Patent ID: 6671499
Filing Date: 2003-12-30
Classification: H04B

Abstract:
A method for directing an antenna beam, the method being used in the transmission direction in a radio system which comprises transceivers forming antenna beams and in which transmitted signals, which propagate via different paths to the transceiver, are received, characterized in thatdirections of arrival of received signals are estimated on receiving the signals that have propagated via different paths, strengths of signals received from different directions of arrival are measured, and if the directions of arrival of the received signals differ only slightly from one another, a main antenna beam, which is directed towards the direction of arrival of the strongest signal, is formed in the transmission direction, and if the directions of arrival of the received signals differ sufficiently from one another, in addition to the main antenna beam, one or more diversity beams are formed in the transmission direction, which are directed towards the direction of arrival of the received signal, wherefrom a signal exceeding the predetermined threshold value is received.