Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 2149

2. This results in 20 bytes (symbols) of parity capable of correcting up to 10 symbol errors per block. The additional use of interleaving for the UAT ground uplink message allows additional robustness against burst errors. The primitive polynomial of the code is as follows: p(x) = x8 + x7 + x2 + x + 1 Part I Annex 10 — Aeronautical Communications I-12-11 22/11/07 The generator polynomial is as follows: ) ( ∏ = − P i i x α where: P = 139, and α is a primitive element of a Galois field of size 256 (i.e. GF(256)). 12.4.4.2.2.2.2 Transmission order of FEC parity FEC parity bytes are ordered most significant to least significant in terms of the polynomial coefficients they represent. The ordering of bits within each byte shall be most significant to least significant. FEC parity bytes shall follow the message data block. 12.4.4.2.2.3 Interleaving procedure UAT ground uplink messages shall be interleaved and transmitted by the ground station, as listed below:

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