Radio Sensor Development for Location Estimation Using Radio Big Data of ARIB STD-T103/119-compliant Wireless Communication Systems

In this paper, we propose a real-time delay profile measurement method for ARIB STD-T103/119 systems, which can cope with presence of multiple mobile stations (MSs). The proposed method consists of a fast reception gain control method and a delay profile measurement method for multiple MSs. In addition, we develop a radio sensor that implements these proposed methods and evaluate its performance by offline tests. Firstly, we confirmed that the delay time and attenuation level of each path of the channel model set by the multipath fading simulator were appropriately reproduced in the measured delay profile results. Then, we evaluated the frequency of delay profile measurements with the developed radio sensor. When the average received power is –80 dBm or higher, which is the averaged received power range in normal operation, the fast reception gain control method worked effectively, and the delay profile measurement frequency for each MS converged to up to 2.0 times per second, which is much higher than the target values.