Application of Parametric Methods for the Synthesis of Directivity Characteristics in Two-Dimensional Antenna Arrays

The paper investigates directivity characteristics of the two-dimensional antenna array (AA) for a passive coherent radar (PCR) constructed using the modified parametric Burg method in the problem of single signal detection. A comparative analysis of the obtained directivity characteristics with the characteristics formed using traditional algorithms based on the discrete Fourier transform (DFT) is carried out. DFT beamforming algorithms are widespread for spatial signal processing in AAs with equidistant arrangement of antenna elements (AEs). However, violation of the AE equidistance, as well as the errors in estimating individual AE coordinates using local positioning systems, negatively affect the AA directivity characteristics and make the DFT algorithms impractical. Directivity characteristics for the comparative analysis were obtained using computer simulation in the MATLAB environment.