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Frequency-dependent filtering for wireless communications transmitters

  • US 8,190,114 B2
  • Filed: 07/17/2006
  • Issued: 05/29/2012
  • Est. Priority Date: 07/20/2005
  • Status: Active Grant
First Claim
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1. A method of transmitting information in a wireless communications system comprising:

  • a filter selectively applying in filtering to transmission of a carrier signal of a first band of frequencies of a wireless communications system based on a frequency separation distance between a frequency content of the carrier signal and a second band of frequencies allocated to a communications system other than the wireless communications system;

    wherein selectively applying filtering to transmission of a carrier signal comprises;

    providing the filtering when the frequency separation distance is greater than a predetermined threshold; and

    changing the filtering when the frequency separation distance is less than the predetermined threshold to reduce interference in the second band from the carrier signal; and

    wherein changing the filtering comprises changing at least one characteristic of the filter that provides the filtering.

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