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Samsung patents radar method to pinpoint target direction more accurately

Samsung has been granted a patent for a method that improves how radar sensors determine the direction of a target. The system extracts two different signal patterns from the radar data to calculate a rough direction, then uses this estimate to filter out incorrect possibilities and select the final, precise angle.

Why it mattersThis technique could help devices like autonomous vehicles or security systems locate objects more reliably by resolving common radar ambiguities.

In the filing’s own words

A method includes extracting a first chirp sequence signal and a second chirp sequence signal from a radar signal, determining a first phase difference of the first chirp sequence signal based on a distance between antenna elements of the array antenna, determining a second phase difference of the second chirp sequence signal based on the distance between the antenna elements of the array antenna, determining a first direction of arrival (DOA) frequency based on a first carrier frequency based on the first phase difference, determining a second DOA frequency based on a second carrier frequency based on the second phase difference, estimating a preliminary DOA of a target based on a frequency difference between the first DOA frequency and the second DOA frequency, determining ambiguous DOA candidates, and selecting a final DOA of the target from the ambiguous DOA candidates based on the preliminary DOA.

What exactly they claim (claim 1)

1. A processor-implemented method, the method comprising: extracting a first chirp sequence signal of a first carrier frequency and a second chirp sequence signal of a second carrier frequency from a radar signal received through an array antenna in a radar sensor; determining a first phase difference of the first chirp sequence signal based on a distance between antenna elements of the array antenna; determining a second phase difference of the second chirp sequence signal based on the distance between the antenna elements of the array antenna; determining a first direction of arrival (DOA) frequency based on the first carrier frequency of the first chirp sequence signal based on the first phase difference; determining a second DOA frequency based on the second carrier frequency of the second chirp sequence signal based on the second phase difference; estimating a reference DOA of a target based on a frequency difference between the first DOA frequency and the second DOA frequency; determining ambiguous DOA candidates at a predetermined time interval based on an ambiguity number derived from an ambiguous DOA of the target measured by the first chirp sequence signal; and selecting a final DOA of the target from the ambiguous DOA candidates based on the reference DOA, wherein the ambiguous DOA candidates correspond to the determined first phase difference and the ambiguous DOA candidates have differences corresponding to the predetermined time interval.

Facts

Company
Samsung (Samsung Electronics Co., Ltd.)
Official title
Method and apparatus with radar signal processing
Patent number
US12724114B2
Application number
18112723
Filed
Feb 22, 2023
Granted
Sep 1, 2026
Inventors
2
Claims
20

Classified under

G01S 7/354 Physics & computingG01S 7/03 Physics & computingG01S 13/42 Physics & computingG01S 13/931 Physics & computing
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.