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|United States Patent||8,643,534|
|Margolin||February 4, 2014|
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:||August 25, 2012|
|Document Identifier||Publication Date|
|US 20130176163 A1||Jul 11, 2013|
|Application Number||Filing Date||Patent Number||Issue Date|
|12910779||Oct 22, 2010||8373591|
|61256765||Oct 30, 2009|
|Current U.S. Class:||342/30 ; 342/146|
|Current International Class:||G01S 13/93 (20060101); G01S 13/75 (20060101)|
|Field of Search:||;342/27-40|
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