Patent ID: 7714781
Filing Date: 2010-05-11
Classification: H01Q

Abstract:
1. A method of analog beamforming in a wireless communication system, comprising the steps of: constructing analog beamforming coefficients by: determine a peak of π(θ) and a corresponding θ*, where θ* is an estimated angle of departure, and estimating a transmit beamforming vector as {right arrow over (w)}={right arrow over (b)}(θ*); and wherein estimating the transmit analog beamforming coefficients comprises: determine a peak of ρ(φ) and a corresponding φ*, where φ* is an estimated angle of arrival, and estimating a receive beamforming vector as {right arrow over (v)}={right arrow over (a)}(φ*), where d is an inter-antenna distance, φ is the angle of departure and θ is the angle of arrival, N is a number of transmit antennas, M is a number of receive antennas, K is a number of subcarriers, j is a positive integer.