| 摘要: |
| 针对通信系统中多径干扰难以估计和抑制的问题，提出了一种地面采用智能天线自适应跟踪的方法。以均匀直线阵为基础，采用前后向空间平滑算法对阵列接收相干信号进行预相干处理，再利用MUSIC（Multiple Signal Classification）算法实现信号来波方向（Direction of Arrival，DOA）估计，应用一种新的对角加载稳健波束形成技术减小主峰偏移，实现多径干扰抑制。仿真分析验证了所提算法的正确性和有效性，系统具有良好的稳健性，具有较高的工程实践价值。 |
| 关键词: 无人机测控通信 多径干扰抑制 空间平滑 稳健波束形成 智能天线 |
| DOI： |
|
| 基金项目:国家重点研发计划项目（2016YFB0502600） |
|
| A robust method of multipath estimation and multipath suppression |
| LI Pingmin,LIANG Xiuyan,ZHU Tielin,ZOU Quanbo |
| (1.Tianjin Zhongwei Aerospace Data System Technology Co.,Ltd.,Tianjin 300301，China;2.Space Star Technology Co.,Ltd.,Beijing 100086,China) |
| Abstract: |
| For the difficulty of multipath interference estimation and suppression in a communication system,a method of smart antenna is developed to solve the adaptive tracking problem.Based on uniform linear array,the received coherent array signals are preprocessed by adopting forward-backward spatial smoothing technique.By applying multiple signal classification(MUSIC) algorithm,direction of arrivals of coherent signals are estimated properly,a novel diagonal loading robust beamforming technique is proposed to diminish the deviation of mainlobe and effectively suppress multipath interference.Theoretical analysis and simulation indicate the correctness and effectiveness of the method and the system using this method has ideal stability and high engineering application value. |
| Key words: UAV TT&C;multipath interference suppression spatial-smoothing robust beamforming smart antenna |
《电讯技术》编辑部 