Protograph code for deep space optical communication system
An optical communication system and prototyping technology, applied in the field of coding technology, to achieve the effect of excellent bit error performance
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[0035] The present invention will be further described below in conjunction with the accompanying drawings.
[0036] For deep space optical communication systems using pulse position modulation (PPM) and bit-interleaved coded modulation-iterative decoding (BICM-ID) receiving schemes, a prototypical code is provided with a code rate of 1 / 2 , the corresponding original model is as image 3 As shown, it contains 4 variable nodes, 2 check nodes, and 10 edges, and the 4 variable nodes do not include punching nodes; the basic matrix corresponding to the original model graph is:
[0037] 1 1 0 2 1 2 2 1 ;
[0038] Among them, each row of...
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