An approach to weak signal extraction under ignorance of direction of arrival
Ning Liu, Yi Liu, Kai Chang, Xiang Yu Peng, Qun Wan · IET conference proceedings. · 2024
The radar working in the complex target environment and electromagnetic spectrum environment is affected by various jamming sources, which leads to the deterioration of its target detection performance. In the case of the antenna array and the radar colocated, the pulse signals radiated by the radar are much stronger than the signals radiated by the jamming source, and the two overlap in the time and frequency domain, where the pulse signals radiated by the radar are str ong and the signals radiated by the jamming source are weak, leading to difficulties in extracting the jamming source signals from the signals received by the antenna array. To solve this problem, this paper uses the known incoming direction of the radar signal to design an optimal spatial filter for extracting the jamming source signal, which is also known as weak signal.