Single and Secondary Path Recognition Based on Signal Detection in Non-Line-of-Sight Environment

Aiming at the problem of identifying single and multiple scattering paths in the NLOS(Non-Line-of-Sight) propagation environments, in this paper a secondary scattering ring model based on single scattering ring model is proposed, and the statistical characteristics of this model are analyzed. At the same time, based on the theory of signal statistical detection, a single-shot and a second-shot scattering path detection model are established. Then, based on whether the prior probabilities are known, the generalized likelihood ratio and Neiman Pearson criterion are utilized to detect and identify the two kind of scattering paths. Simulation results show that the detection and identification method proposed in this paper can effectively identify two scattering paths under the NLOS environment. Compared with the LPMD (Line of Possible Mobile Device) algorithm, it has a higher recognition rate and a smaller false alarm probability and missed alarm probability, and the time overhead is small, it has certain application value.