Coordinated Interference Cleaning for V2X Radar

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Solution Overview

Problem

In wireless communication systems, particularly in vehicle-to-everything (V2X) systems, radar signals from multiple vehicles can interfere with each other, leading to inaccurate and inefficient target detection, as they lack identifying features and obscure or drown out radar reflections from potential collision targets.

Innovation Solution

The described techniques involve a method and apparatus for coordinated interference cleaning, where a user equipment (UE) receives indications of the location and parameters of nearby UE radar transmissions, allowing it to identify and compensate for interference by generating a radar image that distinguishes between interference and target reflections through frequency spectrum analysis and nulling of interference data points.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple vehicles transmit radar signals for collision avoidance, then collision detection capability is improved, but interference between radar signals increases causing target detection accuracy to deteriorate

Engineering Contradiction:

Improvecollision detection capabilityVSAvoidtarget detection accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent converts the harmful interference from other radar signals into a beneficial resource by using the known interferer location and timing information to predict and remove interference components from the received signal spectrum, thereby improving target detection accuracy while maintaining multiple vehicle radar transmission

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent performs preliminary interference prediction and removal by receiving location and timing information from other vehicles before processing the radar signal spectrum, allowing the receiving vehicle to pre-identify and remove interference components before they corrupt the target detection process

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If radar signals are transmitted without identifying features, then signal simplicity is improved, but ability to distinguish interference from target reflections deteriorates

Engineering Contradiction:

Improvesignal complexityVSAvoidinterference identification difficulty

Core Design Contradiction:

Device complexityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent introduces an intermediary solution by using location and timing information from other vehicles as a mediator to distinguish interference from target reflections, avoiding the need for complex identifying features in the radar signals themselves while still enabling reliable interference identification

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11852719B2Coordinated interference cleaning with known interferer location and timing

Publication Date: 2023.12.26 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. User equipment (UE), such as vehicles, may implement radar transmissions to detect and avoid potential collisions with a target such as other UE or pedestrians. A first UE may receive an indication of a location of a second UE and an indication of one or more parameters associated with radar transmission from the second UE. The first UE may also receive a radio frequency waveform that includes a first component associated with the radar transmissions from the second UE and a second component that is associated with reflected radar transmission from the first UE. The first UE may compensate for an interference from the first component based on the location of the second UE and the one or more parameters. The first UE may generate a radar image from the received radio frequency waveform based on compensating for the interference.