Optimum bit-mapping of TCH codes

Author

Cercas, Francisco ; Silva, Joo Carlos ; Souto, Nuno ; Dinis, Rui

Author_Institution

Dept. de Cienc. e Tecnol. da Informacao, ISCTE-IUL, Lisbon, Portugal

fYear

2009

fDate

9-11 Sept. 2009

Firstpage

92

Lastpage

96

Abstract

Recent studies have determined the performance of TCH(n,k) (Tomlinson, Cercas, Hughes) codes in different environments, namely for mobile satellite channels for which TCH codes of small length n (e.g. 16) present some advantages when compared with TCH codes of higher length (e.g. 256). However, the correlation characteristics of TCH codes of small length present some peaks that deteriorate its performance. In this paper we present a method to properly bit-map the incoming data bits to the code words so as to minimize this effect. The improvement in performance was obtained by simulation and is compared with previous known results.

Keywords

codes; matrix algebra; mobile satellite communication; wireless channels; B-TCH polynomial; TCH code; auto-correlation distribution; mobile satellite channel; optimum bit-mapping matrix; AWGN; Additive white noise; Autocorrelation; Bit error rate; Block codes; Decoding; Degradation; Hamming distance; Polynomials; Satellites; TCH codes; bit-mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Satellite and Space Communications, 2009. IWSSC 2009. International Workshop on

Conference_Location

Tuscany

Print_ISBN

978-1-4244-4384-0

Electronic_ISBN

978-1-4244-3559-3

Type

conf

DOI

10.1109/IWSSC.2009.5286417

Filename

5286417