Patent ID: 6384781
Filing Date: 2002-05-07
Classification: H01Q

Abstract:
A method for calibrating a remote system having a plurality of N elements, N being a positive integer number, an input signal to each of said N elements being processed according to beamforming bits to determine the output of a corresponding element, the output of the plurality of N elements being a composite signal, the method comprising the steps of:(a) transmitting a calibration signal to input the plurality of N elements of the remote system; (b) selecting a first set of beamforming bits for each of the plurality of N elements based upon entries of a predetermined invertible matrix; (c) processing the calibration signal at the remote system according to the beamforming bits for each of the N plurality of elements; (d) detecting a reference signal from the remote system and the composite signal transmitted from the N plurality of elements based on the first set of beamforming bits; (e) repeating steps (b)-(d) for successive sets of beamforming bits to generate a set of signals; and (f) processing the set of signals for generating calibration data for each of the N plurality of elements of the remote system.