Coherent networks of uncoupled digital radars
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Date
2025-04-16
Authors
Werbunat, David
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Dissertation
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Abstract
In a radar network, multiple radars operate cooperatively, enabling simultaneous sensing from multiple perspectives. This collaboration is particularly valuable when the radars are coherent—enabling bistatic signal processing, where one radar evaluates the signal from one or multiple others, without being affected by synchronization errors. The greatest flexibility is provided by uncoupled coherent radar networks, which do not rely on reference signals distributed via cables. Nonetheless, these networks are also the most challenging to synchronize. Digital radars, however, offer promising opportunities for new synchronization and multiplexing techniques: By exploiting their highly flexible digital baseband signal generation and processing capabilities, signal processing limitations of conventional analog radars can be overcome.
This thesis presents a comprehensive investigation into the potential of digital radars to overcome the key challenges of uncoupled coherent radar networks. Specifically, these are synchronization and multiplexing. To this end, three different radar network concepts are proposed, verified, and evaluated, leveraging different characteristics of the respective signal modulation. These include the use of single-carrier signals, as employed by phase-modulated continuous wave (PMCW) radars and multi-carrier signals as used by orthogonal frequency-division multiplexing (OFDM) radars.
Description
Faculties
Fakultät für Ingenieurwissenschaften, Informatik und Psychologie
Institutions
Institut für Mikrowellentechnik
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DFG Project uulm
EU Project THU
Other projects THU
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CC BY-NC-ND 4.0 International
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DOI external
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DFG Project THU
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Keywords
Radar network, Digital radar, Coherency, PMCW, DoA estimation, Direction-of-arrival, Repeater, Automotive, Direction of arrival (DoA), Carrier recovery, Timing recovery, Angle estimation, Bistatic, Multistatic, Syntonization, Radar, OFDM, Orthogonal frequency division multiplexing, Continuous wave radar, Synchronization, DDC 620 / Engineering & allied operations