摘要:
An embodiment of the present invention relates to a low-power broadband asynchronous BPSK demodulation method and a configuration of a circuit thereof. In connection with a configuration of a BPSK demodulation circuit, there may be provided a low-power wideband asynchronous binary phase shift keying demodulation circuit comprising: a sideband separation and lower sideband signal delay unit for separating a modulated signal into an upper sideband and a lower sideband using a primary high pass filter, which has a carrier frequency as the cutoff frequency thereof, and a primary low pass filter and digitalizing the same into a positive phase and a negative phase such that, in connection with a digital output from a lower sideband comparator and a digital output from an upper sideband comparator, signals with opposite phases are compared at the same ascending edge and at the same descending edge between a symbol edge and another symbol edge, respectively, thereby reducing jitter to the largest extent, improving the yield ratio, and outputting lower sideband digital signals and upper sideband digital signals, the lower sideband digital signals having been delayed by the 1/4 frequency of the carrier frequency; a data demodulation unit for generating a first symbol edge signal detected by aligning the phase difference between a delayed lower sideband positive-phase digital signal and an upper sideband negative-phase digital signal to be 180° and generating a second symbol edge signal detected by aligning the phase difference between a delayed lower sideband negative-phase digital signal and an upper sideband positive-phase digital signal to be 180°, the data demodulation unit overlapping the first symbol edge signal and the second symbol edge signal through an AND gate, thereby reducing the glitch and generating a symbol edge clock, which has no glitch, through a deglitch filter, the data demodulation unit synchronizing the delayed lower sideband positive-phase digital signal with a descending edge of the symbol edge signal, thereby demodulating data; and a data clock restoration unit for generating a data clock using the delayed lower sideband positive-phase digital signal and the demodulated data signal.
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 1/4 of a cycle of the carrier frequency from a lower sideband analog signal; a data demodulating unit which demodulates digital data by means of, since the phase difference of the delayed lower sideband analog signal and the upper sideband analog signal is aligned at 180 degrees, latching, through a hysteresis circuit, an analog pulse signal appearing in accordance with the phase change part of a signal, that is, a BPSK modulation 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.
标题翻译:SCHALTUNG ZUR ASYNCHRONEN解调VONBINÄRPHASENUMTASTUNGSMODULATION麻省理工学院EXTREM NIEDRIGER LEISTUNGSAUFNAHME UNTER VERWENDUNG VON SEITENBANDFILTERN ERSTER ORDNUNG,死EINER NULL GRAD-PHASE AUSGERICHTET SIND
摘要:
An embodiment of the present invention relates to an ultra low power wideband asynchronous binary phase shift keying (BPSK) demodulation method and a circuit configuration thereof. Provided is an ultra low power wideband asynchronous BPSK demodulation circuit configured by comprising: a sideband division and upper sideband signal delay unit dividing a modulated signal into an upper sideband and a lower sideband by a first order high-pass filter and a first order low-pass filter of which a cutoff frequency is a carrier frequency, so as to output an analog signal delayed by a ¼ period of the carrier frequency from an upper sideband analog signal, and a lower sideband analog signal; a data demodulation unit latching, through a hysteresis circuit, a signal generated by a difference between the analog signals in which a phase difference between the delayed upper sideband analog signal and the lower sideband analog signal is aligned at 0°, that is, an analog pulse signal indicated according to a phase shift part of a BPSK modulation signal, so as to demodulate digital data; and a data clock recovery unit for generating a data clock by using a signal digitalized from the lower sideband analog signal through a comparator and a data signal.