Title :
A two-layer spreading code scheme for dual-rate DS-CDMA systems
Author :
Yao, Yingwei ; Poor, H. Vincent
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., NJ, USA
fDate :
6/1/2003 12:00:00 AM
Abstract :
This letter considers multiuser detection in variable-spreading-length multi-rate direct-sequence code-division multiple-access systems. A two-layer spreading (TLS) code scheme is proposed which facilitates the low-complexity adaptive implementation of linear minimum mean-square error multiuser receivers in a dual-rate system. It is demonstrated via large system analysis and simulation that imposing a TLS structure does not incur loss in terms of the output signal-to-interference ratio performance.
Keywords :
code division multiple access; mean square error methods; multiuser detection; spread spectrum communication; TLS structure; dual-rate DS-CDMA systems; linear minimum mean-square error; loss; low-complexity adaptive implementation; multiuser detection; output signal-to-interference ratio performance; two-layer spreading code scheme; variable-spreading-length systems; Adaptive control; Delay estimation; Interference cancellation; Multiaccess communication; Multiuser detection; Performance analysis; Performance loss; Programmable control; Signal analysis; Silicon carbide;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2003.813266
