PREDICTION OF INDOOR ELECTROMAGNETIC WAVE PROPAGATION FOR WIRELESS INDOOR SYSTEM ENGINEERING

摘要

Methods are disclosed for predicting RF propagation within a structure such as abuilding, characterized by the following steps. A reference transmitter location and aplurality of reference receiver locations are selected. For each reference receiver location,RF propagation pathways are determined with respect to the reference transmitterlocation. The RF propagation pathways include a direct path joining the referencetransmitter location to a given reference receiver location across a straight-line path, aswell as one or more reflection paths joining the reference transmitter location to a givenreference receiver location via reflections from one or more reflective surfaces. One ormore propagation pathways may pass through an RF obstacle, such as, for example, alossy dielectric material. Each reflective surface and RF obstacle is associated with areflection coefficient and a transmission coefficient. These coefficients are computed foreach object and surface from a multilayer dielectric model, maintaining angle andpolarization dependencies. For each propagation pathway, a propagation componentconsisting of the propagation loss relative to free-space propagation is calculated as theproduct of the magnitude squared of the reflection and transmission coefficients. Thelocal mean of received RF power at each of the reference receiver locations is calculatedas the scalar sum of the powers of all the propagation pathway components reaching thespecified location.