Type of Document Dissertation Author Recio, Adolfo Leon Author's Email Address email@example.com URN etd-12202010-142616 Title Spectrum-Aware Orthogonal Frequency Division Multiplexing Degree PhD Department Electrical and Computer Engineering Advisory Committee
Advisor Name Title Athanas, Peter M. Committee Chair Buehrer, Richard Michael Committee Member de Sturler, Eric Committee Member Martin, Thomas L. Committee Member Patterson, Cameron D. Committee Member Keywords
- Overlay Systems
- Cognitive Radio
- Spectrum Awareness
- Filter Bank Multi-carrier
- Dynamic Spectrum Access
- Configurable Computing
Date of Defense 2010-12-15 Availability unrestricted AbstractReconfigurable computing architectures are well suited for the dynamic data flow processing requirements of software-defined radio. The software radio concept has quickly evolved to include spectrum sensing, awareness, and cognitive algorithms for machine learning resulting in the cognitive radio model.
This work explores the application of reconfigurable hardware to the physical layer of cognitive radios using non-contiguous multi-carrier radio techniques. The practical tasks of spectrum sensing, frame detection, synchronization, channel estimation, and mutual interference mitigation are challenges in the communications and the computing fields that are addressed to optimally utilize the capacity of opportunistically allocated spectrum bands.
FPGA implementations of parameterizable OFDM and filter bank multi-carrier (FBMC) radio prototypes with spectrum awareness and non-contiguous sub-carrier allocation were completed and tested over-the-air. Sub-carrier sparseness assumptions were validated under practical implementation and performance considerations. A novel algorithm for frame detection and synchronization with mutual interference rejection applicable to the FBMC case was proposed and tested.
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