考虑无线电波相位前球度的目标仰角根音测量

Q4 Physics and Astronomy
Y. Pedenko
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引用次数: 0

摘要

主题和目的。本文研究了根- music技术在海面低空雷达目标仰角测量中的有效性,特别是考虑了无线电波的相位前球度。目的是研究考虑相锋球度与传统的假设相锋为平面相锋的方法相比,是否可以提高测量精度,以及提高多少。方法和方法论。这项工作从计算机模拟开始,考虑了各种海洋粗糙度水平,并涵盖了一系列无线电波反射条件,从近镜面反射到海面的强漫反射。该模拟涉及远场区域内相对于接收阵列的大范围目标距离。结果。提出了一种考虑从目标到达的无线电波相前球度的新方法。对俯仰角测量的误差水平进行了估计,并与假设目标反射波为平面相位前的传统根- music方法进行了比较。这种比较涉及广泛的海面粗糙度水平和目标分离。结论。研究表明,考虑波前球度的根- music技术可以显著降低低空目标仰角测量误差。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ROOT-MUSIC MEASUREMENTS OF TARGET ELEVATION ANGLES WITH ACCOUNT OF RADIO WAVE’S PHASE FRONT SPHERICITY
Subject and Purpose. The paper is an effectiveness study of the root-MUSIC technique as applied to elevation angle measurements of low-altitude radar targets over the sea, specifically with account of the radio waves’ phase front sphericity. The purpose is to find out whether and how much can the measurement accuracy be improved through account of the phase front sphericity, as compared with the classical approach assuming a plane phase front. Methods and Methodology. The work proceeds from computer simulation, considering a variety of sea roughness levels, and covers a range of radio wave reflection conditions from a nearly specular return to strong diff use reflection from the sea surface. The simulation involves a wide range of target distances within the far-field region with respect to the receive array. Results. A new approach has been suggested for taking into account the phase-front sphericity of the radio waves arriving from the target. The level of errors of elevation angle measurements has been estimated and compared with such shown by the conventional root-MUSIC method which assumes a plane phase front for the waves reflected from the target. The comparison concerns a wide range of sea roughness levels and target separations. Conclusion. It has been established that the proposed version of the root-MUSIC technique which takes wave front sphericity into account can significantly reduce the errors in elevation angle measurements for low-altitude targets.
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来源期刊
Radio Physics and Radio Astronomy
Radio Physics and Radio Astronomy Physics and Astronomy-Physics and Astronomy (miscellaneous)
CiteScore
0.60
自引率
0.00%
发文量
18
审稿时长
8 weeks
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