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|United States Patent||8,373,591|
|Margolin||February 12, 2013|
A system for sensing aircraft and other objects uses bistatic radar with spread-spectrum signals transmitted from remotely located sources such as aircraft flying at very high altitudes or from a satellite constellation. A bistatic spread spectrum radar system using a satellite constellation can be integrated with a communications system and/or with a system using long baseline radar interferometry to validate the digital terrain elevation database. The reliability and safety of TCAS and ADS-B are improved by using the signals transmitted from a TCAS or ADS-B unit as a radar transmitter with a receiver used to receive reflections. Aircraft and other objects using spread spectrum radar are detected by using two separate receiving systems. Cross-Correlation between the outputs of the two receiving systems reveals whether a noise signal is produced by the receiving systems themselves or is coming from the outside.
|Inventors:||Margolin; Jed (VC Highlands, NV)|
|Filed:||October 22, 2010|
|Application Number||Filing Date||Patent Number||Issue Date|
|Current U.S. Class:||342/146 ; 342/30; 342/453|
|Current International Class:||G01S 13/48 (20060101); G01S 13/93 (20060101)|
|Field of Search:||342/147|
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