How Vehicle Radar Systems Correct Phase Errors for Better Object Detection
A radar system for cars that switches between two modes with different pulse speeds to fix phase errors, helping the vehicle more accurately track the direction and speed of objects.
Original patent title: “Radar device for vehicle and controlling method thereof”
A radar system for cars that switches between two modes with different pulse speeds to fix phase errors, helping the vehicle more accurately track the direction and speed of objects. Granted to HL Klemove Corp in 2025 with 17 claims.
Key facts
Coverage
What does this patent actually cover?
This radar device uses two distinct operating modes, each with a different pulse repetition interval (the time between radar pulses). By comparing the signals received in these two modes, the system can identify and correct phase errors that occur when a target is moving quickly. Specifically, the signal processor checks if a preset condition is met—such as when the phase difference exceeds a certain threshold or when Doppler frequency limits are crossed—and then applies a phase correction to the second mode's data. This ensures the radar maintains accurate target direction information even in complex driving environments.
The gap
What does this patent NOT cover?
- Does not cover radar systems that rely on a single, fixed pulse repetition interval.
- Does not cover systems that do not perform phase correction between two distinct operational modes.
- Does not cover non-radar sensing technologies like LiDAR or ultrasonic sensors.
- Does not cover software-only signal processing that is not integrated with a dual-mode transmission antenna setup.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
The innovation lies in using the first mode as a reference to 'fix' the phase data of the second mode, specifically by adding a phase shift of pi when the system detects that the Doppler frequency of the first mode exceeds the maximum limit of the second mode.
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Adaptive cruise control radar sensors
Automotive collision avoidance systems
Autonomous vehicle object tracking modules
Why it matters
The bigger picture
As vehicles move toward higher levels of autonomy, radar reliability is critical. This patent addresses the 'ambiguity' problem in radar, where fast-moving objects can cause phase shifts that lead to incorrect distance or speed calculations. By using a dual-mode approach, it improves the sensor's ability to track objects accurately in real-time, which is essential for collision avoidance and adaptive cruise control systems.
Filed
February 18, 2022
Granted
June 17, 2025
Market context
Who's building on this
Companies in this space
HL Klemove, a major supplier in the automotive electronics space, is the primary developer here. This technology is being built upon by major Tier-1 automotive suppliers and OEMs who are integrating increasingly sophisticated radar signal processing into their Advanced Driver Assistance Systems (ADAS).
Market impact
This patent provides a specific technical method for improving radar precision, which helps manufacturers meet the stringent safety requirements for autonomous driving. It enables more robust object tracking in high-speed scenarios, potentially reducing false positives in emergency braking systems.
Claim 1 — Plain English
What this patent covers
This radar device uses two distinct operating modes, each with a different pulse repetition interval (the time between radar pulses). By comparing the signals received in these two modes, the system can identify and correct phase errors that occur when a target is moving quickly. Specifically, the signal processor checks if a preset condition is met—such as when the phase difference exceeds a certain threshold or when Doppler frequency limits are crossed—and then applies a phase correction to the second mode's data. This ensures the radar maintains accurate target direction information even in complex driving environments.
The clever bit
The innovation lies in using the first mode as a reference to 'fix' the phase data of the second mode, specifically by adding a phase shift of pi when the system detects that the Doppler frequency of the first mode exceeds the maximum limit of the second mode.
What it does not cover
- Does not cover radar systems that rely on a single, fixed pulse repetition interval.
- Does not cover systems that do not perform phase correction between two distinct operational modes.
- Does not cover non-radar sensing technologies like LiDAR or ultrasonic sensors.
- Does not cover software-only signal processing that is not integrated with a dual-mode transmission antenna setup.
Patent timeline
Application submitted to the patent office
Application published, typically 18 months after filing
Patent officially issued
PatentBrief Score
Impact Score
Early stage
Citation count
0/40
No citations yet
Claim breadth
11/20
Broad claimsclaimsThe numbered statements at the end of a patent that legally define what the inventor owns.Read more →
Recency
20/20
Granted within 5 years
Assignee scale
0/20
Independent or smaller assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$35K – $112K
Midpoint $70K · 15.7 yr remaining · industry ×1.5
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
The original legal language
Original claims
17 claims as filed with the patent office.
Concepts involved
Citations
Patent lineage
Cite this patent
LEE, H. B., LEE, J., Choi, J. H., & Han, J. H. (2025). How Vehicle Radar Systems Correct Phase Errors for Better Object Detection (U.S. Patent No. 12,332,345). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/12332345/raptor-3
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
Frequently Asked Questions
What does How Vehicle Radar Systems Correct Phase Errors for Better Object Detection cover?
A radar system for cars that switches between two modes with different pulse speeds to fix phase errors, helping the vehicle more accurately track the direction and speed of objects.
Who owns patent US 12332345?
HL Klemove Corp owns this patent, granted in 2025.
When does this patent expire?
This patent is expected to expire on June 17, 2045, when the invention enters the public domain.
What problem does this patent solve?
As vehicles move toward higher levels of autonomy, radar reliability is critical. This patent addresses the 'ambiguity' problem in radar, where fast-moving objects can cause phase shifts that lead to incorrect distance or speed calculations. By using a dual-mode approach, it improves the sensor's ability to track objects accurately in real-time, which is essential for collision avoidance and adaptive cruise control systems.
What does this patent NOT cover?
Does not cover radar systems that rely on a single, fixed pulse repetition interval.
Patent monitoring