UE-Assisted Bistatic Radar Sensing for Self-Interference Reduction
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Solution Overview
Problem
Conventional monostatic radar configurations in wireless communication systems suffer from high self-interference, degrading full-duplex operations and impacting radar sensing accuracy.
Innovation Solution
Employing a user equipment (UE) as a radar-receiver and a network entity as a radar-transmitter for bistatic radar sensing, with assistance from each other to perform radar operations, using radar assistance configuration messages to facilitate combined radar and communication signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If monostatic radar configuration is used, then radar sensing can be performed within a single transceiver, but self-interference from radar-transmitter to radar-receiver degrades full-duplex operations and impacts radar sensing accuracy
Solution Approach 1:
The patent introduces a communication signal as an intermediary to separate the radar transmitter and receiver functions. By using a communication signal transmitted from the network entity and received by the UE, the system eliminates direct self-interference while enabling bistatic radar sensing operations.
Solution Approach 2:
The patent segments the radar functionality by separating transmission and reception into different devices (network entity for transmission, UE for reception). This segmentation allows independent optimization of transmit and receive operations, eliminating the self-interference problem inherent in monostatic configurations.
2Productivity
If full-duplex operations are employed in monostatic radar, then simultaneous transmission and reception can occur, but self-interference from radar-transmitter to radar-receiver degrades system performance
Solution Approach 1:
The communication signal serves as a mediator that enables full-duplex operations without self-interference. The network entity transmits the communication signal while the UE receives it, allowing simultaneous transmit and receive operations in a bistatic configuration that eliminates the harmful self-interference effect.
Solution Approach 2:
The patent converts the potential harm of self-interference into a benefit by using the communication signal path as the radar signal path. The communication signal, which would normally be separate, is now utilized as the radar waveform, transforming the communication infrastructure into a beneficial resource for radar sensing.
3Adaptability or versatility
If communication information is added to radar signal, then combined radar and communication signal can be transmitted, but communication information may be lost due to self-interference in monostatic systems
Solution Approach 1:
The patent uses the communication signal as an intermediary carrier that can accommodate both radar and communication information. By transmitting the communication signal from the network entity and receiving it at the UE, the system enables simultaneous radar sensing and communication without information loss, as the communication signal path is separate from the radar receive path.
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
Reduces high self-interference and enhances radar sensing accuracy by overcoming limitations of monostatic systems, enabling effective bistatic radar sensing.
Implementation Method 1
The network entity transmits a radar signal which reflects from an object to the UE
Data Source
AI summary
This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for bistatic radar assistance sensing. A radar-receiver receives (210), from a radar-transmitter, a configuration message that configures the radar-receiver to assist the radar-transmitter with bistatic radar sensing. The radar-receiver receives (214) a reflection of the radar signal. Responsive to the receiving the reflection of the radar signal, the radar-receiver transmits (218), to the radar-transmitter, a radar measurement report message. The radar-receiver receives (202), from the radar-transmitter, a radar capability enquiry. The radar-eceiver transmits (204), to the radar-transmitter in response to the radar capability enquiry, a radar capability response that indicates radar capabilities supported by the radar-receiver for the bistatic radar sensing.