Title page for etd-0705114-133055


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URN etd-0705114-133055
Author Ji-tsuen Lo
Author's Email Address No Public.
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Department IAMPUT
Year 2013
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Measurement and Observation of underwater acoustic channel impulse response in the North-Eastern sea of Taiwan
Date of Defense 2014-04-10
Page Count 82
Keyword
  • eigenray
  • BELLHOP
  • underwater channel impulse response
  • Doppler effect
  • multipath effect
  • towing source
  • Abstract Underwater acoustic communications are affected by multipath effects which cause inter-symbol interference and result in symbol errors. And if mobile sources or receivers are applied in underwater acoustic communications, the carrier frequency will be fluctuated because of the Doppler effect, which will induce errors in demodulation results. Furthermore, underwater communication performance will be also influenced by the signal to noise ratio which is related to the acoustic propagation characteristics in underwater waveguide. This research use the bottom mounted hydrophone on the MArine Cable Hosted Observatory (MACHO) system, administrated by the Central Weather Bureau, and a mobile source to study the multipath effects, the Doppler effects, and the variation of signal to noise ratio in horizontal communications. The temporal and spatial variations of channel impulse response are studied, and the topographic effects are discussed. Finally, numerical simulation is applied to illustrate the multipath characteristics and to examine the predictability of acoustic field in this waveguide.
    Advisory Committee
  • Chau-Chang Wang - chair
  • Andrea Y.Y. Chang - co-chair
  • Ruey-Chang Wei - co-chair
  • Linus Y.S. Chiu - advisor
  • Files
  • etd-0705114-133055.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2014-08-19

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