Pipelined Parallel Decision Feedback Decoders for High-Speed Communication Systems.

摘要

The invention relates to techniques for pipelining parallel decision feedback decoders (PDFDs) for high speed communication systems, such as 10 Gigabit Ethernet over copper medium (10GBASE-T). In one aspect, the decoder applies look-ahead methods to two concurrent computation paths. In another aspect of the invention, retiming and reformulation techniques are applied to a parallel computation scheme of the decoder to remove all or a portion of a decision feedback unit (DFU) from a critical path of the computations of the pipelined decoder. In addition, the decoder may apply a pre-cancellation technique to a parallel computation scheme to remove the entire DFU from the critical path.