Patent ID: 6304213
Filing Date: 2001-10-16
Classification: H01Q

Abstract:
A method for statistically modeling the operation of a directional antenna in a wireless link, the method comprising:transmitting from a base antenna having a first configuration in relation to an environment;rotating a narrowbeam, receiving antenna over 2.pi. radians and periodically measuring pointing angle and received power of transmission signals received from the directional antenna; anddetermining a gain reduction factor .DELTA. corresponding to operation of the directional antenna in the first configuration of the environment based on the periodically measured pointing angle and received power of the transmission signals, wherein the gain reduction factor .DELTA. for the directional antenna depends on an angle-of-arrival distribution, s(.theta.), where .theta. is an azimuth angle and s(.theta.) is a received power density with respect to .theta. and, wherein the gain reduction factor .DELTA. is modeled as: ##EQU5##wherein .DELTA.' is a gain reduction factor obtained from an imperfect estimate of the received power density calculated based on the angle-of-arrival distribution, s(.theta.), Emax is the maximum possible dB error of the gain reduction factor .DELTA., and G.sub.o is dB gain of the directional antenna.