LOS and NLOS path-loss and delay characteristics at 3.35 GHz in a residential environment

A Novel Scheme for NLOS Identification using Energy Detector in 60 GHz Systems

“…Provided that physical distance between transmitted and receive nodes is known exactly, state of channel can be identified by comparing likelihood values for each of estimates (TOA, RSS, and RDS), conditioned on distance. Shimizu et al [12] performed intensive measurements of path-loss and delay-profile characteristics of LOS and NLOS environments in a suburban residential area. Based on their analysis, they found that the delay spread was dependent on distance, and NLOS delay spread was found to be several times larger than that of LOS case.…”

“…NLOS identification and mitigation techniques have been discussed extensively in the literature, but mainly within the cellular network framework [7][8][9][10][11][12][13]. For example, in [7], standard deviation of ranging measurements is compared with threshold for NLOS identification, where measurement noise variance is assumed to be known.…”

A New Low Complexity NLOS Identification Approach Based on Minimum Slope and Kurtosis of Energy Block for 60 GHz System

“…Provided that physical distance between the transmitted and receive nodes is known exactly, the state of the channel can be identified by comparing the likelihood values for each of the estimates (TOA, RSS, and RDS), conditioned on the distance. Shimizu et al [12] performed intensive measurements of path-loss and delay-profile characteristics of LOS and NLOS environments in a suburban residential area. Based on their analysis, they found that the delay spread was dependent on distance, and the NLOS delay spread was found to be several times larger than that of the LOS case.…”

“…NLOS identification and mitigation techniques have been discussed extensively in the literature, but mainly within cellular network framework [7][8][9][10][11][12][13]. For example, in [7], skewness of ranging measurements is compared with threshold for NLOS identification, where measurement noise variance is assumed to be known.…”

A New Low Complexity NLOS Identification Approach Based on Maximum Slope and Skewness of Energy Block for 60GHz System

“…The NLOS identification and mitigation techniques have been discussed extensively in the literature, but mainly within the cellular network framework [7][8][9][10][11][12][13]. For example, in [7], skewness of the ranging measurements is compared with the threshold for NLOS identification, where the measurement noise variance is assumed to be known.…”