Solutions Manual - Smart Devices, Robots & Communications Roman Ku...

Solutions Manual Electrical Engineering in Context Smart Devices, Robots & Communications Roman Kuc For 1 / 4

Contents 1Introduction1 1.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2Sensors & Actuators9 2.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3Electric Circuits21 3.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4Electronics39 4.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 4.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 5Combinatorial Logic Circuits49 5.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 5.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 6Sequential Logic Circuits61 6.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 6.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 7Converting Between Analog & Digital Signals69 7.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 7.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 8Digital Signal Processing87 8.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 8.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 9Spectral Analysis107 9.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 9.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 iii© 2015 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to  a  publicly accessible website, in  whole or in  part. 2 / 4

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CONTENTS

10Detecting Data Signals in Noise119 10.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 10.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 11Designing Signals for Multiple-Access Systems133 11.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 11.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 12Source Coding145 12.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 12.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 13Channel Coding167 13.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 13.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 14Symbology179 14.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 14.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 15Data Networks191 15.1 Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191 15.2 Matlab Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195© 2015 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to  a  publicly accessible website, in  whole or in  part. 3 / 4

Chapter 1 Introduction 1.1 Problems Problem 1.1 (Illuminated mouse)You often power your laptop with the battery while you are trav- eling. You need to buy a new mouse, but want to maximize the battery life. Explain why buying the illuminated mouse is not a wise choice.(ans: An illuminated mouse contains an LED light source that requires power, which is supplied by the battery. Hence, battery life will be decreased with an illuminated mouse.) Problem 1.2 (Threshold detection)Digital signals that occur within your computer are designed to

be either 0 V or 5 V. Additive noise produced the following detected values:

−0.1,3.9,0.9,5.1,0.7,4.85

What threshold value would you use to restore the values? Explain why. Restore these detected values to their designed values.(ans: The ideal threshold is mid-way between the two voltage extremes. Hence, with [0,5V], a 2.5V threshold does not favor either 0V or 5V signals. Restored values are

0,5,0,5,0,5

) Problem 1.3 (Error correction)Threshold detection converted signal values 0 V and 5 V into binary logic values 1 and 0. For transmission over a noisy channel, each binary value is transmitted five times.

A threshold detector produces the following binary sequence:

00100 11001 01000 10110 10001

• Assuming at most 2 errors occur per 5-bit code word, estimate the probability of error in the

channel as the number of errors in the sequence divided by the number of data bits transmissions.1© 2015 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to  a  publicly accessible website, in  whole or in  part.

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