Hybrid Continuous-Wave Radar for Secure RF Sensing
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Solution Overview
Problem
Existing wireless communication systems face challenges in mitigating cross-node interference and ensuring secure and interference-robust radio frequency sensing, particularly in 5G networks, which affect target detection and sensing operations.
Innovation Solution
Implementing hybrid continuous-wave radar techniques that combine unscrambled and scrambled frequency modulation continuous wave (FMCW) waveform components in sensing reference signals, allowing for secure and interference-resistant RF sensing by segregating transmission durations or portions within symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scrambled continuous-wave waveform components are used in sensing reference signals, then cross-node interference is mitigated and security is improved, but signal processing complexity increases
Solution Approach 1:
The sensing reference signal is segmented into multiple continuous-wave waveform components, where at least one component is scrambled and at least one is unscrambled. This segmentation allows the system to process different components differently - scrambled components for interference mitigation and unscrambled components for simplified processing and target detection, thereby resolving the contradiction between interference mitigation and processing complexity.
Solution Approach 2:
Different portions of the sensing reference signal are assigned different qualities - some portions are scrambled to provide interference robustness and security, while other portions remain unscrambled to maintain processing efficiency. This local differentiation allows the system to optimize specific segments for particular functions rather than applying uniform processing to the entire signal.
2Reliability
If hybrid continuous-wave radar techniques are implemented, then secure sensing operations are enabled, but transmission protocol complexity increases
Solution Approach 1:
The transmission protocol is segmented to handle different waveform components differently. The protocol includes specific configurations for scrambled components (for security) and unscrambled components (for compatibility), allowing the system to implement secure sensing while maintaining manageable protocol complexity through structured differentiation.
Solution Approach 2:
The sensing reference signal structure is designed to be multi-functional, supporting both scrambled and unscrambled components within the same framework. This universality allows the system to perform multiple functions (secure detection, interference mitigation, and compatibility with existing systems) using a single integrated approach, reducing the need for separate protocols.
3Reliability
If scrambled waveform components are transmitted, then resistance to signal attacks is improved, but target detection performance may be degraded
Solution Approach 1:
The sensing reference signal is divided into scrambled and unscrambled waveform components. The unscrambled components are specifically designed for target detection to maintain measurement precision, while the scrambled components provide attack resistance. This segmentation ensures that each function is optimized independently without compromising the other.
Solution Approach 2:
The sensing reference signal uses a composite structure combining scrambled and unscrawbled components, analogous to composite materials in engineering. This composite approach allows the system to leverage the strengths of both component types - the security and attack resistance of scrambled signals and the detection performance of unscrawbled signals - creating a more robust overall system.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a sensing node may receive an indication to transmit a sensing reference signal (RS) having one or more scrambled continuous-wave waveform components. The sensing node may transmit a hybrid continuous-wave radar signal. In some case, the hybrid continuous-wave radar signal may comprise at least one unscrambled continuous-wave waveform component and at least one scrambled continuous-wave waveform component.