DocumentCode :
1641357
Title :
Multiresolution-beamspace space-time multiuser detection in DS-CDMA systems
Author :
Zhao, Zheng ; Wu, Xiaojun ; Yin, Qinye
Author_Institution :
Inst. of Inf. Eng., Xi´´an Jiaotong Univ., China
Volume :
2
fYear :
2001
fDate :
6/23/1905 12:00:00 AM
Firstpage :
543
Abstract :
Joint space-time multiuser detection provides a significant performance improvement over cascade space-time multiuser detection. But its computation load makes it impossible to be applied in practical situations. We propose a wavelet-based multiresolution-beamspace approach. Using the multiresolution of wavelets, it reduces the computation load of joint space-time multiuser detector in DS-CDMA. It is a tradeoff between the cascade and joint space-time processing. In applying wavelets to an array problem, we discuss the multiresolution in an array signal. Simulations show that there is a reduction of the computational load and compared with other beamspace methods, it improves the performance
Keywords :
code division multiple access; interference suppression; intersymbol interference; multiuser channels; signal detection; signal resolution; space-time adaptive processing; spread spectrum communication; wavelet transforms; DS-CDMA systems; ISI suppression; STAP; cascade space-time multiuser detection; computation load reduction; intersymbol interference; joint space-time multiuser detection; joint space-time processing; multiresolution-beamspace space-time multiuser detection; simulations; space-time adaptive processing; wavelet decomposition; wavelet-based multiresolution-beamspace approach; Detectors; Intersymbol interference; Multiaccess communication; Multiple access interference; Multiuser detection; Sensor arrays; Signal processing algorithms; Signal resolution; Signal to noise ratio; Spatial resolution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
ISSN :
1090-3038
Print_ISBN :
0-7803-7005-8
Type :
conf
DOI :
10.1109/VTC.2001.956828
Filename :
956828
Link To Document :
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