원문정보
초록
영어
By using MATLAB, a kind of software decoder is designed which has filter and fault correction function and is used in aviation radio communication. Through Morse code text, using dits and dashes to uniquely represent characters such as alphabets、numbers and punctuations (41), those characters are coded through algorithm. A new decoding algorithm is designed which is composed of filtration, binary, difference and zero removal operation. This decoding method is robust and interference immunity, it also has such functions as filtering and fault correction. It can filter the random noise and Gaussian noise so as to reduce the error rate of aviation radio communication and thereby increase the quality of aviation radio communication. This method is checked though an example to decode the word “Hello”.
목차
1. Introduction
2. Basic Design Principle
3. Algorithm
3.1 Wave Form of Basic Element
3.2. Definition of Codes Basic Elements
3.3 Morse-code of String
4. Decoding Algorithm
4.1 Filter
4.2. Binaryzation
4.3 Difference
4.4. Zero Removal and Time Interval of High and Low Voltage Level
4.5. Wave Forms Compare, Obtaining dit, dash, Minimum Time Interval and Space
4.6. Get Character from Morse-code
4.7 Result
5. Program and Results with Gauss Noise and Wrong Code
5.1 Matlab Codes with Gauss Noise and Wrong Code
5.2 Test Results Added with Gauss Noise and Wrong Code
5.3 Result
6. Conclusion
Acknowledgments
References