Title :
A low-complexity multiuser detector for asynchronous CDMA QPSK systems
Author :
Del Re, E. ; Fantacci, R. ; Morosi, S. ; Vivaldi, G.
Author_Institution :
Dipt. di Ingegneria Elettronica, Firenze Univ., Italy
Abstract :
This paper deals with a multiuser detector based on a new decorrelating approach for asynchronous up-link DS/CDMA communications in which the QPSK modulation scheme is used in transmission. It is shown that the receiver proposed is near-far resistant and exhibits a low complexity which allows real-time operation. The performance is expressed in terms of the bit error rate (BER) which has been derived by simulations under the assumption of a slow frequency-selective Rayleigh fading channel
Keywords :
Rayleigh channels; code division multiple access; decorrelation; error statistics; land mobile radio; multiuser channels; quadrature phase shift keying; radio links; radio receivers; signal detection; spread spectrum communication; BER; DS/CDMA communications; QPSK; QPSK modulation; asynchronous CDMA QPSK systems; asynchronous up-link; bit error rate; decorrelation; frequency-selective Rayleigh fading channel; low-complexity multiuser detector; mobile radio communications; near-far resistant receiver; performance; real-time operation; simulations; AWGN; Bit error rate; Decorrelation; Detectors; Fading; Frequency; Land mobile radio; Multiaccess communication; Multipath channels; Quadrature phase shift keying;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4872-9
DOI :
10.1109/PIMRC.1998.733590
