DocumentCode :
1511398
Title :
Blind adaptive algorithm for demodulation of DS/CDMA signals with mismatch
Author :
Hwang, H.-C. ; Wei, C.-H.
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Volume :
146
Issue :
1
fYear :
1999
fDate :
2/1/1999 12:00:00 AM
Firstpage :
29
Lastpage :
34
Abstract :
The minimum mean-squared error (MMSE) linear detector is known to be a near-far resistant strategy for direct-sequence code-division multiple access systems. The MMSE linear detector can be implemented adaptively by the MOE adaptation algorithm or the Griffiths (1969) adaptation algorithm, which utilises the desired signal vector for initial adaptation instead of training sequences. The performance loss caused by the imprecise knowledge of the desired signal vector is investigated. A new blind adaptive algorithm is presented to mitigate the effect of the mismatch caused by the timing error in acquisition. Several numerical results show that the new algorithm can provide a resistance to the effect of mismatch compared to the MOE and Griffiths algorithms
Keywords :
code division multiple access; demodulation; least mean squares methods; receivers; spread spectrum communication; synchronisation; DS/CDMA signals; Griffiths adaptation algorithm; MMSE linear detector; MOE adaptation algorithm; blind adaptive algorithm; demodulation; direct-sequence code-division multiple access systems; minimum mean-squared error linear detector; mismatch; near-far resistant strategy; performance loss; signal vector; timing error;
fLanguage :
English
Journal_Title :
Communications, IEE Proceedings-
Publisher :
iet
ISSN :
1350-2425
Type :
jour
DOI :
10.1049/ip-com:19990284
Filename :
766563
Link To Document :
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