Range-Angle Localization of Targets by A Double-Pulse Frequency Diverse Array Radar
Range-Angle Localization of Targets by A Double-Pulse Frequency Diverse Array Radar
复制标题
双脉冲频率不同阵列雷达对目标进行距离角定位
DOI：
10.1109/jstsp.2013.2285528
复制
发表时间：
2014-02-01
影响因子：
7.5
通讯作者：
Shao, Huaizong
中科院分区：
文献类型：
--
作者：
Wang, Wen-Qin;Shao, Huaizong
相控阵雷达被广泛用于非合作目标的定位，但由于其固有的距离模糊，不能直接从波束形成输出中估计目标的距离和角度，即不能直接从传统的线性相控阵雷达波束形成峰值获得非合作目标的二维定位。提出了一种利用均匀线阵(ULA)双脉冲频率分集阵列(FDA)雷达对目标进行简单距离角定位的方法。FDA分别以零频率增量和非零频率增量发射两个脉冲。然后根据波束形成的输出峰值直接估计目标的方位角和倾斜距离。这种方法可以理解为在角度维度上检测目标，然后通过适当选择频率增量在距离维度上对目标进行定位。此外，多个FDA雷达可以组成组网雷达网，其中采用不同的频率增量或正交波形。通过分析Cramér-Rao下界和数值均方误差来检验定位性能。仿真结果表明了该方法的有效性。
Phased-array radar is widely used in localizating non-cooperative targets, but the range and angle of targets cannot be directly estimated from its beamforming output due to an inherent range ambiguity, i.e., two-dimensional localization of non- cooperative targets cannot be obtained directly from conventional linear phased-array radar beamforming peaks. This paper proposes a simple range-angle localization of targets by uniform linear array (ULA) double-pulse frequency diverse array (FDA) radar. The FDA transmits two pulses with zero and non-zero frequency increments, respectively. The azimuth angle and slant range of targets are then estimated directly from the beamforming output peaks. This approach can be interpreted as detecting the targets in angle dimension and then localizing them in range dimension by properly choosing the frequency increment. Moreover, multiple FDA radars can work as netted radar networks, in which distinct frequency increments or orthogonal waveforms are employed. The localization performance is examined by analyzing the Cramér-Rao lower bound (CRLB) and numerical mean square error (MSE). The effectiveness is demonstrated by simulation results.