Target Detection Using Optimal Load Matching and Interference Nulling

Abstract

Spatial processing of signals is taking into account the mutual influence of the antenna array elements. The change in the antenna array matrix of the mutual impedances leads to a mismatch between the load impedances and the output impedances of the antenna array elements. As a result, the output signal-to-interference ratio can be increased by optimizing the load impedances. The optimization problem is solved. Optimal load impedances are derived depending on the signal-to-interference situation. Calculations was carried for elements in the form of thin vibrators and for more general case by the scaling method. The gain from optimal matching in comparison with the load actions in the absence of mutual influence is calculated, as well as in the case of applying non-optimal mutual impedances, when the mutual influence is present