Title :
Usage of turbo TCH codes for spread spectrum applications
Author :
Silva, João Carlos ; Souto, Nuno ; Cercas, Francisco
Author_Institution :
Instituto de Telecomunicacoes, Portugal
fDate :
30 Aug.-2 Sept. 2004
Abstract :
The performance of turbo TCH codes is analyzed in a (code spreading) CS-CDMA scheme, for spread spectrum applications in a multiuser and fast fading channel environment, with and without multipath. Several rates are considered, bearing in mind different types of service. In order to get an estimate of performance gains over an existing (direct sequence) DS-CDMA system, UMTS coding results are used for comparison against punctured turbo TCH codes, in order to compare equal coding rates. A simulator with the main code structure for both schemes was built, alongside the channel model and RAKE receiver, in order to correctly compare both coding schemes. Specific test conditions are defined, and the overall codes of both schemes are compared.
Keywords :
3G mobile communication; channel coding; code division multiple access; fading channels; multipath channels; multiuser channels; spread spectrum communication; turbo codes; CS-CDMA; UMTS; code spreading; equal coding rates; fast fading channel; multipath channel; multiuser channel; performance; spread spectrum applications; turbo TCH codes; 3G mobile communication; Bandwidth; Convolution; Convolutional codes; Error correction codes; Fading; Multiaccess communication; Performance analysis; Spread spectrum communication; Turbo codes;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2004 IEEE Eighth International Symposium on
Print_ISBN :
0-7803-8408-3
DOI :
10.1109/ISSSTA.2004.1371780
