Comparative analysis of interference, noise and losses in the mobile communication systems in millimeter wave range

2018;
: pp. 18-25
1
State University of Telecommunications
2
State University of Telecommunications

The article analyzes the approaches to the mathematical modeling of mobile systems in the millimeter wave range. The architecture of a mobile network using Radio over Fiber (RoF) technology is considered which is proposed for forming and transmitting the millimeter-wave signals via fiber-optic communication lines. The noise of the optical heterodyne used for the formation of radio signals is analyzed. The mathematical analysis of the components of the energy budget of the radio link in the millimeter wave range is carried out on the basis of a study of the fundamental physical aspects that affect the value of noise, losses and signal gains. The comparative analysis of the signal-to-interference ratio and the signal-to-noise ratio, the probability of transmitting information radio signals through the reflected paths is carried out. A quasi-optical model of the narrow-beam antenna radiation is proposed for calculating noise interference and signal loss in multipath propagation models taking into account multiple reflections and diffractions, as well as absorption in various media. The analysis of the energy budget components of the radio link in the millimeter wave range shows that it is necessary to take into account both interference and noise associated with the method of signal generation and emission, for example, in phased antenna arrays, as well as the effects of molecular absorption (repeated radiation) in the atmosphere and the effects of the reflection of signals in urban scenario.

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