Patent ID: 6127974
Filing Date: 2000-10-03
Classification: G01S

Abstract:
Direction finding apparatus comprisingan antenna having a plurality N of wave-receiving elements, each being adapted to generate complex voltage signals representative of the amplitude, phase, and polarization of a plane wave X from an emitter; anda processor for receiving the voltage signals and programmed to process the voltage signals in accordance with the following algorithm:performing the following steps ##EQU5## wherein V is the fixed received vector of the complex voltages,MX is the port induced voltages (synthesized) by the plane wave X,Step 1 defines the plane wave and induced voltages that best match the received vector V at the specific direction and can be stated as a best plane wave X.sub.b in terms of the pseudo-inverse of MX.sub.b (.theta., .phi.)=(M.sup.t M).sup.-1 M.sup.t V,andStep 2 determines the direction in space for which the synthesized voltages and measured voltages are best matched and is a direction finding estimate.