LDPC Codes for Optical Channels: Is the “FEC Limit” a Good Predictor of Post-FEC BER?

Alex Alvarado; Erik Agrell; Erik Agrell; Domaniç Lavery; Polina Bayvel

doi:10.1364/OFC.2015.Th3E.5

Optical Fiber Communication Conference
OSA Technical Digest (online) (Optica Publishing Group, 2015),
paper Th3E.5
•https://doi.org/10.1364/OFC.2015.Th3E.5

LDPC Codes for Optical Channels: Is the “FEC Limit” a Good Predictor of Post-FEC BER?

Alex Alvarado, Erik Agrell, Domaniç Lavery, and Polina Bayvel

Optical Fiber Communication Conference 2015

Los Angeles, California United States
22–26 March 2015
ISBN: 978-1-55752-937-4

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Forward Error Correction Codes (Th3E)

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A. Alvarado, E. Agrell, D. Lavery, and P. Bayvel, "LDPC Codes for Optical Channels: Is the “FEC Limit” a Good Predictor of Post-FEC BER?," in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optica Publishing Group, 2015), paper Th3E.5.

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Abstract

We answer the question in the title negatively. More precisely, the FEC limit is invalid for soft decision decoding and low to medium code rates. A better predictor is the generalized mutual information.

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