APPLICATION OF SYNTHETIC INSTRUMENTATION THAT APPLIES THE TREND OF SOFTWARE-BASED APPROACH FOR MEASURING ON THE FIELD OF MODERN WIRELESS TRANSFER SYSTEMS

This paper describes modern software based flexible measuring systems for analysis of digitally modulated systems. The latest methods for evaluation of modulation parameters using new generation test systems based on PXI modular platform and graphical programming in LabVIEW are demonstrated. Authors concentrate on the most widely used modulation technique used in radio communication systems - QPSK. On the real measurement of the QPSK modulation parameters, authors attempt to make the readers acquainted with not very widespread synthetic measuring instruments in the application area of wireless transfer systems. The basic idea of functionality of these instruments comes from the definition of the software radio. Experiments themselves demonstrate the fundamental differences in the conception of traditional and synthetic instrumentation. The focus is mainly on the different understanding of the key component in the form of software and hardware for both investigated platforms.