Title :
EXIT-chart-based LDPC code design for spatial modulation
Author :
Hong Liu ; Jianping Zheng ; Jinfang Dou ; Baoming Bai
Author_Institution :
State Key Lab. of Integrated Service Networks, Xidian Univ., Xi´an, China
Abstract :
The low-density parity-check (LDPC) code optimization for spatial modulation (SM) is studied using the extrinsic information transfer (EXIT) chart technique. First, for the maximum a posteriori probability (MAP) detector of the SM, its EXIT chart is characterized through Monte Carlo simulations. Then, the optimized degree distribution is acquired by matching the check node decoder curve to the combined detector and variable node decoder curve. Simulation results show that these optimized codes have performance gains from 0.3 to 1.3 dB, compared with the regular code and the optimized code for the additive Gaussian white noise channel, in 4×4 and 16×16 multiple-antenna systems.
Keywords :
AWGN channels; Monte Carlo methods; antenna arrays; maximum likelihood estimation; modulation; parity check codes; LDPC; MAP; Monte Carlo simulations; additive Gaussian white noise channel; extrinsic information transfer; low density parity check codes; maximum a posteriori probability detector; multiple-antenna systems; spatial modulation; AWGN channels; Bit error rate; Decoding; Detectors; Modulation; Parity check codes; Transmitting antennas;
Conference_Titel :
Information Science and Technology (ICIST), 2014 4th IEEE International Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/ICIST.2014.6920539
