Detection of interference in main lobe for two-dimensional monopulse antenna

In this paper, an interference detection and angle estimation algorithm for two-dimensional monopulse antenna is proposed to solve the problem that the interference in the main lobe is difficult to be detected. Only the sum signal, difference signal and noise variance are required in this algorithm. We use the generalized likelihood ratio criterion (GLRT) to obtain a detection statistic, compare this statistic with the set threshold, and then realize the detection of interference according to the comparison result. The angle estimation formula is further derived. Simulation results show that the performance of interference detection and angle estimation is well achieved.