G - Physics – 06 – F
Patent
G - Physics
06
F
340/165
G06F 11/00 (2006.01) H04L 1/00 (2006.01) H04L 7/04 (2006.01)
Patent
CA 1230396
PHD 83308 12 ABSTRACT: In a data transmission system data, more spec- ifically messages can be transmitted in the form of sequentially linked modified code words of a linear block code. The modified code words are obtained by combining the code words formed from the data with a protection word. When modified code words are interleaved bit-wise the sequence of code words of a message can be changed after de-interleaving at the receiver end, by bit shift. So as to make it possible to recognize faulty synchronization, each code word is linked to a protection word which char- acterized its position within the message. The modified code words thus obtained are interleaved bit-wise, trans- mitted and de-interleaved again and each word thus obtained is combined at the receiver end with a check word charac- terizing its position within the message. The protection words and the check words are chosen such, that the key words obtained by combining the protection words and the check words are preferably located in sub-classes which are not used for decoding.
456064
Kirby Eades Gale Baker
N.v.philips'gloeilampenfabrieken
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