University of Twente Student Theses


Forward error correction and failure rates on Aurora high-speed links

Brakels, M. (2017) Forward error correction and failure rates on Aurora high-speed links.

Abstract:Data interconnects require more and more bandwidth increasing the data rate per lane. The result is that the signal quality is less than ideal and one has to be careful in how to handle bit errors. This report will look into the handling of bit errors using Forward Error Correction (FEC). For the Forward Error Correction, a Reed-Solomon algorithm is used because it has a hard bound on error correction strength. As the FEC is not placed next to the transceiver but at a small distance from it, all the logic in between needs to be analysed. This logic in between is the primary source of unrecoverable errors as Reed-Solomon does not protect this. The calculated Mean Time Between Failures (MTBF) is around 40,000 years at BER of 10−12. The system is also simulated but at a higher BER. For BER of 4.88 ∙ 10−4 a failure rate of 8.86% is found for a block of 170 kb. It is hard to proof the design because of the low BER, a pessimistic estimation with 95% confidence results in an MTBF of 6766 years or more. This is a lot better than no FEC at all. It can be improved by moving the FEC closer to the transceiver.
Item Type:Essay (Master)
Thales, Hengelo
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:54 computer science
Programme:Embedded Systems MSc (60331)
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