Matched Spatiotemporal Filtering of Broadband Signals in the Presence of Active Interference in Systems with Digital Antenna Arrays

Abstract

We consider a mathematical description of signals and interference in broadband radio systems with digital linear and planar antenna arrays. The use of the models of spatiotemporal signals is discussed. The similarity of mathematical models of signals and external active noise interference, which have been filtered in the input amplifiers of receiving devices, is studied. Multidimensional Fourier transforms leading to multidimensional spatiotemporal spectra are considered. Their localization at certain frequencies, depending on the angular direction to the radiation source is shown. With allowance for the above said, to suppress active interference, it is proposed to use multidimensional spatiotemporal matched filtering. An example of the matched filtering of an impulse signal with linear frequency modulation at a plane antenna array is proposed.