Patent ID: 6134261
Filing Date: 2000-10-17
Classification: H04B

Abstract:
A highly bandwidth-efficient communications method, comprising the steps of:forming a first calibration burst at a first antenna element of a base station, including a plurality of tone frequencies arranged in a distinctive orthogonal frequency division multiplexed pattern unique to said base station;forming a second calibration burst at a second antenna element of said base station, including said plurality of tone frequencies arranged in said pattern;sequentially transmitting said first calibration burst from said first antenna element and said second calibration burst from said second antenna element;receiving said first and second calibration bursts at a remote station and measuring a value related to a relative phase difference between therebetween;transmitting said value back to said base station and calculating therefrom a beam steering correction at said base station to modify said relative phase difference; andapplying said beam steering correction to first and second traffic bursts respectively transmitted from said first and second antenna elements at said base station to said remote station.