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Vol. 171, Issue 5, May 2014, pp. 32-42




Efficient Algorithms and Design for Interpolation Filters in Digital Receiver
1 Xiaowei  Niu, 2 Zhiming He, 3 Liwan Chen , 4Qiang Chen, 5Hui Xie

1,2 School of Electronic Engineering, University of Electronic Science

and Technology of  China, Chengdu city, Sichuan 611731, China

1,3,4,5 School of Electronic and information engineering Chongqing

ThreeGorges University, Zip code, 404000, Wan Zhou, China.
Tel.: 15923892350

* E-mail: nxw4525@126.com


Received: 11 March 2014 /Accepted: 30 April 2014 /Published: 31 May 2014

Digital Sensors and Sensor Sysstems


Abstract: Based on polynomial functions this paper introduces a generalized design method for interpolation filters. The polynomial-based interpolation filters can be implemented efficiently by using a modified Farrow structure with an arbitrary frequency response, the filters allow many pass- bands and stop-bands, and for each band the desired amplitude and weight can be set arbitrarily. The optimization coefficients of the interpolation filters in time domain are got by minimizing the weighted mean squared error function, then converting to solve the quadratic programming problem. The optimization coefficients in frequency domain are got by minimizing the maxima (MiniMax) of the weighted mean squared error function. The degree of polynomials and the length of interpolation filter can be selected arbitrarily. Numerical examples verified the proposed design method not only can reduce the hardware cost effectively but also guarantee an excellent performance.


Keywords: Polynomial-based filter, Modified Farrow structure, Interpolation, Basis function, Variable fractional delay.


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