Digital Communications: Fundamentals and Applications, 2/e (IE-Paperback)

Bernard Sklar

買這商品的人也買了...

商品描述

 

Summary

For courses in Digital Communications.

Exceptionally accessible, this book presents the often “difficult” concepts of digital communications in an easy-to- understand manner—without 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)—providing organization and structure to a field that has, and continues, to grow rapidly, and ensuring that students gain an awareness of the “big 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.        

Table of Contents

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.

商品描述(中文翻譯)

摘要

這本書適用於數位通訊課程。這本書以非常易懂的方式呈現了數位通訊中常常被視為「困難」的概念,同時又不減少數學精確性。使用學生友善的方法,將重要的技術發展在統一的結構中(以區塊圖形式呈現),為這個快速成長的領域提供組織和結構,確保學生在深入細節(最新的調變、編碼和信號處理技術,已成為我們現代時代的基本工具)的同時,也能瞭解到「大局」。它追蹤信號和關鍵處理步驟,從信息源通過發射機、信道、接收機,最終到達信息接收端。

目錄

1. 信號和頻譜。
數位通訊信號處理。信號分類。頻譜密度。自相關。隨機信號。信號通過線性系統的傳輸。數位數據的頻寬。

2. 格式化和基頻調製。
基頻系統。格式化文本數據(字符編碼)。消息、字符和符號。格式化類比信息。損壞源。脈衝編碼調製。均勻和非均勻量化。基頻調製。相關編碼。

3. 基頻解調/檢測。
信號和噪聲。高斯噪聲中的二進制信號檢測。符號間干擾。均衡。

4. 帶通調製和解調/檢測。
為什麼要調製?數位帶通調製技術。高斯噪聲中的信號檢測。相干檢測。非相干檢測。復包絡。二進制系統的錯誤性能。M元信號和性能。M元系統(M>>2)的符號錯誤性能。

5. 通訊鏈路分析。
系統鏈路預算對系統工程師的影響。信道。接收信號功率和噪聲功率。鏈路預算分析。噪聲指數、噪聲溫度和系統溫度。樣本鏈路分析。衛星中繼器。系統權衡。

6. 信道編碼:第一部分。
波形編碼。錯誤控制的類型。結構化序列。線性區塊碼。錯誤檢測和修正能力。標準數組的有用性。循環碼。著名的區塊碼。

7. 信道編碼:第二部分。
卷積編碼。卷積編碼器表示。卷積解碼問題的制定。卷積碼的特性。其他卷積解碼算法。

8. 信道編碼:第三部分。
Reed-Solomon碼。交錯和串聯碼。編碼和交錯應用於緊湊碟數字音頻系統。Turbo碼。

附錄8A. 對數似然比之和。

9. 調製和編碼的權衡。
通訊系統設計師的目標。錯誤概率平面。奈奎斯特最小頻寬。香農-哈特利容量定理。頻寬效率平面。調製和編碼的權衡。定義、設計和評估系統。頻寬效率調製。用於有限頻寬信道的調製和編碼。Trellis-Coded