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1. 发明授权

US06232922B1 Passive three dimensional track of non-cooperative targets through opportunistic use of global positioning system (GPS) and GLONASS signals 有权
标题翻译：通过机会主义使用全球定位系统（GPS）和GLONASS信号，实现非合作目标的被动三维轨迹
公开(公告)号：US06232922B1
公开(公告)日：2001-05-15
申请号：US09310808
申请日：1999-05-12
申请人： John C. McIntosh
发明人： John C. McIntosh
IPC分类号： G01S302
CPC分类号： G01S13/878 , G01S3/02 , G01S13/586 , G01S19/14 , G01S2013/9058
摘要： A method and apparatus for utilization of GPS, GLONASS or other existing RF signals is disclosed. These existing RF signals are scattered by targets, with a receiver of these scattered signals providing processing to extract three dimensional track of these objects. Angle-of-Arrival (AOA) information of a received signal may be used, but is not required. Modifications of standard GPS signal processing allows observables such as range-sum, range-difference, and bistatic Doppler frequency to be observed. These observables, when coupled with standard bistatic/multistatic location equations, provide unambiguous and even redundant information on target coordinates. The method/device employs a modified code (range)/carrier(Doppler) search routine for initial target search/acquisition, wherein a direct path signal is used as a reference from which chip delay and Doppler shift excursions are examined. In this manner, the range and Doppler components observed will correspond to [range-sum−direct path] range, and true bistatic target Doppler irrespective of the satellite or receiver induced Doppler shifts.
摘要翻译：公开了一种用于使用GPS，GLONASS或其他现有RF信号的方法和装置。这些现有的RF信号被目标散射，这些散射信号的接收机提供处理以提取这些物体的三维轨道。可以使用接收信号的到达角度（AOA）信息，但不是必需的。标准GPS信号处理的修改允许观察范围和，范围差和双稳态多普勒频率等观测值。当与标准双基地/多位置方程相结合时，这些可观测量可以提供目标坐标上明确甚至冗余的信息。方法/装置采用用于初始目标搜索/获取的修改的码（范围）/载波（多普勒）搜索程序，其中使用直接路径信号作为检查码片延迟和多普勒频移漂移的参考。以这种方式，观察到的范围和多普勒分量将对应于[范围和 - 直接路径]范围和真正的双基准目标多普勒，而不管卫星或接收机引起的多普勒频移。

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