Patent ID: 7043272
Filing Date: 2006-05-09
Classification: G01S,H04B

Abstract:
1. In a frequency division duplex (FDD) mobile communication system, an apparatus for forward beamforming in a base station using an array antenna, comprising: an arrival angle range estimation means for estimating an angle of arrival (AOA) range of a user signal from a reverse link received data and generating an estimated AOA range; an array receiver and demodulation means for spatial-filtering a data received through the array antenna and demodulating a data fed back from a terminal; a forward beamforming weight control means for calculating a plurality of transmission beamforming weights steering the estimated AOA range and selecting one beamforming weight steering a direction with a best forward channel condition for data channel transmission using the feedback data; and a forward beamforming and modulation means for transmitting the data channel signal using the selected beamforming weight and transmitting a user pilot signal by sequentially using the plurality of the transmission beamforming weights at different time areas.