Title :
Successive Interference Cancellation for DS-CDMA Downlink/Uplink
Author :
Li, Jian ; Zhang, Xian-Da ; Gao, Qiubin
Author_Institution :
Tsinghua Univ., Beijing
fDate :
March 31 2008-April 3 2008
Abstract :
In this paper, we introduce two novel successive interference cancellation (SIC) algorithms for multiuser detection (MUD) in direct-sequence code-division multiple-access (DS-CDMA) systems. One is proposed for receivers in the downlink and the other for receivers in the uplink. The downlink SIC algorithm is a blind MUD which consists of two parts: estimating the signature sequences and amplitudes of interference users first, and then implementing the SIC detection. The uplink SIC algorithm is implemented by accurately estimating the amplitudes of each active user first and then performing the QR-decomposition based SIC. Simulation results show that the proposed algorithms are near-far resistant and outperform the conventional well-known SIC algorithms significantly.
Keywords :
code division multiple access; receivers; DS-CDMA downlink; DS-CDMA uplink; QR-decomposition; direct-sequence code-division multiple-access; downlink SIC algorithm; multiuser detection; receivers; signature sequences; successive interference cancellation; AWGN; Additive white noise; Amplitude estimation; Detectors; Downlink; Interference cancellation; Multiaccess communication; Multiple access interference; Multiuser detection; Silicon carbide;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.76