Decision feedback equalizer for highly spectrally efficient communications

摘要

One or more embodiments describe a decision feedback equalizer for highly spectrally efficient communications. A method may be performed in a decision feedback equalizer (DFE). The method may include initializing values of tap coefficients of the DFE based on values of tap coefficients of a partial response filter through which said transmitted symbols passed en route to said sequence estimation circuit. The method may include receiving estimates of transmitted symbols from a sequence estimation circuit, and receiving an error signal that is generated based on an estimated partial response signal output by the sequence estimation circuit. The method may include updating values of tap coefficients of the DFE based on the error signal and the estimates of transmitted symbols. The method may include generating one or more constraints that restrict the impact of the error signal on the updating of the values of the tap coefficients of the DFE.

主权项

1. A system comprising:
an electronic receiver comprising sequence estimation circuitry and response determination circuitry, wherein: said response determination circuitry is operable to:
determine a first response that is based on a second response that compensates for inter-symbol interference intentionally introduced in a signal by a transmitter and a third response that compensates for nonidealities of a channel that said signal traverses en route to said receiver; andprovide said determined first response to said sequence estimation circuitry; and said sequence estimation circuitry is operable to:
generate a decision as to a sequence of transmitted symbols that correspond to said signal based on said determined first response provided by said response determination circuitry.