A High-Precision Interference Sources Location Method Based on Satellite-Based Multi-Feeder Antenna

Signal interference seriously restricts the service capability of communication satellites. The accurate location of interference sources is the key step to solve the interference of communication systems. At present, the satellite mainly uses the multi-beam amplitude comparison to locate the target, the positioning accuracy is low, and the multi-target measurement depends on the pre-signal sorting. With the development of payload technology, multi-beam of satellite can be generated by multi-feeder antenna, and the coherence between feed signals can bring higher precision on DOA measurement. In this paper, a method of interference source location based on multi-feed antenna is proposed. Firstly, multi-beam data acquisition is realized by using beamforming network, and then the signal of each feed channel is estimated through integrated channel signal. Finally, the multi-target DOA estimation and location is realized by using MUSIC technology. The simulation results show that the proposed method can realize multi-target DOA estimation with higher accuracy than the conventional amplitude method.