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Receiver synchronization


What would be the equivalent of "comma detect" in a 64B66B based link? How
would a receiver, upon receiving a serial bit stream encoded with 64B66B
code, know where the boundary of a 64-bit block is? Assume a Serial PMD
operating at 10.3 GHz and a bit-deserializer. I will also appreciate some
comments on the complexity of implementing this synchronization, relative
to a link based on 8B10B transmission code.