Improvement of target resolution in azimuth by LMMSE technique
Improvement of target resolution in azimuth by LMMSE technique
复制标题
利用LMMSE技术提高目标方位分辨率
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
P. van Genderen
中科院分区：
文献类型：
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作者：
M. Ruggiano;E. Stolp;P. van Genderen
方位向目标分离在雷达的许多应用中具有重要意义。方位分辨率由天线波束宽度决定。然而，在实践中，标准的信号处理技术要求目标之间的距离是一个以上的分辨率单元。这对于几个相关的应用来说可能是不够的。本文研究了提高旋转监视雷达方位分辨率的问题。一个数据模型的情况下，描述和一个新的应用程序的线性最小均方误差（LMMSE）处理技术进行评估。所使用的天线方向图是从真实的测量中获得的，并且所接收的信号被合成以产生具有比分辨率单元更小和更大的间隔的目标轮廓。结果表明，这种技术的能力，分离目标的方位间距接近或超过一个方位分辨率单元。该处理方案相对于标准技术在分辨率能力方面显示出很大的改进。
Azimuth target separation is of crucial importance in many applications of radar. The azimuth resolution is determined by the antenna beamwidth. However, in practice, standard signal processing techniques require the distance between targets to be more than one resolution cell. This can prove inadequate for several relevant applications. In this paper the problem of improving the azimuth resolution for rotating surveillance radar is addressed. A data model for the case is described and a novel application of the linear minimum mean square error (LMMSE) processing technique is evaluated. The antenna pattern used is obtained from real measurements and the received signal is synthesized to produce target profiles with spacing smaller and larger than the resolution cell. Results show the capabilities of this technique of separating targets in azimuth spaced closer or further than one azimuth resolution cell. The processing scheme shows a large improvement in the resolution capability with respect to standard techniques.