Research In Algorithm Of Avionics Data Compression And Transmission

As the scale of integrated avionics system is expanding, the number of system information is increased. Massive data transmission has become the avionics system problems to be solved. The data compression as the most effective techniques to solute this problem has been paid more and more attention. To find a more suited compression algorithm has a more important value both in theoretical research and engineering. Final selection is based on a dictionary lossless data compression algorithm ,because it has been proved to have good data compression and restoration properties by theoretical analysis and testing.This thesis focuses on the principles of error control techniques and implementation, which is based on serial communication, and including CRC error coding and retransmission technology. Followed by, the adaptive Huffman, LZW compression algorithm and implementation methods is detailed discussed. Combining the characteristics of avionics data, a modified LZW algorithm is put forward. The algorithm reduces the coding bits and the compression ratio by reducing the dictionary size. The combination of error control and data compression to solve efficient and reliable data transmission problems of large-scale avionics. The completion of the simulation software is based on two algorithms. The algorithm is proved to have good results and stable performance by the actual avionics system testing. After comparing several major prevalent viewable software developing environments, This thesis adopts Delphi for system development which has friendly human-machine interface according to characteristics of the system, and the system functions are tested in the laboratory environment.