Simulation method of radio signal rain attenuation feature

Abstract

The invention provides a simulation method of radio signal rain attenuation feature, which aims to provide a simulation method of rain attenuation feature with strong universality and high control precision. The simulation method comprises the steps that a simulator monitors the computer and a simulator monitoring software of the mathematical model of radio signal rain attenuation feature; a downconverter transfers the received wireless radiofrequency signal into an intermediate frequency signal through down conversion; the precise amplitude adjusting is conducted on a precise amplitude adjusting device (1) disposed in the FPGA chip and the precise amplitude adjusting device is sent to one input end of a synthesizer; the precise amplitude adjusting is conducted on noise signal generated by a noise generator in the FPGA through a precise amplitude adjusting device (2), and the noise signal is sent to the other input end of the synthesizer; after the two path signals input in the synthesizer are synthesized, the two path signals are transferred into simulation signal through a digital analog converter D / A, and then are sent to a digital control attenuator for amplitude adjusting; the intermediate frequency signal after the amplitude adjusting are converted into the radiofrequency signal through a upconverter in a manner of upconversion and are output, and the amplitude and signal to noise ratio of the radiofrequency signal change with the rain attenuation feature.

Description

technical field [0001] The invention relates to a method for simulating the rain attenuation characteristics of radio signals. Background technique [0002] With the continuous expansion of the measurement and control business, the requirements for the measurement and control system are also constantly increasing, and even require all-weather work in harsh environments. A set of simulators that can simulate the characteristics of radio signal passing through the rain area to produce rain attenuation becomes an indispensable part of the measurement and control system. Indispensable configuration requirements to know in advance how radio signals are affected by rain attenuation and the resulting impact on the system. The rain attenuation occurs in the rainfall area. When the radio wave passes through it, the rain will not only absorb the energy of the electromagnetic wave, but also scatter the radio wave. This combination of absorption and scattering will lead to attenuation ...

AI Technical Summary

Problems solved by technology

[0011] (7) Rain attenuation will cause an increase in the temperature of the received noise

[0015] At present, there is no shelf product on the market that meets the above requirements, which brings a lot of inconvenience to the development and application of the measurement and control system. Therefore, it is necessary to develop a simulation method for the rain attenuation characteristics of radio signals that meets the above requirements to verify that the measurement and control system encounters rainfall. impact on functional indicators in order to prepare countermeasures in advance

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