Self-healing antenna arrays
First Claim
1. A method for controlling a radiation pattern generated by an antenna, the method comprising:
- using a computer system having a processor to perform the steps of;
identifying a current radiation pattern for the antenna using initial coefficients for a modulation function for the antenna;
(a) applying a first constraint to the current radiation pattern to form a modified radiation pattern;
(b) identifying new coefficients for the modulation function as trial coefficients for which a difference between a radiation pattern for the antenna generated using the coefficients trial and the modified radiation pattern is reduced;
(c) applying a third constraint to the new coefficients such that the new coefficients have a selected number of coefficients equal to a number of elements in an array of elements in the antenna;
(d) substantially removing a contribution to the modified radiation pattern of a set of elements in the array of elements that are operating outside of selected parameters by applying a second constraint to a set of coefficients in the new coefficients that correspond to the set of elements to form modified coefficients for the modulation function;
iterating through the steps of (a), (b), (c), and (d) until a new radiation pattern based on the modified coefficients for the modulation function meets the first constraint; and
in response to the new radiation pattern meeting the first constraint, operating the antenna using the modulation function with the modified coefficients such that a performance of the antenna is within selected tolerances.
1 Assignment
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Accused Products
Abstract
A method and apparatus for managing an antenna. A current radiation pattern is identified for the antenna using initial coefficients for a modulation function for the antenna. A first constraint is applied to the current radiation pattern to form a modified radiation pattern. New coefficients for the modulation function are identified as coefficients for which a difference between a radiation pattern for the antenna generated using the coefficients and the modified radiation pattern is reduced. A second constraint is applied to a set of coefficients in the new coefficients to form modified coefficients for the modulation function. The steps of applying the first constraint, identifying the new coefficients for the modulation function, and applying the second constraint are iterated until a new radiation pattern based on the modified coefficients for the modulation function meets the first constraint.
13 Citations
19 Claims
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1. A method for controlling a radiation pattern generated by an antenna, the method comprising:
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using a computer system having a processor to perform the steps of; identifying a current radiation pattern for the antenna using initial coefficients for a modulation function for the antenna; (a) applying a first constraint to the current radiation pattern to form a modified radiation pattern; (b) identifying new coefficients for the modulation function as trial coefficients for which a difference between a radiation pattern for the antenna generated using the coefficients trial and the modified radiation pattern is reduced; (c) applying a third constraint to the new coefficients such that the new coefficients have a selected number of coefficients equal to a number of elements in an array of elements in the antenna; (d) substantially removing a contribution to the modified radiation pattern of a set of elements in the array of elements that are operating outside of selected parameters by applying a second constraint to a set of coefficients in the new coefficients that correspond to the set of elements to form modified coefficients for the modulation function; iterating through the steps of (a), (b), (c), and (d) until a new radiation pattern based on the modified coefficients for the modulation function meets the first constraint; and in response to the new radiation pattern meeting the first constraint, operating the antenna using the modulation function with the modified coefficients such that a performance of the antenna is within selected tolerances. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 18)
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10. An apparatus for controlling a radiation pattern generated by an antenna, the apparatus comprising:
an antenna manager configured to; identify a current radiation pattern for the antenna using initial coefficients for a modulation function for the antenna; (a) apply a first constraint to the current radiation pattern to form a modified radiation pattern; (b) identify new coefficients for the modulation function as trial coefficients for which a difference between a radiation pattern for the antenna generated using the coefficients trial and the modified radiation pattern is reduced; (c) apply a third constraint to the new coefficients such that the new coefficients have a selected number of coefficients equal to a number of elements in an array of elements in the antenna; (d) substantially removing a contribution to the modified radiation pattern of a set of elements in the array of elements that are operating outside of selected parameters by applying a second constraint to a set of coefficients in the new coefficients that correspond to the set of elements to form modified coefficients for the modulation function; and iterate through the steps of (a), (b), (c), and (d) until a new radiation pattern based on the modified coefficients for the modulation function meets the first constraint, and in response to the new radiation pattern meeting the first constraint, operating the antenna using the modulation function with the modified coefficients such that the performance of the antenna is within selected tolerances. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A computer system for controlling a radiation pattern generated by an antenna comprising:
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a bus system; a storage device connected to the bus system, wherein the storage device is configured to store program code; and a processor unit, wherein the processor unit is configured to run the program code to; identify a current radiation pattern for the antenna using initial coefficients for a modulation function for the antenna; (a) apply a first constraint to the current radiation pattern to form a modified radiation pattern; (b) identify new coefficients for the modulation function as trial coefficients for which a difference between a radiation pattern for the antenna generated using the coefficients trial and the modified radiation pattern is reduced; (c) applying a third constraint to the new coefficients such that the new coefficients have a selected number of coefficients equal to a number of elements in an array of elements in the antenna; (d) substantially remove a contribution to the modified radiation pattern of a set of elements in the array of elements that are operating outside of selected parameters by applying a second constraint to a set of coefficients in the new coefficients that correspond to the set of elements to form modified coefficients for the modulation function; and iterate through the steps of (a), (b), (c), and (d) until a new radiation pattern based on the modified coefficients for the modulation function meets the first constraint, and in response to the new radiation pattern meeting the first constraint, operating the antenna using the modulation function with the modified coefficients such that the performance of the antenna is within selected tolerances. - View Dependent Claims (19)
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Specification