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Error correcting and detecting method of FPGA (Field Programmable Gate Array) based S mode ADS_B (Automatic Dependent Surveillance-Broadcast) system

A technology of error correction and sampling points, which is applied in the field of air traffic control signal processing, can solve problems such as inaccuracy and lower system reliability, and achieve the effects of high precision, enhanced probability of error correction and detection, and strong reliability

Inactive Publication Date: 2012-12-19
NINGBO CHENGDIAN TAIKE ELECTRONICS INFORMATION TECH DEV
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Problems solved by technology

In addition, in this algorithm, the method of calculating the reference power is the method of directly averaging the sampling point power, which will bring great inaccuracy and reduce the reliability of the system.

Method used

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  • Error correcting and detecting method of FPGA (Field Programmable Gate Array) based S mode ADS_B (Automatic Dependent Surveillance-Broadcast) system
  • Error correcting and detecting method of FPGA (Field Programmable Gate Array) based S mode ADS_B (Automatic Dependent Surveillance-Broadcast) system
  • Error correcting and detecting method of FPGA (Field Programmable Gate Array) based S mode ADS_B (Automatic Dependent Surveillance-Broadcast) system

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[0034] The specific embodiments of the internal signal processing methods of each functional module of the present invention are given below in conjunction with the accompanying drawings. The present invention includes the following four signal processing steps: system test initialization, calculation of reference power value, bit extraction and confidence determination, error correction and detection of messages, such as figure 1 shown. The specific processing flow of each module signal is as follows:

[0035] S1. System detection initialization, initial configuration of data parameters and threshold values ​​in the ADS_B system.

[0036] S2. Determination of the reference power value, such as figure 2 Shown:

[0037] S21. If the power value of a sampling point is greater than the threshold value, and the power values ​​of the subsequent 3 consecutive sampling points or more are above the threshold value, then the position of the sampling point can be regarded as a valid ...

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Abstract

The invention relates to an error correcting and detecting method of an FPGA (Field Programmable Gate Array) based S mode ADS_B (Automatic Dependent Surveillance-Broadcast) system, comprising the following steps of: S1. initializing system detection; S2. calculating reference power; S3. extracting bits, and judging confidence degree; and S4. carrying out error correction and detection on information. The error correcting and detecting method disclosed by the invention has the advantages of effectively carrying out effective bit extraction on received ADS_B information by adopting hardware treatment based on the FPGA under the condition of external disturbance and carrying out the error correction and detection on the received ADS_B information, thereby making a foreshadowing for next information decoding work.

Description

technical field [0001] The invention relates to an air traffic control signal processing method, in particular to an error correction and detection method for an FPGA-based S mode ADS_B system. Background technique [0002] With the rapid development of my country's economy, China's civil aviation transportation industry is also growing rapidly, and there is an unprecedented development situation in the aviation field. The traditional air traffic control system of my country's civil aviation is mainly based on the radar supervision system of the primary radar system and the secondary surveillance radar system. Radar systems are expensive, have limited coverage and limited functionality. ADS-B is a new generation of navigation surveillance technology that is being promoted by the International Civil Aviation Organization, which integrates modern and most advanced data communication, satellite navigation and surveillance technologies. Air traffic navigation, surveillance and ...

Claims

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Application Information

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IPC IPC(8): G08G5/00
Inventor 张超杨瀚程郭焘蒲朝飞吴盼冯岩林红
Owner NINGBO CHENGDIAN TAIKE ELECTRONICS INFORMATION TECH DEV
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