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Radar phase noise modeling and effects???part I: MTI filters

机译:雷达相位噪声建模和影响第一部分:MTI滤波器

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摘要

Random and unwanted fluctuations, which perturb the phase of an ideal reference sinusoidal signal, may cause significant performance degradation in radar systems exploiting coherent integration techniques. To quantify the resulting performance loss, we develop a fast-time/slow-time data matrix radar signal representation, modeling the undesired phase fluctuations via multivariate circular distributions and describing the phase noise power spectral density (PSD) through a composite power-law model. Hence, we accurately predict the performance degradation experienced by moving target indication (MTI) algorithms for clutter cancellation, providing a closed form expression for the improvement factor I. The subsequent analysis shows that phase noise affects I directly through its characteristic function (CF). Additionally, I shares a robust behavior with respect to the actual phase noise multivariate circular distribution, as long as the phase noise PSD correctly represents the available measurements.
机译:扰动理想参考正弦信号相位的随机和不希望有的波动,可能会导致在采用相干积分技术的雷达系统中性能显着下降。为了量化由此造成的性能损失,我们开发了快速/慢速数据矩阵雷达信号表示,通过多元圆形分布对不期望的相位波动进行建模,并通过复合幂律模型描述了相位噪声功率谱密度(PSD) 。因此,我们准确地预测了用于消除杂波的移动目标指示(MTI)算法所经历的性能下降,为改进因子I提供了封闭形式。后续分析表明,相位噪声会通过其特征函数(CF)直接影响I。此外,只要相位噪声PSD正确表示可用的测量值,我就实际的相位噪声多元圆形分布具有鲁棒的行为。

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