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Multi-interleaved aviation response signal simulator

A technology for answering signals and simulators, applied in simulators, instruments, transmission systems, etc., can solve the problems of increasing the number of 1090MHz signals and increasing the possibility of signal overlap, achieving high timing control accuracy, improving flexibility and convenience performance, improved accuracy

Inactive Publication Date: 2020-05-01
中国人民解放军91977部队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3) The use of TCAS will also increase the number of 1090MHz signals
4) The sensitivity of the new ADS-B ground station equipment and airborne ADS-B In receiver is improved, and the coverage area is expanded, so the possibility of signal overlap increases

Method used

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  • Multi-interleaved aviation response signal simulator

Examples

Experimental program
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Effect test

Embodiment 1

[0022] like figure 1 As shown, it includes a management control module, a synthesizer unit, and four independent aviation response signal generation channels, where each generation channel is composed of a baseband signal generation unit, a local oscillator and an up-conversion unit, a programmable attenuator and a splitter . The PC sends the signal parameters to the management control module through the network interface, and can generate non-interleaved, double-interleaved, triple-interleaved and quadruple-interleaved aviation response signals.

[0023] figure 2 is a schematic diagram of the resulting baseband signal. Channel 1 generates a Mode A / C response with a short repeat interval (the repeat interval can be precisely set and controlled), see figure 2 .a. Channel 2 generates a Mode S short message response, see figure 2 .b. Channel 3 generates a Mode S long message response, see figure 2 .c. Channel 4 generates ADS-B messages, see figure 2 .d. The startin...

Embodiment 2

[0027] On the basis of Embodiment 1, the number of signal channels can be reduced. If it is reduced to two signal channels, it can realize double interleaved aviation response signal simulation. It can meet the testing requirements in most cases.

Embodiment 3

[0029] On the basis of Embodiment 1, the number of signal channels can be increased. If two signal channels are added, the double-six-fold interleaved aviation response signal simulation can be realized. It can satisfy the simulation of signals in more complex scenarios.

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Abstract

The invention relates to a multi-interleaved aviation response signal simulator, and belongs to the technical field of signal generators. The simulator comprises a PC and a management control module.The PC is connected with the management control module through a network interface; the management control module generates at least one baseband signal generation unit according to signal parameterssent by the PC, wherein the baseband signal generation unit is connected with a local oscillator and up-conversion unit, the local oscillator and up-conversion unit is connected with a programmable attenuator, the programmable attenuator is connected with a distributor, and the distributor divides signals into two paths to be respectively transmitted to an output channel and a synthesizer. The beneficial effects of the invention are that the multi-interleaved aviation response signal simulator has the capability of generating various types of aviation response signals, employs a single FPGA for control, is simple in structure, is high in reliability, is high in time sequence control precision, and is convenient to achieve because multiple paths of baseband are generated at the same time. An independent local oscillator is adopted, the frequency and the phase have certain randomness, and aviation response signals emitted by different airplanes can be realistically simulated.

Description

technical field [0001] The invention relates to a signal simulator, in particular to a multiple interweaving aviation response signal simulator, which belongs to the technical field of signal generators. Background technique [0002] Aviation transponders are a staple of air traffic management and are installed on nearly every aircraft. At present, the response signals sent by civil aviation airborne transponders include A-mode codes, C-mode altitudes, S-mode information, and ADS-B broadcast information. These signals all use the 1090MHz channel, so there is a possibility that they occur simultaneously and overlap each other. In a local area, various technologies such as addressing response, AC suppression, and sensitivity control are adopted to reduce the respective emissions, thereby reducing the possibility of signal overlap. For the ADS-B broadcast signal, the technology of random jittering of the transmission interval is adopted to reduce the influence of signal overl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B1/59G05B19/042
CPCG05B19/042H04B1/59H04B17/0087
Inventor 李成军应文威张鹏刘旭波杨润秋刘敬蜀金轴胡勤莲胡兵黄訸
Owner 中国人民解放军91977部队
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