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Ultra low power wideband non-coherent binary phase shift keying demodulator using first order sideband filters with phase 180 degree alignment
Ultra low power wideband non-coherent binary phase shift keying demodulator using first order sideband filters with phase 180 degree alignment
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机译:超低功耗宽带非相干二进制相移键控解调器,使用具有180度相位对准的一阶边带滤波器
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摘要
A BPSK demodulator circuit comprises: a sideband-separating and lower sideband signal-delaying unit which separates a modulated signal into a lower sideband and an upper sideband by a primary low pass filter and a primary high pass filter having a cut-off frequency as a carrier frequency, and which outputs an upper sideband analog signal and an analog signal delayed by ¼ of a cycle of the carrier frequency from a lower sideband analog signal; a data demodulating unit which demodulates digital data by means of latching, through a hysteresis circuit, an analog pulse signal appearing in accordance with the phase change part of a signal generated by the sum of the analog signals; and a data clock restoring unit which generates a data clock by using a data signal and a signal having the delayed lower sideband analog signal digitized through a comparator.
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