DocumentCode :
3491854
Title :
A hypothesis testing approach to blind DS-CDMA user identification and detection via code-constrained successive cancellation
Author :
Ma, Jznghong ; Tagnait, J.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Auburn Univ., AL, USA
Volume :
4
fYear :
2003
fDate :
6-10 April 2003
Abstract :
A code-constrained inverse filter criterion based approach was recently presented by J.K. Tugnait and Tongtong Li (see IEEE Trans. Sig. Processing, vol.SP-49, p.1300-9, 2001) for blind detection of a desired user in asynchronous short-code DS-CDMA (direct sequence code division multiple access) systems over multipath channels. The method proposed therein works well for low-to-moderate loading; however, it can converge to an undesired user under high loading. We augment this method with a binary hypothesis testing approach for extracted user identification (whether the desired user is acquired/extracted) and for successive user cancellation (if an undesired user is extracted, cancel its contribution and repeat). An illustrative simulation example is presented.
Keywords :
code division multiple access; codes; identification; multipath channels; optimisation; signal detection; spread spectrum communication; asynchronous short-code DS-CDMA; binary hypothesis testing; blind DS-CDMA user detection; blind detection; blind user identification; code-constrained successive cancellation; direct sequence code division multiple access; inverse filter criterion; maximization; multipath channels; spreading codes; Data mining; Delay effects; Direct-sequence code-division multiple access; Equalizers; Filters; Information filtering; Multiaccess communication; Multipath channels; Statistical analysis; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
ISSN :
1520-6149
Print_ISBN :
0-7803-7663-3
Type :
conf
DOI :
10.1109/ICASSP.2003.1202540
Filename :
1202540
Link To Document :
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