METHOD FOR PULSE LOCATION RANGING Russian patent published in 2023 - IPC G01S7/48 G01C3/08 G01S17/08 H01L31/107 

FIELD: range measurement techniques.

SUBSTANCE: invention relates to a range measurement technique, in particular to the reception of optical signals using avalanche photodiodes, and can be used in location, communications and other photoelectronic systems. The claimed method includes sending a probing light pulse to the target, receiving the radiation reflected by the target using an avalanche photodiode, thresholding the received signal, measuring the time interval T between the moments of emission of the probing pulse and receiving the reflected signal U_s that has exceeded the threshold U_thr, followed by determining the range R. optimal signal-to-noise avalanche mode of the photodiode, determine the minimum U_min and maximum U_max values of the amplitude range of microplasma pulses arising in the process of avalanche multiplication in the photodiode, determine the amplitude U_smax of the reflected signal, perform its threshold processing above the maximum and below the minimum values of the amplitude range of microplasma pulses . Wherein the frequency f of exceeding the threshold by noise emissions is determined by counting the number N of exceeding the threshold by noise emissions over time T and the frequency is calculated using the formula f = N/T, and set so that in the operating mode during the measurement time T_ms it does not exceed the limit value f_max = W_M/T_ch, where W_M = (W - W_N) - the maximum allowable probability of missing a signal due to the prohibition of reception in the presence of microplasmas; W = (1 - D) - skip probability; D is the probability of correct detection; W_N is the maximum allowable probability of signal skipping due to noise.

EFFECT: achievement of maximum sensitivity in all operating conditions, taking into account microplasma breakdowns and normal noise with a minimum time to reach the optimal avalanche mode.

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