Vehicle Radar Detection Association with Data Transmissions
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Solution Overview
Problem
Associating radar detections with received data transmissions in vehicular systems is challenging due to the passive nature of radar signals, which lack modulated information for identification, making it difficult to establish communication links with detected traffic objects.
Innovation Solution
A method in a vehicle radar system that compares ego-list and received-list radar detections based on range and Doppler values, using similarity criteria to associate radar detections with data transmissions, allowing for communication link establishment and improved vehicle maneuvering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If radar signals are transmitted passively without modulation, then the radar system can detect targets without requiring active counterparts, but it becomes difficult to identify the source of reflected signals and establish communication links
Solution Approach 1:
The patent introduces a third-party radar system as an intermediary to bridge the identification gap. The third-party radar detects the transmitting radar's signals and reports back identification information, allowing the original radar system to identify signal sources without modifying its passive transmission approach or requiring the target to be active
Solution Approach 2:
The patent divides the detection and identification functions into separate components: the primary radar system focuses on passive target detection while a separate identification module processes third-party radar reports to match detected targets with transmitter IDs, allowing each component to optimize for its specific function
2Use of energy by moving object
If radar and communication signals share the same waveform, then spectrum efficiency is improved, but the complexity of separating and processing radar detections from communication data increases
Solution Approach 1:
The patent uses a third-party radar system as an intermediary to perform the complex task of signal separation and target identification. Instead of the primary system attempting to separate its own radar returns from communication signals, the third-party radar independently detects and identifies targets, then reports findings back to the primary system
Solution Approach 2:
The patent creates a copy of the target detection information through the third-party radar system. The third-party radar generates its own detection list independently, which is then used to identify targets in the primary system's detection list, allowing the primary system to benefit from the shared waveform without bearing the complexity of signal separation
3Measurement precision
If processing delay compensation is implemented using Doppler values, then the accuracy of target range adjustment is improved, but the computational requirements increase
Solution Approach 1:
The patent changes the approach from calculating individual target range adjustments for each detection to using a single Doppler value derived from comparing detection lists. By adjusting the entire detection list based on one aggregate Doppler measurement, the system achieves compensation accuracy while reducing computational complexity compared to per-target calculations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate association of radar detections with data transmissions, enhancing communication links and improving vehicle maneuvering by compensating for processing delays and weighting differences in reliability, thus improving the robustness and accuracy of target-to-data associations.
Implementation Method 1
Electromagnetic energy transmitted from the radar transceiver passively 'bounces' off electromagnetically reflecting targets. These reflections are then received back at the transceiver, whereupon one or more target detections can be made.
Implementation Method 2
A radar transceiver is a device arranged for transmission and reception of radar signals in a radar frequency band.
Implementation Method 3
By basing the association on both range and Doppler the quality and robustness of the associations is improved.
Data Source
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AI summary
A method in a vehicle radar system (121) for associating a radar detection originating from a traffic object (101) with a data transmission (110) from the traffic object (101), the method comprising receiving (Sa1) the data transmission (110), the data transmission comprising a transmitter identification, ID, and a received list of radar detections generated by a radar transceiver associated with the ID, generating (Sa2) an ego list of radar detections by the vehicle radar system (121), comparing (Sa3) detections in the ego list of radar detections to detections in the received list of radar detections to determine differences between detections in the ego list of radar detections and detections in the received list of radar detections, and associating (Sa4) a first detection from the ego list of detections with the data transmission and/or to the ID in case a difference between the first detection and a detection from the received list of detections satisfies a similarity criterion.