Implementation of some digital filtering algorithms in a DSP card for multifrequency signal analysis

摘要

Nowadays, signal processing is the most used tool in several practical applications. Particularly it leads greatly to the development of the telecommunication field. During the setting of the communication, a multifrequency signal is exchanged between the subscriber set and the telephone exchanges, which perform the analysis of the dual tone signal by means of a multifrequency receiver. This paper presents a signal processing application that relies on the detection of codes issued from subscriber sets using digital filtering algorithms implemented in a digital signal processing card, based on a fast processor 'TMS320.c30' in order to satisfy the real time constraint of this application.