Abstract
This paper describes the initial assessment of the phase shift measurement unit embedded in a ZigBee communication device. Such a device can provide a very good base for a range-based indoor positioning or proximity detection system. The paper gives a description of the device and shows the results of test measurements. Tests were performed in various conditions: multipath free, outdoor environment, severe multipath indoor environment and dynamic environment with moving transceiver. The examples of results are depicted and conclusions are drawn. The phase shift measurement technique in the radio frequency (RF) network can increase the use of this networks in the area of localization based services. ARTICLE INFO
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