Distance estimation method based on photon counting type laser radar signal reconstruction

The invention provides a distance estimation method based on photon counting type laser radar signal reconstruction. The distance estimation method based on the photon counting type laser radar signal reconstruction comprises the steps of: randomly selecting any one of a noise signal B entering a laser radar detector, a peak value position t0 of each echo signal and a peak value amplitude beta of each echo signal for continuous updating operation while each updating operation; updating the parameters above by adopting an Metropolis algorithm thought. The distance estimation method based on the photon counting type laser radar signal reconstruction can reconstruct target signals with unknown characteristics rapidly, and accordingly finish the distance estimation.