Large-scale fading factor calculation method and system for wireless channel

Abstract

The invention discloses a large-scale fading factor calculation system for a wireless channel. The system comprises a model establishment module, an initialization module, a spherical reflection coefficient calculation module, a path loss calculation module, a shadow fading calculation module and a result output module, wherein the model establishment module is used for establishing a two-path spherical reflection model; the initialization module is used for initializing antenna characteristics and earth surface characteristics; the spherical reflection coefficient calculation module is used for calculating a spherical reflection coefficient caused by a spherical curvature during the far-field flight of an unmanned aerial vehicle; the path loss calculation module is used for calculating electromagnetic wave loss, caused by the increment of roughness of the surface of the earth, of electromagnetic waves of reflection paths; the shadow fading calculation module is used for calculating shadow fading, caused by the blockage of a building, of the electromagnetic waves in an actual propagation environment; the result output module is used for determining an overall large-scale fading factor. The invention also provides a large-scale fading factor calculation method for the wireless channel. According to the large-scale fading factor calculation system and the large-scale fading factor calculation method for the wireless channel, the requirements of communication modeling and system evaluation are met.

Description

technical field [0001] The invention relates to the technical field of wireless channels, in particular to a method and system for calculating large-scale fading factors of wireless channels suitable for far-field flight of unmanned aerial vehicles. Background technique [0002] As a new type of high-tech equipment, UAV is playing an increasingly important role in modern warfare. The normal performance of UAV communication performance plays a decisive role in realizing the combat performance of the entire army. The modern battlefield environment is becoming more and more complex, which puts forward higher requirements for the effectiveness and reliability of UAV communication. Wireless channel models are crucial to evaluating the performance of any digital mobile communication system, and the characteristics of the channel have a great influence on the transmission of signals. The UAV communication channel is a wireless channel, which is a key factor affecting the performa...

AI Technical Summary

Problems solved by technology

The traditional calculation method only simply considers the path loss of free space, but does not consider the electromagnetic wave loss caused by rough surface reflection in the actual environment, the shadow fading caused by tall buildings and the curvature of the earth, and it is difficult to be close to the communication modeling and system assessment needs

Images