Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns

摘要

A method for detecting an object, comprising the steps of defining expected characteristics of scattered electromagnetic radiation to be received at a receiver; attenuating at least a portion of electromagnetic radiation received at the receiver by a presence of an object within a path of electromagnetic information; and detecting the attenuation to indicate a presence of the object. The object may be a low radar profile object, such as a stealth aircraft. The electromagnetic radiation is preferably microwave, but may also be radio frequency or infrared. By using triangulation and other geometric techniques, distance and position of the object may be computed.

主权项

1. A method for processing a signal, comprising:
transmitting modulated radio frequency electromagnetic radiation propagating along at least one off axis path with respect to a receiver toward a scattering medium; scattering the modulated radio frequency electromagnetic radiation with the scattering medium; receiving the scattered modulated radio frequency electromagnetic radiation at the receiver, wherein the receiver has a plurality of receiving antennas, each receiving a respective distinct scattered modulated radio frequency electromagnetic radiation signal; determining a respective time delay associated with the received scattered modulated radio frequency electromagnetic radiation signals with at least one correlator; and determining expected characteristics of the respective scattered modulated radio frequency electromagnetic radiation signals at the receiver.