rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Fade dynamics modelling for earth-satellite links at Ku-Band in tropical region
  name:
    name part: Dao, Hassan
    role:
      role term: creator
  name:
    name part: International Islamic University Malaysia
    name part: Kulliyyah of Engineering
  genre: Theses, IIUM local
  origin info:
    place:
      place term: my
    place:
      place term: Kuala Lumpur
    publisher: Kulliyyah of Engineering, International Islamic University Malaysia
    date issued: 2013
  language:
    language term: eng
  physical description:
    extent: xxiii, 200 leaves : ill. ; 30cm.
  abstract: Effects of the earth's atmosphere on radio wave propagation are concerned in the design and performance of satellite communication systems. Frequencies above 10 GHz are currently employed in modern satellite systems with higher bandwidth for very large channel capacities requirements. However, the operation of high frequencies is vulnerable to atmosphere and highly sensitive to tropospheric changes. Signal at Ku-band and above is severely attenuated by rain and performance degraded seriously in tropical regions. In order to design and operate a modern satellite system in tropics, suitable rain fade mitigation techniques must be adopted to meet satisfying availability and Quality of Service. The dynamic characteristics of rain fade such as fade slope, fade and interfade durations and scintillation are important parameters to design rain fade mitigation techniques for highly reliable Ku-band services and severe rain fade period. Several prediction models were proposed by ITU-R and other researchers to estimate dynamic characteristics of rain such as fade slope, fade duration, interfade duration and scintillations. All of these were developed based on measurements done in non-tropical regions. Hence it is an urgent need to verify all models and propose more suitable models for tropical region. Characteristics of dynamics behaviour and scintillation are determined and proposed the model based on measurement. One year received signal levels at Ku-band from MEASAT3 were collected concurrently with rain intensity data in Kuala Lumpur, Malaysia. Measured fade slope, fade duration and scintillation are compared with those predicted by available prediction models. Prediction models are unable to fit with measured data for almost all of the cases. Standard deviation of measured fade slope is found nonlinear while it is proposed as linear by ITU-R model for all attenuation levels. A modification of ITU-R fade slope model is proposed for tropics. Short fade duration is less than…
  note: by Hassan Dao
  note: Thesis (Ph.D)--International Islamic University Malaysia, 2013.
  note: Includes bibliographical references (leaves 169-177).
  classification: TK5104
  identifier: http://studentrepo.iium.edu.my/handle/123456789/4821
  record info:
    record content source: UIAM
    record creation date: 131023
    language of cataloging:
      language term: eng