Signal detection method and apparatus based on broadcast type automatic dependent surveillance

Abstract

The invention relates to a signal detecting method and a signal detecting device that are based on broadcast-typed automatic related monitoring; wherein, the signal detecting method comprises the following steps: width detection of a received expanded intermittent oscillating signal is implemented, thus obtaining a pulse signal; leading edge detection of the pulse signal is implemented, thus obtaining a pulse leading edge indicating signal; time calibration of a position of the pulse leading edge indicating signal is implemented, and the calibrated pulse leading edge indicating signal is sent out; fore header detection of the calibrated pulse leading edge indicating signal that is received is implemented, thus determining whether the fore header is effective; the effective fore header is verified, and the expanded intermittent oscillating signal with effective fore header is determined as a final effective expanded intermittent oscillating signal. The signal detecting method and device that are based on broadcast-typed automatic related monitoring determine whether the expanded intermittent oscillating signal with effective fore header is a final effective expanded intermittent oscillating signal by further verifying the effective fore header, thus effectively raising the success ratio of signal detection.

Description

technical field [0001] The invention relates to signal detection technology, in particular to a signal detection method and device based on broadcast automatic dependent monitoring; it belongs to the field of aviation technology. Background technique [0002] With the rapid development of aerospace technology, it is an important content of air traffic control to make the aircraft on the route safe, effective and planned to fly in the airspace. Air traffic control needs to monitor the flight dynamics of aircraft in the airspace in real time. [0003] The traditional radar surveillance method uses the inquiry and response method to detect the target, but the radar system itself has many limitations, which limit the improvement of surveillance performance. The straight-line propagation of the radar beam forms a large number of radar blind spots, which cannot cover areas such as oceans and deserts; radar The rotation period limits the improvement of the data update rate, thereby...

AI Technical Summary

Problems solved by technology

The current ADS-B can be realized by using several data links such as 1090 extended intermittent oscillation (1090ES), universal access transceiver UAT and very high frequency data link mode 4 (VDL4), especially the use of 1090ES data link is low in cost and system compatible Good performance and wide application range; however, the existing detection method for 1090ES extended discontinuous oscillation signal judges the validity of the signal by detecting the leading head, and it is easy to determine the false leading head as the effective leading head, which greatly reduces the The detection success rate of effective signal

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