Network-Coordinated Radar Transceiver Scheduling for Lower Interference
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Solution Overview
Problem
Existing vehicular radar systems face interference issues due to uncoordinated transmission in dedicated frequency bands, leading to inefficient spectral use as the number of radar transceivers increases, and there is a need for improved spectral efficiency.
Innovation Solution
A method where radar systems operate in conjunction with a wireless communication network, utilizing time-frequency resources allocated by the network to transmit both communication and radar signals, allowing for interference reduction and optimized resource use based on specific needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If uncoordinated FMCW transmission is used in dedicated radar frequency bands, then radar systems can operate independently without network coordination, but interference between multiple radar transceivers increases and spectral efficiency decreases
Solution Approach 1:
The patent introduces a wireless communication network as an intermediary mediator that coordinates radar transmissions. The network schedules time-frequency resources for multiple radar systems, preventing uncoordinated interference while maintaining independent radar operation. The network acts as a central coordinator that allocates resources without requiring direct radar-to-radar communication.
Solution Approach 2:
The patent enables the radar system to utilize communication network resources for dual purposes: both communication and radar functions. By allowing the radar to use allocated communication resources for radar transmissions, the system achieves multi-functionality, improving spectral efficiency without requiring dedicated radar-only frequency bands.
2Reliability
If the number of radar transceivers in the traffic environment increases, then better vehicle monitoring coverage is achieved, but spectral resources become insufficient and interference increases
Solution Approach 1:
The patent segments the available spectral resources into time-frequency resource blocks that are allocated by the wireless communication network. Each radar system receives specific time slots and frequency resources, dividing the limited spectral resources into manageable segments that can be distributed among multiple radar transceivers, thereby supporting increased vehicle monitoring coverage without spectral conflict.
Solution Approach 2:
The patent implements dynamic resource allocation where the network continuously adjusts time-frequency resource assignments based on current traffic conditions and radar requirements. This dynamic scheduling allows the system to adapt to varying numbers of radar transceivers and changing spectral conditions, optimizing resource utilization as the number of vehicles and radars increases.
Data Source
AI summary
A method for operating a radar system (210) in a vehicle (201), the method including establishing a wireless communication link (245) to a radio base station (250) in a wireless communication network (260), requesting a time-frequency resource (420, 430) for communicating with a network node (270) via the radio base station (250), receiving a transmission grant from the radio base station (250) for communicating with the network node (270) using the time-frequency resource (420, 430), transmitting a communications signal (245) in the time-frequency resource, and transmitting a radar signal (235) in the time-frequency resource.