[8,4,4] Ext. Hamming Code: Realization 9

In the generator matrix, the fourth and the sixth columns are swapped in order to achieve a quasi-cyclic matrix:

|   1 0 0 0   1 1 1 0   |

G' = |   0 1 0 0   0 1 1 1   |

|   0 0 1 0   1 0 1 1   |

|   0 0 0 1   1 1 0 1   |

Now, the code can be produced by a shift register

which corresponds to a tail-biting trellis with four times the same section:

We get the following realization:

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