Channel Sounding on nRF54L15DK – Accuracy of IFFT Valuehttps://devzone.nordicsemi.com/f/nordic-q-a/123554/channel-sounding-on-nrf54l15dk-accuracy-of-ifft-valueDear Nordic Support, I am currently performing initial tests for distance measurement using Channel Sounding with the nRF54L15 Development Kit. Here are the details of my setup: I am using two nRF54L15DK boards . One board is configureden-USTelligent Community 13Fri, 08 Aug 2025 12:52:57 GMTRE: Channel Sounding on nRF54L15DK – Accuracy of IFFT Valuehttps://devzone.nordicsemi.com/thread/545061?ContentTypeID=1Fri, 08 Aug 2025 12:52:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dcd7ad1b-10c8-4e54-ab83-a31d67a7d214Ressa<p>Hi,&nbsp;<br /><br />Regarding the distance measurement accuracy of channel sounding, we recommend to use IFFT method for short distance measurements and RTT for long distance.&nbsp; IFFT method&nbsp;has a usable&nbsp;resolution of 50 cm. For RTT it is 5 m. So there are variation and deviation in the measured numbers. While most of the measurement should fit into these resolutions, under harsh condition it can fall out of these numbers. It should be noted that channel sounding distance measurements are sensitive to channel condition (surrounding environment under test) and also the algorithm being used. So&nbsp;a good approach for real applications of ranging would be to see what is the accuracy needed for the application and then looking at channel sounding measurements to see if it can be used for such use cases.</p><div style="clear:both;"></div>