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Adjacent channel interference cancellation in multi-channel systems

  • US 10,044,490 B2
  • Filed: 11/14/2014
  • Issued: 08/07/2018
  • Est. Priority Date: 11/14/2013
  • Status: Active Grant
First Claim
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1. A method for a base station to perform adjacent channel interference cancellation with multiple co-located transmit channels and multiple co-located receive channels, comprising:

  • determining, at a cloud coordination server, that a first transmit channel transceiver of the base station is scheduled to transmit when a second transmit channel transceiver of the base station is scheduled to receive, and initiating sending an interference cancellation procedure message based on said determination;

    collecting, at the base station, a first channel usage sample at a first transmit time and at the first transmit channel transceiver using a first transmit channel;

    collecting, at the base station, a second channel usage sample at the first transmit time and at the second transmit channel transceiver colocated with the first transmit channel transceiver-and using a second transmit channel;

    sending the first channel usage sample and the second usage sample to the cloud coordination server for analysis using a low-latency connection;

    assigning, by the cloud coordination server, coefficient weights in an adjacent channel interference model for each of the first and the second transmit channel based on the first and the second channel usage samples;

    determining, at the base station, whether a radio is available for measuring current adjacent channel usage;

    dynamically adjusting, by the cloud coordination server, coefficient weights for the first transmit channel based on the current adjacent channel usage; and

    adding, at the base station, a correction signal canceling noise in a second receive channel at a second time based on the coefficient weights for the first transmit channel,wherein the second transmit channel is adjacent to the first transmit channel, such that the second transmit channel shares an upper or a lower frequency boundary with a frequency band of the first transmit channel.

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