Accession Number : ADA632269


Title :   Range Sidelobe Response from the Use of Polyphase Signals in Spotlight Synthetic Aperture Radar


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Lang, Danny M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a632269.pdf


Report Date : Dec 2015


Pagination or Media Count : 115


Abstract : This thesis investigated five specific phase-shift keyed (PSK) modulated signals for usage in Spotlight Synthetic Aperture Radars (SAR) and the effects each of the individual PSK signals sidelobe structure has on SAR imagery. The specific PSK codes studied were the Frank code, P1 code, P2 code, P3 code and P4 code. A mathematical approach was used to define SAR limitations from signal parameters, and simulations were used to investigate an individual signal parameter s effects on the sidelobe structure in SAR images. Simulations were used to generate spatially diverse targets, collect each target s unique echo and apply cross-correlation match filtering and pulse integration to detect each returned echo from the targeted area. Results show the P1 and Frank codes to be the most promising based on the selected parameter presented in this thesis. The P4 code may be better given additional processing to remove range ambiguities, enhancing its unambiguous range.


Descriptors :   *SYNTHETIC APERTURE RADAR , AUTOCORRELATION , CONTINUOUS WAVE RADAR , ECHOES , FOURIER ANALYSIS , MATHEMATICAL FILTERS , PHASE SHIFT KEYERS , PULSE INTEGRATORS , RADAR CROSS SECTIONS , RADAR IMAGES , RADIO SIGNALS , SIDELOBES , SIGNAL PROCESSING , SIGNAL TO NOISE RATIO , SIMULATION , TARGET DETECTION , THESES


Subject Categories : Active & Passive Radar Detection & Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE