| 摘要 |
<p>A system for detecting a direction of a frequency hopping signal according to the present invention comprises: a direction detection device (100) to generate a first time tag corresponding to a time point at which a fast Fourier transform (FFT) is performed on a signal received through an antenna selected among a plurality of antennae (antenna 1, antenna 2, ..., antenna M), and attach the first time tag to a frequency hopping signal detected based on an FFT result of the signal; and a signal detection device (200) to receive a clock synchronized with a clock of the direction detection device (100), generate a second time tag corresponding to a time point at which a fast Fourier transform (FFT) is performed on a broadband signal, and attach the second time tag to an azimuth angle of arrival calculated based on an FFT result of the broadband signal. The signal detection device (200) receives calculated azimuth angle of arrival information and frequency information of the azimuth angle of arrival from the direction detection device (100), and extracts the azimuth angle of arrival of the frequency hopping signal detected based on the azimuth angle of arrival to which the second time tag matching the first time tag is attached and the frequency information. Accordingly, the system for detecting the direction of the frequency hopping signal can detect a target frequency hopping signal and detect the direction of the target frequency hopping signal quickly and accurately even in an environment where signals arriving from a plurality of signal sources are mixed.</p> |
