The precision of synchronization algorithms based on the theory ofpulse-coupled oscillators is evaluated on FPGA-based radios for the first time.Measurements show that such algorithms can reach precision in the lowmicrosecond range when being implemented in the physical layer. Furthermore, wepropose an algorithm extension accounting for phase rate deviations of thehardware and show that an improved precision below one microsecond is possiblewith this extension in the given setup. The resulting algorithm can thus beapplied in ad hoc wireless systems for fully distributed synchronization oftransmission slots or sleep cycles, in particular, if centralizedsynchronization is impossible.
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