Fig. 4From: NuWa: off-state tolerant backscattering system with uncontrolled excitation trafficsThe preamble design of the tag. A longer preamble has a higher probability of encountering the “on” state. While a shorter preamble may drop into the “off” state. NuWa adopts both preamble and postamble to increase the opportunities of detecting the incoming packetsBack to article page