DocumentCode :
1709777
Title :
A low-cost adaptive algorithm for blind equalization without channel order estimation
Author :
Kacha, Ibrahim ; Abed-Meraim, Karim ; Belouchrani, Adel
Author_Institution :
Electr. Eng. Dept., Ecole Nat. Polytech. (ENP), Algiers
fYear :
2008
Firstpage :
1384
Lastpage :
1388
Abstract :
In this work, we present an improved version of adaptive implementation of our algorithm developed in [12], that equalizes a noisy single input multiple output finite impulse response (SIMO-FIR) systems, relying only on second order statistics, totally independent from the channel order. In the proposed version, we reduce the computational complexity from O(n 3) to O(np), where n is the data vector length and p is the sensor number. This is due, essentially, to the use of : (i) projection approximation, (ii) fast minor subspace trackers, (iii) shift invariance property of the data correlation matrix, and (iv) stochastic gradient technique. In addition, we propose a comparative study of performance of some typical fast minor subspace estimating and tracking algorithms. Simulation results are provided to illustrate the effectiveness of the low-cost adaptive implementation of the proposed algorithm.
Keywords :
FIR filters; adaptive filters; blind equalisers; correlation methods; gradient methods; stochastic processes; blind equalization; computational complexity; data correlation matrix; low-cost adaptive algorithm; second order statistics; shift invariance property; single input multiple output finite impulse response system; stochastic gradient technique; Adaptive algorithm; Adaptive equalizers; Blind equalizers; Computational complexity; Image processing; Robustness; Signal processing; Statistics; Stochastic processes; Telecommunications;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, Control and Signal Processing, 2008. ISCCSP 2008. 3rd International Symposium on
Conference_Location :
St Julians
Print_ISBN :
978-1-4244-1687-5
Electronic_ISBN :
978-1-4244-1688-2
Type :
conf
DOI :
10.1109/ISCCSP.2008.4537442
Filename :
4537442
Link To Document :
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