Radar Waveform Offset Coordination for Ghost Object Filtering
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Solution Overview
Problem
Radar interference between multiple radar transmitters in vehicles leads to false object detection, causing ghost objects and obscuring real objects, which affects safety and efficiency in wireless communications systems.
Innovation Solution
Implementing offset values for radar waveforms transmitted by different radar transmitters to mitigate interference, using time or frequency offsets, or a combination of both, to filter out ghost objects and improve object detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple radar transmitters transmit radar waveforms simultaneously, then object detection coverage is improved, but interference between transmitters causes false object detection
Solution Approach 1:
The patent applies periodic action by implementing time-offset transmission schedules for multiple radar transmitters. Each transmitter operates in periodic intervals with specific time offsets from other transmitters, allowing the radar system to maintain continuous surveillance coverage while avoiding simultaneous transmissions that cause interference. This periodic operation pattern enables ghost object filtering through consistent temporal separation of radar waveforms from different transmitters.
Solution Approach 2:
The patent applies parameter changes by modifying transmission timing parameters (time offsets) and frequency parameters for different radar transmitters. By dynamically adjusting these parameters, the system optimizes the balance between maintaining comprehensive object detection coverage and minimizing interference between multiple transmitters, thereby resolving the contradiction between detection accuracy and interference reduction.
2Object-affected harmful factors
If radar waveforms are transmitted with offset values, then interference is reduced, but transmission coordination complexity increases
Solution Approach 1:
The patent applies self-service by implementing automated offset value determination and transmission coordination mechanisms. The radar system autonomously calculates appropriate time and frequency offsets for each transmitter based on their spatial relationships and operational parameters, eliminating the need for manual coordination. This self-configuring capability reduces transmission coordination complexity while maintaining effective interference mitigation through consistent offset application.
Solution Approach 2:
The patent applies feedback by implementing monitoring mechanisms that detect interference levels and ghost objects, then automatically adjust transmission offset parameters in response. This closed-loop control system continuously optimizes the balance between interference reduction and coordination complexity by learning from operational experience and adapting offset values to maintain optimal performance without requiring increased system complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) (e.g., a vehicle) may determine a configuration, including an offset value for the radar waveform, for transmitting a radar waveform for multiple radar transmitters. The UE may transmit, according to the identified configuration, a first instance of the radar waveform with a first radar transmitter. The UE may also transmit a second instance of the radar waveform with a second radar transmitter. The second instance of the radar waveform may be offset from the first instance of the radar waveform by the offset value. The Offset value may be a time offset, a frequency offset, or both. The UE may identify at least one object, and may filter our interference between the first instance of the radar waveform and the second instance of the radar waveform based on the offset.