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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Calibration and Evaluation of a Circular Antenna Array for HF Radar Based on AIS Information
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Calibration and Evaluation of a Circular Antenna Array for HF Radar Based on AIS Information

机译：基于AIS信息的HF雷达圆形天线阵列的校准和评估

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摘要

High-frequency (HF) ground-wave radars employing compact antenna arrays are advantageous in practical applications because of their convenient deployment. However, the direction-of-arrival (DOA) estimation accuracy may significantly degrade in the presence of array errors for compact phased-array HF radars. Consequently, wind, wave, and current measurements would become unavailable for further applications. In this letter, an array calibration method is proposed for an HF radar system based on a circular antenna array. First, an array manifold model containing array errors is established. Second, a calibrated array manifold is obtained by fitting and interpolating the responses of ship echoes using a least squares fitting method. Finally, the calibrated array manifold and the noise subspace matrix are substituted into the multiple signal classification (MUSIC) method to estimate the DOA of each ship echo. The results indicate that this calibration method significantly reduces the DOA estimation errors with the root-mean-square errors of less than 10 degrees.
机译：采用紧凑型天线阵列的高频（HF）接地波雷达在实用应用中是有利的，因为它们的部署方便。然而，到达方向（DOA）估计精度可能在具有紧凑阶段阵列HF雷达的阵列误差的情况下显着降低。因此，对于进一步的应用，风力，波和电流测量将变得不可用。在这封信中，提出了一种基于圆形天线阵列的HF雷达系统的阵列校准方法。首先，建立包含阵列错误的阵列歧管模型。其次，通过使用最小二乘拟合方法拟合和插入船回波的响应来获得校准的阵列歧管。最后，校准的阵列歧管和噪声子空间矩阵被替换为多个信号分类（音乐）方法，以估计每个船舶回波的DOA。结果表明，这种校准方法显着降低了DOA估计误差，具有小于10度的根均方误差。

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