Title :
Frequency shift based multiple access interference canceller for DS-CDMA systems
Author :
Gonçalves, Luis ; Silva, Adão ; Gameiro, Atilio
Author_Institution :
Instituto de Telecomunicacoes, Universitario de Santiago, Aveiro, Portugal
fDate :
6/23/1905 12:00:00 AM
Abstract :
The cyclostationary properties of direct sequence spread spectrum signals are well known. These cyclostationary properties imply a redundancy between frequency components separated by multiples of the symbol rate. We present a multiple access interference canceller that explores this property and applies it to UMTS-TDD. This frequency domain canceller acts on the spread signal in such a way that minimizes the interference and noise at its output (minimum mean squared error criterium). The performance is evaluated in two detector configurations: one including the frequency shift canceller (FSC) and the other plus a parallel interference canceller (PIC). The results are benchmarked against the performance of the conventional RAKE detector and the conventional PIC detector
Keywords :
cellular radio; code division multiple access; interference suppression; least mean squares methods; radiofrequency interference; spread spectrum communication; time division multiplexing; DS-CDMA; RAKE detector; UMTS-TDD; cyclostationary properties; direct sequence spread spectrum signals; frequency shift canceller; minimum mean square error criterion; multiple access interference canceller; parallel interference canceller; third generation cellular systems; Band pass filters; Bandwidth; Detectors; Frequency; Interference cancellation; Multiaccess communication; Multiple access interference; Pulse modulation; Pulse shaping methods; Redundancy;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.957195
