Hybrid constellation mapping for punctured-node LDPC

Author

Yijun Shi ; Dazhi He ; Genning Zhang ; Yihang Huang ; Miao Zhao ; Yue Zhao ; Guangmin Wang ; Yunfeng Guan ; Yao Wang ; Wenjun Zhang

Author_Institution

Nat. Eng. Res. Center of Digital Telev., China

fYear

2015

fDate

17-19 June 2015

Firstpage

1

Lastpage

5

Abstract

Punctured-node LDPC can provide close-to-Shannon-limit waterfall performance and low error floor when carefully designed. In this paper, hybrid constellation mapping is proposed to improve performance of coding and modulation with punctured-node LDPC. General bit interleaving is performed over original puncture-node LDPC to obtain hybrid constellation mapping. By applying non-uniform constellation design methodology, the specific constellation is designed, under which the average mutual information (AMI) is approaching the capacity. Compared with punctured-node LDPC with BPSK modulation, hybrid constellation mapping can provide more than 0.2 dB gain in i.i.d Rayleigh channel according to simulation. Moreover, fewer number of iterations is needed in decoding algorithm of hybrid constellation mapping for punctured-node LDPC, which can reduce decoding complexity and power consumption at high SNR.

Keywords

Rayleigh channels; decoding; iterative methods; parity check codes; power consumption; telecommunication power management; AMI; average mutual information; decoding algorithm; decoding complexity; general bit interleaving; hybrid constellation mapping; i.i.d Rayleigh channel; iteration method; nonuniform constellation; power consumption; punctured-node LDPC; Binary phase shift keying; Bit error rate; Digital video broadcasting; Parity check codes; Rayleigh channels; Standards; AMI; NUC; hybrid constellation; punctured-node LDPC;

fLanguage

English

Publisher

ieee

Conference_Titel

Broadband Multimedia Systems and Broadcasting (BMSB), 2015 IEEE International Symposium on

Conference_Location

Ghent

Type

conf

DOI

10.1109/BMSB.2015.7177265

Filename

7177265