Low-power wireless networks deployed in indoor environments inevitably 
encounter high-power Cross Technology Interference (CTI) from a wide range of 
wireless devices operating in the shared RF spectrum bands. This severely 
reduces the performance of such networks and possibly causes loss of 
connectivity, which affects their availability and drains their resources. In 
this work, to address the channel uncertainty, a consequence of CTI, we 
propose a novel channel metric that (i) harnesses the local knowledge of a 
node about the wireless channel to discern the presence of persistent 
high-power interferers, and (ii) assists the node in inferring its proximity 
to the dominant interference sources in the physical space. In order to 
motivate and validate the necessity of such a metric, we empirically 
characterize the impact of the interaction between high/low-power cross 
technology interferers and IEEE 802.15.4.