Qam demodulator with rapid resynchronization function

Details Qam demodulator with rapid resynchronization function Qam demodulator with rapid resynchronization function

H - Electricity

04

L

329/3

H04L 27/00 (2006.01)

Patent

CA 1293030

"QAM Demodulator With Rapid Resynchronization Function" ABSTRACT In order to rapidly resynchronize a QAM demodulator by effectively operating a transversal equalizer, a message point of an incoming quadrature-modulated signal is checked as to its location within a signal space diagram. In the event that the message point is deviated within a predetermined region of the signal space diagram, a transversal filter functions normally irrespective of whether or not a demodulating section is synchronized, while in the event that the message point is deviated outside the predetermined region, the transversal filter is allowed to perform the normal operation-thereof only if the demodulating section is in synchronism.

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