Stepped-carrier OFDM-radar processing scheme to retrieve high resolution range-velocity profile at low sampling rate
Wissenschaftlicher Artikel
Authors
Schweizer, Benedikt
Knill, Christina
Schindler, Daniel
Waldschmidt, Christian
Faculties
Fakultät für Ingenieurwissenschaften, Informatik und PsychologieInstitutions
Institut für MikrowellentechnikExternal cooperations
Bosch-Zentrum für Forschung und Vorausentwicklung, Robert Bosch GmbHBosch center for research and advance engineering, Robert Bosch GmbH
Published in
Transactions on Microwave Theory and Techniques ; 66 (2018), 3. - S. 1610-1618. - ISSN 0018-9480. - eISSN 1557-9670
Link to original publication
https://dx.doi.org/10.1109/TMTT.2017.2751463Peer review
ja
Document version
acceptedVersion
Abstract
Recent publications show that the potential of using orthogonal frequency division multiplexing waveforms is radar signals. Since the range resolution is proportional to the RF bandwidth, the major obstacle that obstructs the practical use in automotive and other low-cost radars is the requirement to sample the received signal at sampling rates that span the whole RF signal bandwidth requiring ADCs with sampling rates in the order of GHz. This paper presents a method to achieve the high range resolution induced by a large RF bandwidth, but with a much lower baseband bandwidth, consequently requiring a much slower ADC while at the same time delivering a velocity profile for each subcarrier. In addition, the processing scheme induces a range migration compensation, independent of the number of targets. This is achieved with barely increased computational effort. The scheme is verified with simulations and measurements at 77 GHz.
Subject Headings
OFDM [GND]Bandbreite <Elektrotechnik> [GND]
Carrier [GND]
Radar [GND]
Doppler-Effekt [GND]
Orthogonal frequency division multiplexing [LCSH]
Radio frequency [LCSH]
Radar [LCSH]
Doppler effect [LCSH]
Keywords
Bandwidth; Frequency modulation; Frequency-domain analysis; Automotive radar; High range resolution; Range migration; Stepped-carrier; Stepped-frequency; Processing scheme; Velocity compensationDewey Decimal Group
DDC 620 / Engineering & allied operationsMetadata
Show full item recordCitation example
Schweizer, Benedikt et al. (2018): Stepped-carrier OFDM-radar processing scheme to retrieve high resolution range-velocity profile at low sampling rate. Open Access Repositorium der Universität Ulm. http://dx.doi.org/10.18725/OPARU-6198
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