Synthesis and open loop synchronization method of photon detection array signal

The invention relates to a synthesis and open loop synchronization method of a photon detection array signal, and belongs to the field of deep-space laser communications. The method comprises the following steps: firstly, detecting a PPM (Pulse Position Modulation) signal after channel transmission by N photon detectors; secondly, measuring the arrival time of each photon of each branch signal and finishing the combination of each branch signal; thirdly, performing timing error estimation, and performing PPM time slot data recovery on a composite signal according to estimated initial phase deviation and frequency deviation; and finally, demodulating and outputting. The synthesis and open loop synchronization method of the photon detection array signal provided by the invention realizes PPM time slot synchronization by measuring the arrival time of the photons so as to further realize demodulation; an open loop synchronization mode is adopted to replace a closed loop clock synchronization mode of a phase-locke