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Automatic array calibration scheme for wireless point-to-multipoint communication networks

  • US 6,346,910 B1
  • Filed: 04/07/2000
  • Issued: 02/12/2002
  • Est. Priority Date: 04/07/1999
  • Status: Expired due to Fees
First Claim
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1. An antenna array calibration apparatus comprising:

  • a calibration signal generating unit which generates a calibration signal from a coherent source;

    a calibration signal injecting unit which is operable to selectively inject said calibration signal as an input signal;

    a receiver unit which receives said input signal and obtains a channel signal from said input signal;

    a reception data channel unit which receives said channel signal and generates a first set of I/Q signals; and

    a controller which controls said calibration signal injecting unit to selectively insert said calibration signal as said input signal, and receives said first set of I/Q signals from said reception data channel unit, wherein said controller calculates a reception data channel offset based on said first set of I/Q signals.

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