Patent ID: 6546256
Filing Date: 2003-04-08
Classification: G01S

Abstract:
An apparatus for measuring an angle-of-arrival of a signal from a wireless communications transceiver comprising:a local phased-array antenna, comprising first and second antenna elements, and associated signal conditioning means for receiving first and second versions of a signal from the wireless communications transceiver, said first version being received via said first antenna element and said second version being received via said second antenna element; a signal characterization processing unit for generating replicated signal data, wherein said replicated signal data comprises a representation of the signal from the wireless communications transceiver which is substantially devoid of noise or distortion corruption; and a signal correlation processing unit at the sensor station for performing matched-replica correlation processing to produce an angle of arrival (AOA) of the signal from the wireless communications transceiver; wherein said matched-replica correlation processing comprises (a) generating a first correlation function by correlating said replicated signal data with said first version, (b) generating a second correlation function by correlating said replicated signal data with said second version, and (c) generating a third correlation function by correlating said first correlation function with said second correlation function, wherein said third correlation function is indicative of the AOA of the signal from the wireless communications transceiver.