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Design of allpass variable fractional delay filter with signed powers-of-two coefficients

Author:
Yu, Changjun   Teo, Kok Lay   Dam, Hai Huyen  


Journal:
Signal Processing


Issue Date:
2014


Abstract(summary):

This paper investigates the optimal design of allpass variable fractional delay (VFD) filters with coefficients expressed as sums of signed powers-of-two terms, where the weighted integral squared error is the cost function to be minimized. The design can be classified as an integer programming problem. To solve this problem, a new procedure is proposed to generate a reduced discrete search region to decrease the computational complexity. A new exact penalty function method is developed to solve the optimal design problem for allpass VFD filter with signed powers-of-two coefficients. Design examples show that the proposed method can achieve a higher accuracy when compared with the quantization method. [All rights reserved Elsevier].


Page:
32-42


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