In tracking operation, the signal reflected from the target comes to the antenna by way of two paths. The first is the direct path, from the target to the antenna, and the second is the indirect path, due to the multipath phenomenon, from the target to the surface then to the antenna. In a low altitude situation, the indirect path can cause severe errors in tracking operation as it enters the antenna main beam and combines with the direct path signal. In such a scenario, the antenna fails to track the elevation angle by the target's image located under the ground. A significant challenge in tracking systems is to mitigate the multipath effect. To do so, we extend the elevation geometric mean method and present the target and image elevation angles separation method. Two monopulse equations are proposed to calculate the target elevation angle. The proposed method offers low computational load and can be implemented on monopulse system. The complete noise analysis is derived for the method. It is shown that the error of the proposed method reaches the Carmer Rao lower bound by proper selection of frequencies. Simulation results show accurate target tracking in a multipath environment.


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    Title :

    Geometric Arithmetic Mean Method for Low Altitude Target Elevation Angle Tracking


    Contributors:


    Publication date :

    2023-10-01


    Size :

    1279530 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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