TITLE:
An Approximated Expression for the Residual ISI Obtained by Blind Adaptive Equalizer and Biased Input Signals
AUTHORS:
Nissim Panizel, Monika Pinchas
KEYWORDS:
Blind Adaptive Equalizers, Deconvolution, Inter-Symbol Interference (ISI), Convolutional Noise, Residual ISI
JOURNAL NAME:
Journal of Signal and Information Processing,
Vol.5 No.4,
November
13,
2014
ABSTRACT: Recently, two expressions
(for the noiseless and noisy case) were proposed for the residual inter-symbol
interference (ISI) obtained by blind adaptive equalizers, where the error of
the equalized output signal may be expressed as a polynomial function of order
3. However, those expressions are not applicable for biased input signals. In
this paper, a closed-form approximated expression is proposed for the residual
ISI applicable for the noisy and biased input case. This new proposed
expression is valid for blind adaptive equalizers, where the error of the
equalized output signal may be expressed as a polynomial function of order 3.
The new proposed expression depends on the equalizer’s tap length, input signal
statistics, channel power, SNR, step-size parameter and on the input signal’s
bias. Simulation results indicate a high correlation between the simulated
results and those obtained from our new proposed expression.