Methods and apparatus for synchronization in multiple-channel communication systems

摘要

Methods and apparatus for processing multichannel signals in a multichannel receiver are described. In one implementation, a plurality of demodulator circuits may provide a plurality of outputs to a processing module, with the processing module then simultaneously estimating noise characteristics based on the plurality of outputs and generating a common noise estimate based on the plurality of outputs. This common noise estimate may then be provided back the demodulators and used to adjust the demodulation of signals in the plurality of demodulators to improve phase noise performance.

主权项

1. A method for enhancing multichannel receiver demodulation performance comprising:
receiving a channel bonded multichannel signal; providing a plurality of channels of the channel bonded multichannel signal to a corresponding plurality of demodulator circuits; processing, in the demodulator circuits, the plurality of channels so as to generate a corresponding plurality of output signals; processing, in parallel, the plurality of output signals to generate a plurality of estimates of a common noise component of the channel bonded multichannel signal; and generating, based on the plurality of estimates of the common noise component, a composite estimate of the common noise component, wherein:
the processing of the plurality of output signals to generate the plurality of estimates of the common noise component comprises generating a plurality of decisions as to constellation points that most likely correspond to symbols received on the plurality of channels; andthe processing of the plurality of output signals to generate the plurality of estimates of the common noise component comprises determining angles between actual signal levels of the plurality of output signals and ideal signal levels corresponding to the decided most-likely constellation points.