Title page for ETD etd-08312000-15590002


Type of Document Master's Thesis
Author Davies, John Clay IV
URN etd-08312000-15590002
Title Design and Implementation of an FPGA-based Soft-Radio Receiver Utilizing Adaptive Tracking
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Athanas, Peter M. Committee Chair
Pratt, Timothy J. Committee Member
Reed, Jeffrey Hugh Committee Member
Keywords
  • CDMA
  • Software Radio
  • Adaptive Tracking
  • Adaptive Receiver
  • Configurable Computing
  • FPGA
Date of Defense 2000-08-25
Availability unrestricted
Abstract
The wireless market of the future will demand inexpensive hardware, expandability, interoperability, and the implementation of advanced signal processing functions--i.e. a software radio. Configurable computing machines are often ideal software radio platforms. In particular, the Stallion reconfigurable processor's efficient hardware reuse and scalability fulfill these radios' demands. The advantages of Stallion-based design inspired an FPGA-based software radio - the proto-Stallion receiver. This thesis introduces the proto-Stallion architecture and details its implementation on the SLAAC-1V FPGA platform. Although this thesis presents a specific radio implementation, this architecture is flexible; it can support a variety of applications within its fixed framework. This implemented single-user DS-CDMA receiver utilizes an LMS adaptive filter that can combat MAI and constructively combine multipath; most notably, this receiver employs an adaptive tracking algorithm that harnesses the LMS algorithm to maintain symbol synchronization. The proto-Stallion receiver demonstrates the dependence of adaptive tracking on channel noise; the algorithm requires significant noise levels to maintain synchronization.
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