Title :
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
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;
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
DOI :
10.1109/IWSSC.2009.5286417
