System and method for controlling intermodulation interference
First Claim
1. A method of controlling intermodulation (IM) interference, the method comprising:
- determining when transmissions from at least two transmitters are to overlap in time, each of the at least two transmitters assigned a separate transmit frequency; and
when transmissions from the two transmitters are to overlap in time;
determining if an IM product spectrum, produced by the at least two transmitters, overlaps the spectrum of an assigned receive frequency;
if the IM product spectrum overlaps the assigned receive frequency spectrum, determining if a signal is being propagated on the assigned receive frequency;
if the signal is not being propagated on the assigned receive frequency, allowing the at least two transmitters to transmit the transmissions that overlap in time; and
if the signal is being propagated on the assigned receive frequency, initiating control steps to reduce the effects of IM interference.
1 Assignment
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Accused Products
Abstract
In one embodiment, a method of controlling intermodulation (IM) interference is provided. The method comprises determining if an IM product spectrum overlaps the spectrum of an assigned receive frequency and determining when transmissions from at least two transmitters are to overlap in time. If the IM product spectrum overlaps the assigned receive frequency spectrum, it is determined if a signal is being propagated on the receive frequency when the transmissions from the at least two transmitters are to overlap in time. If a signal is not being propagated on the receive frequency, the at least two transmitters are allowed to transmit the overlapping transmissions; and if a signal is being propagated on the receive frequency, control steps are initiated to reduce the effects of IM interference.
17 Citations
17 Claims
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1. A method of controlling intermodulation (IM) interference, the method comprising:
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determining when transmissions from at least two transmitters are to overlap in time, each of the at least two transmitters assigned a separate transmit frequency; and when transmissions from the two transmitters are to overlap in time; determining if an IM product spectrum, produced by the at least two transmitters, overlaps the spectrum of an assigned receive frequency; if the IM product spectrum overlaps the assigned receive frequency spectrum, determining if a signal is being propagated on the assigned receive frequency; if the signal is not being propagated on the assigned receive frequency, allowing the at least two transmitters to transmit the transmissions that overlap in time; and if the signal is being propagated on the assigned receive frequency, initiating control steps to reduce the effects of IM interference. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A multi-carrier radio comprising:
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a plurality of transceivers, each transceiver assigned a transmit frequency and a receive frequency; and a processing unit configured to flag each assigned receive frequency for which the processing unit determines that an intermodulation (IM) product spectrum generated by at least two of the plurality of transceivers overlaps a respective assigned receive frequency spectrum; wherein the processing unit is configured to check for a signal on each flagged assigned receive frequency when the processing unit determines that the at least two transceivers are to overlap transmissions, the processing unit further configured to initiate control steps to reduce the effects of IM interference when a signal is detected on a flagged assigned receive frequency and to allow the at least two transceivers to overlap transmissions if no signal is detected on a flagged assigned receive frequency. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A program product comprising program instructions embodied on a processor-readable medium for execution by a programmable processor, wherein the program instructions are operable to cause the programmable processor to:
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determine when transmissions from at least two transmitters are to overlap in time, each transmitter assigned a separate frequency; determine a spectrum of an intermodulation (IM) product generated by the at least two transmitters; determine if the IM product spectrum overlaps a spectrum of an assigned receive frequency; if the IM product spectrum overlaps the assigned receive frequency spectrum, determine if a signal is being propagated on an assigned receive frequency when transmissions from the at least two transmitters are to overlap in time; allow the transmissions from the at least two transmitters to overlap if a signal is not being propagated on the assigned receive frequency; and initiate control steps to reduce the effects of IM interference if a signal is being propagated on the assigned receive frequency when transmissions from the at least two transmitters are to overlap in time and the IM product spectrum overlaps the assigned receive frequency spectrum. - View Dependent Claims (14, 15, 16, 17)
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Specification