| Paper: | DISPS-P1.5 | ||
| Session: | VLSI Algorithms and Architectures for DSP | ||
| Time: | Friday, May 21, 09:30 - 11:30 | ||
| Presentation: | Poster | ||
| Topic: | Design and Implementation of Signal Processing Systems: Algorithm Transformation and Mapping Techniques | ||
| Title: | QUANTIZATION EFFECT ON PHASE RESPONSE AND ITS APPLICATION TO MULTIPLIERLESS ANC | ||
| Authors: | Yunhua Wang; University of Oklahoma | ||
| Linda DeBrunner; University of Oklahoma | |||
| Victor DeBrunner; University of Oklahoma | |||
| Dayong Zhou; University of Oklahoma | |||
| Abstract: | Adaptive filtering is a widely used technique in active noise control (ANC). In order to make the adaptive filter in an FXLMS ANC system stable, the reference signal must pass through an estimation filter whose phase response is within ±90° of the phase of the secondary path. In this paper, we study the quantization effects on the filter phase response and the relationship between the phase response and the location of the zeros and poles. In addition, we propose a filter structure and nonuniform quantization method in which we quantize the filter coefficients so they each contain a small number of nonzero bits based on the distance of the zeros/poles to the unit circle to guarantee that the ±90° allowable phase deviation is met — greatly reducing the implementation cost. We combine these ideas with that of multiplierless implementations of adaptive FIR filters to realize an efficient active noise control using field programmable gate arrays or other digital hardware. | ||
| Back | |||
Home -||-
Organizing Committee -||-
Technical Committee -||-
Technical Program -||-
Plenaries
Paper Submission -||-
Special Sessions -||-
ITT -||-
Paper Review -||-
Exhibits -||-
Tutorials
Information -||-
Registration -||-
Travel Insurance -||-
Housing -||-
Workshops