Title :
Effect of other-cell MAI on linear and nonlinear multiuser detectors
Author :
Wang, Zhaocheng ; Li, Kwok H. ; Kot, Alex C.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
Abstract :
This paper investigates the effect of other-cell multiple-access interference (MAI) on some suboptimal multiuser detectors such as decorrelating multiuser detector, parallel interference canceller and adaptive minimum mean-squared error (MMSE) multiuser detector. Based on the Gaussian approximation for other-cell MAI, the bit-error rate (BER) of each detector is derived. Both analytical results and simulations indicate that the performance degradation due to other-cell MAI is significant. It is also observed that the other-cell MAI introduces more errors to multiuser detectors that require prior information on users´ signature waveforms
Keywords :
Gaussian channels; adaptive signal detection; approximation theory; cellular radio; code division multiple access; coding errors; correlation methods; error statistics; interference suppression; land mobile radio; pseudonoise codes; radiofrequency interference; spread spectrum communication; AWGN channel; BER; DS-CDMA cellular system; Gaussian approximation; MMSE multiuser detector; adaptive minimum mean-squared error; bit-error rate; decorrelating multiuser detector; linear multiuser detector; multiple-access interference; nonlinear multiuser detector; other-cell MAI; parallel interference canceller; performance degradation; signature waveforms; simulations; suboptimal multiuser detectors; Bit error rate; Decorrelation; Degradation; Detectors; Forward error correction; Interference cancellation; Multiaccess communication; Multiple access interference; Multiuser detection; Performance analysis;
Conference_Titel :
Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on
Print_ISBN :
0-7803-3676-3
DOI :
10.1109/ICICS.1997.652059
