Title :
Decision-feedback blind adaptive multiuser detector with MSE equalizer in synchronous DS-CDMA
Author :
Choi, Bong-Gi ; Kwack, Kyung-Sup
Author_Institution :
Mobile Comm. Technol. Dept, LG Electron. Inc., South Korea
Abstract :
The CMA based decision-feedback blind adaptive multiuser detectors (DFBD-CMA) have been studied and proven to be similar to the performance of decorrelating decision-feedback multiuser detector (DDFD), but its convergence is shown to be slow. We substitute the MSE equalizer for the CMA equalizer and propose an alternative blind adaptive multiuser detector for synchronous CDMA, called DFBD-MSE. Our simulations show the convergence of DFBD-MSE is better than that of DFBD-CMA, and its error performance is very similar to DFBD-CMA in both AWGN channels and slowly varying Rician and Rayleigh fading channel. Our DFBD-MSE can be used in a base station because it requires the timings and codes of each user
Keywords :
Rayleigh channels; Rician channels; adaptive signal detection; code division multiple access; convergence of numerical methods; decision feedback equalisers; decorrelation; land mobile radio; mean square error methods; multiuser channels; spread spectrum communication; AWGN channels; DFBD-CMA; DFBD-MSE; MSE equalizer; convergence; decision-feedback blind adaptive multiuser detector; decision-feedback filter; decorrelating decision-feedback multiuser detector; error performance; mobile communication; simulations; slowly varying Rayleigh fading channel; slowly varying Rician channel; synchronous DS-CDMA; whitening noise model; AWGN channels; Base stations; Code division multiplexing; Convergence; Decorrelation; Detectors; Equalizers; Fading; Rician channels; Timing;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944056
