An adaptive step-size code-constrained minimum output energy receiver for nonstationary CDMA channels

Author

Yuvapoositanon, Peerapol ; Chambers, Jonathon A.

Author_Institution

Dept. of Electron. Eng., Mahanakorn Univ. of Technol., Bangkok, Thailand

Volume

4

fYear

2003

fDate

6-10 April 2003

Abstract

The adaptive step-size (AS) code-constrained minimum output energy (CMOE) receiver for nonstationary code-division multiple access (CDMA) channels is proposed. The AS-CMOE algorithm adaptively varies the step-size in order to minimise the CMOE criterion. Admissibility of the proposed method is confirmed via the reformulation of the CMOE criterion as an unconstrained optimisation. The ability of the algorithm to track sudden changes of the channel structure in multipath fading channels is assessed. Sensitivity to the initial values of step-size and the adaptation rate of the algorithm is also investigated.

Keywords

adaptive signal detection; code division multiple access; fading channels; minimisation; multipath channels; optimisation; radio receivers; adaptation rate; adaptive step-size code-constrained minimum output energy receiver; adaptive step-size receiver; code-constrained receiver; multipath channels; multipath fading channels; nonstationary CDMA channels; nonstationary code-division multiple access channels; unconstrained optimisation; AWGN; Detectors; Fading; Gradient methods; Multiaccess communication; Multiple access interference; Power engineering and energy; Signal processing algorithms; Stability; Stochastic processes;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-7663-3

Type

conf

DOI

10.1109/ICASSP.2003.1202680

Filename

1202680