Sol16 - CHAPTER 16 Cellular Telephone and Satellite...

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1 CHAPTER 16 Cellular Telephone and Satellite Networks Solutions to Review Questions and Exercises Review Questions 1. A mobile switching center coordinates communications between a base station and a telephone central office . 2. A mobile switching center connects cells, records call information, and is respon- sible for billing. 3. A high reuse factor is better because the cells that use the same set of frequencies are farther apart (separated by more cells). 4. In a hard handoff , a mobile station communicates with only one base station. In a soft handoff , a mobile station communicates with two base stations at the same time. 5. AMPS is an analog cellular phone system using FDMA. 6. D-AMPS is a digital cellular phone system that is backward compatible with AMPS. 7. GSM is a European standard that provides a common second-generation technol- ogy for all of Europe. 8. CDMA encodes each traffic channel using one of the rows in the Walsh-64 table. 9. The three orbit types are equatorial , inclined , and polar . 10. A GEO satellite has an equatorial orbit since the satellite needs to remain fixed at a certain spot above the earth. 11. A footprint is the area on earth at which the satellite aims its signal. 12. A satellite orbiting in a Van Allen belt would be destroyed by the charged parti- cles. Therefore, satellites need to orbit either above or below these belts. 13.
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This homework help was uploaded on 04/18/2008 for the course JAVA CDA 4506 taught by Professor Eisler during the Spring '08 term at University of Central Florida.

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Sol16 - CHAPTER 16 Cellular Telephone and Satellite...

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