NDLI: VFF l1-norm penalised WL-RLS algorithm using DCD iterations for underwater acoustic communication

Content Provider	IET Digital Library
Author	Liu, Lu Zhang, Youwen Sun, Dajun
Abstract	Based on dichotomous coordinate descent (DCD) iterations and with the use of the variable forgetting factor (VFF), a widely linear (WL) l1-norm recursive least squares (RLS) adaptive filtering algorithm is proposed for sparse underwater acoustic channelequalization. In the proposed l1-norm WL-RLS algorithm with VFF, the WL model is employed to exploit the second order statistics of the non-circular signals and the VFF is employed to improve the tracking ability of the RLS algorithms. DCD iterations are incorporated in the proposed l1-norm WL-RLS-DCD algorithm with VFF to reduce the computing complexity. Moreover, the proposed algorithms are employed by the direct adaptive decision feedback equalizer (DA-DFE). Numerical results indicate that compared with the conventional RLS, l1-norm RLS, WL-RLS with VFF, l1-norm WL-RLS-DCD algorithms, the proposed algorithms achieve a better performance in terms of the convergence rate, mean square errorand symbol error ratein the DA-DFE receiver. Experimental results also show that the proposed algorithms can promote the DA-DFE receiver to obtain a better performance in the sparse time-varying underwater acoustic communication system. Even though the transmitted signals are circular quadrature phase-shift keying (QPSK) through the underwater acoustic channel, the proposed adaptive RLS algorithms can still obtain a better performance.
Starting Page	615
Ending Page	621
Page Count	7
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 5, Mar (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.1012
Journal	IET Communications
Publisher Date	2016-12-02
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Acoustic And Other Telecommunication System And Equipment Adaptive Filter Circular Quadrature Phase-shift Keying DA-DFE Receiver DCD Iterations Dichotomous Coordinate Descent Iterations Direct Adaptive Decision Feedback Equaliser Filtering Method in Signal Processing Higher Order Statistics Interpolation And Function Approximation Iterative Method Modulation And Coding Method Numerical Analysis Quadrature Phase Shift Keying Second-order Statistics Sparse Time-varying Underwater Acoustic Communication System Statistics Time-varying Channel Underwater Acoustic Channel Underwater Acoustic Communication Variable Forgetting Factor VFF L1-norm Penalised WL-RLS Algorithm Widely Linear L1-norm Recursive Least-squares Adaptive Filtering Algorithm Wireless Channel
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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