It is possible to provide a pulse synchronization demodulation device capable of synchronized-capturing and demodulating a reception pulse signal with a low power consumption and a simple configuration in a high-speed pulse radio transmission. The reception pulse signal based on the on/off keying modulation method has a symbol alternately sampled by AD conversion units (10, 11) operated by a clock signal of a frequency equal to half of the transmission rate. Upon synchronization, phases of two different points at the symbol pulse are sampled by differentiating the delay amount of the sampling timing adjusting units (20, 21). According to the comparison between the obtained sample values, the delay amount of a variable delay unit (40) is adjusted so as to assure synchronization. Upon demodulation, the delay amount of the variable delay unit (40) is held and the delay amounts of the sampling timing adjusting units (20, 21) are switched to an identical value so as to alternately sample the symbol pulse. The obtained sample value is subjected to a threshold value judgment in a demodulation process unit (60) and the result is subjected to a parallel/serial conversion so as to obtain a demodulation output.
PULSE SYNCHRONIZATION DEMODULATION DEVICE