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Method and measurement configuration for measuring the characteristics of radio channels

  • US 6,311,043 B1
  • Filed: 06/05/2000
  • Issued: 10/30/2001
  • Est. Priority Date: 10/27/1998
  • Status: Expired due to Fees
First Claim
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1. A method for measuring characteristics of radio channels, which comprises:

  • transmitting a transmission signal containing a preselected test sequence;

    receiving received signals with a plurality of receiving sensors in a two-dimensional antenna array, the respective received signals being composed of wave elements of the transmission signal with regard to an azimuth φ

    k and an elevation θ

    k of different incidence direction and different delay;

    demodulating and subsequently sampling the received signals;

    calculating eigenvalues corresponding to dominant eigenvalues with samples obtained in the sampling step, and deriving a signal subspace matrix from the calculated eigen vectors;

    establishing invariance equations dependent on the signal subspace matrix; and

    simultaneously determining estimated values for the incidence direction and delays of dominant wave fronts by solving the invariance equations.

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