A normalized LLR soft information demapping method in DTMB system

Author

Song, Linqi ; Wang, Jun ; Pan, Changyong ; Fu, Jian

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

fYear

2008

fDate

19-21 Nov. 2008

Firstpage

1297

Lastpage

1301

Abstract

This paper presents a normalized demapping method with application to the digital terrestrial multimedia broadcasting (DTMB) system. Normalized logarithm likelihood ratio (NLLR) soft information is computed using this new method in which a normalization factor is proposed. Two ways of determining this factor are illustrated and simulation results show that it performs well with comparison to other factors under 16QAM constellation in additive white gaussian noise (AWGN) and fading channels respectively.

Keywords

digital television; iterative decoding; multimedia communication; parity check codes; statistical distributions; television broadcasting; LDPC iterative decoding; digital television broadcasting standard; digital terrestrial multimedia broadcasting system; logarithm likelihood ratio; normalization factor; normalized LLR soft information demapping method; statistical method; AWGN; Computational modeling; Concatenated codes; Forward error correction; Iterative decoding; Laboratories; Modulation coding; Parity check codes; Signal processing; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Systems, 2008. ICCS 2008. 11th IEEE Singapore International Conference on

Conference_Location

Guangzhou

Print_ISBN

978-1-4244-2423-8

Electronic_ISBN

978-1-4244-2424-5

Type

conf

DOI

10.1109/ICCS.2008.4737392

Filename

4737392