Rank-Order Equalization

摘要

For digital data transmitted using a vector signaling encoding, a rank-order equalizer cancels various channel noise such as inter-symbol interference. Further, rank-order units may be cascaded to achieve improved equalization over successive sample vector signals in a rank-order equalizer. Multiple rank-order equalizers further operate in parallel in a feed forward mode or in series in a feedback mode to provide a continuous vector signaling stream equalization.

主权项

1. A system for equalizing a set of signals transmitted over a communication bus, the system comprising:
a sampler configured to obtain a plurality of vector samples of the signals on the communication bus; and a plurality of rank-order equalization units arranged in parallel, wherein each of the rank-order equalization units is connected with the sampler so as to receive at least a first and a second vector sample from the sampler, the rank-order equalization units including:
a rank-order unit configured to sort the first vector sample;a coefficient selector configured to select a set of coefficients based on the result of the rank-order unit; anda subtraction unit operative to subtract the set of coefficients from the second vector sample to produce an equalized vector.