Range finding could come to RC

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Range finding could come to RC

Postby ergocentric » Fri Jul 29, 2011 4:27 pm


How it Works

Range Finder takes advantage of special packets in the 802.11 standard that are generated automatically by the hardware of the Wi-Fi radio chips in response to certain events. These hardware generated packets are created in such predicable time frames that the Range Finder software can calculate distances by subtracting out the time that it takes hardware to generate such a packet, and is left with the time that it takes light to make a round trip between the two radios.

one small step for Nomadio from Mesh network to Radio Control
unconcerned but not indifferent - MAN RAY
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Re: Range finding could come to RC

Postby RCModelReviews » Fri Jul 29, 2011 8:33 pm

Radio waves travel at a rate of 1 foot (300mm) per nanosecond so radio range-finding can work fairly well -- providing your hardware can resolve time delays down to a sufficient resolution. In theory, you could also use the frequency (dopler) shift of the received signal to calculate the speed too!

Of course with telemetry becoming increasingly commonplace and adding a mere 12-20g to the average airborne RC system, I wonder if this is a solution looking for a problem.
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