Patent ID: 7796708

Claim:
A method for communication, comprising: assigning respective weights to a plurality of points distributed over a signal space; at a first time, defining a first partitioning of the signal space into decision regions; based on the first partitioning, receiving and demodulating a signal using a carrier recovery loop, which is controlled by a decision-directed error signal, so as to derive a corresponding signal point in the signal space; setting at least one of an amplitude and a phase of the decision-directed error signal responsively to a respective one of the weights assigned to the derived signal point; adjusting the carrier recovery loop using the error signal, responsively to a weight assigned to the derived signal point; and at a second time subsequent to the first time, re-partitioning the signal space into the decision regions in accordance with a second partitioning, different from the first partitioning, and demodulating the signal based on the second partitioning.