Show simple item record

dc.contributor.authorOtterbacher, Scott E.
dc.date.accessioned2020-10-16T23:33:33Z
dc.date.available2020-10-16T23:33:33Z
dc.date.issued2011-05
dc.identifier.urihttp://hdl.handle.net/11122/11369
dc.descriptionThesis (M.S.) University of Alaska Fairbanks, 2011en_US
dc.description.abstractThe Lockheed Martin PSTAR is a monostatic radar system that provides range, azimuth, and radial velocity information of detected targets. While this system is useful for airspace surveillance in remote locations due to its portability and durability, it lacks the ability to record target information and the ability to estimate target elevation angle, resulting in a vertical arc of possible target locations. Due to a desire to use the PSTAR for applications that require logging three-dimensional target information, a spatial interferometric modification has been implemented. The PSTAR estimates range from pulse propagation delay and azimuth angle from the orientation of the antenna on a rotating pedestal. Two PSTAR antennas were removed from their housings and mounted, vertically separated, in a custom enclosure allowing for the estimation of elevation angle through spatial interferometry. The reflected signal is received by both antennas, mixed to baseband, and then the two pairs of I/Q channels are simultaneously sampled at 1 MS/s. Target elevation angle is estimated by determining the phase difference of the target's reflection received by the two vertically spaced antennas. Range, azimuth, and radial velocity are also estimated. All data collection was implemented in LabVIEW and data post-processing was implemented in MATLAB.en_US
dc.description.tableofcontents1. Introduction -- 1.1. Unmanned aerial vehicles -- 1.2. FAA requirements -- 1.3. PFRR requirements -- 1.4. Thesis overview -- 2. Description of PSTAR -- 2.1. PSTAR hardware -- 2.2. PSTAR testing -- 2.3. Internal PSTAR communications -- 2.4. Beam pattern -- 3. Estimation of target parameters -- 3.1. Radar fundamentals -- 3.1.1. Power -- 3.1.1.1. Radar equation -- 3.1.1.2. Noise -- 3.1.1.3. Signal to noise ratio -- 3.1.2. Azimuth -- 3.1.3. Range -- 3.1.3.1. Range ambiguity -- 3.1.4. Doppler velocity -- 3.1.4.1. Doppler velocity ambiguity -- 3.2. 3D Target location -- 3.2.1. Triangulation -- 3.2.2. Interferometry -- 3.2.2.1. Elevation ambiguity -- 4. Data collection -- 4.1. Azimuth data -- 4.1.1. Digital data from pedestal -- 4.1.2. Resolver -- 4.1.3. Hall effect sensor -- 4.2. I/Q data -- 4.2.1. Analog to digital converter -- 4.2.2. Dual antenna -- 4.2.3. PXI system -- 4.3. Modified PSTAR system -- 4.4. Data collection program -- 4.4.1. North alignment -- 4.4.2. I/Q data -- 4.4.2.1. Calibration data -- 4.4.2.2. Operational data -- 5. Data processing -- 5.1. Overview -- 5.2. Calibration -- 5.3. Signal conditioning -- 5.3.1. Data packaging -- 5.3.2. Removal of voltage discontinuities -- 5.4. Target detection -- 5.4.1. Azimuth -- 5.4.2. Range -- 5.4.2.1. Matched filter -- 5.4.2.2. Moving target indicator -- 5.4.2.3. Oversampled point target detection filter -- 5.4.3. Doppler velocity -- 5.4.4. Elevation angle -- 5.5. Processing demand -- 6. Testing and verification -- 6.1. Simulated data -- 6.2. Cooperative target tests -- 7. Conclusions and future improvements -- 7.1. Unused algorithms -- 7.1.1. Detailed calibration -- 7.1.2. Cluttermap -- 7.2. North alignment -- 7.3. FPGA based data collection -- 7.4. Replace PSTAR components -- Bibliography -- Appendix.en_US
dc.language.isoen_USen_US
dc.subjectmonopulse radaren_US
dc.subjecttarget acquisitionen_US
dc.subjecttracking radaren_US
dc.subjectsurveillance radaren_US
dc.titleInterferometric modification of the Lockheed Martin PSTAR system to facilitate three dimensional airspace surveillanceen_US
dc.typeThesisen_US
dc.type.degreemsen_US
dc.identifier.departmentDepartment of Electrical and Computer Engineeringen_US
refterms.dateFOA2020-10-16T23:33:34Z


Files in this item

Thumbnail
Name:
Otterbacher_S_2011.pdf
Size:
31.56Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record