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Satellite Communication problems

  • 1. The maximum signal propagation time of a geosynchronous satellite transmission is about __________ millisecond.

  • Options
  • A. 540
  • B. 270
  • C. 135
  • D. 1080
    • Discuss
  • 2. The different access methods which permit many satellite users to operate in parallel through a single transponder without interfering with each other as

  • Options
  • A. Frequency Division Multiple Access (FDMA)
  • B. Time Division Multiple Access (TDMA)
  • C. Code Division Multiple Access (CDMA)
  • D. All of the above
    • Discuss
  • 3. In envelope detection of an AM waveform

  • Options
  • A. One side band and full-ampiitude carrier are needed
  • B. Both side bands and full-amplitude carrier are needed
  • C. Only two side bands are needed
  • D. Upper side band and part of carrier are needed
    • Discuss
  • 4. Which of the following statement regarding link loss for a satellite is wrong?

  • Options
  • A. For fixed antenna, it is inversely proportional to f2
  • B. For fixed frequency, it is inversely proportional to the product of the antenna aperture areas
  • C. For a given satellite operating at a given frequency, it is inversely proportional to
  • D. Loss in down-link is negligible as compared to that in uplink
    • Discuss
  • 5. The echo heard by a telephone user on a satellite channel can be removed by using

  • Options
  • A. a vocoder
  • B. a multiplexer
  • C. echo suppressor
  • D. digital techniques
    • Discuss
  • 6. The distance of a synchronous satellite from Earth's surface is __________ km.

  • Options
  • A. 300
  • B. 10000
  • C. 35900
  • D. 5
    • Discuss
  • 7. A typical signal strength received from a geosynchronous communication satellite is of the order of a few

  • Options
  • A. milliwatts
  • B. kilowatts
  • C. picowatts
  • D. watts
    • Discuss
  • 8. The degradation of satellite solar cells with time is mainly due to

  • Options
  • A. their bombardment by electrons
  • B. collection of meteoric dust
  • C. increase in resistivity of silicon
  • D. gradual leakage of charge carriers from the semiconductor material
    • Discuss
  • 9. The life time of a geosynchronous communication

  • Options
  • A. 5
  • B. 10
  • C. 20
  • D. 50
    • Discuss
  • 10. Shannon's Law relates

  • Options
  • A. antenna gain to frequency
  • B. noise power to bandwidth
  • C. information-carrying capacity to S/N ratio
  • D. transmission losses to noise
    • Discuss

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