Hybrid constellation mapping for punctured-node LDPC

Author

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

Author_Institution

National Engineering Research Center of Digital Television, 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

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, Belgium

Type

conf

DOI

10.1109/BMSB.2015.7177200

Filename

7177200