File Protection Scheme

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Developed by DLR, the file protection scheme provides the elements, functions and interfaces to encode files stored in the mass memory in order to protect them against long error-bursts/outages in optical satellite downlinks, correct the error-bursts/lost packets in the received file with a packet level decoder, and reconstruct the original file.

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Performance:  

  • Correction of long error-bursts (e.g. 10 Mbit up to 200 Mbit long error-bursts)

  • Error correction capability: up to 20% erroneous / lost packets

  • Offline encoding and decoding of the file

Achievements:  

  • The file protection scheme has been implemented and tested on a PC

  • The target performance has been achieved

  • The file protection scheme is compatible with arbitrary PHY layer frame formats

  • The decoder PC interfaces with the optical downlink receiver and stores the received data packets in real time