Reconstructing Discarded Signals from FMCW Radar Using Compressive Sensing

This study presents a method for reconstructing the target signal of a frequency-modulated continuous-wave (FMCW) radar when it is discarded. The beat frequency spectrum of the FMCW radar is sparse; thus, by applying compressive sensing, a high-dimensional frequency-domain signal can be reconstructed with a small number of time-domain measurements. After discarding the electromagnetic interference signals exceeding the critical value, the entire target signal is reconstructed using a randomly selected portion of the time-domain target signal from the non-discarded region. Jamming tests were conducted on the FMCW radar to simulate the discarding of target signals caused by electromagnetic interference. The entire target signal, including the discarded portions, was successfully reconstructed using compressive sensing.