Title :
Spreading code selection and power control strategy for warp converging multiuser detection in asynchronous CDMA systems
Author :
Wang, Xiaoli ; Ge, Hongya
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
Abstract :
In this work, we study the eigen-structure of the data covariance matrix in an asynchronous CDMA system. Our results reveal the joint effect of spreading codes and power control on warp converging Wiener filters. We further provide suggestions on spreading code selection and power control strategy in CDMA system design, where stable and predictable early convergence of the reduced-rank conjugate gradient Wiener filter (RRCG-WF) based multiuser detection (MUD) can be obtained.
Keywords :
Wiener filters; code division multiple access; conjugate gradient methods; covariance matrices; eigenvalues and eigenfunctions; multiuser detection; MUD; RRCG-WF; Wiener filter; asynchronous CDMA system; data covariance matrix; eigen-structure; multiuser detection; power control strategy; reduced-rank conjugate gradient method; spreading code selection; warp convergence; Convergence; Covariance matrix; Eigenvalues and eigenfunctions; Gold; Multiaccess communication; Multiuser detection; Power control;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2012 IEEE International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-4673-0045-2
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2012.6288545
