DocumentCode :
792039
Title :
Small delay multipath diversity in spread spectrum communication systems
Author :
Luo, Tao ; Sousa, Elvino S. ; Pasupathy, Subbarayan
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Volume :
50
Issue :
7
fYear :
2002
fDate :
7/1/2002 12:00:00 AM
Firstpage :
1160
Lastpage :
1171
Abstract :
A new double-filter receiver for spread spectrum wireless systems is presented. The receiver exploits the inherent diversity due to the small delay difference between the multipaths which may not be exploited by the conventional RAKE receiver. The bit error rate performances of both the coherent and the noncoherent detectors are analyzed and compared with the ideal RAKE receiver and the matched filter bound. We also examine the best and the worst cases of a three-path fading channel for the proposed receiver. Optimum pulse shapes under various channel conditions are designed. Implementation issues in code-division multiple access systems are discussed. The numerical results show that the proposed receiver achieves significant gains for a given spreading factor under a complexity constraint.
Keywords :
code division multiple access; delays; diversity reception; error statistics; fading channels; filtering theory; matched filters; multipath channels; multiuser channels; radio receivers; spread spectrum communication; BER performance; CDMA systems; RAKE receiver; bit error rate performance; channel conditions; code-division multiple access systems; coherent detector; complexity constraint; double-filter receiver; fast power control; matched filter bound; multipath channel; noncoherent detector; optimum pulse shapes; small delay multipath diversity; spread spectrum communication systems; spreading factor; three-path fading channel; Bit error rate; Delay; Detectors; Fading; Matched filters; Multipath channels; Performance analysis; Pulse shaping methods; RAKE receivers; Spread spectrum communication;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2002.800814
Filename :
1021048
Link To Document :
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