EURASIP Journal on Advances in Signal Processing
Volume 2007 (2007), Article ID 25672, 13 pages
doi:10.1155/2007/25672
Research Article
A Generalized Algorithm for Blind Channel Identification with Linear Redundant Precoders
Department of Electrical Engineering, California Institute of Technology, Pasadena 91125, CA, USA
Received 25 December 2005; Revised 19 April 2006; Accepted 11 June 2006
Academic Editor: See-May Phoong
Copyright © 2007 Borching Su and P. P. Vaidyanathan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
It is well known that redundant filter bank precoders can be used for blind identification as well as equalization of FIR channels. Several algorithms have been proposed in the literature exploiting trailing zeros in the transmitter. In this paper we propose a generalized algorithm of which the previous algorithms are special cases. By carefully choosing system parameters, we can jointly optimize the system performance and computational complexity. Both time domain and frequency domain approaches of channel identification algorithms are proposed. Simulation results show that the proposed algorithm outperforms the previous ones when the parameters are optimally chosen, especially in time-varying channel environments. A new concept of generalized signal richness for vector signals is introduced of which several properties are studied.