DocumentCode :
3050710
Title :
Iterative multiuser detection of a multiple access FSK system
Author :
Arnold, Dieter M. ; Schlegel, Christian ; Perez, Lance C.
Author_Institution :
Signal & Inf. Process. Lab., Eidgenossische Tech. Hochschule, Zurich, Switzerland
fYear :
1997
fDate :
29 Jun-4 Jul 1997
Firstpage :
319
Abstract :
The performance of a collision frequency shift keying system (CFSK) multiple access system is investigated. In CFSK two or more users can simultaneously transmit the same frequency resulting in a collision. A new iterative consensus decoder, the maximum a posteriori consensus decoder, is formulated and the performance investigated in the presence of noise. In this decoder, each user uses a maximum a posteriori decoding algorithm to calculate the probability that they transmitted each of the frequencies. The resulting probability distributions are then shared among the users and refined by iteration. This decoder is based on the derivation of a metric for the noisy CFSK channel. Simulation results demonstrate the efficacy of the new decoder
Keywords :
decoding; digital communication; frequency shift keying; iterative methods; mobile communication; multi-access systems; probability; signal detection; collision frequency shift keying system; iteration; iterative consensus decoder; iterative multiuser detection; maximum a posteriori consensus decoder; multiple access FSK system; noise; noisy CFSK channel; performance; probability distributions; simulation; Cities and towns; Detectors; Equations; Frequency shift keying; Information processing; Iterative algorithms; Iterative decoding; Multiuser detection; Probability distribution; Signal processing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Theory. 1997. Proceedings., 1997 IEEE International Symposium on
Conference_Location :
Ulm
Print_ISBN :
0-7803-3956-8
Type :
conf
DOI :
10.1109/ISIT.1997.613245
Filename :
613245
Link To Document :
بازگشت