GNU Radio is a free and open-source simulation software that provides signal processing blocks to simulate communication systems. It can be used with readily-available low-cost external RF hardware to create software defined radios, or without hardware in a simulation-like environment. It is used to support both wireless communications research and real-world radio systems. For this paper, GNU Radio has been used to simulate a trans-receive chain of a communication system for Combat Platform Identification System to minimize the incidence of fratricide among friendly forces during war. Also, comparative study of the effect of Additive White Gaussian Noise (AWGN) on DBPSK, DQPSK and GMSK modulation techniques have been carried out.
T. Bose, Sasidaran K., Dr. Dhanesh G. Kurup, and B. B. Jha, “Simulation of a Combat Platform Identification System and Comparative Study of Digital Modulation Techniques using GNU Radio and Python”, International Journal of Advanced Research in Computer and Communication Engineering , vol. 3, no. 5, 2014.