Title :
Low-complexity multiuser detector for coherent and incoherent CDMA mobile radio communications
Author :
Re, E. Del ; Fantacci, R. ; Morosi, S. ; Raugei, M. ; Vivaldi, G.
Author_Institution :
LENST Lab., Florence Univ., Italy
fDate :
6/21/1905 12:00:00 AM
Abstract :
This paper deals with a multiuser detector based on a decorrelating approach for asynchronous up-link DS/CDMA communications in which QPSK modulation schemes are used in transmission and coherent and incoherent receivers in reception. It is shown here that the receivers proposed are near-far resistant and exhibits lower complexity than the optimum detector. The incoherent realization allows a lighter complexity overhead for the synchronization circuitry. The receivers performance is expressed in terms of the bit error rate (BER) which has been derived by simulations under the assumption of a slowly frequency-selective Rayleigh fading channel
Keywords :
Rayleigh channels; code division multiple access; computational complexity; digital simulation; error statistics; land mobile radio; multiuser channels; quadrature phase shift keying; radio links; radio receivers; signal detection; spread spectrum communication; synchronisation; BER; QPSK modulation; asynchronous up-link DS/CDMA communications; bit error rate; coherent CDMA mobile radio communications; coherent receiver; complexity overhead; decorrelation; incoherent CDMA mobile radio communications; incoherent receiver; low-complexity multiuser detector; near-far resistant receivers; optimum detector; receiver performance; simulations; slowly frequency-selective Rayleigh fading channel; synchronization circuitry; AWGN; Bit error rate; Decorrelation; Detectors; Fading; Interference; Land mobile radio; Mobile communication; Multiaccess communication; Quadrature phase shift keying;
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Conference_Location :
Rio de Janeireo
Print_ISBN :
0-7803-5796-5
DOI :
10.1109/GLOCOM.1999.830231
