Title :
A dual-mode multiuser detector for DS-CDMA systems
Author :
Fan, Mingxi ; Siu, Kai-Yeung
Author_Institution :
Lab. for Inf. & Decision Syst., MIT, Cambridge, MA, USA
fDate :
2/1/2002 12:00:00 AM
Abstract :
We introduce a dual-mode multiuser detector that dynamically switches its detection mode between matched-filter and decorrelator operations based on the channel characteristics. This detector significantly reduces the overall computational requirement while maintaining similar performance as that of the decorrelator. The switching mechanism of our dual-mode detector is designed by exploiting the performance-complexity tradeoff between the decorrelator and the matched-filter. Extensions of this idea to other types of multiuser detectors are also proposed
Keywords :
cellular radio; code division multiple access; computational complexity; decorrelation; filtering theory; interference suppression; matched filters; multiuser channels; radio receivers; radiofrequency interference; signal detection; spread spectrum communication; DS-CDMA systems; additive white Gaussian noise channel; cellular radio; channel characteristics; computational requirement reduction; decorrelator; direct sequence-code division multiple access; dual-mode multiuser detector; frequency nonselective AWGN channel; matched filter; multiple access interference suppression; performance-complexity tradeoff; receiver design; receiver perforrnance; switching mechanism; AWGN; Bit error rate; Computational complexity; Decorrelation; Detectors; Matched filters; Multiaccess communication; Multiple access interference; Quality of service; Switches;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
