A precise approach for computing channel soft information

Author

Qian, BeiBei ; Yao, Dongping ; Xiong, Lei

Author_Institution

State Key Lab. of Rail Traffic Control & Safety, Beijing Jiaotong Univ., Beijing, China

fYear

2009

fDate

27-29 Oct. 2009

Firstpage

531

Lastpage

534

Abstract

LDPC (low-density parity-check) codes have a good performance close to the Shannon limit. To make full error-correcting performance, soft information is used in iterative decoding algorithm. For different types of modulation, there are different expressions of channel soft information. In this paper, we propose approaches for computing channel soft information precisely for BPSK, QPSK, 16QAM, instead of approximation. Taking the example of CMMB standard, simulation of channel coding with channel soft information is done.

Keywords

channel coding; error correction codes; iterative decoding; parity check codes; quadrature amplitude modulation; quadrature phase shift keying; BPSK; CMMB standard; LDPC; QAM; QPSK; Shannon limit; channel coding; channel soft information computing; error correcting performance; iterative decoding; low-density parity-check codes; AWGN channels; Binary phase shift keying; Constellation diagram; Decoding; Laboratories; Parity check codes; Quadrature phase shift keying; Rails; Railway safety; Traffic control; CMMB; LDPC; channel soft information;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009 3rd IEEE International Symposium on

Conference_Location

Beijing

Print_ISBN

978-1-4244-4076-4

Type

conf

DOI

10.1109/MAPE.2009.5355835

Filename

5355835