Patent ID: 6597304
Filing Date: 2003-07-22
Classification: G01S,H01Q

Abstract:
A method for sensing phase errors in a coherent multiple receiver array, the method comprising:transmitting first, second, and third signals from corresponding first, second, and third non-collinear transmitters to a target or scene; measuring phase and amplitude of signals reflected from the target or scene corresponding to the first, second, and third transmitted signals received by the multiple receiver array; computing a first sheared product of the received signals corresponding to the first and second transmitted signals representing information about phase error variations of the multiple receiver array as a function of time; computing a second sheared product of the received signals corresponding to the first and third transmitted signals representing information about phase error variations of the multiple receiver array as a function of the positions of the receivers along the multiple receiver array; and determining the phase error associated with each receiver in the multiple receiver array based on the first and second sheared products.