Title :
Blind detection of high data rate wireless CDMA in multipath channels
Author :
Alim, Onsy Abdel ; Elnoubi, Said ; El-Khamy, Mostafa
Author_Institution :
Dept. of Electr. Eng., Alexandria Univ., Egypt
Abstract :
We study the performance of a DS-CDMA blind multiuser detector in multipath Rayleigh fading channels for high data rates where the delay spread can be larger than one symbol duration. We study blind recursive least squares (RLS) detectors with an additional constraint on the energy of the filter tap weights. This constraint prevents the cancellation of the desired signal in case the estimated subspace of the desired signal suffers from a mismatch. Simulations show that in cases of high signal to interference and noise ratios (SINR) as well as in cases of severe inter-symbol interference (ISI), our proposed detector is superior to previously proposed detectors for multipath channels
Keywords :
Rayleigh channels; code division multiple access; intersymbol interference; least squares approximations; multipath channels; radio receivers; radiofrequency interference; recursive filters; signal detection; spread spectrum communication; DS-CDMA blind multiuser detector; ISI; RLS detectors; blind detection; blind recursive least squares detectors; delay spread; filter tap weights; high data rate wireless CDMA; inter-symbol interference; multipath Rayleigh fading channels; multipath channels; signal to interference and noise ratios; Delay; Detectors; Fading; Filters; Interference constraints; Least squares methods; Multiaccess communication; Resonance light scattering; Signal to noise ratio; Subspace constraints;
Conference_Titel :
Info-tech and Info-net, 2001. Proceedings. ICII 2001 - Beijing. 2001 International Conferences on
Conference_Location :
Beijing
Print_ISBN :
0-7803-7010-4
DOI :
10.1109/ICII.2001.983617