SDR study stand

Abstract

SDR study stand

Abdulmanov Sh.R., Danilaev D.P., Khayrullin A.N., Khairullin N.G.

Incoming article date: 11.05.2020

Soft Defined Radio (SDR) or a software-configurable receiver is the most promising direction for the development of modern radio receivers. Therefore, the study of the principles of its construction should be given special attention in the training of radio engineers. However, since most of the operations for processing and converting the received signal are carried out in software, including in signal processors, the construction of a laboratory layout that is easy to understand raises questions. In this paper, for the greatest coverage of all the processes of processing and converting the received signal, it is proposed that the laboratory model be implemented on the basis of the superheterodyne receiver model with double frequency conversion with a nonzero intermediate frequency. The result is the ability to study the impact of software settings and the adjustment of the parameters of individual structural elements of the circuit (model), as well as the types of individual elements.

Keywords: Soft Defined Radio, band-pass filter, SDR receiver, two-position coding, time constant, amplitude-to-digital converter, BPSK, bandwidth