Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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1. Why are guard bands used in FDM?
2. Distinguish between the two basic multiplexing techniques (FDM and TDM) using
appropriate diagrams.
3. Assume that a voice channel occupies a bandwidth of 8 kHz. We need to multiplex 20
voice channels with guard bands of 500 Hz using FDM. Calculate the required bandwidth.
4. Why is statistical TDM more efficient than a synchronous TDM multiplexer? Why is the
synchronization bit required in TDM?1.
1
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Transcribed Image Text:1. Why are guard bands used in FDM? 2. Distinguish between the two basic multiplexing techniques (FDM and TDM) using appropriate diagrams. 3. Assume that a voice channel occupies a bandwidth of 8 kHz. We need to multiplex 20 voice channels with guard bands of 500 Hz using FDM. Calculate the required bandwidth. 4. Why is statistical TDM more efficient than a synchronous TDM multiplexer? Why is the synchronization bit required in TDM?1. 1
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