Channel blind identixFB01;cation based on cyclostationarity13; and group delay

Narasimhan, SV and Hazarathaiah, M and Giridhar, PVS (2005) Channel blind identixFB01;cation based on cyclostationarity13; and group delay. Signal Processing, 85 . pp. 1275-1286.

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Abstract

A new approach for channel blind identification based on second order cyclostationary statistics and the group delay has been proposed. In this, two methods are proposed. In both the methods, the correction is applied to the basic phase estimate for both the poles and zeros, in the group delay domain. The basic phase estimate is derived from the spectral correlation density (SCD) of the system output. In the first method, the phase correction is based on magnitude group delay. In the second method, not only the phase correction but also an improved system magnitude estimate of better variance and frequency resolution is derived based on modified magnitude group delay. The results indicate a significant improvement in performance for both the methods. For the first method in the absence of noise, the percentage normalized mean square error is reduced by about 85% over that of the existing non-parametric method. The second method in the presence of noise (SNR xBC; 5 dB), provides a reduction of 74% over the existing non-parametric method and 57% over the existing combined parametric and non-parametric methods

Item Type:	Journal Article
Additional Information:	Copyright for this article belongs to Elsevier
Uncontrolled Keywords:	Cyclostationarity;Group delay functions;Channel blind- identixFB01;cation
Subjects:	ENGINEERING > Engineering (General)
Division/Department:	Aerospace Electronics and Controls Division, Other, Other
Depositing User:	Ms. Alphones Mary
Date Deposited:	20 Dec 2005
Last Modified:	03 May 2012 10:22
URI:	http://nal-ir.nal.res.in/id/eprint/907

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