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    • 2. 发明授权
    • Apparatus and method for two stage hybrid space-time adaptive processing in radar and communication systems
    • 雷达和通信系统中两级混合时空自适应处理的装置和方法
    • US06252540B1
    • 2001-06-26
    • US09468044
    • 1999-12-21
    • Todd B. HaleMichael C. WicksRaviraj S. Adve
    • Todd B. HaleMichael C. WicksRaviraj S. Adve
    • G01S7292
    • G01S13/524G01S7/2921
    • A Two-Stage Hybrid algorithm offers significant improvement in the false alarm rate and detection performance of Space-Time Adaptive Processing in non-homogeneous environments for both radar and digital communications. The first stage analyzes data from a range cell of interest by direct data domain processing, suppressing discrete interferers within the range cell of interest. The second stage implements a purely statistical STAP algorithm, preferably an enhanced version of the Joint-Domain Localized (“JDL”) statistical algorithm. For radar this second stage estimates the interference within the range cell of interest from the surrounding range cells. For a communications system, the second stage estimates the covariance matrix of the interference from the entire data block. For both radar and communications, an adaptive filter that suppresses the interference is generated from the estimate by second-order statistics. The present invention is the first two-dimensional STAP technique; all prior-art is one-dimensional.
    • 两级混合算法在雷达和数字通信的非均匀环境中提供了空间自适应处理的虚警率和检测性能的显着改进。 第一阶段通过直接数据域处理分析来自感兴趣的范围单元的数据,抑制感兴趣的范围单元内的离散干扰源。 第二阶段实现了一种纯统计的STAP算法,最好是联合域定位(“JDL”)统计算法的增强版本。 对于雷达,第二阶段估计来自周围范围单元的感兴趣范围单元格内的干扰。 对于通信系统,第二级估计来自整个数据块的干扰的协方差矩阵。 对于雷达和通信两者,通过二阶统计量的估计产生抑制干扰的自适应滤波器。 本发明是第一种二维STAP技术; 所有现有技术都是一维的。
    • 7. 发明申请
    • Generalized inner product method and apparatus for improved detection and discrimination
    • 广泛的内部产品方法和装置,用于改进检测和辨别
    • US20100245157A1
    • 2010-09-30
    • US12584590
    • 2009-08-25
    • Michael C. WicksYuhong Zhang
    • Michael C. WicksYuhong Zhang
    • G01S13/52
    • G01S13/5248
    • Method and apparatus for improving the detection and discrimination of slow moving or stationary range-Doppler spread objects on or in close proximity to the ground (or sea surface). Invention detects, discriminates and separates radar returns from interference including ground clutter discretes via a coherent process for separating target returns from the myriad of received signals. Thus the method and apparatus improves the probability of detecting and declaring the presence or absence of an object at the same time that the probability of false declaration decreases. The method and apparatus may be applied to the processing of any over resolved object, including airborne radar.
    • 用于改善在或接近地面(或海面)上的慢移或稳定范围 - 多普勒扩散物体的检测和辨别的方法和装置。 本发明通过用于从无数接收信号分离目标返回的相干过程来检测,鉴别和分离雷达回波与包括地面杂波离散的干扰。 因此,该方法和装置提高了在虚假声明的概率降低的同时检测和声明对象的存在或不存在的概率。 该方法和装置可以应用于任何过度分辨的物体(包括机载雷达)的处理。
    • 9. 发明授权
    • Waveform diversity for spatial-temporal denial of radar and communication system
    • 雷达和通信系统时空拒绝的波形多样性
    • US06204797B1
    • 2001-03-20
    • US09330928
    • 1999-06-11
    • Michael C. WicksScott M. BolenRussell D. Brown
    • Michael C. WicksScott M. BolenRussell D. Brown
    • G01S736
    • H04B7/0615G01S7/2813G01S7/282G01S7/36H04B7/0617
    • Spatial-temporal waveform diversity methods vary or modulate the far-field radiated waveform of a radar and/or communication antenna as a function of look direction (sidelobe structure). Radar detection performance and angle of arrival estimation are enhanced to deny a coherent reference to non-cooperative bistatic radars and coherent repeater jammer systems. In the most general case, the spatial-temporal modulated waveform varies as a function of angle, based upon the principles of multi-dimensional Fourier synthesis. Spatial-temporal denial is achieved with as few as two auxiliary antennas bracketing a main antenna. The same methods for spatial-temporal waveform diversity can also embed communications signals into the transmitted radar waveform for one-way simulcast of both waveform types. These same directionally dependent simulcast waveforms can incorporate navigation signals for enhanced precision engagement.
    • 空间 - 时间波形分集方法根据外观方向(旁瓣结构)改变或调制雷达和/或通信天线的远场辐射波形。 增强了雷达检测性能和到达角估计,以拒绝对非合作双基地雷达和相干中继干扰系统的一致参考。 在最普遍的情况下,空间 - 时间调制波形根据多维傅里叶合成的原理,作为角度的函数而变化。 空间时间拒绝是通过将两个辅助天线包围主天线来实现的。 空间 - 时间波形分集的相同方法还可以将通信信号嵌入到发射的雷达波形中,用于两种波形类型的单向同时播放。 这些相同的方向依赖的联播波形可以包含导航信号,以提高精确度的参与。