One Way Ranging Time Drift Compensation for Both Synchronized and Non-Synchronized Clocks

摘要

Ranging and localization are some of the key applications in a wireless sensor network. Good accuracy can be obtained if the signals captured are of good qualities. In a practical scenario, crystal clock time drift in the devices in a wireless sensor network can greatly influence the ranging and localization accuracy. However, crystal clock time drift can be overcome by having multiple transmissions between the transmitter and receiver. If we do not have the luxury of performing multiple transmitting and replying of messages and we are limited by having only a pair of transmitter and receiver radio, ranging operations with good accuracy might be difficult to carry out. In this paper, we discuss how to perform ranging using One Way Ranging based method between a pair of transmitter and receiver in the presence of crystal clock time drift. We will introduce a compensating factor to overcome the crystal clock time drift so that it can reduce the ranging inaccuracy. In addition, ranging analysis for both synchronized and non-synchronized clocks between the transmitter and receiver in the presence of crystal clock time drift is carried out.