Test Implementation of an SDR-based Noise-immune Data Transmission Channel

The article describes a test example of practical implementation of the prototype for binary data transmission line over a radio channel using software-defined radio as a technical platform. The main design stages are highlighted and the main functional scheme of the design system are presented. The particular functional layouts of the receiver and transmitter was developed using GNU Radio companion software as specialized digital signal processing platform. The operational analysis of the proposed system prototype was conducted. The direct spread sequence approach is considered as a way to gaining increase in noise immunity level. It was shown that the assumption about the reliability and noise immunity of the implemented radio link remains valid under some conditions. The proposals for further modification and possible improvements of the described system are briefly discussed.