ADS-B signal overlapping reconstruction separation method based on satellite-borne scene

A separation method and signal technology, applied in the field of signal processing, can solve problems such as monitoring information loss, achieve the effects of ensuring reliable demodulation, improving the success rate of information demodulation, and improving the demodulation probability

Active Publication Date: 2021-08-06
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

This method can solve the problem that ADS-B signal frames overlap seriously in the time domain and cause a large amount of monitoring information to be lost when monitoring a dense area of ​​receiving aircraft in a space-borne scenario.

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  • ADS-B signal overlapping reconstruction separation method based on satellite-borne scene
  • ADS-B signal overlapping reconstruction separation method based on satellite-borne scene
  • ADS-B signal overlapping reconstruction separation method based on satellite-borne scene

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] Such as figure 1 Shown, a kind of ADS-B signal overlapping reconstruction separation method based on spaceborne scene, it comprises the following steps:

[0047] (1) Receive the satellite-borne ADS-B signal, strip the carrier wave of the ADS-B signal after AD quantization, and generate an envelope waveform; the specific method is:

[0048] When the ADS-B signal is received, the antenna link is generally used to convert the signal into an amplified intermediate frequency signal, and then quantized by the AD analog-to-digital conversion chip to output the ADS-B digital intermediate frequency signal S(n), and the stripped digital Carrier of the intermediate frequency signal to obtain the ADS-B zero intermediate frequency complex signal S 0 (n), the stripping method is:

[0049]

[0050] Among them, F s is the sampling frequency of th...

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Abstract

The invention discloses an ADS-B (Automatic Dependent Surveillance-Broadcast) signal overlapping reconstruction separation method based on a satellite-borne scene, and belongs to the technical field of signal processing. The method comprises the following steps of: firstly, detecting and judging overlapped signals, respectively completing starting time detection of a strong ADS-B signal and a weak ADS-B signal in double overlapping, intercepting a signal sampling point containing the length of two overlapped signals, completing demodulation of the strong signal in overlapping, then performing signal modulation and reconstruction by utilizing the amplitude and information bit of the strong ADS-B signal, and stripping the strong signal from the original waveform, and finally demodulating the weak ADS-B signal to obtain all ADS-B information in the overlapped signal. The method can be used in the field of satellite-borne scene ADS-B signal monitoring, ADS-B signal overlapping separation in a dense area is achieved, and the information demodulation success rate is increased.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to an ADS-B signal overlapping reconstruction separation method based on a spaceborne scene. Background technique [0002] With the increasing number of aircraft targets in various countries in the world, the use of spaceborne ADS-B monitoring means to complete global flight monitoring has become the main method. However, due to the wide-area characteristics of the space-borne scene, unlike ground-based ADS-B monitoring that monitors hundreds of targets at the same time, low-orbit satellites can monitor more than a thousand targets at the same time. Since the ADS-B signal is transmitted in a random broadcast mode, there is a very serious signal time domain overlap probability in the dense area of ​​the aircraft, resulting in a very serious demodulation failure, which leads to the loss of a large number of target monitoring information. Therefore, it is necessary to take c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G5/00H04B7/185
CPCG08G5/0073H04B7/18513
Inventor 刘亮蔚保国易卿武邓志鑫王振华叶红军贾诗雨郎兴康杨建雷赵精博李硕秦明峰
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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