Modeling and analysis of tropospheric scattering communication channel based on parabolic equation method

In order to analyze the influence of environmental on the performance of tropospheric scattering communication in practical application scenarios, a model of tropospheric scattering channel is established by using parabolic equation method and atmospheric turbulence model. Tropospheric scattering transmission loss and signal fast fading distribution are calculated, and the calculated results are in agreement with ITU model and theoretical fast fading distribution curve. On this basis, the bit error rate of the scattering channel under QPSK modulation is derived, and the electromagnetic modeling and simulation calculation of the scattering communication link under the actual propagation scenario are carried out, and the influence of different meteorological factors on the bit error rate is analyzed. The simulation results show that when the communication distance is long, the signal obeys Rayleigh distribution, and the environment has little influence on the bit error rate. As the communication distance becomes closer, the signal power from a scatterer path will be enhanced, and the signal may appear rice distribution. At this time, the bit error rate will fluctuate greatly with the change of environmental factors. When the communication distance is the same, the turbulent activity is strong in the high temperature and humid climate, and the radio transmission loss is small, which can achieve a better communication effect.