Clock synchronization and ranging are important topics in the field of wireless networks, where internode time measurement allows both tasks to be completed in one. Such networks are generally time-variant due to possible changes in environmental conditions and mobility of network nodes. We present a fully distributed filtering algorithm for combined clock synchronization and ranging based on message passing by belief propagation on a factor graph representation of a time-variant wireless network. The resulting message passing equations can be interpreted as a variant of Kalman filtering locally on each network node. Simulation results show that tracking estimation parameters improves estimation accuracy significantly without additional communication effort.
Weiße Norm und Schwarzes Wissen im rechtlichen Raum 1[…] the racism of institutions elicits barely any attention, and still less emotion and uproar. It exhibits no fiery hatred, reveals no easily singled out and easily condemned culprit or decision, stimulates no fury or moment of truth. There is only the steady, unremarkable progression of reality, the day-to-day doldrums of racial discrimination.
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