Прогнозування втрат у системах стільникового зв`язку за допомогою нейронних мереж

Abstract

The paper considers a method for determining power losses of signal propagation in a cellular system. The new century is characterized by the rapid introduction of cellular communications in all areas of human life. The cellular signal transmis-sion paths from a transmitter to a receiver may be different: from a line-of-sight to а densely built-overlocality. Unlike fixed-line wiring, wireless radio channels have random parameters that are difficult to analyze. That is why radio link modeling is the most difficult task when designing cellular communication systems. Most cellular systems operate in cities where there is no direct vision between antennas of a base and mobile stations. In addition, the presence of high buildings leads to large diffraction losses. Also, the interference of radio waves due to re-reflection from different objects causes a significant change in the signal level. One of the promising fields of modern technology is artificial neural networks. An important feature of neural networks is the parallel processing of information by a large number of neurons at the same time. Typical tasks that can be solved using neural networks are: control, encoding and decoding of information, classification, forecasting, automa-tion of a decision-making process, pattern recognition and more. Neural networks are used in telecommunication systems to solve the following tasks: traffic control, channel allocation, switching, and adaptive routing. The paper proposes to use a neural network for increasing the accuracy of power loss determining for cellular system signal propagation. After creating asoftware or hardware solution for the neural network, a mathematical model of the network must be created and the network training must be performed. The proposed neural network is a multilayer perceptron. The paper presents the proposed architecture of the perceptron. The number of neurons in all the layers has been substantiated. The operation of the multi-layered perceptron has been described