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Method for calibrating an electronically phase-controlled group antenna in radio communications systems

  • US 6,693,588 B1
  • Filed: 04/24/2002
  • Issued: 02/17/2004
  • Est. Priority Date: 10/26/1999
  • Status: Expired due to Term
First Claim
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1. A method for calibrating an electronically phase-controlled group antenna having n antenna elements in a radio communications system, comprising:

  • in the case of an antenna calibration in the upward direction, transmitting a reference signal from a shared reference antenna to each of the n antenna elements, the reference signal having a different transit time to the n antenna elements;

    in the case of an antenna calibration in the upward direction, passing a measuring signal from each of the n antenna elements to a device for error correction;

    in the case of an antenna calibration in the upward direction, ascertaining an error correction value for each of the n antenna elements in relation to a reference point, the error correction values being determined at the device for error correction based on corresponding measuring signals;

    in the case of an antenna calibration in the downward direction, transmitting a reference signal from each of the n antenna elements to the reference antenna, such that each antenna element has an assigned reference signal and the n antenna elements form n reference signals at the same time;

    in the case of an antenna calibration in the downward direction, receiving the reference signals in superposed form at the reference antenna, each of the reference signals having a different transit time;

    in the case of an antenna calibration in the downward direction, passing a shared measuring signal from the reference antenna to the device for error correction, the shared measuring signal carrying information regarding the transit time of each of the reference signals; and

    in the case of an antenna calibration in the downward direction, ascertaining from the shared measuring signal an error correction value for each of the n antenna elements in relation to the reference point.

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