Research of radio wave propagation in forest based on non-uniform mesh parabolic equation

Non-uniform mesh technology of parabolic equation method is introduced to solve the radio wave propagation problems in forest more efficiently. The simulation errors of radio wave propagation in forest with different uniform grids are analyzed first. The results indicate that fine grid in forest area is necessary to ensure the simulation accuracy. As typical scenes for simulation are usually forest region within a large area, using uniform fine grids requires large computation memory. Hence, the non-uniform mesh technology is employed. The performance of non-uniform mesh technology in the application of local forest scene is analyzed. The result obtained by non-uniform meshes is in good agreement with that obtained by uniform fine grids. Besides, it makes nearly three times reduction of computation time compared with the one with uniform fine grids in this example. This demonstrates that the employment of non-uniform mesh parabolic equation method for forest scenes simulation can improve the computational efficiency greatly.