Adaptive space-time MMSE receivers in DS/CDMA systems

Author

Pham, V.D. ; Vu, T.B.

Author_Institution

Sch. of Electr. Eng., New South Wales Univ., Sydney, NSW, Australia

fYear

1998

fDate

1998

Firstpage

470

Abstract

An adaptive space-time MMSE receiver is proposed for asynchronous DS/CDMA by combining an adaptive antenna array and adaptive filter to take advantage of combined filtering in both the space and time domains. The receiver can provide a better suppression and a reduced sensitivity to co-channel interference in a near-far environment. The convergence of the LMS adaptation procedure toward the Wiener optimum solutions of the adaptive array and adaptive filter is presented based on minimisation of MSE. Simulation results show that considerable improvement in convergence, and steady-state MSE as well as BER over the existing single-antenna MMSE receiver can be achieved

Keywords

Wiener filters; adaptive antenna arrays; adaptive filters; array signal processing; cochannel interference; convergence of numerical methods; error statistics; interference suppression; least mean squares methods; space-time adaptive processing; spread spectrum communication; BER; LMS adaptation; MMSE; Wiener optimum solutions; adaptive antenna array; adaptive filter; adaptive space-time receivers; asynchronous DS/CDMA; co-channel interference; convergence; minimisation; near-far environment; simulation; suppression; Adaptive arrays; Adaptive filters; Adaptive systems; Antenna arrays; Filtering; Interchannel interference; Least squares approximation; Multiaccess communication; Receiving antennas; Steady-state;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Proceedings, 1998. ICSP '98. 1998 Fourth International Conference on

Conference_Location

Beijing

Print_ISBN

0-7803-4325-5

Type

conf

DOI

10.1109/ICOSP.1998.770252

Filename

770252