Vehicle Radar-Communication Integration via Time Gap Signal Segmentation
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Solution Overview
Problem
Current radar-communication integration solutions for vehicles, such as deriving radar functions from dedicated short-range communications (DSRC), face limitations in detection precision, communication efficiency, and delay, failing to meet the requirements of advanced assisted driving or unmanned driving.
Innovation Solution
A method involving a radar device that modulates communication messages into carrier signals within the radar operating band, using time gaps between radar signals to transmit messages, and employing a monolithic microwave integrated circuit (MMIC) to combine radar and communication signals in an alternate signal frame structure, ensuring independent operation of both functions and improving message transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radar function is derived from DSRC technology, then communication function is implemented, but detection precision of location and speed cannot exceed that of current vehicle-mounted radar sensor
Solution Approach 1:
The patent segments the signal transmission into distinct radar signal periods and communication time gaps. The radar device transmits radar signals in periodic intervals and utilizes the time gaps between these periods for communication message transmission. This segmentation allows independent optimization of radar detection precision while enabling communication functionality, resolving the contradiction between integration capability and detection precision.
Solution Approach 2:
The radar device operates with periodic radar signal transmission, creating regular time gaps between signal periods. These periodic time gaps are systematically utilized for communication message transmission. This periodic action structure ensures that radar detection maintains its precision while communication functions are embedded in the idle time slots, achieving both functions without compromising detection accuracy.
2Adaptability or versatility
If DSRC technology is used for radar-communication integration, then both radar detection and communication functions are implemented, but message transfer efficiency is low and delay is high
Solution Approach 1:
The radar device preliminarily establishes periodic time gaps in its signal transmission schedule, creating predefined communication windows before actual communication is needed. These pre-arranged time gaps eliminate communication setup delays and allow messages to be transmitted immediately when the time gap occurs, significantly improving message transfer efficiency while maintaining radar-communication integration.
3Adaptability or versatility
If communication messages are transmitted during radar signal periods, then communication function is achieved, but radar detection precision is degraded
Solution Approach 1:
The patent segments the overall signal transmission into distinct radar signal periods and communication time gaps. Radar signals are transmitted during dedicated radar periods while communication messages are transmitted during separate time gaps between these periods. This temporal segmentation prevents signal interference and allows each function to operate at its optimal performance level independently.
Solution Approach 2:
The radar device employs periodic radar signal transmission with regular intervals, creating predictable time gaps between signal periods. These periodic time gaps are specifically allocated for communication message transmission. This periodic structure ensures that radar detection precision is maintained during radar signal periods while communication functionality is achieved during the idle time slots, eliminating mutual interference.
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
This approach enhances radar detection precision and communication efficiency, reducing message delay and ensuring compatibility between radar detection and communication functions, thereby meeting the requirements of advanced assisted driving or unmanned driving and improving vehicle safety.
Implementation Method 1
modulating the first communication message into a first carrier signal, where an operating frequency of the first carrier signal is in an operating band of the radar device
Data Source
AI summary
A method for implementing radar-communication integration of a vehicle, where the method includes obtaining, by a radar device of a first vehicle, a first communication message, modulating the first communication message into a first carrier signal, where an operating frequency of the first carrier signal is in an operating band of the radar device, sending a periodic radar signal, and sending the first carrier signal to a second vehicle within a time gap between sending of a radar signal in a current period and sending of a radar signal in a next period.