Answered: A TDMA network of five earth stations…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A TDMA network of five earth stations shares a single transponder equally. The frame duration is 2.0 ms, the overhead time per station is 20 μs, and guard bands of 5 μs are used between bursts. Transmission bursts are QPSK at 30 Msps. Calculate the number of 256 kbps channels that each TDMA earth station can transmit, assuming that each channel is encoded with rate ¾ FEC coding. What is the efficiency of the TDMA system expressed as Efficiency = 100% × Number of channels in a frame/ Maximum number of channels that could be sent in the frame The maximum number of channels that could be sent is when the transmission is a continuous stream of data bits with no time lost in overhead or guard times. If the frame length is increased to 20 ms, what is the new TDMA system efficiency?

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