A Radar Track Message Coding Method
A coding method and message technology, applied in the direction of digital transmission system, error prevention, electrical components, etc., can solve the problems of not using continuous dot trace data unchanged information, affecting real-time data processing, consuming transmission resources, etc., to achieve enhanced Real-time processing and use effects, reducing transmission resource consumption, and reducing transmission effects
Active Publication Date: 2020-09-08
NANJING LES ELECTRONICS EQUIP CO LTD
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[0004] Directly use the above-mentioned data compression coding method to encode the radar track message, without using the invariable information between continuous point track data, and still need to consume transmission resources for the same data between messages, when the amount of data is particularly large, it will Real-time processing of impact data
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[0023] The present invention will be further clarified below in conjunction with the drawings and specific embodiments.
[0024] This embodiment takes the widely used "European Aviation Safety Organization Surveillance Data Exchange Standard Document" Part 7: Single Sensor Surface Motion Data Information Standard Format CAT 010 message format as an example to illustrate the coding process of the radar track report. This protocol belongs to the radar track message described in the present invention, and the protocol frame format is as follows: " ", each field starts with Separate to show distinction, the information represented by each field is as follows:
[0025] Cat-message type description CAT, one byte;
[0026] Len-length field LEN, two bytes;
[0027] Fspec——FSPEC, indicating which fields in the message structure, variable length;
[0028] Data——Data;
[0029] The specific format is as follows:
[0030]
[0031] Field : 0a, message type description, indicating that ...
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The invention discloses a radar track message encoding method. The radar track message encoding method comprises the following steps: 1, reading a frame of radar track message, and generating magic words; 2, judging whether a key field is hit; if not, skipping to step 3; if so, defining the current frame as a P frame, adding a P frame header identifier and the magic words retrieved in the I frameto the message, figuring out a residual between the P frame and the I frame, performing simplified Hoffman encoding on the residual, and skipping to step 4; 3, retrieving whether the magic words haverepeated items in a magic word list; if so, defining the current frame as a non-archiving I frame, and constructing a code stream; otherwise, defining the current frame as the P frame, constructing the code stream, adding the magic words and the code stream of the I frame to the magic word list; and step 4, judging whether a next message is provide, if so, skipping to step 1, and otherwise, endingthe encoding. By adoption of the radar track message encoding method, the transmission resource consumption of the same data can be reduce, the message compression ratio is improved, and the integrity and instantaneity of data transmission are guaranteed.
Description
Technical field [0001] The invention belongs to the technical field of radar data processing, and specifically relates to a lossless compression coding method for radar track messages. Background technique [0002] The radar track message is composed of point trace messages, which are organized according to a fixed protocol. The radar track message is usually encoded and compressed before transmission. [0003] Data compression methods can be divided into two types according to whether there is loss of information before and after compression, namely lossy compression and lossless compression. Lossy compression refers to the use of compressed data for reconstruction (or called restoration, decompression), and the reconstructed data is different from the original data; while lossless compression refers to the use of compressed data for reconstruction, The data is exactly the same as the original data. Typical lossless compression methods include run length coding, Huffman coding, ...
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IPC IPC(8): H04L1/00
CPCH04L1/0056H04L1/0063H04L1/0083
Inventor 常传文茅文深徐勇才智张波李韩芬孙海军季奕周源姜飞虎
Owner NANJING LES ELECTRONICS EQUIP CO LTD