UECS Joint Radar Processing to Reduce Self-Interference
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Solution Overview
Problem
Existing wireless communication systems face limitations in accurate object detection due to high self-interference in monostatic radar configurations, which degrade full-duplex operations, and single-user equipment setups are inefficient for bistatic and multi-static radar sensing.
Innovation Solution
Implementing a user-equipment-coordination set (UECS) where multiple UEs cooperate as radar-receivers, with a coordinating UE selecting participants based on capabilities, and performing joint radar processing using sidelink communication to enhance detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If monostatic radar configuration with full-duplex operations is used, then radar sensing can be performed, but high self-interference from radar-transmitter to radar-receiver degrades operation and negatively impacts sensing accuracy
Solution Approach 1:
The patent divides the radar receiving function across multiple UEs (user equipments) forming a coordinated set, where each UE receives radar signals from different spatial locations. This segmentation of the receiving function across distributed entities reduces self-interference from the radar transmitter, as the spatial distribution allows better interference management while maintaining sensing accuracy through coordinated processing of signals from multiple receivers.
2Measurement precision
If a single UE acts as radar-receiver for bistatic and multi-static radar sensing, then the radio cross-section of the object is increased, but the UE might not detect the radar reflection accurately because the reflection is weak
Solution Approach 1:
The patent combines the radar receiving capabilities of multiple UEs into a coordinated set that jointly processes radar signals. By merging the sensing functions of multiple individual receivers, the system achieves improved detection accuracy for weak radar reflections that a single UE could not detect reliably, while managing the complexity through coordinated resource allocation and signal processing.
3Measurement precision
If multiple UEs are coordinated for joint radar processing, then self-interference is reduced and sensing accuracy is improved, but system complexity increases due to coordination and capability management
Solution Approach 1:
The patent introduces a coordinating entity (which can be a network entity or a lead UE) that acts as an intermediary to manage the radar coordination among multiple UEs. This intermediary handles capability information collection, UE selection for the coordinated set, and resource allocation, thereby reducing the complexity burden on individual UEs while enabling the benefits of multi-UE coordinated radar processing.
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
The UECS approach reduces self-interference and improves radar sensing accuracy by leveraging distributed UE capabilities, enabling effective object detection and localization.
Implementation Method 1
a network entity (or another UE) may act as a radar-transmitter. In response to the transmitting of the radar signal, one or more of the UEs in the UECS may receive a reflection of a radar signal transmitted by the radar-transmitter
Implementation Method 2
one or more of the UEs in the UECS may receive a reflection of a radar signal transmitted by the radar-transmitter
Data Source
AI summary
This disclosure provides systems, devices, apparatus, and methods, including computer programs for a UECS. A coordinating UE (102e) receives (216C-216F), from a first UE (102f, 102g), of the UECS, first object detection information for a first radar signal reception. The coordinating UE (102e) obtains (216), from a second UE (102f, 102g) of the UECS, second object detection information for a second radar signal reception associated with a same transmitted radar signal as the first radar signal reception. The second object detection information is different than the first object detection information. The coordinating UE (102e) processes (218), at the coordinating UE (102e), the first object detection information together with the second object detection information to produce joint object detection information. The coordinating UE (102e) jointly transmits (220B), via the UECS, a radar report including joint object detection information of the UECS.