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Validity decision circuit capable of correctly deciding validity of an error signal in a multilevel quadrature amplitude demodulator
Validity decision circuit capable of correctly deciding validity of an error signal in a multilevel quadrature amplitude demodulator
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机译:能够正确判定多电平正交振幅解调器中的误差信号的有效性的有效性判定电路
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摘要
In a demodulator for demodulating a multilevel quadrature amplitude modulated signal specified by a plurality of output signal points arranged on an approximately octangular specific region into an in-phase baseband signal and a quadrature baseband signal and for converting the in-phase and the quadrature baseband signals into a demodulator output signal and an error signal, a validity decision circuit (40) is supplied with the in-phase and the quadrature baseband signals to decide that the error signal is valid when at least one reception signal point is outwardly of the approximately octangular specific region.
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