| 摘要: |
| 随着地面用频设备的不断增多，卫星通信受到的电磁干扰日益严重，从波束旁瓣进入的大电平干扰信号会造成极大的危害，导致接收信号信干噪比降低，信息无法解调。针对该问题提出了一种联立角度估计的和差波束干扰消除方法，一方面通过和波束及差波束估计出干扰信号的来波方向，另一方面基于估计结果利用和差波束的接收信号加权求和消除从旁瓣进入系统的干扰信号。仿真实验证明，所提方法能够有效抑制地球静止轨道（Geostationary Orbit,GEO）卫星地面站的旁瓣干扰，在低信噪比和强干扰条件下能够保持良好的性能，干扰抑制效果达到50 dB以上。 |
| 关键词: 卫星地面站 卫星信号 旁瓣干扰 和差波束 干扰对消 角度估计 |
| DOI：10.20079/j.issn.1001-893x.230718001 |
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| 基金项目: |
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| GEO Satellite Ground Station Jamming Cancellation Method Based on Sum Difference Beam with Simultaneous Angle Estimation |
| AN Jian,JI Tao,WANG Lei |
| (Unit 61096 of PLA,Beijing 102308,China) |
| Abstract: |
| With the increasing number of frequency equipment on the ground,the electromagnetic jamming of satellite communication is becoming more and more serious.The large level jamming entering from the beam sidelobe will cause great harm,resulting in the decrease of the signal-to-jamming-noise ratio of the received signal and the inability of demodulation of the information.In order to solve this problem,a jamming cancellation method based on sum difference beam with simultaneous angle estimation is proposed.On the one hand,the incoming wave direction of the jamming is estimated by sum and difference beam;on the other hand,based on the estimation results,weighted summation of the received signal of the sum and difference beam is used to eliminate the jamming entering the system from the sidelobe.The simulation experiments prove that the proposed method can effectively suppress the sidelobe jamming of geostationary orbit(GEO) satellite ground station.It can maintain good performance under low signal-to-noise ratio and strong jamming conditions,and the interference suppression effect reaches more than 50 dB. |
| Key words: satellite ground station satellite signal sidelobe jamming sum difference beam jamming cancellation angle estimation |
