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Channel calibration for a time division duplexed communication system

  • US 20050128953A1
  • Filed: 01/27/2005
  • Published: 06/16/2005
  • Est. Priority Date: 10/25/2002
  • Status: Active Grant
First Claim
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1. A method of calibrating communication links in a wireless time division duplexed (TDD) communication system, comprising:

  • obtaining a channel response estimate for a downlink channel from an access point to a user terminal;

    obtaining a channel response estimate for an uplink channel from the user terminal to the access point; and

    determining correction factors for the access point and correction factors for the user terminal based on the channel response estimates for the downlink and uplink channels, the correction factors for the access point and the correction factors for the user terminal being used to obtain a calibrated downlink channel response and a calibrated uplink channel response.

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