14. A satellite allocates a frequency band from 900 MHz to 960 MHz for transmission of digitized audio signals. Multiple audio signals, each made up of 2 stereo channels with a highest frequency of (N+4) kHz, must be sampled at 1.5x the minimum alias-free rate and digitized with 9-bit accuracy. The resulting PCM signals must then be combined by TDM and transmitted from the satellite using QAM modulation of a single carrier. (a) What bit rate is required for a single audio signal? (b) If minimum-bandwidth pulses are used to carry the data, what is the maximum symbol rate allowed by the allocated bandwidth? (c) If 16-QAM format is used, what is the maximum bit rate that can be transmitted? (d) If 16-QAM format is used, what is the largest number of audio signals that can be supported? (e) If noise is found to create excessive bit errors, choose a format other than 16-QAM that should do better, and find the largest number of audio signals that can be sent with your chosen format.

14. A satellite allocates a frequency band from 900 MHz to 960 MHz for transmission of digitized audio signals. Multiple audio signals, each made up of 2 stereo channels with a highest frequency of (N+4) kHz, must be sampled at 1.5x the minimum alias-free rate and digitized with 9-bit accuracy. The resulting PCM signals must then be combined by TDM and transmitted from the satellite using QAM modulation of a single carrier. (a) What bit rate is required for a single audio signal? (b) If minimum-bandwidth pulses are used to carry the data, what is the maximum symbol rate allowed by the allocated bandwidth? (c) If 16-QAM format is used, what is the maximum bit rate that can be transmitted? (d) If 16-QAM format is used, what is the largest number of audio signals that can be supported? (e) If noise is found to create excessive bit errors, choose a format other than 16-QAM that should do better, and find the largest number of audio signals that can be sent with your chosen format.

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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