Investigating the use of hopped frequency waveforms for range and velocity measurements of radar targets

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dc.contributor.advisorMishra, Amiten_ZA
dc.contributor.authorKathree, Umuren_ZA
dc.date.accessioned2015-07-02T08:28:24Z
dc.date.available2015-07-02T08:28:24Z
dc.date.issued2014en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractIn the field of radar, High Range Resolution (HRR) profiles are often used to improve tracking accuracy in range and to allow the radar system to produce an image of an object. This work focuses on the use of HRR profiles generated using a sub-class of HRR techniques termed hopped frequency and stepped frequency waveforms. These wideband waveforms are usually synthesised by combining the spectra of the transmitted pulses in the burst [1]. When used with hopped frequency waveforms, this adds the advantage of range-Doppler decoupling and robustness against electronic countermeasures (ECM) [2, 3]. However these waveforms suffer from high levels of sidelobes [4] and improving the spurious free dynamic range (SFDR) of target measurements was required. This was done with the CLEAN technique [5] which could reduce sidelobe levels to below -60 dB and would allow smaller targets masked by the sidelobes to be uncovered. To analyse the practicality of this work, simulated rotating scatterers were used and these techniques could perform adequately for signal to noise ratios (SNR) above -10 dB and signal to clutter ratios (SCR) above 14 dB. Clutter mitigation is to be investigated in future work to make it applicable to lower SCR and sub-clutter visibility.en_ZA
dc.identifier.apacitationKathree, U. (2014). <i>Investigating the use of hopped frequency waveforms for range and velocity measurements of radar targets</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering. Retrieved from http://hdl.handle.net/11427/13266en_ZA
dc.identifier.chicagocitationKathree, Umur. <i>"Investigating the use of hopped frequency waveforms for range and velocity measurements of radar targets."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 2014. http://hdl.handle.net/11427/13266en_ZA
dc.identifier.citationKathree, U. 2014. Investigating the use of hopped frequency waveforms for range and velocity measurements of radar targets. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Kathree, Umur AB - In the field of radar, High Range Resolution (HRR) profiles are often used to improve tracking accuracy in range and to allow the radar system to produce an image of an object. This work focuses on the use of HRR profiles generated using a sub-class of HRR techniques termed hopped frequency and stepped frequency waveforms. These wideband waveforms are usually synthesised by combining the spectra of the transmitted pulses in the burst [1]. When used with hopped frequency waveforms, this adds the advantage of range-Doppler decoupling and robustness against electronic countermeasures (ECM) [2, 3]. However these waveforms suffer from high levels of sidelobes [4] and improving the spurious free dynamic range (SFDR) of target measurements was required. This was done with the CLEAN technique [5] which could reduce sidelobe levels to below -60 dB and would allow smaller targets masked by the sidelobes to be uncovered. To analyse the practicality of this work, simulated rotating scatterers were used and these techniques could perform adequately for signal to noise ratios (SNR) above -10 dB and signal to clutter ratios (SCR) above 14 dB. Clutter mitigation is to be investigated in future work to make it applicable to lower SCR and sub-clutter visibility. DA - 2014 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2014 T1 - Investigating the use of hopped frequency waveforms for range and velocity measurements of radar targets TI - Investigating the use of hopped frequency waveforms for range and velocity measurements of radar targets UR - http://hdl.handle.net/11427/13266 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/13266
dc.identifier.vancouvercitationKathree U. Investigating the use of hopped frequency waveforms for range and velocity measurements of radar targets. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 2014 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/13266en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Electrical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherElectrical Engineeringen_ZA
dc.titleInvestigating the use of hopped frequency waveforms for range and velocity measurements of radar targetsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc(Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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