摘要
均匀圆阵(UCA)与多输入多输出(MIMO)雷达的结合可在具备UCA雷达主要优点的同时兼有MIMO雷达的优势。然而,UCA-MIMO雷达的波束形成与距离无关,该特点限制了其抑制特定距离干扰的性能。文中提出频率分集UCA-MIMO雷达距离依赖波束形成方法。该方法中UCA的每个阵元发射具有微小频率步进的不同频率,从而远场的信号积累与距离有关,进而波束形成依赖于距离。仿真实验表明了该方法的有效性。
The combination of conventional uniform circular array （ UC$ } and multiple-input and multiple-output { MIMO） radar leads to a flexible technique which enjoys the advantages of MIMO radar without sacrificing the main advantage of UCA radar. However, the UCA MIMO radar is limited to range-independent directivity ; this limits the radar performance to mitigate non-desira- ble range-dependent interferences. In this paper, a new UCA MIMO radar with frequency diversity for range-dependent beamform- ing is proposed. The essence of the proposed method is each element of the UCA transmits a distinct waveform with a small fre- quency increment, the summation of signals in far-field has relationship with distance. Thus the beanlforming is range-dependent. The effectiveness of the proposed technique is verified by numerical simulation results.
出处
《现代雷达》
CSCD
北大核心
2015年第11期42-47,共6页
Modern Radar
基金
航空科学基金资助项目(20142056005)
关键词
波束形成
频率分集
均匀圆阵
多输入多输出雷达
距离依赖
beamforming
frequency diversity~ uniform circular array
multiple-input and multiple-output radar
range dependent
