Multi-Segment RF Sensing Signals for Range and Velocity Detection
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently determining the velocity and range of target objects while avoiding ghost objects and achieving higher spectrum efficiency, particularly in the context of 5G and beyond systems that integrate communication and RF sensing.
Innovation Solution
A sensing signal configuration is employed with segments of monotonically increasing, decreasing, and changing frequencies over different time lengths, allowing for the determination of target object velocities and ranges using a single waveform pattern without repeated transmissions, and enabling simultaneous communication through frequency division multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single-segment sensing signal is used, then the signal transmission is simple, but the accuracy in determining velocity and range is insufficient and ghost objects cannot be avoided
Solution Approach 1:
The sensing signal is divided into multiple segments including a first segment with monotonically increasing frequency, a second segment with monotonically decreasing frequency, and a third segment with monotonically changing frequency. Each segment serves a specific function in resolving ambiguities and eliminating ghost objects, thereby improving measurement precision without requiring complex repeated transmission patterns.
2Measurement precision
If repeated transmission patterns are used to determine range and velocity, then measurement accuracy improves, but transmission time increases and spectrum efficiency decreases
Solution Approach 1:
The multi-segment sensing signal enables continuous determination of range and velocity within a single transmission pattern. The different frequency modulation segments allow simultaneous extraction of multiple measurement parameters, eliminating the need for repeated transmissions and reducing time loss while maintaining measurement accuracy.
3Measurement precision
If dedicated sensing bandwidth is allocated, then sensing accuracy is maintained, but spectrum efficiency decreases due to unused communication resources
Solution Approach 1:
The multi-segment sensing signal structure enables the same frequency bandwidth to serve both sensing and communication functions. By carefully designing the frequency modulation characteristics of each segment, the system can extract sensing information while allowing communication signals to be transmitted concurrently, thereby improving spectrum efficiency without sacrificing sensing accuracy.
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 determination of target object velocities and ranges while enhancing spectrum efficiency and supporting simultaneous communication, thereby improving the performance of integrated communication and RF sensing systems.
Implementation Method 1
a first segment of the sensing signal with a monotonically increasing frequency over a first length of time, indicating a second segment of the sensing signal with a monotonically decreasing frequency over a second length of time
Implementation Method 2
radar sensing, e.g., simultaneously. In a JCS, time/frequency/spatial radio resources are allocated to support two purposes (communication and sensing) in the integrated system. A JCS can improve cost efficiency for both radar and communication systems.
Data Source
AI summary
A radio frequency sensing method includes: obtaining, at an apparatus, a sensing signal configuration of a sensing signal in response to a request for radio frequency sensing, the sensing signal configuration indicating a first segment with a monotonically increasing frequency over a first length of time, indicating a second segment with a monotonically decreasing frequency over a second length of time, and indicating a third segment with a monotonically changing frequency over a third length of time that is shorter than the first length of time and the second length of time; and transmitting the sensing signal configuration from the apparatus, or transmitting the sensing signal from the apparatus, or transmitting the sensing signal configuration and the sensing signal from the apparatus, or receiving and measuring the sensing signal at the apparatus, or any combination of two or more thereof.