Title :
Linear multiuser precoding for synchronous CDMA
Author :
Wang, Shu ; Caffery, James ; Shen, Jr Hanhong, Jr.
Author_Institution :
Dept. of Electr. & Comput. Eng. & Comput. Sci., Cincinnati Univ., OH, USA
Abstract :
Multiuser transmitter precoding is a technique that has been proposed for combating multiple-access interference (MAI). In this paper, the structure and principles of multiuser transmitter design are reviewed. In addition to multiuser precoding using the minimum mean-square error (MMSE) criterion [B. R. Vojoic and W. M. Jang, October 1998], we present a decorrelating multiuser precoder (DP), an approximate maximum likelihood (AML) multiuser precoder and a maximum asymptotic multiuser efficiency (MAME) multiuser precoder for mitigating MAI in synchronous CDMA systems. In addition, the geometric properties, asymptotic multiuser efficiency (AME) and mutual information rate between the transmitter and receiver are discussed. Finally, computer simulations are provided to demonstrate the performance of the proposed multiuser precoding algorithms.
Keywords :
code division multiple access; interference suppression; least mean squares methods; maximum likelihood detection; multiuser detection; optimisation; radio transmitters; spread spectrum communication; synchronisation; CDMA system; MMSE; decorrelating multiuser precoder; maximum asymptotic multiuser efficiency multiuser precoder; minimum mean square error criterion; multiple access interference; multiuser transmitter design; multiuser transmitter precoding; mutual information rate; AWGN; Code division multiplexing; Decorrelation; Intersymbol interference; Maximum likelihood detection; Multiaccess communication; Multiple access interference; Mutual information; Signal processing algorithms; Transmitters;
Conference_Titel :
Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-7700-1
DOI :
10.1109/WCNC.2003.1200383
