Direction-finding method for determining the incident direction of a high-frequency electromagnetic signal
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United States of America Patent
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Nov 6, 2001
Grant Date -
N/A
app pub date -
Oct 13, 1998
filing date -
Oct 10, 1997
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Abstract
A direction-finding method for determining an incident angle of a high-frequency electromagnetic signal in a system including at least two receiving antennas spaced apart by a known distance. the antenna output signals of the at least two receiving antennas are converted, together (in accordance with a multiplexing procedure) or individually, into the frequency domain through a Fourier transformation, followed by a conversion into an IF range and an A/D conversion. In this range, the phase difference between the output signals is determined and the signal frequency of the incident wave is determined through a phase-sequence analysis. The incident angle of the incident wave is determined from the phase difference and the signal frequency.
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