Digital Communications

(DIGI-COMM.AP1) / ISBN : 978-1-64459-592-3
This course includes
Lessons
TestPrep
Lab
AI Tutor (Add-on)
Get A Free Trial

About This Course

Skills You’ll Get

Get the support you need. Enroll in our Instructor-Led Course.

Lessons

25+ Lessons |

TestPrep

1

Introduction

  • Organization of the Course
  • Additional Course Resources
2

Signals and Spectra

  • Digital Communication Signal Processing
  • Classification of Signals
  • Spectral Density
  • Autocorrelation
  • Random Signals
  • Signal Transmission Through Linear Systems
  • Bandwidth of Digital Data
  • Conclusion
  • References
  • Problems
  • Questions
3

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 Transmission
  • Correlative Coding
  • Conclusion
  • References
  • Problems
  • Questions
4

Baseband Demodulation/Detection

  • Signals and Noise
  • Detection of Binary Signals in Gaussian Noise
  • Intersymbol Interference
  • Equalization
  • Conclusion
  • References
  • Problems
  • Questions
5

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)
  • Conclusion
  • References
  • Problems
  • Questions
6

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
  • Conclusion
  • References
  • Problems
  • Questions
7

Channel Coding: Waveform Codes and Block Codes

  • Waveform Coding and Structured Sequences
  • Types of Error Control
  • Structured Sequences
  • Linear Block Codes
  • Error-Detecting and Error-Correcting Capability
  • Usefulness of the Standard Array
  • Cyclic Codes
  • Well-Known Block Codes
  • Conclusion
  • References
  • Problems
  • Questions
8

Channel Coding: Convolutional Codes and Reed–Solomon Codes

  • Convolutional Encoding
  • Convolutional Encoder Representation
  • Formulation of the Convolutional Decoding Problem
  • Properties of Convolutional Codes
  • Other Convolutional Decoding Algorithms
  • Reed–Solomon Codes
  • Interleaving and Concatenated Codes
  • Coding and Interleaving Applied to the Compact Disc Digital Audio System
  • Conclusion
  • References
  • Problems
  • Questions
9

Channel Coding: Turbo Codes and Low-Density Parity Check (LDPC) Codes

  • Turbo Codes
  • Low-Density Parity Check (LDPC) Codes
  • Appendix 8A: The Sum of Log-Likelihood Ratios
  • Appendix 8B: Using Bayes’ Theorem to Simplify the Bit Conditional Probability
  • Appendix 8C: Probability that a Binary Sequence Contains an Even Number of Ones
  • Appendix 8D: Simplified Expression for the Hyper...e Natural Log of a Ratio of Binary Probabilities
  • Appendix 8E: Proof that 𝛟(x) = 𝛟–1(x)
  • Appendix 8F: Bit Probability Initialization
  • References
  • Problems
  • Questions
10

Modulation and Coding Trade-Offs

  • Goals of the Communication System Designer
  • Error-Probability Plane
  • Nyquist Minimum Bandwidth
  • Shannon–Hartley Capacity Theorem
  • Bandwidth-Efficiency Plane
  • Modulation and Coding Trade-Offs
  • Defining, Designing, and Evaluating Digital Communication Systems
  • Bandwidth-Efficient Modulation
  • Trellis-Coded Modulation
  • Conclusion
  • References
  • Problems
  • Questions
11

Synchronization

  • Receiver Synchronization
  • Synchronous Demodulation
  • Loop Filters, Control Circuits, and Acquisition
  • Phase-Locked Loop Timing Recovery
  • Frequency Recovery Using a Frequency-Locked Loop (FLL)
  • Effects of Phase and Frequency Offsets
  • Conclusion
  • References
  • Problems
  • Questions
12

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
  • Conclusion
  • References
  • Problems
  • Questions
13

Spread-Spectrum Techniques

  • Spread-Spectrum Overview
  • Pseudonoise Sequences
  • Direct-Sequence Spread-Spectrum Systems
  • Frequency-Hopping Systems
  • Synchronization
  • Jamming Considerations
  • Commercial Applications
  • Cellular Systems
  • Conclusion
  • References
  • Problems
  • Questions
14

Source Coding

  • Sources
  • Amplitude Quantizing
  • Pulse Code Modulation
  • Adaptive Prediction
  • Block Coding
  • Transform Coding
  • Source Coding for Digital Data
  • Examples of Source Coding
  • Conclusion
  • References
  • Problems
  • Questions
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
  • Conclusion
  • References
  • Problems
  • Questions
16

The ABCs of OFDM (Orthogonal Frequency-Division Multiplexing)

  • What Is OFDM?
  • Why OFDM?
  • Getting Started with OFDM
  • Our Wish List (Preference for Flat Fading and Slow Fading)
  • Conventional Multi-Channel FDM versus Multi-Channel OFDM
  • The History of the Cyclic Prefix (CP)
  • OFDM System Block Diagram
  • Zooming in on the IDFT
  • An Example of OFDM Waveform Synthesis
  • Summarizing OFDM Waveform Synthesis
  • Data Constellation Points Distributed over the Subcarrier Indexes
  • Hermitian Symmetry
  • How Many Subcarriers Are Needed?
  • The Importance of the Cyclic Prefix (CP) in OFDM
  • An Early OFDM Application: Wi-Fi Standard 802.11a
  • Cyclic Prefix (CP) and Tone Spacing
  • Long-Term Evolution (LTE) Use of OFDM
  • Drawbacks of OFDM
  • Single-Carrier OFDM (SC-OFDM) for Improved PAPR Over Standard OFDM
  • Conclusion
  • References
  • Problems
  • Questions
17

The Magic of MIMO (Multiple Input/Multiple Output)

  • What is MIMO?
  • Various Benefits of Multiple Antennas
  • Spatial Multiplexing
  • Capacity Performance
  • Transmitter Channel-State Information (CSI)
  • Space-Time Coding
  • MIMO Trade-Offs
  • Multi-User MIMO (MU-MIMO)
  • Conclusion
  • References
  • Problems
  • Questions
18

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
  • Conclusion
  • References
  • Problems
  • Questions

Appendix 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
  • sampled data fourier transform

Appendix B: Fundamentals of Statistical Decision Theory

  • Bayes’ Theorem
  • Decision Theory
  • Signal Detection Example

Appendix C: Response of Correlators to White Noise

Appendix D: Often-Used Identities

Appendix E: s-Domain, z-Domain, and Digital Filtering

  • The Laplace Transform
  • The z-transform
  • Digital Filtering
  • Finite Impulse Response Filter Design
  • Infinite Impulse Response Filter Design

Appendix F: OFDM Symbol Formation with an N-Point Inverse Discrete Fourier Transform (IDFT)

Appendix G: List of Symbols

Related Courses

All Course
scroll to top