Title :
Canonical signed digit representation for FIR digital filters
Author :
Hewlitt, Reid M. ; Swartzlantler, E.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Abstract :
It is shown that the use of a canonical signed digit (CSD) representation of the filter coefficients can significantly reduce the complexity of the hardware implementation of digital FIR filters. This paper presents an example filter design that shows the error involved in limiting the number of allowable non-zero CSD coefficients for a real FIR bandpass filter. If not done carefully, brute force limiting can lead to large errors in the frequency response. The error is evaluated for varying numbers of non-zero CSD coefficients. Lastly, a system level architecture with a multiplier utilizing the properties of the CSD number representation system is proposed
Keywords :
FIR filters; band-pass filters; digital filters; frequency response; multiplying circuits; network synthesis; CSD number representation system; FIR bandpass filter; FIR digital filters; FIR filter design; brute force limiting; canonical signed digit representation; filter coefficients; frequency response errors; hardware implementation reduction; nonzero CSD coefficients; system level architecture; Band pass filters; Digital filters; Encoding; Finite impulse response filter; Flowcharts; Frequency response; Hardware; IIR filters; Kernel; Quantization;
Conference_Titel :
Signal Processing Systems, 2000. SiPS 2000. 2000 IEEE Workshop on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-7803-6488-0
DOI :
10.1109/SIPS.2000.886740
