Unmanned aircraft detection device, unmanned aircraft detection method, and unmanned aircraft detection program

Abstract

By relatively easily suppressing interference waves that affect the transmission waves from unmanned aerial vehicles, it is possible to detect unmanned aerial vehicles with high accuracy. [Solution] The unmanned aircraft detection device according to the embodiment receives the transmitted waves of a wireless aircraft in the receiving unit, detects the period during which the received signal of the receiving unit was affected by interference waves in the signal processing unit and performs blanking processing, detects the communication signal transmitted from the wireless aircraft from the signal outside the blanking processing range, estimates its direction of arrival, and displays the processing result of the signal processing unit in the display unit.

Claims

1. A receiving unit that receives the transmitted waves from a wireless aircraft, A signal processing unit detects the period during which the signal received by the receiving unit was affected by interference waves and performs blanking processing, detects the communication signal transmitted from the radio aircraft from the signal outside the blanking processing range, and estimates its direction of arrival. A display unit that displays the processing results from the signal processing unit. An unmanned aerial vehicle detection device equipped with the following.

2. The unmanned aircraft detection device according to claim 1, wherein the signal processing unit detects the period during which the signal strength of the received signal from the receiving unit exceeds an allowable value as the period during which the signal was affected by the interference wave.

3. The unmanned aerial vehicle detection device according to claim 1, wherein the signal processing unit detects the preamble and data length in the header of the communication wave from the signal received by the receiving unit when the interference wave is a communication wave connected to a wireless network, and determines the start and stop of the blanking process by identifying the period affected by the interference wave from the detection result.

4. The unmanned aircraft detection device according to claim 1, wherein the signal processing unit performs a blanking process by replacing the signal with a value of 0, pseudo-noise, a random number, the previous value, or a value selected from among these.

5. The unmanned aircraft detection device according to claim 1, wherein the signal processing unit continues the blanking process for a certain period of time even after the period affected by the interference wave has elapsed.

6. The receiving unit comprises a reference antenna using radio wave holography and a plurality of receiving antennas. The signal processing unit performs a threshold determination on the signal strength of the received signal of the reference antenna, calculates the percentage of the received signal of the reference antenna during the reception period that is below the threshold as the quality of the received signal, sets a quality threshold for the quality, switches the receiving antenna to another receiving antenna if the quality of the received signal exceeds the quality threshold, and performs reception with the same receiving antenna if it falls below the quality threshold, as described in claim 1.

7. The unmanned aircraft detection device according to claim 6, wherein the signal processing unit makes a determination based on the quality threshold and if the quality is consistently below the quality threshold, it sets a limit on the number of times the same receiving antenna can be used repeatedly.

8. The unmanned aerial vehicle detection device according to claim 1, wherein the signal processing unit creates a reception map by beamforming to estimate the direction of arrival of the received signal data after the blanking process, and outputs the result by taking into account the information of several past reception maps.

9. The unmanned aircraft detection device according to claim 1, wherein the signal processing unit creates spectrum data from the received signal after the blanking process and outputs it taking into account information from several past data points.

10. Receiving the transmission waves from a radio aircraft, The period during which the received signal of the transmitted wave was affected by interference waves is detected and blanking is performed. The communication signal transmitted from the radio aircraft is detected from the signal outside the blanking processing range, and its direction of arrival is estimated. The detection result of the communication signal and the estimated direction of arrival are displayed. Methods for detecting unmanned aerial vehicles.

11. A program that causes a computer to perform the detection of a radio aircraft, The steps include receiving the transmission wave from a radio aircraft, The steps include detecting the period during which the received signal of the transmitted wave was affected by interference waves and performing blanking processing, A step of detecting a communication signal transmitted from the radio aircraft from signals outside the blanking processing range and estimating its direction of arrival, A step of displaying the detection result of the communication signal and the estimated result of the direction of arrival. An unmanned aerial vehicle detection program equipped with the following features.

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