Locating the position of objects in non-line-of-sight based on time delay estimation
Wang Xue-Feng1, 2, Wang Yuan-Qing1, †, , Su Jin-Shan1, 2, Yang Xing-Yu1, 2
       

Received signals by four APDs from one point of the hidden object. (a) Four signals received by four APDs respectively from one point of the hidden object, (b) the light transmission process of the laser source to the four APDs.