Systems and methods for TDOA/FDOA location
First Claim
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1. A method of processing electromagnetic radiation, comprising:
- receiving said electromagnetic radiation at a first position, said first position being located on a first sensing platform;
receiving said electromagnetic radiation at a second position and at a third position, said second and third positions being co-located in spaced relationship on a second sensing platform; and
at least one of;
measuring time difference of arrival (TDOA) information for said electromagnetic radiation between said first position and said second position, or measuring TDOA information for said electromagnetic radiation between said second position and said third position, or measuring TDOA information for said electromagnetic radiation between said first position and said third position, or a combination thereof.
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Abstract
Systems and methods that may be implemented to determine the location of an emitter of electromagnetic radiation, such as an RF signal emitter having an unknown location, using at least two electromagnetic radiation sensor antennas that are co-located on a single sensing platform in combination with at least one other electromagnetic radiation sensor antenna located on another sensing platform.
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Citations
26 Claims
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1. A method of processing electromagnetic radiation, comprising:
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receiving said electromagnetic radiation at a first position, said first position being located on a first sensing platform;
receiving said electromagnetic radiation at a second position and at a third position, said second and third positions being co-located in spaced relationship on a second sensing platform; and
at least one of;
measuring time difference of arrival (TDOA) information for said electromagnetic radiation between said first position and said second position, or measuring TDOA information for said electromagnetic radiation between said second position and said third position, or measuring TDOA information for said electromagnetic radiation between said first position and said third position, or a combination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for locating an emitter of a radio frequency (RF) signal, said method comprising:
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receiving said RF signal at a first sensor antenna, said first sensor antenna being located on a first sensing platform;
receiving said RF signal at a second sensor antenna and at a third sensor antenna, said second and third sensor antennas being co-located in spaced relationship on a second sensing platform;
measuring first time difference of arrival (TDOA) information for said RF signal between said first position and said second antenna sensors;
measuring frequency difference of arrival (FDOA) information for said RF signal between said first antenna sensor and at least one of said second and third antenna sensors;
measuring second TDOA information for said RF signal between said second antenna sensor and said third antenna sensor, or measuring third TDOA information for said RF signal between said first antenna sensor and said third antenna sensor, or a combination thereof; and
determining a location of said RF signal emitter based at least in part on an intersection of data determined from said first measured TDOA information with data determined from said measured FDOA information and with at least one of data determined from said second TDOA information, data determined from said third TDOA information, or a combination thereof. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An emitter location system, comprising:
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a first sensing platform configured to receive electromagnetic radiation at a first position on said first sensing platform, said first sensing platform comprising signal processing circuitry configured to process electromagnetic radiation received at said first position on said first sensing platform on a time and frequency basis;
a second sensing platform configured to receive electromagnetic radiation at a second position on said second sensing platform and at a third position on said second sensing platform, said second and third positions being co-located in spaced relationship on said second sensing platform, and said second sensing platform comprising signal processing circuitry configured to process electromagnetic radiation received at said first and second positions on said second sensing platform on a time and frequency basis; and
time difference of arrival (TDOA) processing circuitry configured to communicate with said signal processing circuitry of said first sensing platform and said signal processing circuitry of said second sensing platform. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A sensing system, comprising:
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a sensing platform configured to receive electromagnetic radiation at first and second positions on said sensing platform, said first and second positions being co-located in spaced relationship on said sensing platform; and
signal processing circuitry configured to process said electromagnetic radiation received at said first and second positions on a time basis, and further configured to communicate with time difference of arrival (TDOA) processing circuitry. - View Dependent Claims (23, 24)
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25. A method of processing electromagnetic radiation, comprising:
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receiving said electromagnetic radiation at a first position and at a second position, said first and second positions being co-located in spaced relationship on a first sensing platform; and
at least one of;
measuring time difference of arrival (TDOA) information for said electromagnetic radiation between said first position and said second position, or receiving said electromagnetic radiation at a third position, said third position being located on a second sensing platform, and measuring TDOA information for said electromagnetic radiation between said first position and said third position, or receiving said electromagnetic radiation at a third position, said third position being located on a second sensing platform, and measuring TDOA information for said electromagnetic radiation between said second position and said third position, or a combination thereof. - View Dependent Claims (26)
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Specification