Angle Estimation Using Wideband Frequency Modulation and an Active Distributed Array
Angle Estimation Using Wideband Frequency Modulation and an Active Distributed Array
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DOI：
10.1109/lmwc.2018.2873249
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发表时间：
2018-10
影响因子：
3
通讯作者：
Stavros Vakalis;Eric Klinefelter;J. Nanzer
中科院分区：
文献类型：
--
作者：
Stavros Vakalis;Eric Klinefelter;J. Nanzer
提出了一种利用宽带波形和分布式阵列接收机进行目标角度估计的新方法。分布式阵列接收器生成栅瓣图案，其空间分布相位作为频率的函数而改变。通过实现宽带线性调频波形，相位响应体现在分布式阵列接收机输出中，其瞬时频率与对象的角度成比例。接收机的频率响应，推导出的角度估计方法进行了实验证明。一个4.8 GHz的分布式阵列雷达实现了接收机基线为19.36\lambda $使用的波形调制超过2 GHz的带宽。对单点目标进行了测量，测得的频率响应显示了与目标角度的预期对应关系，平均误差为2.8°（0.049 rad），标准差为1.8°（0.031 rad）。
A new method of target angle estimation, which leverages wideband waveforms and a distributed array receiver, is presented. The distributed array receiver generates a grating lobe pattern, the spatially distributed phase of which changes as a function of frequency. By implementing a wideband linear frequency modulated waveform, a phase response manifests in the distributed array receiver output, whose instantaneous frequency is proportional to the angle of the object. The receiver frequency response is derived, and the angle estimation approach is experimentally demonstrated. A 4.8-GHz distributed array radar was implemented with a receiver baseline of $19.36\lambda $ using a waveform modulated over 2 GHz of bandwidth. Measurements with a single-point target were conducted, and the measured frequency responses show the expected correspondence to the angle of the target with an average error of 2.8° (0.049 rad) and a standard deviation of 1.8° (0.031 rad).