Title :
Discrete channel models for evaluation of error control strategies in CDMA
Author :
Nefedov, Nikolai
Author_Institution :
Nokia Group, Nokia Res. Center, Finland
Abstract :
We present a method to build discrete channel (DC) models that speed up simulations and facilitates analysis of error control strategies. This method is based on nested hidden Markov models (HMM) and takes into account soft decision outputs. The verification of DC model made by simulations of wide-band DS-CDMA (WCDMA) traffic confirmed the validity of suggested approach. Realistic DC models based on nested HMM are built for different coding and interleaving schemes evaluation. At the same time these models provide the basis for different FEC-ARQ schemes studies
Keywords :
cellular radio; code division multiple access; error correction codes; forward error correction; hidden Markov models; interleaved codes; spread spectrum communication; telecommunication channels; telecommunication traffic; CDMA; FEC-ARQ schemes; GSM; WCDMA traffic; coding; discrete channel models; error control strategies; interleaving; nested HMM; nested hidden Markov models; simulations; soft decision outputs; wide-band DS-CDMA; Automatic repeat request; Error correction; Forward error correction; Hidden Markov models; Interleaved codes; Land mobile radio; Multiaccess communication; Physical layer; Traffic control; Wideband;
Conference_Titel :
Spread Spectrum Techniques and Applications, 1998. Proceedings., 1998 IEEE 5th International Symposium on
Conference_Location :
Sun City
Print_ISBN :
0-7803-4281-X
DOI :
10.1109/ISSSTA.1998.726235
