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Samsung patents wireless distance measurement using noise subtraction

Samsung describes a method for electronic devices to measure the distance between them by analyzing radio signals. The system receives a signal containing a specific pattern mixed with artificial noise, then subtracts the noise to recover the pattern and calculate travel time.

Why it mattersThis technique could improve the accuracy of location tracking and device positioning in crowded wireless environments by filtering out interference.

In the filing’s own words

Methods and devices for performing channel sounding, including: receiving a channel sounding signal generated based on a sounding sequence and an artificial noise symbol from the second electronic device; subtracting the artificial noise symbol from the channel sounding signal to reconstruct the sounding sequence; calculating a travel time between the first electronic device and the second electronic device based on the sounding sequence; and determining a distance between the first electronic device and the second electronic device based on the travel time.

What exactly they claim (claim 1)

1. A first electronic device for performing channel sounding, the first electronic device comprising: a transceiver configured to communicate with a second electronic device; at least one processor; and a memory configured to store instructions which, when executed by the at least one processor, cause the first electronic device to: receive a channel sounding signal generated based on a sounding sequence and an artificial noise symbol from the second electronic device; subtract the artificial noise symbol from the channel sounding signal to reconstruct the sounding sequence; calculate a travel time between the first electronic device and the second electronic device based on the sounding sequence; and determine a distance between the first electronic device and the second electronic device based on the travel time.

Facts

Company
Samsung (SAMSUNG ELECTRONICS CO., LTD.)
Official title
METHOD AND APPARATUS FOR PERFORMING CHANNEL SOUNDING USING TRANSPARENT PSEUDO RANDOM NOISE
Publication number
US20260280799A1
Application number
19562181
Filed
Mar 10, 2026
Published
Sep 17, 2026
Inventors
2
Claims
20

Classified under

H04L 5/0048 Electricity & electronicsH04L 27/2092 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.