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vol 63 / December, 2020
Article

DOI 10.17586/0021-3454-2018-61-12-1045-1051

UDC 004.627

ADAPTIVE ALGORITHM OF INFORMATION CODING IN AUTONOMOUS SYSTEM

S. I. Tomashevich
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), Saint Petersburg, Russia; student


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Abstract. A procedure of adaptive coding of signals in dynamic systems for subsequent data transfer to another system is presented. An algorithm for the signal quantization level adjusting is proposed based on calculation of moving average norm. A numerical and experimental investigation of the proposed algorithm is carried out, the process of its operation is described. As the encoded signal, the data obtained from a real quadrocopter moving in vertical plane is used. Results of numerical simulation demonstrate the applicability of the proposed algorithm for coding signals in a real dynamic system. The adaptive coding algorithm is implemented in software for use with radio modems for subsequent transfer to a real quadrocopter. The logic of the program and method of formation of information packages based on the results of coding are described. The quality of encoding of harmonic signals of different frequencies is numerically investigated; the influence of the rate of change of signals on the quality of the received signal is characterized by the standard deviation. Recommendations are given to improve the quality of coding with a known character of the original signal.
Keywords: adaptive coding, data transfer, bandwidth, dynamic systems, quadrocopter

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