Adaptive beam pattern antennas system and method for interference mitigation in point to multipoint RF data transmissions
DC CAFCFirst Claim
1. A method for mitigating the effects of interference in an RF band data transmission system wherein transmitter and receiver are in fixed relationship to each other, said method comprising the steps of:
- discerning a relative transmission rate to and from at least one subscriber of said data transmissions;
locating any interference with transmission to and from said subscriber;
ascertaining a type of said interference;
determining if said interference is periodic; and
generating a data transmission antenna pattern with a null in the direction of said interference during said interference.
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Accused Products
Abstract
A system for mitigating the effects of interference in an unlicensed RF band for point to point data transmissions comprises a multibeam antenna locating interference with transmission to and from data transmission subscribers. A scanner determines the frequency, bandwidth and any periodicity of the interference. Separate scanners can be used for each antenna beam. Nulls are generated in the data transmission antenna pattern in the direction of the interference during periods of interference. Communications with subscribers in a direction of the interference is carried out using a different channel or is scheduled around the interference occurrences. Alternatively, such subscribers are directed to establish data transmissions with an alternate hub antenna.
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Citations
22 Claims
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1. A method for mitigating the effects of interference in an RF band data transmission system wherein transmitter and receiver are in fixed relationship to each other, said method comprising the steps of:
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discerning a relative transmission rate to and from at least one subscriber of said data transmissions;
locating any interference with transmission to and from said subscriber;
ascertaining a type of said interference;
determining if said interference is periodic; and
generating a data transmission antenna pattern with a null in the direction of said interference during said interference. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for mitigating effects of interference for fixed transmitter and receiver unlicensed RF band data transmissions, said system comprising:
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means for locating at least a direction of a source of any interference with transmission to and from at least one receiver of said data transmissions;
means for scanning said interference to determine, a frequency and bandwidth of said interference;
means for determining any periodicity of said interference; and
means for generating a data transmission antenna pattern with a null toward said interference during said interference. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system for mitigating the effects of interference in an unlicensed RF band for point to multipoint data transmissions, said system comprising:
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at least one multibeam antenna locating interference with transmission to and from at least one subscriber of said data transmissions; and
at least one scanner determining, a frequency, bandwidth and any periodicity of said interference;
wherein a data transmission antenna pattern with a null in the direction of said interference is generated during a period of said interference. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification