The Architecture Of Software Defined Radios

2185 Words Jun 1st, 2016 9 Pages
2.1 ARCHITECTURE OF SOFTWARE-DEFINED RADIOS
As Reed (Reed, 2002) and others have stressed out, that the benefits of SDR approach go way beyond the multimode operations. Other benefits stem from the flexibility that comes with programmability. For instance, it can simplify design by allowing reuse of a common RF front end with new designs or modes of operation available through software changes. It also enables improvements to radio performance and functionality through application of digital signal processing (DSP) to implement adaptive beamforming, interference mitigation, and numerous other techniques either proven or in development. As the SDR approach has gained traction, a variety of hardware and software tools for development and exploration have become available. These tools are broadly accessible with reasonable cost and ease-of-use enabling new opportunities for engineering education and research. Examples include National Instruments (NI) universal software radio peripheral (USRP)/ NI LabVIEW software , the Ettus Research USRP/ GNU’s Not Unix (GNU) Radio, WARP , the Lyrtech SDR Platform and the IMEC SDR Platform. For researchers, these platforms can provide a starting point for development of prototypes operating on live signals. Such prototypes can effectively demonstrate the practical viability of an implementation and are a step toward end deployment.

2.2 THE NEED FOR SDR

The SDR offers a wide range of economic and deployment benefits which has attracted many…
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