V2X Transceiver Radar Functionality
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Solution Overview
Problem
Current V2X communication systems exclude road users without transceivers supporting the standard, as they cannot be detected or communicated with, limiting their inclusion in vehicle safety systems.
Innovation Solution
A radio transceiver that transmits both data and dummy signals, enabling communication and ranging with transceiver-equipped targets while also detecting non-equipped targets through backscattered signals, using OFDM or SC-FDM signals, and dynamically allocating resource blocks based on radar performance requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V2X communication systems only communicate with transceiver-equipped targets, then communication reliability is improved, but detection capability for non-equipped targets deteriorates
Solution Approach 1:
The transceiver is designed to perform multiple functions: it acts as both a communication device for transceiver-equipped targets and a radar device for detecting non-equipped targets. By transmitting dummy signals and detecting backscattered signals, the same hardware enables both communication and radar functionality, resolving the contradiction between communication reliability and detection capability.
2Measurement precision
If dummy signals are transmitted continuously for radar functionality, then ranging capability is improved, but system interference increases
Solution Approach 1:
Instead of continuous transmission, the system transmits dummy signals periodically or in specific time slots. This periodic transmission maintains ranging capability while reducing overall system interference compared to continuous transmission, as the signals are sent only when needed for radar measurements.
Solution Approach 2:
The system obtains time-frequency resource assignments for dummy signal transmission from a central coordinating entity before transmission occurs. This preliminary coordination ensures that dummy signals are transmitted in pre-planned time slots, reducing random interference and allowing other systems to anticipate and manage the interference patterns.
3Measurement precision
If resource blocks are allocated dynamically based on radar performance requirements, then radar accuracy is improved, but system complexity increases
Solution Approach 1:
The system dynamically allocates resource blocks based on current radar performance requirements rather than using fixed allocations. This allows the system to adapt resource distribution to actual needs, improving radar accuracy when required while potentially reducing resource usage when high precision is not needed, thus managing the complexity-performance tradeoff.
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 the inclusion of all road users in vehicle safety systems by providing ranging capability to non-equipped targets and reducing system interference through coordinated dummy signal transmissions, enhancing safety and accuracy in V2X communication.
Implementation Method 1
a detector for detecting backscattered radio signals in the transmit frequency band
Data Source
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AI summary
A radio transceiver for communicating with one or more transceiver equipped targets, the transceiver comprising; a transmitter for transmitting radio signals in a transmit frequency band, wherein the transmitter is arranged to transmit a data signal in case a transceiver equipped target is present and to transmit a dummy signal in case a transceiver equipped target is not present, a receiver for receiving radio signals in a receive frequency band, and a detector for detecting backscattered radio signals in the transmit frequency band, wherein the detector is arranged to estimate a distance to at least one target object based on the backscattered radio signals.