Ho, Charlotte Yuk-Fan and Ling, Wing-Kuen and Dam, Hai Huyen and Yeo, Kok-Lay (2011) Minimax passband group delay nonlinear FIR filter design without imposing desired phase response. In: 19th European Signal Processing Conference, August 29 - September 2 2011, Palau de Congressos de Catalunya.
|Item Type:||Conference or Workshop Item (Lecture)|
conference_optim_nonlinear_phase_filter.pdf - Whole Document
|Divisions:||College of Science > School of Engineering|
|Abstract:||In this paper, a nonlinear phase finite impulse response (FIR) filter is designed without imposing a desired phase response. The maximum passband group delay of the filter is minimized subject to a positivity constraint on the passband group delay response of the filter as well as a specification on the maximum absolute difference between the desired magnitude square response and the designed magnitude square response over both the passband and the stopband. This filter design problem is a nonsmooth functional ine-quality constrained optimization problem. To tackle this problem, first, the one norm functional inequality constraint of the optimization problem is approximated by a smooth function so that the nonsmooth functional inequality con-strained optimization problem is approximated as a noncon-vex functional inequality constrained optimization problem. Then, a modified filled function method is applied for find-ing the global minimum of the nonconvex optimization prob-lem. Computer numerical simulation results show that our designed nonlinear phase peak constrained FIR filter could achieve lower minimum passband group delay than those of existing designs.|
|Date Deposited:||05 Jun 2011 08:10|
Actions (login required)