Exponential power estimation (EPE) based adaptive equalization for stationary and time varying channels

Girish, Chandra S and Narasimhan, SV (1996) Exponential power estimation (EPE) based adaptive equalization for stationary and time varying channels. Signal Processing, 54 (1). pp. 49-58. ISSN 0165-1684

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In this paper, an adaptive equalizer that uses normalized LMS algorithm is proposed and the normalization is being13; achieved by using the exponential power estimator (EPE) (Bellanger and Evci, 1985; Bellanger, 1987; Mathew et al.,13; 1992). The exponential nature of the power estimator together with the computational simplicity involved in implementing the equalizer, makes it advantageous over the constant step-size LMS and the normalized LMS algorithms which use block and recursive power estimators. The proposed EPE-based equalizer has been studied both for stationary and time-varying channels. For both these channels, the proposed algorithm has been found to provide better or equal performance in terms of convergence rate, convergence error and hence the bit error over that of the aforementioned equalizers. Specifically, for channels with large eigenvalue spread, it has a performance advantage of a factor of 2 (about)and this is valid even at SNR of about 15 dB.

Item Type: Article
Additional Information: copy right 1996 Elsevier Science B.V. All rights reserved
Uncontrolled Keywords: Adaptive channel equalizer;Normalized gradient LMS algorithm;Block, recursive and exponential power13; estimators
Subjects: ENGINEERING > Electronics and Electrical Engineering
Depositing User: Ms Indrani V
Date Deposited: 29 Apr 2005
Last Modified: 30 Apr 2012 05:46
URI: http://nal-ir.nal.res.in/id/eprint/748

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