Samarah, Ashraf: A novel approach for generating digital chirp signals using FPGA technology for synthetic aperture radar applications. 2012
Inhalt
- Dedication
- Acknowledgments
- Table of Contents
- List of Figures
- List of Tables
- Dissertation Abstract
- Kurzfassung
- Abbreviations and Symbols
- Introduction
- Chirp Signals
- State of the Art Methods for Generating Digital Chirp Signals
- Pedersen’s Chirp Generator
- Mathematical Description of the Chirp Generator
- Derivations of the parameters for the digital chirp generator
- Bit number requirements of components
- Digital Chirp Generator based on the fractional bits technique
- Direct Digital Frequency Synthesizer
- Introduction
- The traditional DDFS
- A demonstration for the functionality of DDFS
- Practical considerations for DDFS
- ROM Compression Techniques
- Problem Definition and Introduction to the Solution
- A novel and Improved Digital Chirp Generator
- Introduction
- The Proposed Architecture of the Digital Chirp Signal Generator
- Quadrant Compression Technique Using the Piecewise Parabolic Interpolation
- The derivation of the used interpolants in the proposed digital chirp generator
- Spurious Free Dynamic Range (SFDR)
- Harmonics Calculation
- Implementation and Simulation Results of the proposed chirp generator
- Hardware Implementation of the Proposed System
- Introduction
- Features of the used Platform
- X5-TX Platform
- DAC5682Z (Digital-to-Analog Converter)
- The Used FPGA
- Software and the used blocksets in the HDL language
- Programming the FPGA on the platform X5-TX to generate the chirp signal
- A parallel processing technique and overcoming the limited speed’s problem of the FPGA
- Conclusions and Contributions
- Appendix
- Bibliography