Title :
Bit error probability of linear multiuser detectors in the presence of unknown multiple access interference
Author :
Esteves, Eduardo S. ; Scholte, R.A.
Author_Institution :
Commun. Sci. Inst., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
We investigate the effect of unknown multiple access interference in the bit-error-rate (BER) achieved by linear multiuser detectors. This problem arises in several practical CDMA applications where the receiver may not have full knowledge of the number of active users and their signature sequences (e.g., intercell interference). We consider two linear detectors: the decorrelating and MMSE multiuser detectors. BER is computed for both the AWGN and frequency non-selective fading channels
Keywords :
Gaussian channels; code division multiple access; correlation methods; error statistics; fading; interference (signal); least mean squares methods; receivers; spread spectrum communication; AWGN fading channels; BER; CDMA; MMSE multiuser detectors; active users number; bit error probability; decorrelating multiuser detectors; frequency nonselective fading channels; intercell interference; linear multiuser detectors; receiver; signature sequences; unknown multiple access interference; Bit error rate; Covariance matrix; Detectors; Error probability; Fading; Matched filters; Maximum likelihood detection; Multiaccess communication; Multiple access interference; Random variables;
Conference_Titel :
Global Telecommunications Conference, 1997. GLOBECOM '97., IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-4198-8
DOI :
10.1109/GLOCOM.1997.638400
