Patent ID: 7126533
Filing Date: 2006-10-24
Classification: G01S

Abstract:
1. A method for determining the angles of arrival of multiple simultaneous radio frequency (RF) cochannel signals received at a P-element antenna array, the method comprising: receiving multiple simultaneous RF cochannel signals at the array; sequentially forming mixtures of the received RF cochannel signals using RF mixture weights, thereby enabling nonsimultaneously sampled mixtures; forming a downconverted baseband mixture for each RF mixture using single channel downconversion; forming data cumulants based on the baseband mixtures; and searching over appropriate degrees of freedom in a mixture manifold including a set of possible data cumulants associated with the array to establish a best fit between the formed data cumulants and the possible data cumulants, thereby determining angle of arrival (AOA) estimates for each of the received cochannel signals.