Design of Sparse Filters by a Discrete Filled Function Technique

Zhi Guo Feng, Ka Fai Cedric Yiu, Soon Yi Wu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

In this paper, we consider the sparse filter design problem where some of the coefficients can be reduced to zeroes in order to lower implementation complexity. The objective is to choose the fewest number of nonzero filter coefficients to meet a given performance requirement. We formulate a discrete optimization problem to minimize the number of nonzero terms and develop a discrete search method to find the minimal nonzero terms. In each step, we need to consider a subproblem to design the filter coefficients with a given set of nonzero terms. We formulate this subproblem as a linear programming problem and apply an exchange algorithm to find the optimal coefficients. For illustration, we compare the proposed algorithm with existing methods and show that the proposed method gives better results in all our test cases.

Original languageEnglish
Pages (from-to)4279-4294
Number of pages16
JournalCircuits, Systems, and Signal Processing
Volume37
Issue number10
DOIs
Publication statusPublished - 22 Jan 2018

Keywords

  • Discrete search method
  • Filled function
  • Sparse filter design

ASJC Scopus subject areas

  • Signal Processing
  • Applied Mathematics

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