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The special identifier one and one has four opportunity to be mis detected to either one of the four adjacent constellation points, this will lead to much worse BER as eleven B seven T decoder has more opportunity to select different branch rather than original encoded branch at transmitter side.
The right trapezoid eleven B seven T includes right trapezoid three B two T with two and two as redundant constellation point and Gray coding based two B one T.
This scheme has same partitioning and reshuffling scheme as Gray coding eleven B seven T scheme in the prior table. |