This paper discusses the utilization of a relatively inexpensive wideband radio receiver in combination with a digital downconverter (DDC) based data recorder to capture and record real world radio signals. The resulting in-phase (I) and quadrature (Q) data files are then imported intoMATLAB for processing. This batch processing of real world radio signals allows for a tremendous amount of classroom flexibility in the discussion of software defined radio topics.
Welch, Thad B.; Kent, Travis; Wright, Cameron H.G.; and Morrow, Michael G.. (2009). "An Affordable Software Defined Radio". IEEE 13th Digital Signal Processing Workshop and 5th IEEE Signal Processing Education Workshop, 791-796. http://dx.doi.org/10.1109/DSP.2009.4786029