Chapter 4 / 4.18 / 4.18.1

4.18.1 What Is Channel Coding And Why Is It Needed?

Explore why communication systems need channel coding and how adding carefully structured redundancy protects information from noise, interference, fading, and other impairments. Learn the difference between source coding and channel coding and why modern communications systems depend on error-control coding.

1. What Is Channel Coding?
2. Why Do Communication Channels Introduce Errors?
3. What Types of Errors Occur in Communication Systems?
4. Why Can't We Simply Increase Signal Power?
5. What Is Redundancy?
6. Why Is Redundancy Necessary?
7. Isn't Redundancy Removed by Source Coding?
8. How Does Channel Coding Work?
9. What Is Error Detection?
10. What Is Error Correction?
11. What Is Forward Error Correction?
12. How Much Redundancy Is Required?
13. What Is Code Rate?
14. Why Is Channel Coding So Important?
15. What Is Coding Gain?
16. Where Is Channel Coding Used?
17. What Are the Limitations of Channel Coding?
18. How Does Channel Coding Relate to Shannon's Work?
19. Why Is Channel Coding Fundamental to Modern Communications?

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