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Local Multipoint Distribution System (LMDS)
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Table of Contents:
Definition and Overview
1. LMDS Overview
2. Architectural Options
3. Wireless Links and Access Options
4. Modulation
5. System Capacity
6. Microwave Propagation Issues
7. Network Planning
8. Network-Node Equipment
9. Radio Frequency Equipment
10. Network Interface Equipment (Customer Premises)
11. Network Management
Self-Test
Glossary
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Self-Test
1. LMDS is an acronym for which of the following?
a. linked multipoint digital service
b. local multipoint distribution service
c. low-speed multiple data streams
d. local multimedia distribution service
2. In which of the following bands does LMDS in the United States not operate?
a. 27.5–28.35 GHz
b. 29.1–29.25 GHz
c. 31.075–31.225 GHz
d. 40.5–42.5 GHz
3. Which of the following is used to estimate the distance that a subscriber can be located from a cell while still achieving acceptable service reliability?
a. cell-size selection
b. link budget
c. capital-cost model
d. cell design
4. Network-node products provide which of the following?
a. multiplexing and demultiplexing
b. encoding and decoding
c. modulation and demodulation
d. all of the above
5. The radio-modem module of the NIU supports which of the following?
a. 4, 16, and 64–QAM
b. FDMA
c. TDMA
d. all of the above
6. When calculating the data rates for LMDS, capacity is the number of cell sites within the system multiplied by which of the following?
a. the capacity per cell site
b. the number of cells
c. the number of sectors in the cell site
d. the sector capacity
7. Which of the following is not included in LMDS network management?
a. fault management
b. configuration management
c. Accounting management
d. tower management
8. LMDS optimizes frequency reuse by doing which of the following?
a. minimizing multipathing
b. cross polarization
c. sectoring the distribution system
d. all of the above
9. The choice of antennas used within an LMDS network is based on which of the following?
a. desired subscriber coverage
b. terrain and interfering objects
c. antenna azimuth pattern, elevation patter, and gain
d. all of the above
Glossary >>

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