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access icon free Research and verification for an improved two-way parabolic equation method in obstacle environment

© The Institution of Engineering and Technology
Received 07/05/2017, Accepted 23/09/2017, Revised 27/08/2017, Published 01/11/2017

An improved two-way parabolic equation (2WPE) method for predicting radio wave propagation in obstacle environment is proposed. Classical 2WPE is mainly utilised for calculating radio propagation under irregular terrain by taking the undulating ground and obstacles as a whole, which yields calculation precision is very limited by the terrain inclination. In order to address the above problems, according to the principle of domain decomposition, by dividing the obstacles and the ground into different zones, 2WPE can be improved to calculate the fields in obstacle environment. With the improved 2WPE, the real phases of both the forward and backward waves can be retrieved when a radio wave entering and leaving the obstacles, and the total field can be obtained by superposition of forward and backward waves. After that, method of moments (MoM) is applied to verify the accuracy of the improved 2WPE in the short distance. In the simulation, the equivalent source model is used to unify the initial field or source settings of 2WPE and MoM to improve the verification precision. The accuracy and superiority of the improved 2WPE are proved, which lays a foundation for the analysis of radio wave propagation in the more complex environment.

Inspec keywords: radiowave propagation; parabolic equations; decomposition

Other keywords: terrain inclination; MoM; method of moment; improved two-way parabolic equation method; domain decomposition; improved 2WPE method; radiowave propagation prediction; equivalent source model; undulating ground; obstacle environment

Subjects: Radiowave propagation; Mathematical analysis

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