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Cross-channel interference

  • US 6,526,260 B1
  • Filed: 06/22/2000
  • Issued: 02/25/2003
  • Est. Priority Date: 06/24/1999
  • Status: Expired due to Fees
First Claim
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1. In a multi-channel electrical communication system, a method of estimating the interference level in a test channel due to the intermodulation of two or more other channels, where each channel is centered upon a carrier frequency, the method comprising, for a given m-th order mode, the steps of:

  • identifying at least one set of carrier frequencies, the m-th order linear combination of which gives rise substantially to the carrier frequency of said test channel; and

    for the at least one identified set of carrier frequencies, tuning signal generators to respective ones of the carrier frequencies, applying the generated signals to an input of the communication system, and measuring at an output of the system the intermodulation interference at the carrier frequency of the test channel.

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