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http://bura.brunel.ac.uk/handle/2438/10254
Title: | Steady-state performance of multimodulus blind equalizers |
Authors: | Azim, AW Abrar, S Zerguine, A Nandi, AK |
Keywords: | Blind equalization;Energy conservation theorem;Mean square error;Multimodulus algorithm;Quadrature amplitude modulation;Steady-state analysis;Tracking performance;Variance relation |
Issue Date: | 2015 |
Publisher: | Elsevier |
Citation: | Signal Processing, 2015, 108, pp. 509 - 520 |
Abstract: | Multimodulus algorithms (MMA) based adaptive blind equalizers mitigate inter-symbol interference in a digital communication system by minimizing dispersion in the quadrature components of the equalized sequence in a decoupled manner, i.e., the in-phase and quadrature components of the equalized sequence are used to minimize dispersion in the respective components of the received signal. These unsupervised equalizers are mostly incorporated in bandwidth-efficient digital receivers (wired, wireless or optical) which rely on quadrature amplitude modulation based signaling. These equalizers are equipped with nonlinear error-functions in their update expressions which makes it a challenging task to evaluate analytically their steady-state performance. However, exploiting variance relation theorem, researchers have recently been able to report approximate expressions for steady-state excess mean square error (EMSE) of such equalizers for noiseless but interfering environment. In this work, in contrast to existing results, we present exact steady-state tracking analysis of two multimodulus equalizers in a non-stationary environment. Specifically, we evaluate expressions for steady-state EMSE of two equalizers, namely the MMA2-2 and the βMMA. The accuracy of the derived analytical results is validated using different set experiments and found in close agreement. |
Description: | This article has been made available through the Brunel Open Access Publishing Fund. |
URI: | http://bura.brunel.ac.uk/handle/2438/10254 |
DOI: | http://dx.doi.org/10.1016/j.sigpro.2014.10.020 |
ISSN: | 0165-1684 |
Other Identifiers: | S0165168414004848 S0165168414004848 |
Appears in Collections: | Brunel OA Publishing Fund Dept of Electronic and Electrical Engineering Research Papers |
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