Patent ID: 7415090

Claim:
A method of performing loop timing recovery of received data in a multiple channel communications system, the method comprising: selecting at least one channel among a plurality of channels in the multiple channel communications system on which the received data signals are largely unaffected by noise by detecting channel noise among the received data signals; selecting at least one channel among the plurality of channels on which the received data signals have a magnitude greater than a predetermined magnitude among the received data; folding the received data signals of the selected at least one channels onto a 1 st quadrant of a quadrature amplitude modulation (QAM) coordinate plane; rotating and mapping the folded received data signals of the selected at least one channels onto a Real=Imaginary axis; shifting the rotated received data signals to a reference constellation having predetermined value; and unfolding the shifted received data signals onto 2 nd , 3 rd , and 4 th quadrants of the QAM coordinate plane to coincide with a 4-QAM format.