A geometric wireless location system utilizing downlink pilot strength measurement messages

In this paper, the performance of the wireless-signal map-matching method under a code division multiple access network environment is demonstrated. The wireless-signal map-matching method is the key step to implement the recently introduced wireless location technology referred to as the localization exploring network measurement occurrences. The wireless-signal map-matching method is applied to the downlink pilot strength measurement messages collected under typical urban environments. From the experiment results it is shown that an accuracy improvement is possible by revealing the spatial structure of non-line-of-sight errors without any GPS information.