| 摘要 |
An apparatus and method for measuring the angles of arrival of a pair of transmission signals relative to a fixed antenna pair simultaneously receiving the transmission signals based upon the phase difference between antennas for each signal and the frequencies thereof includes components for separately squaring the signals received by each antenna, filtering each squared signal for separating a high frequency band and a middle frequency band, first phase correlating high frequency band signals filtered from each squared signal for producing a sum signal of the phase differences between the antennas for received transmission signals, second phase correlating middle frequency band signals filtered from each squared signal for producing a difference signal for the phase differences of the transmission signals received by the antenna pair, determining the phase differences of the transmission signals received by the antenna pair from the sum and difference signals therefor, providing delayed middle frequency band signals filtered from a squared signal from one of the antennas, third phase correlating the delayed middle frequency band signals from the one of the antennas with the middle frequency band signals of the other of the antennas for producing a correspondence signal related to the correspondence between the frequencies and the determined phase differences, and computing the angles of arrival of the pair of transmission signals using the determined phase differences, the frequencies and the correspondence signal.
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