US 12,425,271 B1
Efficient ranging algorithm for high accuracy distance measurements
Sauli Lehtimaki, Nummela (FI)
Assigned to Silicon Laboratories Inc., Austin, TX (US)
Filed by Silicon Laboratories Inc., Austin, TX (US)
Filed on Mar. 6, 2024, as Appl. No. 18/597,214.
Int. Cl. H04L 25/02 (2006.01)
CPC H04L 25/022 (2013.01) [H04L 25/0204 (2013.01); H04L 25/0224 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of calculating a distance between two wireless network devices, comprising:
performing a Channel Sounding procedure at a plurality of frequencies to obtain a channel frequency response;
using the channel frequency response to generate a power ratio as a function of distance, wherein power ratio is defined as trial signal power divided by remaining power; and
identifying a first peak in the power ratio, wherein the first peak corresponds to the distance between the two wireless network devices.