Patent ID: 6643526
Filing Date: 2003-11-04
Classification: H04B,H04W

Abstract:
A method of directional radio communication between a first station and a second station, said method comprising the steps of:defining at the first station a plurality of beam directions for transmitting signals to said second station, each of said beam directions being selectable and being generated by an array of antenna elements, each of said elements receiving a signal to be transmitted; selecting a plurality of beam directions at said first station in which said signal is to be transmitted from said first station to said second station; transmitting said signal in said plurality of beam directions, the power level of the signal transmitted in each of said selected plurality of beam directions being individually selectable, wherein first and second sequential signals are to be transmitted to said second station, said transmitting step further comprising altering the phase of the first and second signals to be transmitted in at least one of said selected beam directions defined by said antenna array; whereby the phase of the first signal transmitted in at least two of the beam directions differs, the phase of the second signal transmitted in said at least two beam directions differs and the phase difference of the first signal transmitted in said at least two beam directions is different from the phase difference of said second signal transmitted in said at least two beam directions.