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1. Introduction
2. Necessity of Error Correction
3. FEC Selection
4. FEC in Intel® Stratix® 10 H-Tile Devices
5. FEC in Intel® Stratix® 10 E-Tile Devices
6. FEC Implementation Using the E-Tile Channel Placement Tool
7. FEC in Practical Application
8. Hardware Results
9. Document Revision History for AN 846: Intel® Stratix® 10 Forward Error Correction
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5.4. FEC Decoders
Decoder Type | Description |
---|---|
Hard decision FEC | Makes exact decisions of 1s or 0s. Good gain versus complexity. Broadly used in most applications. 10GBASE-KR/KR4/KP4 are all examples of hard decision FECs. Used in Intel® Stratix® 10 TX devices. |
Soft decision FEC | Makes decisions based on probabilities of a 1 or 0. Provides higher gain and allows you to get closer to the Shannon limit. Complex design used in higher end optical transport networking (OTN) systems, specifically coherent systems. Normally used in cellular communications using the Viterbi algorithm. |