MAGNITUDE RESPONSE OPTIMIZATION OF DELTA OPERATOR FILTERS
作者单位：Laboratory of Telecommunications TechnologyHelsinki University of Technology Laboratory of Signal Processing and Computer TechnologyHelsinki University of Technology
会议名称：《1996 3rd International Conference on Signal Processing(ICSP’96)》
会议日期：1996年
学科分类：080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学]
基 金：supported by the Nokia Foundation
关 键 词：Digital filters Quantization IIR filters Application specific integrated circuits Prototypes Narrowband Laboratories Signal processing Telecommunication computing Matched filters
摘 要：正Digital filters that use the delta operator have been shown to be less sensitive to filter coefficient quantization than filters using the shift operator when the poles and zeroes lie near the point z=±*** is customary to simply round the prototype filter coefficients to the nearest fixed-point numbers for the *** this paper,we show that when very few bits are allocated for each coefficient in a delta filter,some other quantized point than the directly rounded point is likely to offer magnitude response that more closely matches the required characteristics. Furthermore,a neighborhood search may even find a solution that fulfills the given specifications with fewer bits than by using direct *** is of particular importance in Application-Specific Integrated Circuit implementations where expensive die area can be saved by using fewer bits to represent a *** experiments also confirm the result that delta parameterization regularly requires at least two or three bits less than shift parameterization to fulfill the same narrowband filter specifications.