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Channel calibration for a time division duplexed communication system

  • US 8,570,988 B2
  • Filed: 01/27/2005
  • Issued: 10/29/2013
  • 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:

  • deriving, by a first station, a channel response estimate for a downlink channel from a second station to the first station;

    receiving, from the second station, a channel response estimate for an uplink channel from the first station to the second station; and

    determining correction factors for the second station and correction factors for the first station based on the channel response estimates for the downlink and uplink channels, the correction factors for the second station and the correction factors for the first station being used to obtain a calibrated downlink channel response and a calibrated uplink channel response.

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