NLOS channel identification based on energy detection in 60 GHz communication systems

Indoor localization techniques can produce significant errors in non-line-of-sight (NLOS) channels. To mitigate this problem, a new approach to channel identification based on the ratio of the minimum slope and skewness of the output of an energy detector is presented. The IEEE 802.15.3c 60 GHz channel models are used to examine the performance of this technique. The simplicity of the proposed approach lies in the use of an energy based time of arrival (TOA) estimation algorithm. Performance results are presented which show that accurate identification of the type of channel can be achieved.