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Integrated traffic collision avoidance (TCAS) reshaping and anti-jamming design

A technology of baseband interference and power supply, which is used in aircraft traffic control, instruments, traffic control systems, etc., to achieve the effect of improving anti-interference performance and suppressing interference sources.

Inactive Publication Date: 2011-06-01
XIAN FEISIDA AUTOMATION ENG
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Problems solved by technology

[0008] In order to overcome the problems in existing TCAS shaping and anti-jamming design, the present invention systematically designs the system from two aspects of software anti-jamming and hardware anti-jamming

Method used

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  • Integrated traffic collision avoidance (TCAS) reshaping and anti-jamming design

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Embodiment Construction

[0019] In this embodiment, the anti-jamming performance of TCAS is concentrated on the reception of inquiry and response signals. Therefore, the anti-jamming design of the integrated TCAS receiver is the key to the problem. Its basic structure is attached figure 1 Shown:

[0020] In terms of hardware, it can be seen from the figure that the filter plays a very important role in the integrated TCAS receiver. In the TCAS receiver, there are three main filters, namely pre-select filter, image rejection filter and intermediate frequency filter.

[0021] The pre-selection filter is a 1090MHz bandpass filter, because the S mode response signal is a 1090MHz signal, so the main function of this filter is to filter out high and low frequency interference other than 1090MHz.

[0022] For this heterodyne receiving structure, its biggest disadvantage is that there are many combined frequencies, because the frequency converter is not an ideal multiplier, it is a nonlinear device that can...

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Abstract

The invention provides an integrated traffic collision avoidance (TCAS) reshaping and anti-jamming design in which anti-jamming design is systematically carried out from the aspects of software and hardware. In the invention, aiming at the defects that the design of a hardware filter circuit of the existing TCAS system is backward and the like, a novel and more stable hardware filter circuit is designed according to a Bessel capacitive coupling filter theory, and stable power supply and supply circuit are also designed so as to further improve the anti-jamming capability of the hardware; simultaneously, a finite impulse response (FIR) filter with a strict linear phase and a random amplitude characteristic is designed based on a Megacore function library in a large field programmable gata array (FPGA) especially from the aspect of the software so as to process a low-frequency baseband signal, thereby effectively avoiding the baseband jamming. The stability and anti-jamming capability of TCAS to receive the signal are further improved systematically and effectively from software and hardware aspects.

Description

(1) Technical field: [0001] The invention relates to the signal shaping and anti-jamming design of a new generation of airborne TCAS, and belongs to the field of signal processing and air traffic management safety. (two) background technology: [0002] The anti-collision system on the aircraft, the American aviation system is called the air traffic warning and anti-collision system (hereinafter referred to as TCAS), and the European aviation system is called the airborne collision avoidance system. The meaning and function of the two are the same, and the composition is basically the same. Similar, therefore, the description of the application of the present invention is described with TCAS as the technical background. [0003] After years of development, TCAS system has developed a variety of models, such as: TCAS I, TCAS II, TCAS III, TCAS IV. Among them, TCAS II is currently the most widely used. It can provide aircraft pilots with traffic reminders (TA) that display inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G5/04
Inventor 史忠科黄溢
Owner XIAN FEISIDA AUTOMATION ENG
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