Demultiplexing processing for a receiver

摘要

We disclose demultiplexing processing for an adaptive MIMO equalizer of a receiver of multiplexed communication signals implemented in a manner that significantly reduces the occurrence of singularities at the equalizer output without a significant concomitant increase in the required computational power. The receiver includes an equalizer controller that operates to dynamically track the degree of correlation of one or more pairs of equalized signals outputted by the MIMO equalizer and to use the tracking results to configure the MIMO equalizer in a manner that substantially prevents any two outputs of the MIMO equalizer from converging to the same state. In an example embodiment, the degree of correlation can be determined in a computationally efficient manner by identifying and comparing quadrants in which complex values produced at the different outputs of the MIMO equalizer are located over a plurality of time slots.

主权项

1. An apparatus comprising:
a digital signal processor that comprises an equalizer configured to equalize first complex electrical digital signals of a first sequence and to equalize different second complex electrical digital signals of a second sequence; and wherein the digital signal processor is configured to make quadrant measurements of individual ones of the complex digital signals of the first sequence and to make quadrant measurements of individual ones of the complex digital signals of the second sequence; and wherein the digital signal processor is further configured to evaluate a correlation between the quadrant measurements of the individual ones of the complex digital signals of the first sequence with the quadrant measurements of the individual ones of the complex digital signals of the second sequence.