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Method for wireless communication system planning

  • US 5,828,960 A
  • Filed: 03/31/1995
  • Issued: 10/27/1998
  • Est. Priority Date: 03/31/1995
  • Status: Expired due to Term
First Claim
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1. A computer implemented method of determining signal propagation characteristics for a known environment to determine placement of a receiver comprising:

  • (a) determining each of plural reflective surfaces and each of plural diffractive surfaces of the known environment;

    (b) determining a first image tree for a first transmitter source location within the known environment by;

    (i) determining first order images of the first image tree, for each of the plural reflective surfaces and each of the plural diffractive surfaces, the first order image of the plural reflective surfaces or the plural diffractive surfaces having a limited scope;

    (ii) determining second and higher order images of the first image tree by repeating step (b)(i), for a predetermined number of reflections and diffractions, such that for each of the plural reflective surfaces and plural diffractive surfaces, respectively, a next order image is determined when the plural reflective surfaces or the plural diffractive surfaces have a scope within the limited scope of the prior order image;

    (c) selecting a first receiver location and back-tracing from the first receiver location using the first image tree to determine each one of plural propagation paths from the first receiver location to the first transmitter source location;

    (d) determining a signal quality change for said each one of plural propagation paths; and

    (e) determining a received signal quality measure at the first receiver location based on the signal quality change for said each one of plural propagation paths for use in the placement of the receiver.

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