Coded aperture scanning
First Claim
Patent Images
1. A method comprising:
- splitting a signal into multiple portions corresponding to elements of an array;
coding and phase adjusting the multiple portions of the signal to form phase adjusted, coded portions of the signal by coding each portion of the multiple portions with a different code and by applying phase adjustments associated with the corresponding elements of the array to the portions;
transmitting the phase adjusted, coded portions of the signal via the corresponding elements of the array;
receiving radiant energy at an element at a receiver side of the array, wherein the radiant energy corresponds to the phase adjusted, coded portions of the signal;
decoding the coded portions of the signal to form decoded signal portions;
adding the decoded signal portions to form a received signal;
digitizing the radiant energy to form a digitized radiofrequency environment;
generating multiple copies of the digitized radiofrequency environment; and
applying a different phase adjustment function to each copy of the digitized radio frequency environment to generate multiple complete received signals, wherein each of the multiple complete received signals is associated with a different direction.
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Abstract
A particular method includes splitting a signal into multiple portions corresponding to elements of an array. The method also includes coding and phase adjusting the multiple portions of the signal to form phase adjusted, coded portions of the signal by coding each portion of the multiple portions with a different code and by applying phase adjustments associated with the corresponding elements of the array to the portions. The method also includes transmitting the phase adjusted, coded portions of the signal via the corresponding elements of the array.
76 Citations
19 Claims
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1. A method comprising:
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splitting a signal into multiple portions corresponding to elements of an array; coding and phase adjusting the multiple portions of the signal to form phase adjusted, coded portions of the signal by coding each portion of the multiple portions with a different code and by applying phase adjustments associated with the corresponding elements of the array to the portions; transmitting the phase adjusted, coded portions of the signal via the corresponding elements of the array; receiving radiant energy at an element at a receiver side of the array, wherein the radiant energy corresponds to the phase adjusted, coded portions of the signal; decoding the coded portions of the signal to form decoded signal portions; adding the decoded signal portions to form a received signal; digitizing the radiant energy to form a digitized radiofrequency environment; generating multiple copies of the digitized radiofrequency environment; and applying a different phase adjustment function to each copy of the digitized radio frequency environment to generate multiple complete received signals, wherein each of the multiple complete received signals is associated with a different direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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splitting a signal into multiple lower power signals; coding and phase adjusting the lower power signals to form phase adjusted, coded portions of the signal by coding each of the lower power signals with a different code and by applying phase adjustments associated with corresponding elements of an antenna array; transmitting the phase adjusted, coded portions of the signal via the corresponding elements; receiving radiant energy at an element at a receiver side of the antenna array, wherein the radiant energy corresponds to the phase adjusted, coded portions of the signal; decoding the coded portions of the signal to form decoded signal portions; and adding the decoded signal portions to form a received signal; digitizing the radiant energy to form a digitized radiofrequency environment; generating multiple copies of the digitized radiofrequency environment; and applying a different phase adjustment function to each copy of the digitized radiofrequency environment to generate multiple complete received signals, wherein each of the multiple complete received signals is associated with a different direction. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An array comprising:
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multiple antenna elements; a feed system to receive a signal and to split the signal into multiple lower power signals; multiple correlators coupled to the feed system and to the multiple antenna elements, the multiple correlators adapted to code and phase adjust the lower power signals to form phase adjusted, coded portions of the signal by coding each of the multiple lower power signals with a different code and by applying to each of the multiple lower power signals a phase adjustment associated with a corresponding array element of the multiple antenna elements; at least one element coupled to a receiver to receive radiant energy as received signals corresponding to the phase adjusted, coded portions of a signal transmitted by the multiple antenna elements; and the receiver adapted to decode the received signals and to add decoded received signals to form a complete received signal, wherein the receiver digitizes the received radiant energy to form a digitized radiofrequency environment and generates multiple copies of the digitized radiofrequency environment, and wherein the receiver applies a different phase adjustment function to each copy of the digitized radiofrequency environment to generate multiple complete received signals, wherein each of the multiple complete received signals is associated with a different direction. - View Dependent Claims (18, 19)
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Specification