Advisor(s)

Miriam Leeser

Contributor(s)

Kaushik R. Chowdhury, Scott Bailie

Date of Award

2012

Date Accepted

4-2012

Degree Grantor

Northeastern University

Degree Level

M.S.

Degree Name

Master of Science

Department or Academic Unit

College of Engineering, Department of Electrical and Computer Engineering

Keywords

electrical engineering, cognitive radio, FPGA, software defined radio, spectrum sensing

Disciplines

Electrical and Computer Engineering | Engineering

Abstract

The FPGA is an integral component of a software defined radio (SDR) that provides the needed reconfigurability for dynamically adapting its transceiver and data processing functions. Because of the desire to process data faster and with less latency, researchers are looking at FPGA-based SDR. Our architecture, called CRUSH (Cognitive Radio Universal Software Hardware), is composed of a Xilinx ML605 connected to an Ettus USRP through a custom interface board, allowing flexible data transfer between them. In addition, we provide a framework that supports ease of use, independent programming on both devices, and integration with software running on the host. To demonstrate our platform we implemented spectrum sensing, a key step in determining channel availability before transmission in dynamic spectrum access networks. Spectrum sensing is implemented on CRUSH using FFTs for a 100x speedup; the complete sensing cycles is 10x faster than the same design without CRUSH. By reducing the load on the host and allowing a powerful FPGA extension for off-the-shelf devices, CRUSH enables advances in both protocol design and reconfigurable hardware targeting radio applications.

Document Type

Master's Thesis

Rights Information

copyright 2012

Rights Holder

George Fredric Eichinger III


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