UWB Sensing Feedback Policy for Reliable Frequency Stitching
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Solution Overview
Problem
UWB devices with low costs and low power consumption are limited by the performance of analog-to-digital converters, preventing them from processing large-bandwidth UWB signals, and existing frequency stitching technologies lack reliability, limiting sensing performance in UWB systems.
Innovation Solution
A method and apparatus for UWB systems that utilize specific message content to define frequency stitching, including feedback policies and sending policies for sensing packets across multiple frequency bands, enhancing reliability and performance through coordinated sensing and frequency band management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If frequency stitching technology is used to enable low-cost UWB devices to process large-bandwidth signals, then device cost and power consumption are reduced, but reliability of frequency stitching is low and sensing performance is limited
Solution Approach 1:
The patent implements a feedback mechanism where the responder device sends feedback information to the initiator device indicating whether the current frequency band can be used for sensing. The initiator device adjusts the frequency band selection based on this feedback, creating a closed-loop system that improves reliability while maintaining low power consumption through frequency stitching
Solution Approach 2:
The patent makes the frequency band selection dynamic by allowing the system to adaptively choose and switch between different frequency bands based on real-time sensing requirements and device capabilities. This dynamic adjustment optimizes the balance between power consumption and sensing reliability
2Area of stationary object
If frequency stitching is implemented to achieve large bandwidth sensing, then sensing coverage is improved, but sensing precision is limited due to lack of specific frequency stitching solutions
Solution Approach 1:
The patent segments the large bandwidth into multiple smaller frequency bands that can be processed individually by low-cost ADCs. By stitching these segmented frequency bands together through coordinated sensing and feedback mechanisms, the system achieves both wide sensing coverage and maintained precision
Solution Approach 2:
The patent merges multiple frequency bands into a unified large-bandwidth sensing system through frequency stitching. The initiator and responder devices coordinate their sensing across multiple bands and combine the results, achieving enhanced sensing coverage while maintaining precision through the feedback-driven coordination mechanism
3Measurement precision
If multiple frequency bands are used for frequency stitching, then effective bandwidth is increased and sensing precision is improved, but device complexity increases due to ADC performance limitations
Solution Approach 1:
The patent introduces feedback information as an intermediary that mediates between the responder device and initiator device. This feedback mechanism coordinates the multi-band sensing process, allowing precise frequency stitching without requiring complex hardware modifications to the ADCs
Solution Approach 2:
The patent makes the feedback mechanism universal, allowing it to work across different frequency bands and device configurations. This single feedback-based approach handles multiple functions including frequency band selection, coordination, and precision optimization without increasing device complexity
Data Source
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AI summary
Embodiments of this application provide a sensing method and an apparatus, to implement sensing through frequency stitching. A second device sends a first message, and a first device receives the first message. The first message includes first information, the first information indicates a feedback policy for a sensing result corresponding to a plurality of frequency bands, and the plurality of frequency bands are used for frequency stitching. The first device sends a second message to the second device based on the first message. The second message includes a sensing result corresponding to at least one of the plurality of frequency bands. In this solution, reliability of implementing sensing through frequency stitching can be improved, and sensing performance of a UWB system can be improved.