Abstract: For the purpose of improving the angle measurement performance in the case of multiple targets, a modified monopulse method is proposed. Instead of using the discrete Fourier transform (DFT) filters, the proposed method uses some special Doppler filters to process the received data according to target' Doppler frqeuency. Then the processed data are used by the monopulse method to measure the angle. Because the special Doppler filters can greatly reduce the influences between targets, the proposed method performs significantly better than the conventional monpulse method. Simulation results show its merits.

Key words: angle measurement, monopulse method, Doppler filtering