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Does anybody know if they are talking about 2.4Ghz or 5Ghz wifi spectrum? I would imagine that the 2.4Ghz spectrum would be the easiest to use to use for detection since it penetrates walls, etc. better.



The paper mentioned in the article [0] and cannonpr's WiBreathe paper both mention 2.4GHz. I would think 5GHz would provide more detail (at the cost of range), but admittedly this isn't my forte at all.

[0] http://arxiv.org/abs/1608.03430




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