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mid10f - CNT 4104-85726 Introduction to Data Communications...

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1 CNT 4104-85726: Introduction to Data Communications Fall 2010 Name: ______________________________ Midterm Last 5 digits of ZN : Zxxx __ __ __ __ __ This is a CLOSED books/notes test. You are NOT allowed to consult any material you have brought into the classroom. NO exchange of information is allowed among students. Write your name and Z# on each sheet detached. 1. A communication system uses the telephone network as its medium. If a sampling rate of 8000 samples per second is used to generate PCM signals, then for SNR = 30 dB, a. What is the number of uniform quantization levels required? Show work. (6 pts.) b. What will be the data rate? Show work. (6 pts.) 2. What is the channel capacity for a printer channel with a 3K Hz bandwidth and a signal-to- noise ratio of 5 dB? Show work. (12 pts.)
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2 3. Four data sources are multiplexed using TDM. Each source produces 2000 characters per second. Assume byte interleaving with 1 bit per frame for synchronization. a.
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This note was uploaded on 07/13/2011 for the course CNT 4104 taught by Professor Staff during the Fall '10 term at FAU.

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mid10f - CNT 4104-85726 Introduction to Data Communications...

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