О.V. Saltykov

The present work is devoted to the calculation of the directional diagram (DD) formed during digital processing by adaptive algorithm of interference, called in English literature Generalized Side-lobe Canceler (GSC). For this algorithm the direction of the desired signal arrival with unknown directions of interference is assumed to be known. Suppressor scheme consists of two branches - the principal one and supplementary one. The main branch implements the so-called scheme of simple beamforming (Conventional Beamforming). In additional branch passage of the desired signal is suppressed and a weighted sum of the signals of this branch and weighted coefficients that minimize the interference level at the output of the algorithm are formed. Its output represents the difference between the principal and supplementary branches. The example of a scheme implementation under recurrent procedure of correlation matrix of additional branch signals is given. This algorithm structure does not allow to calculate the directional diagram, formed by the scheme due to its characteristics. The article gives the example of the described algorithm structure to the weighted sum of the scheme, in which weighted coefficients depend on the characteristics and the coefficients of the original scheme. According to weighted coefficients the appropriate directional diagram calculation is performed. In this work we propose a scheme to apply the weighted sum of the adaptive algorithm for organization of a beamforming method, in which there are two units involved in this process: 1) execution unit, which produces a weighted sum of signals of antenna elements, 2) a computer unit, forming a weighted sum coefficients as described according to the methods, described in the article. Executive unit in the scheme can be both digital and analog. In conclusion we give an example of a beamforming process simulation modeling, based on the proposed method.