Maximum Length Sequences for Radar and Synchronization

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• Publisher: Cuvillier Verlag
• Year: 2016
• Print ISBN: 9783736991927
• eBook ISBN: 9783736981928
• Edition: 1

This dissertation demonstrates the implementation of ultra-wideband (UWB) radar sensors using commercial off-the-shelf electronics. The sensors are based on the correlation of binary pseudo noise sequences (M-sequences), combining low transmit power requirements with excellent noise and interference suppression. A ranging system is introduced that is able to track moving objects with a standard deviation of 1.73mm at 2m range. Subsequently, a system is developed which can synchronize itself to a reference sequence with 1.96ps RMS jitter. This synchronization system uses an analog correlating control loop (delay lock loop) to achieve tracking of the reference to 0.38% of one chip.The final application shown is a ground penetrating radar (GPR). The system is comprised of three elements: an FPGA, an output driver for the transmitter and a commercial analog-to-digital converter. Comparative measurements on buried pipes and cables prove that this system has achieved detection capability comparable to commercially available pulsed GPRs.

Table of contents

• Kurzfassung
• Abstract
• Contents
• Acronyms
• Introduction
• Noise Modulated Radar
• M-Sequence Generation
• Distance Measurement
• Synchronization System
• Ground Penetrating Radar
• Conclusions and Future Work
• Bibliography