Radar Controller Transmission Configurations for 5G Sensing
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Solution Overview
Problem
Current wireless communication systems, particularly in the 5G standard, face challenges in efficiently managing transmission configurations for reference radar signals and target radar signals, which affects the accuracy and efficiency of radar operations in environments with multiple targets and complex multipath scenarios.
Innovation Solution
A method is introduced to determine and transmit distinct transmission configurations for reference and target radar signals between base stations, utilizing a radar controller to manage beamforming and signal processing, enabling precise target detection and tracking in bistatic or multi-static radar systems within wireless communication networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single transmission configuration is used for both reference radar signal and target radar signal, then device complexity is reduced, but measurement precision deteriorates due to inability to optimize separately for communication and radar sensing functions
Solution Approach 1:
The patent segments the transmission configuration into two distinct configurations: a first transmission configuration for the reference radar signal and a second transmission configuration for the target radar signal. This segmentation allows each configuration to be independently optimized for its specific function, with the first configuration optimized for reference signal transmission and the second configuration optimized for target detection, thereby improving measurement precision without requiring complete system redesign
Solution Approach 2:
The patent implements multi-functionality by enabling the same wireless communication infrastructure (base stations, transceivers, frequency resources) to serve dual purposes: conventional wireless communication through the first transmission configuration and radar sensing through the second transmission configuration. This allows the system to perform both communication and radar functions using existing hardware, reducing the need for additional dedicated radar equipment
2Reliability
If distinct transmission configurations are determined and transmitted for reference and target radar signals, then target tracking accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts the radar-specific transmission configuration parameters from the conventional communication configuration framework. By identifying and separating the specific parameters needed for radar sensing (such as chirp parameters, sweep configurations, and range-Doppler processing parameters) from general communication parameters, the system can transmit only the necessary radar-specific information, reducing overall signaling overhead while maintaining target tracking accuracy
Solution Approach 2:
The patent implements feedback mechanisms where the radar controller receives target detection results and tracking performance information, then adjusts the second transmission configuration for target radar signals accordingly. This closed-loop feedback allows the system to optimize target tracking accuracy dynamically while minimizing signaling overhead by only transmitting configuration changes when necessary rather than continuously
3Productivity
If mmW RF signals are utilized for both wireless communication and radar sensing, then spectral efficiency is enhanced, but interference between communication and radar operations increases
Solution Approach 1:
The patent employs periodic action by implementing time-division multiplexing where the first transmission configuration for reference signals and the second transmission configuration for target radar signals are transmitted in alternating time slots or frames. This periodic structure allows the system to share the same mmW frequency resources for both communication and radar functions while minimizing interference through temporal separation, thereby enhancing spectral efficiency
Solution Approach 2:
The patent applies local quality by assigning different transmission parameters and signal characteristics to different time-frequency resources. The first transmission configuration uses parameters optimized for communication reference signals, while the second transmission configuration uses parameters optimized for radar sensing, with each configuration having locally optimized properties for its specific function. This allows coexistence of communication and radar operations on the same mmW spectrum with reduced mutual interference
Data Source
AI summary
In an aspect, a radar controller determines a first transmission configuration for a reference radar signal on a first link from a first base station to a second base station, and a second transmission configuration for at least one target radar signal on at least one second link from the first base station to the second base station, the at least one target radar signal for sensing of at least one target, the first transmission configuration being different than the second transmission configuration. The radar controller transmits the first and second transmission configurations to the first and second base stations. The first base station transmits the reference radar signal and the at least one target radar signal in accordance with the respective transmission configurations.