Hey everyone,

Great stuff that you guys are doing at DIY!!!

I was wondering if anyone could help me out with a localization problem. I'm building an indoor UAV and am exploring options for localization, one option is of course SLAM but that demands a scanning laser range finder in addition to tons of computing power. I was considering using NLOS(Non Line-of-Sight) Probes for localization.

One option is of course by checking the strength of a Wifi signal but that's very very inaccuarte(1-3 m), especially for an indoor environment. I'm allowed to use just two as per regulations and in my efforts I came across a company 'Ubisense' that offers a solution using Time-Delay-of-Arrival as well as Angle of Arrival to compute distance of a tag from a probe. The issue is that it's designed for assets such as office personnel or alzheimer patients and even cattle. It hence demands as many probes as possible for maximum accuracy. The company website http://www.ubisense.net/en/resources/factsheets/series-7000-ip-sens... does say(under 'Accuracy') that it will work with just two probes but I'm very concerned about the level of accuracy.

Could someone please guide me on systems that I can possibly use for NLOS localization?

Thanks a ton,

Saurabh Ladha
+971-552207223