Title :
Direct form revisited: recursive filter implementation using higher-order direct form sections
Author :
Laakso, Timo ; Hartimo, Iiro
Author_Institution :
Lab. of Comput. & Inf. Sci., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
The cascade implementation of recursive digital filters using fourth-order direct form sections is investigated. The implementation with TMS320 processors is studied in detail. The finite-wordlength performance and the implementation costs of six different test filters are compared. It is concluded that the cascade of fourth-order direct form sections with second-order error feedback provides a very effective and low-noise structure for signal processor implementation, except with very narrowband filters.<>
Keywords :
cascade networks; digital filters; feedback; microcomputer applications; TMS320 processors; cascade implementation; digital filters; finite-wordlength performance; fourth-order; higher-order direct form sections; implementation costs; low-noise structure; recursive filter implementation; second-order error feedback; signal processor implementation; Digital filters; Feedback; Finite impulse response filter; Hardware; IIR filters; Noise reduction; Quantization; Sections; Signal processing; Testing;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo, Finland
DOI :
10.1109/ISCAS.1988.15044
