DocumentCode :
938039
Title :
Fade-resistant CDMA transmission and reception over time-varying wireless channels
Author :
Saquib, Mohammad ; Das, Sushanta ; Mandyam, Giridhar ; Win, Moe Z.
Author_Institution :
Texas Univ., Dallas, TX, USA
Volume :
5
Issue :
5
fYear :
2006
fDate :
5/1/2006 12:00:00 AM
Firstpage :
1197
Lastpage :
1206
Abstract :
Physical limitations due to fading and interference in wireless channels pose technical challenges in achieving reliable communication. To adapt to this adverse radio environment efficiently, we propose a fade-resistant transmission system based on code division multiple access (CDMA) technology. In this system, all the symbols of a user are transmitted simultaneously using parallel sequences over a time-varying wireless channel. We derive the relationship between the self-interference and the multiple-access interference in such a system. We prove that instantaneous signal-to-interference-plus-noise ratio (SINR) at the matched filter output of a system with parallel sequences is statistically higher than that of the conventional CDMA system. Numerical results demonstrate that the parallel sequence transmission scheme can provide capacity improvement over the conventional CDMA system depending on variations in the channel.
Keywords :
code division multiple access; matched filters; radiofrequency interference; telecommunication network reliability; time-varying channels; wireless channels; code division multiple access; fade-resistant CDMA transmission; matched filter; multiple-access interference; parallel sequences; reliable communication; self-interference; signal-to-interference-plus-noise ratio; time-varying wireless channels; Data communication; Fading; Laboratories; Land mobile radio cellular systems; Matched filters; Multiaccess communication; Multiple access interference; Radio link; Signal to noise ratio; Time varying systems;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2006.1633373
Filename :
1633373
Link To Document :
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