Measurement and Statistical Analysis of Distinguishable Multipaths in Underground Tunnels

Algorithm 1

LOS and NLOS identification with the LS-SVM.

	Input: training set ,
	Testing data .
	Output: identification results.
	\\Training phase:
(1)	Obtain the Lagrangian dual based on equation (9);
(2)	Set partial derivatives of the Lagrangian dual to parameters , , , and to zero;
(3)	We can obtain
	\\Testing phase:
(4)	For the given testing data , we calculate the output based on equation (11);
(5)	Identify LOS and NLOS conditions based on equation (6).