The aim of the paper is to demonstrate the possibility of using Personal Computer PC‐DOS (or generally MS‐DOS) for real time (or quasi real time) signal processing of serial data adding a simple A/D conversion card and the mathematical co‐processor XXX87. We have realized an assembly written FFT routine derived from a radix‐4 algorithm by Morris (1979). This algorithm is an autogenerated algorithm. This means that it is modified by another running off‐line algorithm according to the number of FFT points. The program is organized as subroutine to be called by high level language in different procedures. This approach reduces the computational time which is particularly useful when many Fourier transforms on different data array are required. Here reported are two biomedical applications of the routine for the spectral analysis of Doppler ultrasound velocimetry and for the surface electromiography (E.M.G.).
ASJC Scopus subject areas
- Electrical and Electronic Engineering