Leaky constant modulus algorithms: sensitivity of local minima

Author

Lambotharan, S. ; Chambers, J.A. ; Constantinides, A.G.

Author_Institution

Sect. of Signal Process. & Digital Syst., Imperial Coll. of Sci., Technol. & Med., London, UK

Volume

5

fYear

1999

fDate

1999

Firstpage

2499

Abstract

We propose a new family of mixed constant modulus algorithms for the elimination of local minima associated with the fractionally spaced constant modulus algorithm in the presence of channel noise. A special case of this family is the leaky constant modulus algorithm (L-CMA). We show that L-CMA aims to minimise jointly the intersymbol interference (ISI) and the noise gain introduced by the equalizer. Moreover, we derive a suitable range of leakage factors for which all local minima due to large noise amplification are eliminated

Keywords

blind equalisers; intersymbol interference; minimisation; noise; sensitivity analysis; ISI minimisation; blind equalisation; channel noise; equalizer; intersymbol interference; leaky constant modulus algorithm; local minima sensitivity; noise gain; Blind equalizers; Convergence; Costs; Digital signal processing; Digital systems; Educational institutions; Equations; Intersymbol interference; Noise robustness; Signal processing algorithms;

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.1999.760638

Filename

760638