Constructing Radar Echoes Using Linear Frequency Modulated Signals

We can utilize linear frequency modulated (LFM) signals to construct radar echoes and process them in both range and Doppler dimensions. LFM signals represent a specialized signal processing technique achieved by varying the frequency within the transmitted signal. In radar systems, we leverage the unique properties of LFM signals to extract target distance and velocity information. Through range-dimension processing (typically implemented via matched filtering or pulse compression algorithms) and Doppler-dimension processing (commonly using FFT-based spectral analysis), we can further analyze target motion characteristics and signatures. This signal processing methodology holds significant application value in radar technology, particularly for target detection, tracking, and identification systems. Implementation typically involves generating LFM waveforms using MATLAB's chirp function or similar programming constructs, followed by correlation processing for range resolution and Doppler FFT analysis for velocity estimation.