Title :
Discrete channel models for wireless data services
Author :
Nefedov, Nikolai
Author_Institution :
Nokia Res. Center, Espoo, Finland
Abstract :
The evaluation of error control strategies for different wireless services implies the existence of models which can describe physical and data-link layers as a whole. In this paper a method of modelling of discrete channels (DC) is presented. This method is based on nested hidden Markov models and takes into consideration hard and soft decision outputs. It is shown that realistic DC models built for GSM radio channels (at bit level as well as at TDMA frame level) may have a relatively large number of channel states. DC model parameters for ARQ and hybrid FEC-ARQ schemes are presented
Keywords :
automatic repeat request; cellular radio; data communication; digital radio; forward error correction; hidden Markov models; telecommunication channels; time division multiple access; ARQ; DC models; GSM radio channels; TDMA frame level; channel states; data-link layers; discrete channel models; error control strategies; hard decision outputs; hybrid FEC-ARQ schemes; nested hidden Markov models; physical layers; soft decision outputs; wireless data services; Automatic repeat request; Delay; Error correction; Fading; Forward error correction; GSM; Hidden Markov models; Land mobile radio; Physical layer; Traffic control;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686663
