Methods and systems for high bandwidth communications interface

An apparatus comprising:

• a set of summation nodes, each summation node configured to receive a respective symbol of a codeword of a balanced vector signaling code via a respective wire of a multi-wire bus and to responsively introduce a corresponding correction signal into the respective wire, the correction signal representing a re-encoded symbol of a re-encoded codeword, the re-encoded codeword obtained by re-encoding a previously-decoded codeword;
• a plurality of multi-input comparators configured to form a plurality of output signals, each multi-input comparator configured to form a respective output signal by forming a respective weighted combination of the received symbols of the codeword, the respective weighted combination determined by a corresponding vector of an orthogonal matrix;
• a plurality of slicers configured to receive the plurality of output signals and to responsively generate a plurality of output data bits;
• and
• an encoder configured to generate a re-encoded codeword based on the output data bits for use in a set of symbols of a codeword received in a subsequent unit interval.