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Comments on "Design of fractional-order variants of complex LMS and NLMS algorithms for adaptive channel equalization"
Journal article   Peer reviewed

Comments on "Design of fractional-order variants of complex LMS and NLMS algorithms for adaptive channel equalization"

Shujaat Khan, Abdul Wahab, Imran Naseem and Muhammad Moinuddin
Nonlinear dynamics, Vol.101(2), pp.1053-1060
01/07/2020
DOI: https://doi.org/10.1007/s11071-020-05850-w

Abstract

Engineering Engineering, Mechanical Mechanics Science & Technology Technology
The purpose of this note is to discuss some aspects of recently proposed fractional-order variants of complex least mean square (CLMS) and normalized least mean square (NLMS) algorithms in Shah et al. (Nonlinear Dyn. 88(2):839-858, 2017). It is observed that these algorithms do not always converge, whereas they have apparently no advantage over the CLMS and NLMS algorithms whenever they converge. Our claims are based on analytical reasoning and are supported by numerical simulations.

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