Design of allpass variable fractional delay filter with signed powers-of-two coefficients
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 prob...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier BV
2014
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/43959 |
| 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. |
|---|