Stepped-carrier OFDM-radar processing scheme to retrieve high resolution range-velocity profile at low sampling rate
FacultiesFakultät für Ingenieurwissenschaften, Informatik und Psychologie
InstitutionsInstitut für Mikrowellentechnik
External cooperationsBosch-Zentrum für Forschung und Vorausentwicklung, Robert Bosch GmbH
Bosch center for research and advance engineering, Robert Bosch GmbH
Transactions on Microwave Theory and Techniques ; 66 (2018), 3. - S. 1610-1618. - ISSN 0018-9480. - eISSN 1557-9670
Link to original publicationhttps://dx.doi.org/10.1109/TMTT.2017.2751463
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 HeadingsOFDM [GND]
Bandbreite <Elektrotechnik> [GND]
Orthogonal frequency division multiplexing [LCSH]
Radio frequency [LCSH]
Doppler effect [LCSH]
KeywordsBandwidth; Frequency modulation; Frequency-domain analysis; Automotive radar; High range resolution; Range migration; Stepped-carrier; Stepped-frequency; Processing scheme; Velocity compensation
Dewey Decimal GroupDDC 620 / Engineering & allied operations
MetadataShow full item record
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