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You searched for +publisher:"NSYSU" +contributor:("Shun-Hsiung Chang"). Showing records 1 – 2 of 2 total matches.

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NSYSU

1. Sung, Chen-Hung. The Study of Synthetic Aperture Sonar System.

Degree: Master, IAMPUT, 2010, NSYSU

This research is to study the fundamental theory of Synthetic Aperture Sonar (SAS) through numerical simulation and experimental analysis. The basic principle of SAS is to enhance the capability of spatial resolution by moving the transducer element to increase aperture so that it achieves a better resolution. The factors affecting the capability of resolution include the actual size of the transducers, frequency and its bandwidth, pulse length, and moving speeds. The effects of various factors on the resolution were examined through numerical simulation. The results have shown that the smaller the true size of the transducer, the better the resolution. Moreover, when the bandwidth is increased, the resolution also increases. The SAS is sensitive to the speed of movement due to the fact that data acquisition may be limited, therefore the speed can not be too high, e.g., less than 1.5 m/s. The experiment was carried out in a water tank of size 4 m x 3.5 m x 2 m. The transducers of AST MK VI 192 kHz were employed to transmit and receive signals. Copper spheres of various sizes (3 cm, 6 cm, 8 cm diameter) were used as targets. The data were obtained and analyzed, and the results have shown that the resolution may be achieved by SAS analysis, establishing the fundamental principle and offering opportunity for future study. Advisors/Committee Members: Chen-Fen Huang (chair), Jin-Yuan Liu (committee member), Shun-Hsiung Chang (chair), Chau-Chang Wang (chair).

Subjects/Keywords: target detection; image reconstruction; synthetic aperture sonar

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Sung, C. (2010). The Study of Synthetic Aperture Sonar System. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0831110-150211

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Sung, Chen-Hung. “The Study of Synthetic Aperture Sonar System.” 2010. Thesis, NSYSU. Accessed October 21, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0831110-150211.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Sung, Chen-Hung. “The Study of Synthetic Aperture Sonar System.” 2010. Web. 21 Oct 2019.

Vancouver:

Sung C. The Study of Synthetic Aperture Sonar System. [Internet] [Thesis]. NSYSU; 2010. [cited 2019 Oct 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0831110-150211.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sung C. The Study of Synthetic Aperture Sonar System. [Thesis]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0831110-150211

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


NSYSU

2. Guo, Chin-lin. The Application of Dopplergram on Underwater Intruder Detection in a Harbor Environment.

Degree: Master, IAMPUT, 2010, NSYSU

The purpose of this study is to undertake the analysis of underwater detection and tracking using the Doppler phase-shift effects to enhance the detection capability. The fundamental principle is owing to the fact that the M-sequence may result in a better distinction to the echo returning from a moving target than the traditional LFM signal, in that the matched filter using M-sequence may need to estimate and compensate the doppler shift due to the moving target. The experiments were carried out in two harbors: True Love Pier of Kaohsiung Harbor (TLPKH) and Woods Hole Hrabor (WHH). The TLPKH is an inner harbor, with sediment being mud, while the WHH is an open types, suitable for target detection. The results from WHH experiment has shown that when the results from M-sequence and traditional LFM signal were compared, the M-sequence yields much better capability both in detection and estimation of the speed of the moving target along the beam axis. However, the signals from TLPKH were too weak for analysis, therefore, the data from TLPKH were used to analyze the environmental noise, transmission loss, which were combined with estimated values for sonar parameters to conduct the sonar performance analysis in an harborenvironment. Advisors/Committee Members: Shun-hsiung Chang (chair), Jin-yuan Liu (committee member), Chen-fen Huang (chair).

Subjects/Keywords: Reverberation; Doppler processing; LFM signal; M sequencen code; Match filiter

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Guo, C. (2010). The Application of Dopplergram on Underwater Intruder Detection in a Harbor Environment. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0831110-134321

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Guo, Chin-lin. “The Application of Dopplergram on Underwater Intruder Detection in a Harbor Environment.” 2010. Thesis, NSYSU. Accessed October 21, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0831110-134321.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Guo, Chin-lin. “The Application of Dopplergram on Underwater Intruder Detection in a Harbor Environment.” 2010. Web. 21 Oct 2019.

Vancouver:

Guo C. The Application of Dopplergram on Underwater Intruder Detection in a Harbor Environment. [Internet] [Thesis]. NSYSU; 2010. [cited 2019 Oct 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0831110-134321.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Guo C. The Application of Dopplergram on Underwater Intruder Detection in a Harbor Environment. [Thesis]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0831110-134321

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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