Refined Signal Model of Meter Wave Radar for Height Measurement Under Complex Terrain

Meter wave radar height measurement is one of the most difficult problems in meter wave radar system. At present, the most popular height measurement methods of meter wave radar include beam splitting method, MUSIC algorithm and maximum likelihood estimation method, which can achieve good performance under flat ground. However, the real ground is not ideal condition, and the situation of undulating ground is also very much. Under this condition, the performance of the above algorithm decreases a lot. It is an effective way to solve the problem using enhance the robustness of ground mismatch. However, the authors think that the key to solve the problem is to establish a refined height measurement signal model. In this paper, the accurate model of reflection coefficient, reflection height and reflection point under the condition of undulating ground is established to provide accurate signal model for meter wave height measurement.