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首页> 外文期刊>IEEE Transactions on Aerospace and Electronic Systems >Angular superresolution for phased antenna array by phase weighting
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Angular superresolution for phased antenna array by phase weighting

机译：通过相位加权的相控天线阵列角超分辨率

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In this paper, a new angular superresolution technique called Phase Weighting Superresolution Method (PWSM) is proposed. The method combines a phase weighting method and a nonlinear spectral estimation algorithm. It is used in conventional phased array radar for improving angle resolution. The motion compensation of radar target and an analysis of influence of component imperfection in the realization of the method are presented. To evaluate the performance of the proposed method, Monte Carlo simulation has been conducted to estimate the root mean square error (RMSE) of the angle estimates and the spatial resolution signal-to-noise ratio (SNR) threshold in the cases of both non-fluctuating targets and fluctuating targets. The simulation results have been compared to those of beam space MUSIC method and the Cramer-Rao lower bound (CRLB). Numerical and experimental results show that good angular superresolution and high estimation accuracy can be achieved provided that the radar pulse repetition time is small enough so that the echoes can be considered sufficiently correlated. For an X band conventional phased array radar with 139 antenna elements, by using PWSM the angular resolution is improved by a factor of 2 when SNR equals 15 dB
机译：在本文中，提出了一种新的角度超分辨率技术，称为相位加权超分辨率方法（PWSM）。该方法结合了相位加权方法和非线性频谱估计算法。它用于常规相控阵雷达中以改善角度分辨率。提出了雷达目标的运动补偿方法，并分析了该方法实现中部件缺陷的影响。为了评估该方法的性能，在两种情况下，均进行了蒙特卡罗模拟以估计角度估计的均方根误差（RMSE）和空间分辨率信噪比（SNR）阈值。波动的目标和波动的目标。仿真结果已与波束空间MUSIC方法和Cramer-Rao下界（CRLB）进行了比较。数值和实验结果表明，只要雷达脉冲的重复时间足够短，就可以实现良好的角度超分辨率和较高的估计精度，从而可以认为回波具有足够的相关性。对于具有139个天线单元的X波段常规相控阵雷达，通过使用PWSM，当SNR等于15 dB时，角分辨率提高了2倍。

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