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2FSK decoding system and method based on data coding type and verification mode

A 2FSK, data coding technology, applied in the direction of FM carrier system, etc., can solve the problem of wrong decoding and loss of a large amount of data, so as to solve the problem of wrong decoding and loss of a large amount of data, and achieve simple results

Active Publication Date: 2019-09-17
BEIJING INST OF REMOTE SENSING EQUIP
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Problems solved by technology

[0003] The purpose of the present invention is to provide a 2FSK decoding system based on data encoding type and verification method, which solves the problems that traditional decoding methods are prone to misdecoding and loss of a large amount of data

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  • 2FSK decoding system and method based on data coding type and verification mode
  • 2FSK decoding system and method based on data coding type and verification mode

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the present invention will be more clear. It should be noted that all the drawings are in very simplified form and inaccurate scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0017] It should be noted that, in order to clearly illustrate the content of the present invention, the present invention specifically cites multiple embodiments to further explain different implementation modes of the present invention, wherein the multiple embodiments are enumerated rather than exhaustive. In addition, for the sake of brevity of description, the content mentioned in the previous embodiment is often omitted in the latter embodiment, therefore, the content not mentioned in the later embo...

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Abstract

The invention discloses a 2FSK decoding system and method based on a data coding type and a verification mode. The 2FSK decoding system comprises a signal down-conversion module, a signal state judgment module and a decoding processing module, wherein the output end of the signal down-conversion module is connected with the input end of the signal state judgment module, and the output end of the signal state judgment module is connected with the input end of the decoding processing module; the signal down-conversion module performs down-conversion on the intermediate frequency 2FSK signal; the signal state judgment module judges the state of the 2FSK signal; and the decoding processing module carries out decoding processing on the 2FSK signal based on the data coding type and the verification mode. The 2FSK decoding system and method are simple to realize, adopt a mode of distinguishing data coding types and combining three-state-strict decision, two-state-wide decision and the verification mode to verify all information, so as to solve the problems that a traditional decoding method is easy to generate error decoding and loses a large amount of data.

Description

technical field [0001] The invention relates to a 2FSK decoding system and method based on data encoding type and check mode. Background technique [0002] The decoding performance of 2FSK command signal is an important technical index of aircraft communication equipment. The traditional 2FSK decoding method is: After the intermediate frequency 2FSK signal is down-converted, the signal state is judged to generate binary "0" and "1" video codes. This method is relatively simple to implement, but there are two disadvantages. First, the 2FSK signal video code only has "two states": binary "1" code and "0" code, while the 2FSK signal has "three states": f1 represents binary " 1" code, f2 represents binary "0" code and non-f1 non-f2 signal, so the corresponding relationship of judgment cannot be realized; secondly, in the case of serious interference such as noise and spurs, if the data encoding type and verification method are not used Signals are treated differently. Using "t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/14
CPCH04L27/14
Inventor 李海昊黄印刘晓宽蒋瑞环魏琳
Owner BEIJING INST OF REMOTE SENSING EQUIP