Abstract
Although the number of ways of describing a given signal is countless, the most important
and fundamental variables in nature are time and frequency. While the time domain function
indicates how the signal's amplitude changes over time, the frequency domain function tells
how often such changes take place. The bridge between time and frequency is the Fourier
transform. One of the important applications of time-frequency transform is the detection and
extraction of a radar signal immersed in noise jamming. In this paper a new technique dealing
with improvement of radar performance under jamming conditions is presented. This new
technique of time-frequency processing with non-linear threshold level is applied to a chirp
radar pulse imbedded in a high level noise. A software program is built using MATLAB
program.
This paper also introduced a real-time implementation of the proposed model. The real-time
implementation is done based on input/output data acquisition card using MATLAB,
SIMULINK toolbox, Real-Time Workshop (RTW) toolbox and Real-Time Windows target
(RTWT) toolbox. In addition, real-time windows target requires the Watcom C/C++
compiler.