AN 846: Intel® Stratix® 10 Forward Error Correction

ID 683805
Date 7/02/2018
Public
Document Table of Contents

5.2. 100GBASE-KR4

The 100GBASE-KR4 specification is defined in Clauses 74 and 91 of IEEE802.3bj.

100GBASE-KR4 is a non-binary code (528, 514, 7, 10). 100GBASE-KR4 features:

  • 514 data symbols per codeword
  • 528 data plus parity symbols per codeword
  • Codeword size = 10 * 528 = 5280 bits
  • Correcting capability up to seven symbols within a codeword
  • 5 to 5.5 dB gain
  • NRZ modulation
  • 25.78125 Gbps bit rate
  • BER of 10-12 or better (after FEC correction)
Figure 16. 100GBASE-KR4 OSI Model