Dissertation > Excellent graduate degree dissertation topics show

A Study on the Synthetic Aperture Sonar

Author: QianGang
Tutor: LiZhiShun
School: Northwestern Polytechnical University
Course: Signal and Information Processing
Keywords: sonar synthetic aperture maneuvering target parameter estimation WVD XWVD CWD imaging algorithm
CLC: U666.7
Type: Master's thesis
Year: 2003
Downloads: 364
Quote: 8
Read: Download Dissertation


Synthetic array sonar includes both synthetic aperture sonar (SAS) and inverse synthetic aperture sonar (ISAS). It is a novel kind of underwater imaging sonar. It is an important research field in underwater high technology and has a widely applying prospect. The very strong property of the synthetic array sonar is the ability to acquire a high azimuth resolution from a physically small array.The thesis reviews the theory that is the basis of synthetic aperture processing. Then the components of synthetic aperture sonar and parameter selecting are studied. Time-frequency analysis is introduced. After the model of maneuvering target is established, a new signal detection and estimation algorithm is introduced, which is based on the Radon-XWVD transform. The experiment validates that the performance of this new method can detect signal with very low SNR. Aimed on multi-target situation, utilizing the idea of eliminating one by one, the problem that the weak signal is covered up by robust signal cross term is resolved.The thesis also studies the theory of inverse synthetic aperture sonar imaging. Since the target moves irregularly, the Doppler effect of each scatter and the imaging projection change with time. The concept and algorithm of Range-Instantaneous Doppler imaging, based on WCWD, is presented. This algorithm is effective to the maneuvering target. At last the complexity and presupposition of the algorithm is discussed. The simulations concerned are also presented.

Related Dissertations

  1. Maneuver Detection and Tracking with the Radar Rate Measurement,TN953
  2. The Research on Ship Imaging Algorithm under the Sea Clutter Background,TN958
  3. The Maneuvering Target Tracking Research Based on VRPF,TN957.52
  4. Modeling of Sea Clutter and Effect of Sea Clutter on Isar Imaging,TN957.54
  5. ISAR Imaging Simulation of Space Targets and Target Recognition Based on ISAR Images,TN957.52
  6. Research on Multi-Sensor Embattling and Continious Tracking Technique Applying for Anti-Stealth and Anti-Interference,TN953
  7. Signal Acquisition and Processing Platform Design and Implementation of Trawl Sonar System,S951.2
  8. Application of the Fractional Fourier Transform to ISAR Maneuvering Target Imaging,TN957.52
  9. Research on Subimage Selection and Mathching Method for Synthetic Aperture Radar(SAR) Target Recognition,TN957.52
  10. The Theoretical and Experimental Research on MIMO Detection for Small Target in Waveguide,TB566
  11. The Theoretical and Experimental Research on the Collocated MIMO Detection,TB566
  12. Research on the Near-field Imaging of Millimeter-wave Synthetic Aperture Radiometer,TN015
  13. Multi-sensor multi-target tracking and fusion algorithms track,TN953
  14. Multi-band synthetic radar imaging technology,TN957.51
  15. Synthetic aperture radar ground experiment system software design,TN958
  16. Airborne synthetic aperture radar signal simulation,TN958
  17. Two kinds of wideband radar SAR imaging method and test applications,TN958
  18. Wideband radar data acquisition and real-time image processing technology research,TN958
  19. Stepped frequency SAR super-resolution imaging technology,TN957.52
  20. Study of Through-the-Wall Imaging Based on Stepped-Frequency-Continuous-Wave Radar,TN957.52
  21. Research on the Pre-processing Methods for Vehicle Target Classification in SAR Images,TN957.52

CLC: > Transportation > Waterway transport > Marine Engineering > Navigation equipment, acoustic equipment > Acoustic equipment
© 2012 www.DissertationTopic.Net  Mobile