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Target Azimuth Estimation in Phased Array Radar Using Detected Powers from Main and Side Lobes

机译:利用来自主瓣和副瓣的检测功率,相控阵雷达的目标方位角估计

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Target azimuth estimation in phased array radar with fixed antenna panel uses normally algorithms that act upon detected samples restricted to those from the main lobe of the antenna. The algorithms are mostly based on centroid methods that performs weighted average to calculate the center of intensity as the target azimuth. This paper presents a new algorithm to estimate target azimuth from all detected signals from main and side lobes acquired during antenna scanning. The algorithm estimates the target azimuth by finding the estimator of least variance. The estimators are defined to cover the range of all possible azimuth output, and are defined via a mathematical operation that includes the detected powers and reference prior-calculated powers. It is proven analytically that (always) the estimator that corresponds to the azimuth closest to the target azimuth contains the least variance. The simulations says the algorithm is more precise than the centroid algorithm.
机译:具有固定天线面板的相控阵雷达中的目标方位角估计通常使用算法,该算法对检测到的样本(仅限于来自天线主瓣的样本)起作用。该算法主要基于质心方法,该方法执行加权平均以计算强度中心作为目标方位角。本文提出了一种新算法,可从在天线扫描期间获取的来自主瓣和旁瓣的所有检测信号中估计目标方位角。该算法通过找到最小方差的估算器来估算目标方位角。估计器被定义为覆盖所有可能的方位角输出的范围,并通过数学运算来定义,该数学运算包括检测到的功率和参考先前计算出的功率。通过分析证明,(始终)与最接近目标方位角的方位角对应的估计量方差最小。仿真表明,该算法比质心算法更精确。

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