A tcas image frequency suppression system and its design method, device and electronic equipment
A technology of mirror frequency and design method, applied in transmission systems, electrical components, etc., can solve the problems of complex analog front-end circuits, lack of scalability and portability of analog circuit receiving systems, and heavy weight, and achieve excellent scalability. Effect
Active Publication Date: 2022-03-08
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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Problems solved by technology
However, this solution needs to be equipped with corresponding analog mixers, and at the same time, it is necessary to design analog signal processing channels for the two operating frequencies. In each processing channel, it is necessary to configure analog filters, multi-stage amplifiers and peripherals that match the operating frequency. circuit, so the analog front end of this scheme has the disadvantages of complex circuit, large volume, and heavy weight. The system does not have good scalability and portability
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[0045] Embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings.
[0046] Embodiments of the present disclosure are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. The present disclosure can also be implemented or applied through different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, a...
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Embodiments of the present disclosure provide a TCAS image frequency suppression system and its design method, device and electronic equipment, which belong to the technical field of radar signal processing. Including: selecting an analog broadband filter that meets the requirements of image frequency rejection, and determining the stopband cut-off frequency of the analog broadband filter; calculating the sampling rate interval of the TCAS interrogation signal and the sampling rate interval of the TCAS response signal; calculating and simultaneously covering the TCAS interrogation signal The common sampling rate interval of the sampling rate interval and the sampling rate interval of the TCAS response signal; select the analog-to-digital converter whose sampling rate interval can be configured to cover the common sampling rate interval; connect the amplifier between the analog broadband filter and the analog-to-digital converter, A digital down-conversion processing unit is connected to the output end of the analog-to-digital converter to form an image frequency suppression system for TCAS. In this way, the analog-digital sampler is closer to the antenna, has obvious volume and weight advantages, and has excellent scalability, development flexibility and portability.
Description
technical field [0001] The present disclosure relates to the technical field of radar signal processing, in particular to a TCAS image frequency suppression system and its design method, device and electronic equipment. Background technique [0002] The air traffic collision avoidance system (English: Traffic Alert and Collision Avoidance System, referred to as TCAS), is an important subsystem in the integrated surveillance system to ensure the all-weather flight safety of civil airliners. It needs to receive the inquiry signal and the working frequency at the same time. It is the response signal of 1090MHz and decodes it. In order to improve the anti-interference ability of the TCAS system, the Do-181E standard of the Aeronautical Radio Technical Committee strictly stipulates the signal suppression index of the TCAS system under the specified frequency point and waveform input. The attenuation and suppression performance of the TCAS receiver for the interference signal dete...
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IPC IPC(8): H04B1/10H04B1/16
CPCH04B1/10H04B1/16
Inventor 吴耀君史志举薛婧
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA