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US 5,614,912 AGranted
Radar processing method and apparatus
AssigneeThe MITRE Corporation
InventorEdmund J. Mitchell
Life of this patent
Estimating the term…
Abstract
Radar processing method and apparatus in which the receiver need not accept the transmitted signal directly in order to determine the timing information required to locate targets. Processing apparatus according to the invention employs signals transponded or reflected from at least two targets to compute target and/or transmitter locations, or to simulate the transmitted signal for input to a conventional bistatic processor.
Claims26
Apparatus for locating at least two targets comprising:
- a transmitter of electromagnetic radiation for directing electromagnetic radiation to said at least two targets,
- a receiver of electromagnetic radiation for intercepting reflected electromagnetic radiation or transponded electromagnetic radiation from said at least two targets, said receiver not receiving electromagnetic radiation directly from said transmitter for subsequent processing,
- a processor operationally engaged to said receiver and independent of said transmitter for accepting signals from said receiver, said signals characterizing said reflected electromagnetic radiation or said transponded electromagnetic radiation from said at least two targets, and
- programs running in said processor for computing said locations of any of said at least two targets from said signals even though said receiver has not been manipulated to be synchronized with said transmitter.
1 more element
Apparatus for locating at least two targets comprising:
- at least two transmitter of electromagnetic radiation for directing electromagnetic radiation to said at least two targets,
- a receiver of electromagnetic radiation for intercepting reflected electromagnetic radiation or transponded electromagnetic radiation from said at least two targets, said receiver not receiving electromagnetic radiation directly from said transmitter for subsequent processing,
- a processor operationally engaged to said receiver and independent of said transmitter for accepting signals from said receiver, said signals characterizing said reflected electromagnetic radiation or said transponded electromagnetic radiation only from said at least two targets, and
- programs running in said processor for computing said locations of any of said at least two targets from said signals, even though said receiver has not been manipulated to be synchronized with said transmitter.
1 more element
Apparatus for locating at least two targets comprising:
- a transmitter of electromagnetic radiation for directing electromagnetic radiation in the form of pulses at a pulse repetition interval and a phase to said at least two targets,
- a receiver of electromagnetic radiation for intercepting reflected electromagnetic radiation or transponded electromagnetic radiation from said at least two targets, said receiver not receiving electromagnetic radiation directly from said transmitter for subsequent processing,
- a processor operationally engaged to said receiver and independent of said transmitter for accepting signals from said receiver, said signals characterizing said reflected electromagnetic radiation or said transponded electromagnetic radiation only from said at least two targets, and
- programs running in said processor for computing the pulse repetition interval and phase of the transmitted radiation, and for producing a signal simulating the transmitter pulses, and
- a bistatic processor for accepting signals characterizing said reflected electromagnetic radiation or said transponded electromagnetic radiation from said at least two targets and said signal simulating said transmitter pulses, and for computing said locations of any of said at least two targets, even though said receiver has not been manipulated to be synchronized with said transmitter.
2 more elements
Apparatus for locating a transmitter which is directing electromagnetic radiation to at least two targets, comprising:
- a receiver of electromagnetic radiation for intercepting reflected electromagnetic radiation or transponded electromagnetic radiation from said at least two targets, said receiver not receiving electromagnetic radiation directly from said transmitter for subsequent processing,
- a processor operationally engaged to said receiver and independent of said transmitter for accepting signals from said receiver, said signals characterizing the reflected electromagnetic radiation or transponded electromagnetic radiation from said at least two targets, and
- programs running in said processor for computing said location of said transmitter from said signals, even though said receiver has not been manipulated to be synchronized with said transmitter.
Method for generating the location of at least two targets comprising the steps of:
- providing a receiver characterized by an ability to receive electromagnetic radiation reflected and transponded from a target when said target is illuminated by a transmitter,
- allowing the receiver to receive electromagnetic radiation from said at least two targets illuminated by transmitted electromagnetic radiation from said transmitter under conditions where the receiver does not receive electromagnetic radiation directly from the transmitter and the receiver is not manipulated to be synchronized with the transmitter, and
- computing said locations of said at least two targets from said received electromagnetic radiation without receiving additional information directly from said transmitter.
Method for generating the locations at least two targets comprising the steps of:
- providing a receiver characterized by an ability to receive electromagnetic radiation in the form of pulses at a pulse repetition interval and phase reflected and transponded from a target when said target is illuminated by a transmitter,
- allowing the receiver to receive said electromagnetic radiation from said at least two targets illuminated by transmitted electromagnetic radiation from said transmitter under conditions where the receiver does not receive electromagnetic radiation directly from the transmitter and the receiver is not manipulated to be synchronized with the transmitter,
- computing the pulse repetition interval and phase of the transmitted radiation from signals derived only from said received electromagnetic radiation,
- producing a signal simulating said transmitted electromagnetic radiation, and
- performing bistatic processing on said received electromagnetic radiation and said signal simulating said transmitted pulses to compute said locations of said at least two targets, said performing of bistatic processing without receiving additional information directly from said transmitter.
2 more elements
Method for generating a location of a transmitter comprising the steps of:
- providing a receiver characterized by an ability to receive electromagnetic radiation in the form of pulses at a pulse repetition interval and phase reflected and transponded from a target when said target is illuminated by a transmitter,
- allowing the receiver to receive electromagnetic radiation from said at least two targets illuminated by transmitted electromagnetic radiation from said transmitter under conditions where the receiver does not receive electromagnetic radiation directly from the transmitter and the receiver is not manipulated to be synchronized with the transmitter, and
- computing said locations of any of said transmitter from said received electromagnetic radiation without receiving additional information directly from said transmitter.
Apparatus for locating targets, the apparatus comprising:
- a receiver that only electromagnetic radiation signals reflected or transponded from targets that have been illuminated by a transmitter;
- and
- a computer that is operationally engaged with the receiver and independent of the transmitter, the computer running a program that extracts timing information from the received signals, whereby, when the receiver receives radiation from at least two targets, the program calculates the positions of those targets even though the receiver has not been manipulated to be synchronized with the transmitter.
Dependencies are inferred from the claim text.