The implementation of smart antenna based on NI PXI

摘要

This article describes development of the multibeam receiving antenna array with digital beamforming (DBF) prototype using National Instruments modular instruments of PXI standard. Development of the prototype and researching its characteristics is a continuation of earlier research carried out by National Research University of Electronic Technology. Some problems associated with DBF were examined using the array prototype. The first iteration of the research included amplitude and phase calibration and its influence on antenna radiation pattern. The next iteration included test of radiation pattern formation with its minimum in the direction of electromagnetic interference using adaptive algorithms. In practice antenna array prototype with digital beamforming has shown the possibility of using the digital beamforming technology for signals spatial filtering and detection. In the result of the research software that implements the necessary algorithms for digital signal processing was developed and required computing capacity was estimated.