LabVIEW-Based Software-Defined Radio: 4-QAM Modem

• Main Authors: Namjin Kim, Nasser Kehtarnavaz, Murat Torlak
• Format: Article
• Language: English
• Published: International Institute of Informatics and Cybernetics 2006-06-01
• Series: Journal of Systemics, Cybernetics and Informatics
• Subjects: QAM modem; Phase and frequency tracking; Software-defined radio; LabVIEW graphical programming
• Online Access: http://www.iiisci.org/Journal/CV$/sci/pdfs/P675192.pdf

A software-defined radio consists of a programmable communication system where functional changes can be made by merely updating software. In this paper, a software-defined radio 4-QAM (Quadrature Amplitude Modulation) modem system is implemented in LabVIEW. LabVIEW is a widely used graphical programming environment which allows designing systems in an intuitive block-based manner in shorter times as compared to the commonly used text-based programming languages. Basically, this paper demonstrates the ease with which a software-defined radio system can be built and analyzed via the LabVIEW graphical programming environment. Examples are provided to demonstrate the phase and frequency tracking capability of the system.