Multi-STA Sensing Resolution via Bandwidth Aggregation
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Solution Overview
Problem
Current joint radar and communication systems face challenges in discriminating between closely spaced objects due to correlated CSI, RSS, and ToF metrics, limiting the number of detectable objects and resolution in sensing applications.
Innovation Solution
The method involves multiple sensing responders and bandwidth aggregation to enhance sensing resolution, where a sensing initiator requests participation from devices to transmit and receive signals, coordinating beamforming and resource allocation to improve discrimination between closely spaced objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple STAs are used for sensing, then sensing resolution and object discrimination capability improve, but system complexity and coordination overhead increase
Solution Approach 1:
The sensing system is segmented into distinct functional roles: sensing initiator, sensing responders, and transmit responders. Each STA is assigned a specific role based on its capabilities and the sensing requirements, allowing complex multi-STA sensing to be broken down into manageable, coordinated segments with clear responsibility division.
Solution Approach 2:
The patent introduces a new dimension of sensing capability by enabling STAs to participate in sensing procedures beyond traditional radar-communication systems. Multiple STAs contribute sensing measurements from different spatial and functional perspectives, creating a multi-dimensional sensing approach that enhances resolution while distributing system complexity across multiple independent nodes.
2Measurement precision
If bandwidth aggregation is implemented, then sensing resolution improves, but signal processing complexity and computational requirements increase
Solution Approach 1:
Bandwidth aggregation is implemented by segmenting the total bandwidth into multiple sub-bands, with different STAs transmitting and receiving signals on different sub-bands. This segmentation allows each STA to process a manageable portion of the spectrum while collectively achieving high-resolution sensing through the aggregated bandwidth of all participating STAs.
Solution Approach 2:
The sensing initiator acts as an intermediary that coordinates bandwidth allocation among multiple responders. It manages the complex signal processing by collecting measurements from multiple STAs, aggregating the data, and performing the final high-resolution sensing computation, thereby distributing computational complexity rather than concentrating it in a single device.
3Measurement precision
If beamforming is coordinated across multiple STAs, then object discrimination capability improves, but coordination overhead and communication requirements increase
Solution Approach 1:
Beamforming is segmented and distributed across multiple STAs, with each STA performing beamforming independently on its assigned sub-band and spatial sector. This segmentation reduces coordination overhead by allowing autonomous beamforming operations at each STA while maintaining coherent multi-STA beamforming through standardized measurement reporting and aggregation at the sensing initiator.
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 allows for accurate identification and discrimination of closely spaced objects by improving sensing resolution and bandwidth usage, overcoming the limitations of correlated metrics in existing systems.
Implementation Method 1
performing the sensing procedure as the transmit responder by transmitting beamformed signals
Data Source
AI summary
Methods and apparatuses for sensing a cluster of closely-spaced objects are described herein. A method implemented in a first station (STA) may include receiving, from a second STA, a multicast message including information indicating a request for one or more STAs to participate in a sensing procedure and information indicating one or more sensing parameters. The method may include transmitting, to the second STA, an indication that the first STA is capable of participating in the sensing procedure based on the one or more sensing parameters, the indication including information associated with a participation ability of the first STA. The method may include receiving, from the second STA, configuration information for performing the sensing procedure sensing as a transmit responder based on the information associated with the participation ability of the first STA, and performing the sensing procedure as the transmit responder by transmitting beamformed signals.