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Maximum Length Sequences for Radar and Synchronization

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Maximum Length Sequences for Radar and Synchronization

Sebastian Brückner (Author)

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ISBN-13 (Hard Copy) 9783736991927
ISBN-13 (eBook) 9783736981928
Language English
Page Number 158
Lamination of Cover matt
Edition 1.
Publication Place Göttingen
Place of Dissertation Braunschweig
Publication Date 2016-01-29
General Categorization Dissertation
Departments Electrical engineering
Telecommunications and communications engineering
Keywords ground penetrating radar, delay lock loop, synchronization, m-sequence, prbs
Description

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.