116

Filename

6630499