The Research of Digital Antenna Arrays with Directive Radiators for Interference and Noise Cancellation in Azimuth and Elevation

摘要

In the paper the problem of applying the digital antenna arrays (DAA) equipped with the directional radiators is considered simultaneously on azimuth and elevation planes. The method MUSIC of direction-of-arrival (DOA) estimation is researched depending on the shape of the antenna array and the directivity of an individual element. The half-dodecahedron, planar and cylindrical antenna arrays are considered. As it is well known along with DOA-estimation as the first step the beamforming is highly needed at the final stage of the digital arrays functionality. The optimal algorithm of maximizing the ratio of the useful signal to interference + noise (SNIR) is researched in the tasks of the radiation pattern formation simultaneously on azimuth and elevation planes. The estimations of the signal to noise and interference ratio as well as bit error rate (BER) are obtained depending on the directivity of the emitters. The research has established that the shape of the radiation pattern of elements has a significant impact on both the accuracy of bearings and placing the main lobe and zeros. The curves are provided showing the optimal performance of DAA on azimuth and elevation planes.