Design and Implementation of a Low-Complexity Continuously Variable Digital Filter Using a Novel Farrow-Equivalent-Newton Structure-Based Fractional Delay Filter

IF 5.2 1区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
T. C. Jayasree;J. C. Suneina;T. Bindima;M. P. Gilesh
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引用次数: 0

Abstract

Variable filters with adjustable bandwidth are vital components in diverse communication scenarios. This paper presents an innovative architecture for a continuously variable bandwidth filter using a fixed hardware. Our approach integrates a fixed finite impulse response filter between two arbitrary fractional delay filters implemented through a novel Farrow-equivalent-Newton structure. The proposed architecture provides a low-complexity implementation structure compared to the state-of-the-art approaches. A precise mapping equation for the edge frequencies of the filters generated from the proposed continuously variable bandwidth filter, in terms of a variable parameter called the resampling ratio, is also formulated. Validation experiments encompass the design of continuously variable bandwidth filters tailored to various wireless communication standards. The hardware utilization report of the proposed continuously variable bandwidth filter obtained by synthesizing the structure using Xilinx Vivado 2020.2 on a Kintex-7 device is also included, which proves the hardware complexity reduction and efficiency of the proposed structure.
基于新型Farrow-Equivalent-Newton结构的分数阶延迟滤波器的低复杂度连续可变数字滤波器的设计与实现
带宽可调的可变滤波器是各种通信场景中的重要组成部分。本文提出了一种基于固定硬件的连续可变带宽滤波器的创新结构。我们的方法在两个任意分数阶延迟滤波器之间集成了一个固定的有限脉冲响应滤波器,该滤波器通过一种新颖的Farrow-equivalent-Newton结构实现。与最先进的方法相比,所建议的体系结构提供了一个低复杂性的实现结构。由所提出的连续可变带宽滤波器产生的滤波器的边缘频率的精确映射方程,根据一个称为重采样比的可变参数,也被制定。验证实验包括针对各种无线通信标准定制的连续可变带宽滤波器的设计。文中还给出了基于Xilinx Vivado 2020.2在Kintex-7设备上合成该结构的连续可变带宽滤波器的硬件利用率报告,证明了该结构降低了硬件复杂度和效率。
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来源期刊
IEEE Transactions on Circuits and Systems I: Regular Papers
IEEE Transactions on Circuits and Systems I: Regular Papers 工程技术-工程:电子与电气
CiteScore
9.80
自引率
11.80%
发文量
441
审稿时长
2 months
期刊介绍: TCAS I publishes regular papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: - Circuits: Analog, Digital and Mixed Signal Circuits and Systems - Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic - Circuits and Systems, Power Electronics and Systems - Software for Analog-and-Logic Circuits and Systems - Control aspects of Circuits and Systems.
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