Wireless

Wireless Networking Research

Non-Contiguous OFDM

Spectrogram using Non-Contiguous OFDM

Wireless networks provide data networking for more people than any other network technology. At Colorado, we’re focused on technologies that allow software defined cognitive radios to enhance spectrum use. Our research focuses on prototypes, technical mechanisms and analysis. We’ve developed a series of prototype systems based on FPGA’s for signal processing. We have developed a sophisticated software stack that lets us easily manipulate an OFDM waveform for real-time, high-bandwidth application.Earlier systems used devies from Nallatech and Fidelity Comtech. We’ve also done substantial work towards investigating the efficacy of directional and phased-array antenna technology in optimizing wireless networks and adhoc unmanned aerial networks, have developed more robust and realistic simulation techniques, and have done some work towards investigating coverage mapping strategies for large area wireless networks.

Active Projects

Hardware & Systems

  • NallaTech/Fidelity Comtech Software Defined Radio
  • GENI Cognitive Radio
  • Directional Antenna Radio

Recent Publications

  • Eric Anderson, Caleb Phillips, Douglas Sicker, and Dirk Grunwald. Signal Quality Pricing: Decomposition for Spectrum Scheduling and System Configuration. IEEE Dynamic Spectrum Access Networks 2011 (DySPAN2011). Aachen, Germany. May 3-6, 2011.
  • Aveek Dutta, Dola Saha, Dirk Grunwald, Douglas Sicker, SMACK – A SMart ACKnowledgment Scheme for Broadcast Messages in Wireless Networks,  ACM SIGCOMM, Barcelona, Spain, August 2009
  • Eric Anderson, Caleb Phillips, Douglas Sicker, and Dirk Grunwald. Modeling Environmental Effects on Directionality. Mathematical and Computer Modeling Journal. Special Issue on Modeling and Simulation of Wireless Networks. June, 2010. Elsevier.
  • Caleb Phillips, Douglas Sicker, and Dirk Grunwald. Bounding the Practical Error of Path Loss Models in Urban Environments. IEEE Dynamic Spectrum Access Networks 2011 (DySPAN 2011). Aachen, Germany. May 3-6, 2011.