Error Detection and Correction (EDAC) §

Error detection and correction (EDAC) or error control are techniques that enable reliable delivery of digital data over unreliable communication channels.

There are many error detection schemes:

• Error Correction Code
• Checksum
• Cyclic Redundancy Check

Before we dive into HARQ, we need to understand Error Detection and Correction.

There are three Major types of Error Correction:

• Automatic Repeat Request
• Forward Error Correction
• HARQ