Efficient POCS algorithms for deterministic blind equalization of time-varying channels

Author

Artés, Harold ; Hlawatsch, Franz ; Matz, Gerald

Author_Institution

Inst. of Commun. & Radio-Frequency Eng., Tech. Univ. Wien, Austria

Volume

2

fYear

2000

fDate

2000

Firstpage

1031

Abstract

We present two POCS (projections onto convex sets) algorithms for deterministic blind equalization of linear time-varying (LTV) channels. Our approach is based on a multichannel LTI representation of LTV channels. We prove a theorem on unique reconstruction/equalization, formulate a POCS algorithm for the resolution of a matrix ambiguity, and show how to cope with unequal subchannel lengths. We also present an alternative POCS algorithm for equalization that avoids a singular value decomposition. Both algorithms are guaranteed to converge to the desired solution

Keywords

blind equalisers; convergence of numerical methods; matrix algebra; time-varying channels; LTV channels; algorithm convergence; deterministic blind equalization; efficient POCS algorithms; linear time-varying channels; matrix ambiguity resolution; multichannel LTI representation; projections onto convex sets; reconstruction/equalization; theorem; unequal subchannel lengths; Blind equalizers; Delay effects; Doppler shift; Electronic mail; Filters; Linear matrix inequalities; Matrix decomposition; Scattering; Sensor arrays; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE

Conference_Location

San Francisco, CA

Print_ISBN

0-7803-6451-1

Type

conf

DOI

10.1109/GLOCOM.2000.891294

Filename

891294