Modern Digital and Analog Communication Systems

by Lathi, B. P.

• ISBN13: 9780195110098
• ISBN10: 0195110099
• Edition: 3rd
• Format: Hardcover
• Copyright: 1998-03-26
• Publisher: Oxford University Press

Summary

Lathi's trademark user-friendly and highly readable text presents a complete and modern treatment of communication systems. It begins by introducing students to the basics of communication systems without using probabilistic theory. Only after a solid knowledge base--an understanding of howcommunication systems work--has been built are concepts requiring probability theory covered. This third edition has been thoroughly updated and revised to include expanded coverage of digital communications. New topics discussed include spread-spectrum systems, cellular communication systems,global positioning systems (GPS), and an entire chapter on emerging digital technologies (such as SONET, ISDN, BISDN, ATM, and video compression). Ideal for the first communication systems course for electrical engineers, Modern Digital and Analog Communication Systems offers students a superb pedagogical style; it consistently does an excellent job of explaining difficult concepts clearly, using prose as well as mathematics. The authormakes every effort to give intuitive insights--rather than just proofs--as well as heuristic explanations of theoretical results wherever possible. Featuring lucid explanations, well-chosen examples clarifying abstract mathematical results, and excellent illustrations, this unique text is highlyinformative and easily accessible to students.

Table of Contents

PREFACE	xi
1 INTRODUCTION	1	(13)
Communication System	1	(2)
Analog and Digital Messages	3	(5)
Signal-to-Noise Ratio, Channel Bandwidth, and the Rate of Communication	8	(2)
Modulation	10	(2)
Randomness, Redundancy, and Coding	12	(2)
2 INTRODUCTION TO SIGNALS	14	(57)
2.1 Size of a Signal	14	(6)
2.2 Classification of Signals	20	(4)
2.3 Some Useful Signal Operations	24	(4)
2.4 Unit Impulse Function	28	(2)
2.5 Signals and Vectors	30	(5)
2.6 Signal Comparison: Correlation	35	(5)
2.7 Signal Representation by Orthogonal Signal Set	40	(4)
2.8 Trigonometric Fourier Series	44	(9)
2.9 Exponential Fourier Series	53	(7)
2.10 Numerical Computation of D(n)	60	(11)
3 ANALYSIS AND TRANSMISSION OF SIGNALS	71	(80)
3.1 Aperiodic Signal Representation by Fourier Integral	71	(7)
3.2 Transforms of Some Useful Functions	78	(6)
3.3 Some Properties of the Fourier Transform	84	(17)
3.4 Signal Transmission through a Linear System	101	(5)
3.5 Ideal and Practical Filters	106	(4)
3.6 Signal Distortion over a Communication Channel	110	(5)
3.7 Signal Energy and Energy Spectral Density	115	(8)
3.8 Signal Power and Power Spectral Density	123	(7)
3.9 Numerical Computation of Fourier Transform: The DFT	130	(21)
4 AMPLITUDE (LINEAR) MODULATION	151	(57)
4.1 Baseband and Carrier Communication	151	(1)
4.2 Amplitude Modulation: Double Sideband (DSB)	152	(10)
4.3 Amplitude Modulation (AM)	162	(8)
4.4 Quadrature Amplitude Modulation (QAM)	170	(1)
4.5 Amplitude Modulation: Single Sideband (SSB)	171	(8)
4.6 Amplitude Modulation: Vestigial Sideband (VSB)	179	(4)
4.7 Carrier Acquisition	183	(6)
4.8 Superheterodyne AM Receiver	189	(2)
4.9 Television	191	(17)
5 ANGLE (EXPONENTIAL) MODULATION	208	(43)
5.1 Concept of Instantaneous Frequency	208	(7)
5.2 Bandwidth of Angle-Modulated Waves	215	(14)
5.3 Generation of FM Waves	229	(4)
5.4 Demodulation of FM	233	(8)
5.5 Interference in Angle-Modulated Systems	241	(4)
5.6 FM Receiver	245	(6)
6 SAMPLING AND PULSE CODE MODULATION	251	(43)
6.1 Sampling Theorem	251	(11)
6.2 Pulse-Code Modulation (PCM)	262	(16)
6.3 Differential Pulse Code Modulation (DPCM)	278	(3)
6.4 Delta Modulation	281	(13)
7 PRINCIPLES OF DIGITAL DATA TRANSMISSION	294	(60)
7.1 A Digital Communication System	294	(3)
7.2 Line Coding	297	(13)
7.3 Pulse Shaping	310	(9)
7.4 Scrambling	319	(3)
7.5 Regenerative Repeater	322	(7)
7.6 Detection-Error Probability	329	(5)
7.7 M-ary Communication	334	(3)
7.8 Digital Carrier Systems	337	(5)
7.9 Digital Multiplexing	342	(12)
8 EMERGING DIGITAL COMMUNICATIONS TECHNOLOGIES	354	(50)
8.1 The North American Hierarchy	354	(14)
8.2 Digital Services	368	(9)
8.3 Broadband Digital Communication: SONET	377	(6)
8.4 Digital Switching Technologies	383	(9)
8.5 Broadband Services for Entertainment and Home Office Applications	392	(3)
8.6 Video Compression	395	(5)
8.7 High-Definition Television (HDTV)	400	(4)
9 SOME RECENT DEVELOPMENTS AND MISCELLANEOUS TOPICS	404	(30)
9.1 Cellular Telephone (Mobile Radio) System	404	(2)
9.2 Spread Spectrum Systems	406	(10)
9.3 Transmission Media	416	(11)
9.4 Hybrid Circuit: 2-Wire to 4-Wire Conversions	427	(3)
9.5 Public Switched Telephone Network	430	(4)
10 INTRODUCTION TO THEORY OF PROBABILITY	434	(53)
10.1 Concept of Probability	434	(11)
10.2 Random Variables	445	(18)
10.3 Statistical Averages (Means)	463	(9)
10.4 Central-Limit Theorem	472	(1)
10.5 Correlation	473	(3)
10.6 Linear Mean Square Estimation	476	(11)
11 RANDOM PROCESSES	487	(45)
11.1 From Random Variable to Random Process	487	(9)
11.2 Power Spectral Density of a Random Process	496	(13)
11.3 Multiple Random Processes	509	(1)
11.4 Transmission of Random Processes through Linear Systems	510	(4)
11.5 Bandpass Random Processes	514	(8)
11.6 Optimum Filtering: Wiener-Hopf Filter	522	(10)
12 BEHAVIOR OF ANALOG SYSTEMS IN THE PRESENCE OF NOISE	532	(45)
12.1 Baseband Systems	532	(2)
12.2 Amplitude-Modulated Systems	534	(7)
12.3 Angle-Modulated Systems	541	(16)
12.4 Pulse-Modulated Systems	557	(10)
12.5 Optimum Preemphasis-Deemphasis Systems	567	(10)
13 BEHAVIOR OF DIGITAL COMMUNICATION SYSTEMS IN THE PRESENCE OF NOISE	577	(49)
13.1 Optimum Threshold Detection	577	(5)
13.2 General Analysis: Optimum Binary Receiver	582	(8)
13.3 Carrier Systems: ASK, FSK, PSK, and DPSK	590	(11)
13.4 Performance of Spread Spectrum Systems	601	(7)
13.5 M-ary Communication	608	(14)
13.6 Synchronization	622	(4)
14 OPTIMUM SIGNAL DETECTION	626	(53)
14.1 Geometrical Representation of Signals: Signal Space	626	(6)
14.2 Gaussian Random Process	632	(5)
14.3 Optimum Receiver	637	(25)
14.4 Equivalent Signal Sets	662	(7)
14.5 Nonwhite (Colored) Channel Noise	669	(1)
14.6 Other Useful Performance Criteria	670	(9)
15 INTRODUCTION TO INFORMATION THEORY	679	(49)
15.1 Measure of Information	679	(5)
15.2 Source Encoding	684	(6)
15.3 Error-Free Communication over a Noisy Channel	690	(3)
15.4 Channel Capacity of a Discrete Memoriless Channel	693	(8)
15.5 Channel Capacity of a Continuous Channel	701	(16)
15.6 Practical Communication Systems in Light of Shannon's Equation	717	(11)
16 ERROR CORRECTING CODES	728	(36)
16.1 Introduction	728	(3)
16.2 Linear Block Codes	731	(6)
16.3 Cyclic Codes	737	(8)
16.4 Burst-Error Detecting and Correcting Codes	745	(1)
16.5 Interlaced Codes for Burst- and Random-Error Correction	746	(1)
16.6 Convolutional Codes	747	(8)
16.7 Comparison of Coded and Uncoded Systems	755	(9)
APPENDIXES	764	(11)
A. Orthogonality of Some Signal Sets	764	(2)
B. Schwarz Inequality	766	(2)
C. Gram-Schmidt Orthogonalization of a Vector Set	768	(3)
D. Miscellaneous	771	(4)
INDEX	775