Digital beamforming interferometry
First Claim
1. A method comprising:
- generating, by a processor of a computing device, a first signal, a second signal, a third signal, and a fourth signal, wherein each of the first signal, the second signal, the third signal, and the fourth signal have a frequency, a phase, and an amplitude;
transmitting, by the processor, from a first sub-array of a plurality of sub-arrays of an antenna, the first signal;
transmitting, by the processor, from a second sub-array of the antenna, the second signal, wherein a first signal amplitude, a first signal frequency, a first signal phase, a second signal amplitude, a second signal frequency, and a second signal phase are configured such that when the first signal and the second signal are transmitted simultaneously the first signal and the second signal constructively interact to form a first beam signal, and further wherein the first beam signal is configured to have a first look angle;
transmitting, by the processor, from a third sub-array of the antenna, the third signal;
transmitting, by the processor, from a fourth sub-array of the antenna, the fourth signal, wherein a third signal amplitude, a third signal frequency, a third signal phase, a fourth signal amplitude, a fourth signal frequency, and a fourth signal phase are configured such that when the third signal and the fourth signal are transmitted simultaneously the third signal and the fourth signal constructively interact to form a second beam signal, and further wherein the second beam signal is configured to have a second look angle;
receiving a first reflected signal by at least one sub-array of the plurality of sub-arrays of the antenna, wherein the first reflected signal comprises a reflected portion of the first beam signal, and wherein the reflected portion of the first beam signal has been reflected off of a first region within the first look angle;
receiving a second reflected signal by at least one sub-array of the plurality of sub-arrays of the antenna, wherein the second reflected signal comprises a reflected portion of the second beam signal, and wherein the reflected portion of the second beam signal has been reflected off of a second region within the second look angle; and
generating, by the processor, an interferogram utilizing information in the first reflected signal and the second reflected signal.
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Accused Products
Abstract
A method according to an illustrative embodiment includes generating first, second, third, and fourth signals. The method also includes transmitting from an antenna, the first signal, and transmitting the antenna, the second signal. The first and second signals are configured such that when the signals are transmitted simultaneously the signals constructively interact to form a first beam signal. The first beam signal has a first look angle. The method also includes transmitting from the antenna the third signal and from the antenna the fourth signal. The third and fourth signals are configured such that when the signals are transmitted simultaneously the signals constructively interact to form a second beam signal. The second beam signal has a second look angle. The method also includes receiving a first and second reflected signals and generating an interferogram utilizing information in the first and second reflected signals.
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Citations
20 Claims
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1. A method comprising:
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generating, by a processor of a computing device, a first signal, a second signal, a third signal, and a fourth signal, wherein each of the first signal, the second signal, the third signal, and the fourth signal have a frequency, a phase, and an amplitude; transmitting, by the processor, from a first sub-array of a plurality of sub-arrays of an antenna, the first signal; transmitting, by the processor, from a second sub-array of the antenna, the second signal, wherein a first signal amplitude, a first signal frequency, a first signal phase, a second signal amplitude, a second signal frequency, and a second signal phase are configured such that when the first signal and the second signal are transmitted simultaneously the first signal and the second signal constructively interact to form a first beam signal, and further wherein the first beam signal is configured to have a first look angle; transmitting, by the processor, from a third sub-array of the antenna, the third signal; transmitting, by the processor, from a fourth sub-array of the antenna, the fourth signal, wherein a third signal amplitude, a third signal frequency, a third signal phase, a fourth signal amplitude, a fourth signal frequency, and a fourth signal phase are configured such that when the third signal and the fourth signal are transmitted simultaneously the third signal and the fourth signal constructively interact to form a second beam signal, and further wherein the second beam signal is configured to have a second look angle; receiving a first reflected signal by at least one sub-array of the plurality of sub-arrays of the antenna, wherein the first reflected signal comprises a reflected portion of the first beam signal, and wherein the reflected portion of the first beam signal has been reflected off of a first region within the first look angle; receiving a second reflected signal by at least one sub-array of the plurality of sub-arrays of the antenna, wherein the second reflected signal comprises a reflected portion of the second beam signal, and wherein the reflected portion of the second beam signal has been reflected off of a second region within the second look angle; and generating, by the processor, an interferogram utilizing information in the first reflected signal and the second reflected signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus comprising:
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a memory; a processor coupled to the memory; and a set of instructions stored on the memory and configured to be executed by a processor, wherein the processor is configured to; generate a first signal, a second signal, a third signal, and a fourth signal, wherein each of the first signal, the second signal, the third signal, and the fourth signal have a frequency, a phase, and an amplitude; transmit, from a first sub-array of a plurality of sub-arrays of an antenna, the first signal; transmit, from a second sub-array of the antenna, the second signal, wherein a first signal amplitude, a first signal frequency, a first signal phase, a second signal amplitude, a second signal frequency, and a second signal phase are configured such that when the first signal and the second signal are transmitted simultaneously the first signal and the second signal constructively interact to form a first beam signal, and further wherein the first beam signal is configured to have a first look angle; transmit, from a third sub-array of the antenna, the third signal; transmit, from a fourth sub-array of the antenna, the fourth signal, wherein a third signal amplitude, a third signal frequency, a third signal phase, a fourth signal amplitude, a fourth signal frequency, and a fourth signal phase are configured such that when the third signal and the fourth signal are transmitted simultaneously the third signal and the fourth signal constructively interact to form a second beam signal, and further wherein the second beam signal is configured to have a second look angle; receive a first reflected signal by at least one sub-array of the plurality of sub-arrays of the antenna, wherein the first reflected signal comprises a reflected portion of the first beam signal, and wherein the reflected portion of the first beam signal has been reflected off of a first region within the first look angle; receive a second reflected signal by at least one sub-array of the plurality of sub-arrays of the antenna, wherein the second reflected signal comprises a reflected portion of the second beam signal, and wherein the reflected portion of the second beam signal has been reflected off of a second region within the second look angle; and generate an interferogram utilizing information in the first reflected signal and the second reflected signal.
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20. A non-transitory computer readable medium having instructions stored thereon that, upon execution by a computing device, cause the computing device to perform the operations comprising:
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generating a first signal, a second signal, a third signal, and a fourth signal, wherein each of the first signal, the second signal, the third signal, and the fourth signal have a frequency, a phase, and an amplitude; transmitting, from a first sub-array of a plurality of sub-arrays of an antenna, the first signal; transmitting, from a second sub-array of the antenna, the second signal, wherein a first signal amplitude, a first signal frequency, a first signal phase, a second signal amplitude, a second signal frequency, and a second signal phase are configured such that when the first signal and the second signal are transmitted simultaneously the first signal and the second signal constructively interact to form a first beam signal, and further wherein the first beam signal is configured to have a first look angle; transmitting, from a third sub-array of the antenna, the third signal; transmitting, from a fourth sub-array of the antenna, the fourth signal, wherein a third signal amplitude, a third signal frequency, a third signal phase, a fourth signal amplitude, a fourth signal frequency, and a fourth signal phase are configured such that when the third signal and the fourth signal are transmitted simultaneously the third signal and the fourth signal constructively interact to form a second beam signal, and further wherein the second beam signal is configured to have a second look angle; receiving a first reflected signal by at least one sub-array of the plurality of sub-arrays of the antenna, wherein the first reflected signal comprises a reflected portion of the first beam signal, and wherein the reflected portion of the first beam signal has been reflected off of a first region within the first look angle; receiving a second reflected signal by at least one sub-array of the plurality of sub-arrays of the antenna, wherein the second reflected signal comprises a reflected portion of the second beam signal, and wherein the reflected portion of the second beam signal has been reflected off of a second region within the second look angle; and generating an interferogram utilizing information in the first reflected signal and the second reflected signal.
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Specification