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System and method for controlling intermodulation interference

  • US 7,983,635 B2
  • Filed: 07/20/2007
  • Issued: 07/19/2011
  • Est. Priority Date: 07/20/2007
  • Status: Expired due to Fees
First Claim
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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.

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