A combined Kalman filter and constant modulus algorithm beamformer for fast-fading channels

Author

Pora, W. ; Chambers, J.A. ; Constantinides, A.G.

Author_Institution

Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK

Volume

5

fYear

1999

fDate

1999

Firstpage

2925

Abstract

Beamformers which use only the constant modulus algorithm (CMA) are unable to track properly time-variant signals in fast-fading channels. The Kalman kilter (KF), however, has significant advantage in time-varying channels but needs a training sequence to operate. A combined CMA and KF algorithm is therefore proposed in order to utilise the advantages of both algorithms. The associated stepsize of the combination is also varied in accordance with the magnitude of the output. Simulations are presented to demonstrate the potential of this new approach

Keywords

Kalman filters; array signal processing; fading channels; filtering theory; time-varying channels; tracking filters; Kalman filter algorithm; constant modulus algorithm; constant modulus algorithm beamformer; fast-fading channels; output magnitude; sensor array; simulations; stepsize; time-variant signals tracking; time-varying channels; training sequence; Additive noise; Bit error rate; Educational institutions; Equalizers; Feedback; Least squares approximation; Maximum likelihood estimation; Noise measurement; Nonlinear filters; Sensor arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on

Conference_Location

Phoenix, AZ

ISSN

1520-6149

Print_ISBN

0-7803-5041-3

Type

conf

DOI

10.1109/ICASSP.1999.761375

Filename

761375