MULTI-MODE, MULTI-STATIC INTERFEROMETER UTILIZING PSEUDO ORTHOGONAL CODES
First Claim
1. A system comprising:
- a transmitter array comprising at least a first transmitter and a second transmitter spatially separated from each other by a first known distance;
a receiver array comprising at least a first receiver and a second receiver spatially separated from each other by a second known distance, the receiver array being positioned to enable receipt of a return signal from transmissions provided by the transmitter array and reflecting off an object; and
a processor configured to enable the transmitter array to generate uniquely coded signals and configured to distinguish, based on the uniquely coded signals, a first signal transmitted by the first transmitter from a second signal transmitted by the second transmitter in response to reception of a combined signal including reflected signals corresponding to at least the first and second signals by the receiver array,wherein the processor is configured to process the reflected signals by;
determining a time-of-arrival (TOA) of each of the first signal and the second signal;
calculating a difference between the TOAs;
dividing the difference by a propagation speed of the first and second signals to obtain at least a first path length from the first transmitter to the first receiver and a second path length from the second transmitter to the second receiver;
determining at least one of (a) a range from the receiver array to a phase center of the transmitter array or (b) an angular position of the receiver array relative to the phase center of the transmitter array, based on at least the first and second path lengths or a phase difference of the first and second signals; and
determining at least one of (a) a range from the receiver array to an object or (b) an angular position of the object relative to the receiver array, based on one or more of the first and second path lengths, the range, the angular position, or the phase difference.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for providing a multi-mode, multi-static interferometer may include a transmitter array, a receiver array and a processor. The transmitter array includes at least a first transmitter and a second transmitter spatially separated from each other by a first known distance. The receiver array includes at least a first receiver and a second receiver spatially separated from each other by a second known distance. The receiver array is positioned to enable receipt of a return signal from transmissions provided by the transmitter array and reflecting off an object. The processor is configured to enable the transmitter array to generate uniquely coded signals and configured to distinguish, based on the uniquely coded signals, a first signal transmitted by the first transmitter from a second signal transmitted by the second transmitter in response to reception of a combined signal including reflected signals corresponding to at least the first and second signals by the receiver array.
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Citations
30 Claims
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1. A system comprising:
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a transmitter array comprising at least a first transmitter and a second transmitter spatially separated from each other by a first known distance; a receiver array comprising at least a first receiver and a second receiver spatially separated from each other by a second known distance, the receiver array being positioned to enable receipt of a return signal from transmissions provided by the transmitter array and reflecting off an object; and a processor configured to enable the transmitter array to generate uniquely coded signals and configured to distinguish, based on the uniquely coded signals, a first signal transmitted by the first transmitter from a second signal transmitted by the second transmitter in response to reception of a combined signal including reflected signals corresponding to at least the first and second signals by the receiver array, wherein the processor is configured to process the reflected signals by; determining a time-of-arrival (TOA) of each of the first signal and the second signal; calculating a difference between the TOAs; dividing the difference by a propagation speed of the first and second signals to obtain at least a first path length from the first transmitter to the first receiver and a second path length from the second transmitter to the second receiver; determining at least one of (a) a range from the receiver array to a phase center of the transmitter array or (b) an angular position of the receiver array relative to the phase center of the transmitter array, based on at least the first and second path lengths or a phase difference of the first and second signals; and determining at least one of (a) a range from the receiver array to an object or (b) an angular position of the object relative to the receiver array, based on one or more of the first and second path lengths, the range, the angular position, or the phase difference. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9)
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6. (canceled)
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10. A method comprising:
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providing for generation of signals from respective transmitters of a transmitter array comprising at least a first transmitter and a second transmitter spatially separated from each other by a first known distance, and the first transmitter and the second transmitter each generating uniquely coded signals that are distinguishable from each other; receiving return signals from transmissions provided by the transmitter array and reflecting off an object at a receiver array comprising at least a first receiver and a second receiver spatially separated from each other by a second known distance; distinguishing, based on the uniquely coded signals, a first signal transmitted by the first transmitter from a second signal transmitted by the second transmitter in response to reception of a combined signal including reflected signals corresponding to at least the first and second signals by the receiver array; and processing the reflected signals by; determining a time-of-arrival (TOA) of each of the first signal and the second signal; calculating a difference between the TOAs; dividing the difference by a propagation speed of the first and second signals to obtain at least a first path length from the first transmitter to the first receiver and a second path length from the second transmitter to the second receiver; determining at least one of (a) a range from the receiver array to a phase center of the transmitter array or (b) an angular position of the receiver array relative to the phase center of the transmitter array, based on at least the first and second path lengths or a phase difference of the first and second signals; and determining at least one of (a) a range from the receiver array to an object or (b) an angular position of the object relative to the receiver array, based on one or more of the first and second path lengths, the range, the angular position, or the phase difference. - View Dependent Claims (11, 12, 14, 15, 16)
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13. (canceled)
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17. A computer program product comprising at least one computer-readable storage medium having computer-executable program code instructions stored therein, the computer-executable program code instruction comprising:
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a first portion containing program code instructions for providing for generation of signals from respective transmitters of a transmitter array comprising at least a first transmitter and a second transmitter spatially separated from each other by a first known distance, and the first transmitter and the second transmitter each generating uniquely coded signals that are distinguishable from each other; a second portion containing program code instructions for receiving return signals from transmissions provided by the transmitter array and reflecting off an object at a receiver array comprising at least a first receiver and a second receiver spatially separated from each other by a second known distance; a third portion containing program code instructions for distinguishing, based on the uniquely coded signals, a first signal transmitted by the first transmitter from a second signal transmitted by the second transmitter in response to reception of a combined signal including reflected signals corresponding to at least the first and second signals by the receiver array; and a fourth portion containing program code instructions for processing the reflected signals by; determining a time-of-arrival (TOA) of each of the first signal and the second signal; calculating a difference between the TOAs; dividing the difference by a propagation speed of the first and second signals to obtain at least a first path length from the first transmitter to the first receiver and a second path length from the second transmitter to the second receiver; determining at least one of (a) a range from the receiver array to a phase center of the transmitter array or (b) an angular position of the receiver array relative to the phase center of the transmitter array, based on at least the first and second path lengths or a phase difference of the first and second signals; and determining at least one of (a) a range from the receiver array to an object or (b) an angular position of the object relative to the receiver array, based on one or more of the first and second path lengths, the range, the angular position, or the phase difference. - View Dependent Claims (18, 19, 21, 22, 23)
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20. (canceled)
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24. A system comprising:
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a transmitter array comprising at least a first transmitter and a second transmitter spatially separated from each other by a first known distance; a first receiver array comprising at least a first receiver and a second receiver spatially separated from each other by a second known distance, the receiver array being positioned to enable receipt of a return signal from transmissions provided by the transmitter array and reflecting off an object; a processor configured to enable the transmitter array to generate uniquely coded signals and configured to distinguish, based on the uniquely coded signals, a first signal transmitted by the first transmitter from a second signal transmitted by the second transmitter in response to reception of a combined signal including reflected signals corresponding to at least the first and second signals by the first receiver array; and a second receiver array comprising at least one receiver being positioned to enable receipt of the transmissions provided by the transmitter array, wherein the processor is configured to; determine a time-of-arrival (TOA) of each of the first signal and the second signal with respect to the first receiver array; determine an angular position of objects relative to the transmitter array and the first receiver array based on the TOA determined for each of the first signal and the second signal with respect to the first receiver array; enable a determination of a TOA of each of the first signal and the second signal with respect to the second receiver array; and enable a determination of an angular position of the second receiver array with respect to the transmitter and the first receiver array based on the TOA determined for each of the first signal and the second signal with respect to the second receiver array. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification