Title :
Performance analysis of multiuser receivers for large CDMA random access systems over rayleigh fading channels
Author :
Yu, Kai ; Fan, Pingzhi ; Hao, Li
Author_Institution :
Key Lab. of Inf. Coding & Transm., Inst. of Mobile Commun. Southwest Jiaotong Univ., Chengdu, China
Abstract :
The random access systems, exploiting multiuser detectors such as MMSE detector and decorrelator, over large random spreading CDMA channel subject to Rayleigh fading is investigated, under the assumption of infinite number of users, infinite spreading gain, and their ratio converging to a constant. The signal to interference ratio (SIR) is shown to converge almost surely to a constant and the bit-error rate (BER) limit is a function of the transmission probability and traffic load. The throughput and spectrum efficiency are analyzed, and confirmed by simulation results.
Keywords :
Rayleigh channels; code division multiple access; error statistics; least mean squares methods; receivers; CDMA random access; MMSE detector; Rayleigh fading channels; bit-error rate; multiuser detectors; multiuser receivers; Bit error rate; Decorrelation; Detectors; Fading; Interference; Multiaccess communication; Performance analysis; Rayleigh channels; Telecommunication traffic; Throughput; CDMA; Fading channel; multiuser detection; random access;
Conference_Titel :
Communications and Networking in China, 2009. ChinaCOM 2009. Fourth International Conference on
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4337-6
Electronic_ISBN :
978-1-4244-4337-6
DOI :
10.1109/CHINACOM.2009.5339848
