DocumentCode :
3050021
Title :
Performance comparison of decorrelator designs for multiuser detection in asynchronous CDMA channel
Author :
Gulhane, Sanjay M. ; Pathak, Sant S.
Author_Institution :
E & T Dept, Jawaharlal Darda Inst. of Eng. & Technol., Yavatmal, India
fYear :
2010
fDate :
21-23 Oct. 2010
Firstpage :
1
Lastpage :
6
Abstract :
In this paper, a reduced rank extended window decorrelator (RREWD) for asynchronous CDMA detection is derived. The reduction in the rank of the extended window signal space is obtained through interference cancellation. It is shown that the reduction in rank of the decorrelation matrix improves the performance and user capacity of the extended window decorrelator. Further, it is demonstrated that the edge assisted decorrelator, which also work on the similar principle of interference cancellation, exhibit the identical architectures as that of the RREWD. The results have become more demonstrative by introducing a classification for the decorrelators. The type of signature sequences used in processing the received signal at the receiver decides the class to which the decorrelator may belong. Full signature sequences based decorrelators are considered as the members of class-I while those that used partial/full signature sequences form class-II. A comparison of these two classes of decorrelators is presented to highlight the relative merits.
Keywords :
code division multiple access; decorrelation; interference suppression; matrix algebra; multiuser detection; asynchronous CDMA channel; decorrelation matrix; decorrelator designs; edge assisted decorrelator; extended window signal space; full signature sequences based decorrelators; interference cancellation; multiuser detection; reduced rank extended window decorrelator; signature sequences; Correlation; Decorrelation; Estimation; Interference cancellation; Matched filters; Noise; Code division multiple access; Decorrelator; Interference cancellation; Multiuser detector;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Signal Processing (WCSP), 2010 International Conference on
Conference_Location :
Suzhou
Print_ISBN :
978-1-4244-7556-8
Electronic_ISBN :
978-1-4244-7554-4
Type :
conf
DOI :
10.1109/WCSP.2010.5633651
Filename :
5633651
Link To Document :
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