Patent ID: 7933362

Claim:
A multilevel QAM symbol timing detector for detecting symbol timing of a multilevel QAM communication signal, and a multilevel QAM communication signal receiver, comprising: sampling point amplitude detectors for buffering the amplitude data of the multilevel QAM communication signal detected using an oversampling frequency with a predetermined factor in 1-symbol period units and detecting amplitude data for each sampling time corresponding to the oversampling frequency; sampling timing-dedicated amplitude data buffers for buffering respective amplitude data corresponding to each sampling time within the 1-symbol period over predetermined intervals; amplitude histogram generators for generating histograms of amplitude data within the predetermined intervals, stored in each of the sampling timing-dedicated amplitude data buffers; a symbol timing detector for detecting, as symbol timing, a sampling time corresponding to the amplitude data with the highest detection frequency based on the results of the amplitude histogram generators; samplers for down-sampling the multilevel QAM communication signal using the symbol timing signal outputted from the multilevel QAM symbol timing detector; and a baseband demodulator for demodulating a baseband multilevel QAM signal sampled by the samplers.