Method and apparatus for passive direction finding with sideband determination
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United States of America Patent
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Sep 15, 1992
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N/A
app pub date -
Jul 15, 1991
filing date -
Jul 15, 1991
priority date (Note) -
Expired
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Abstract
A method and apparatus are provided for passive direction finding that demines the sideband and angle of arrival of an incoming radio signal. A four-channel superheterodyne receiver generates quadrature between the radio signals received by each channel. Four inphase/quadrature phase detectors are connected to the receiver for generating inphase and quadrature components of the electrical phase differences between antenna elements of the receiver. The inphase and quadrature components are used for sideband determination and the electrical phase differences are used to derive the angle of arrival.
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