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도서명

 Digital Communications: Fundamentals and Applications

저자/역자

 Bernard Sklar

출판사

 Prentice Hall

분야

 통신

목차/설명

 Summary

For courses in Digital Communications.

Exceptionally accessible, this book presents the often 밺ifficult?concepts of digital communications in an easy-to- understand manner뾵ithout diluting the mathematical precision. Using a student-friendly approach, it develops the important techniques in the context of a unified structure (in block diagram form)뾭roviding organization and structure to a field that has, and continues, to grow rapidly, and ensuring that students gain an awareness of the 밷ig picture?even while delving into the details (the most up-to-date modulation, coding, and signal processing techniques that have become the basic tools of our modern era). It traces signals and key processing steps from the information source through the transmitter, channel, receiver, and ultimately to the information sink.

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Features

NEW뾇xpanded coverage of error-correction coding뾒articularly in the areas of Reed-Solomon codes, turbo codes, and trellis-coded modulation.
NEW뾅hapter on fading channels뾃nd how to mitigate their degrading effects. Methodically organizes the nomenclature of fading channels, the fading phenomena, and their effects, making them easier to grasp.
Prepares students for disciplines such as mobile communications, which require a basic understanding of how such channels suffer the effects of fading, and how to withstand these degrading effects.
NEW뾇xpanded explanations and descriptions of essential digital communication concepts.
NEW뾇xpanded chapter-end problem sets뾃dds question sets (and where to find the answers), as well as CD exercises.
NEW뾃ccompanying CD뾅ontains the educational version of SystemView software by ELANIX? over 200 additional communications problems (in addition to the ones at the end of each chapter) which can be solved by using the software; and an extensive tutorial on digital signal processing.
Allows students to explore the textbook concepts by viewing waveforms, and changing system parameters in the software to see the effects on the overall system.
Sophisticated concepts presented in an easy-to-understand, intuitive way뾘ses simple numerical examples, including detailed step-by-step 밾ow-to?instructions.
Helps students readily grasp the newest technology, such as turbo codes, trellis-coded modulation, fading channels, Reed- Solomon codes, PGP encryption.
Techniques developed in the context of a unified structure뾗he structure, in block diagram form, appears at the beginning of each chapter; blocks in the diagram are emphasized, when appropriate, to correspond to the subject of that chapter.
Signal transformations뾑rganized according to nine functional classes: Formatting and source coding; Baseband signaling; Bandpass signaling; Equalization; Channel coding; Multiplexing and multiple access; Spreading; Encryption; and Synchronization.
An emphasis on system goals and trade-offs뾇.g., between basic system parameters, such as signal-to-noise ratio, probability of error, and bandwidth (spectral) expenditure.
Turbo codes뾈eatures unique, thorough coverage of turbo code concepts and 밾ow-to?examples.
Gives students insight into the state-of-the-art technique that allows 뱒queezing out the last drop?of performance improvement that is theoretically possible by using advanced error- correction techniques.
Trellis-coded modulation and Reed-Solomon error-correction codes뾉oes beyond simple mathematical description to explain all of the sophisticated math뾵ith analogies of what that math is accomplishing.
Exposes students to subtle, but important ideas뾥ow they work and how they can be used as a vehicle for achieving different system goals.
Pretty Good Privacy (PGP)뾇xplains the key features of how PGP works and how it has evolved.
Familiarizes students to the security program that has become the 밺e facto?standard for e-mail and file encryption.
An abundance of illustrations (500) and problems and exercises (300).

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Table of Contents

(NOTE: Each chapter concludes with a Conclusion, References, Problems, Questions, and CD Exercises.)
1. Signals and Spectra.


Digital Communication Signal Processing. Classification of Signals. Spectral Density. Autocorrelation. Random Signals. Signal Transmission through Linear Systems. Bandwidth of Digital Data.


2. Formatting and Baseband Modulation.

Baseband Systems. Formatting Textual Data (Character Coding). Messages, Characters, and Symbols. Formatting Analog Information. Sources of Corruption. Pulse Code Modulation. Uniform and Nonuniform Quantization. Baseband Modulation. Correlative Coding.


3. Baseband Demodulation/Detection.

Signals and Noise. Detection of Binary Signals in Gaussian Noise. Intersymbol Interference. Equalization.


4. Bandpass Modulation and Demodulation/Detection.

Why Modulate? Digital Bandpass Modulation Techniques. Detection of Signals in Gaussian Noise. Coherent Detection. Noncoherent Detection. Complex Envelope. Error Performance for Binary Systems. M-ary Signaling and Performance. Symbol Error Performance for M-ary Systems (M>>2).


5. Communications Link Analysis.

What the System Link Budget Tells the System Engineer. The Channel. Received Signal Power and Noise Power. Link Budget Analysis. Noise Figure, Noise Temperature, and System Temperature. Sample Link Analysis. Satellite Repeaters. System Trade-Offs.


6. Channel Coding: Part 1.

Waveform Coding. Types of Error Control. Structured Sequences. Linear Block Codes. Error-Detecting and Correcting Capability. Usefulness of the Standard Array. Cyclic Codes. Well-Known Block Codes.


7. Channel Coding: Part 2.

Convolutional Encoding. Convolutional Encoder Representation. Formulation of the Convolutional Decoding Problem. Properties of Convolutional Codes. Other Convolutional Decoding Algorithms.


8. Channel Coding: Part 3.

Reed-Solomon Codes. Interleaving and Concatenated Codes. Coding and Interleaving Applied to the Compact Disc Digital Audio System. Turbo Codes.



Appendix 8A. The Sum of Log-Likelihood Ratios. 9. Modulation and Coding Trade-Offs.


Goals of the Communications System Designer. Error Probability Plane. Nyquist Minimum Bandwidth. Shannon-Hartley Capacity Theorem. Bandwidth Efficiency Plane. Modulation and Coding Trade-Offs. Defining, Designing, and Evaluating Systems. Bandwidth-Efficient Modulations. Modulation and Coding for Bandlimited Channels. Trellis-Coded Modulation.


10. Synchronization.

Introduction. Receiver Synchronization. Network Synchronization.


11. Multiplexing and Multiple Access.

Allocation of the Communications Resource. Multiple Access Communications System and Architecture. Access Algorithms. Multiple Access Techniques Employed with INTELSAT. Multiple Access Techniques for Local Area Networks.


12. Spread-Spectrum Techniques.

Spread-Spectrum Overview. Pseudonoise Sequences. Direct-Sequence Spread-Spectrum Systems. Frequency Hopping Systems. Synchronization. Jamming Considerations. Commercial Applications. Cellular Systems.


13. Source Coding.

Sources. Amplitude Quantizing. Differential Pulse-Code Modulation. Adaptive Prediction. Block Coding. Transform Coding. Source Coding for Digital Data. Examples of Source Coding.


14. Encryption and Decryption.

Models, Goals, and Early Cipher Systems. The Secrecy of a Cipher System. Practical Security. Stream Encryption. Public Key Cryptosystems. Pretty Good Privacy.


15. Fading Channels.

The Challenge of Communicating over Fading Channels. Characterizing Mobile-Radio Propagation. Signal Time-Spreading. Time Variance of the Channel Caused by Motion. Mitigating the Degradation Effects of Fading. Summary of the Key Parameters Characterizing Fading Channels. Applications: Mitigating the Effects of Frequency-Selective Fading.


A. A Review of Fourier Techniques.

Signals, Spectra, and Linear Systems. Fourier Techniques for Linear System Analysis. Fourier Transform Properties. Useful Functions. Convolution. Tables of Fourier Transforms and Operations.


B. Fundamentals of Statistical Decision Theory.

Bayes Theorem. Decision Theory. Signal Detection Example.


C. Response of a Correlator To White Noise.
D. Often-Used Identities.
E. s-Domain, z-Domain and Digital Filtering.
F. List of Symbols.
G. SystemView by ELANIX Guide to the CD.

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