DocumentCode :
1086867
Title :
Chaos-based multi-user time division multiplexing communication system
Author :
Jovic, B. ; Unsworth, C.P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Auckland, Auckland
Volume :
1
Issue :
4
fYear :
2007
fDate :
8/1/2007 12:00:00 AM
Firstpage :
549
Lastpage :
555
Abstract :
A chaos-based multi-user time division multiplexing (TDM) communication system has been proposed and its benchmark performance compared to that of the chaos-based direct sequence code division multiple access (DS-CDMA) system in the noisy and Rayleigh fading channels. The benchmark performance of the systems is investigated in terms of the bit error rate (BER) under the assumption of perfect synchronisation. The chaotic spreading signals, used to encrypt the binary messages, are generated using the logistic map. The degradation in performance of the systems in the Rayleigh fading channel when compared with the noisy channel is demonstrated. Furthermore, it is shown that in both noisy and Rayleigh fading channels, the chaos-based multi-user TDM system outperforms the chaos-based DS-CDMA system for a large number of users in the system, whereas the chaos-based DS-CDMA system yields better performance for low user numbers. The overall BER performance degradation for the chaos-based DS-CDMA multi-user system in noisy and Rayleigh fading channels is characterised by the flattening of the BER curves at low levels of noise due to the prevailing effects of the interuser interferences.
Keywords :
Rayleigh channels; chaotic communication; code division multiple access; cryptography; error statistics; spread spectrum communication; BER; DS-CDMA; Rayleigh fading channels; TDM communication system; benchmark performance; binary message encyrption; bit error rate; chaos-based multiuser time division multiplexing communication system; direct sequence code division multiple access; interuser interferences; logistic map; performance degradation;
fLanguage :
English
Journal_Title :
Communications, IET
Publisher :
iet
ISSN :
1751-8628
Type :
jour
DOI :
10.1049/iet-com:20060672
Filename :
4286605
Link To Document :
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