GSM Technology Quiz

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Questions and Answers

What does GSM stand for?

  • Global System for Mobile (correct)
  • Global Society for Mobile
  • General Society for Mobile
  • General System for Mobile

In which year was the GSM standardization group established?

  • 1990
  • 1970
  • 1982 (correct)
  • 1980

What technique does GSM use for transmitting signals?

  • Code Division Multiple Access (CDMA)
  • Time Division Multiple Access (TDMA) (correct)
  • Space Division Multiple Access (SDMA)
  • Frequency Division Multiple Access (FDMA)

Which bands does GSM operate on in most parts of the world?

<p>900 MHz and 1800 MHz (D)</p> Signup and view all the answers

What is the market share of GSM in the world's digital cellular subscribers?

<p>More than 70% (B)</p> Signup and view all the answers

What is the basic teleservice supported by GSM?

<p>Telephony (A)</p> Signup and view all the answers

Which of the following is a data service offered by GSM?

<p>Videotext access (D)</p> Signup and view all the answers

What are HSCSD and GPRS related to in the context of GSM?

<p>Data transfer rates (D)</p> Signup and view all the answers

Which service allows a mobile subscriber to establish a multiparty conversation?

<p>Conferencing (C)</p> Signup and view all the answers

What type of services are caller identification and call forwarding examples of in GSM?

<p>Supplementary services (A)</p> Signup and view all the answers

What is one of the traditional applications of satellites, as mentioned in the text?

<p>Weather forecasting (C)</p> Signup and view all the answers

Which technology competes with cable in many places, as mentioned in the text?

<p>Satellite TV broadcast (C)</p> Signup and view all the answers

What was one of the earliest applications of satellites, as mentioned in the text?

<p>Military communication links (A)</p> Signup and view all the answers

What is the global positioning system (GPS) nowadays well-known and available for everyone used for?

<p>Personal navigation (D)</p> Signup and view all the answers

What benefit do satellites offer for mobile communications, as mentioned in the text?

<p>Global coverage without wiring costs for base stations (D)</p> Signup and view all the answers

What is the equation for the distance of a satellite to the center of the earth in a stable circular orbit?

<p>The distance $r = (g·R^2/(2 ext{π}·f)^2)^{1/3}$ (D)</p> Signup and view all the answers

What is the inclination angle δ?

<p>The angle between the equatorial plane and the plane described by the satellite orbit (A)</p> Signup and view all the answers

At what distance do Geostationary (or geosynchronous) earth orbit (GEO) satellites operate?

<p>Almost 36,000 km (C)</p> Signup and view all the answers

What is the purpose of the elevation angle ε?

<p>To define the area on earth where the signals of the satellite can be received (B)</p> Signup and view all the answers

What is the equation for the centrifugal force Fc trying to pull the satellite away in a stable circular orbit?

<p>$m·r·(ω^2)$ (B)</p> Signup and view all the answers

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