UWB Radar M-Sequence Authentication for Secure Localization
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Solution Overview
Problem
Existing localization systems face challenges in providing secure and efficient localization with high resolution, while maintaining low complexity and robustness against interference, especially in IoT applications.
Innovation Solution
The use of ultra-wideband (UWB) radar devices that employ M-sequences for generating and correlating radar signals, enabling secure localization and authentication through challenge-response schemes, thereby eliminating the need for additional communication systems like Bluetooth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar transceivers use short pulses or wide-frequency sweeps along with communication systems like Bluetooth for data exchange, then secure localization and authentication capabilities are improved, but device complexity increases
Solution Approach 1:
The patent combines radar transceiver functionality with M-sequence based challenge-response authentication in a single integrated system. The radar device transmits challenges using M-sequences and authenticates responses without requiring separate Bluetooth communication hardware, thereby reducing system complexity while maintaining secure localization capabilities
Solution Approach 2:
The radar transceiver is designed to perform multiple functions: it serves as both a radar sensor for localization and an authentication system using M-sequence challenge-response protocols. This multi-functionality eliminates the need for additional dedicated communication systems, reducing overall device complexity while providing both secure localization and authentication
2Measurement precision
If M-sequences are used for generating and correlating radar signals, then measurement precision and resolution are improved, but computational complexity increases
Solution Approach 1:
M-sequences are pre-generated and stored in the radar device before operation. During localization, the device correlates received signals with these pre-computed M-sequences, avoiding the need for real-time generation and reducing computational complexity during critical measurement operations while maintaining high localization precision
3Reliability
If challenge-response schemes with M-sequences are implemented, then security and reliability are improved, but device complexity increases
Solution Approach 1:
The authentication system uses periodic M-sequence challenges where the radar device sends a challenge M-sequence, receives a response, and automatically authenticates based on correlation results. This periodic challenge-response mechanism provides robust security through mathematical correlation properties of M-sequences without requiring complex cryptographic processing or additional authentication hardware
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 UWB radar system achieves precise ranging and encryption, ensuring high-resolution localization and secure communication with resilience to interference, thus addressing the complexity and reliability issues in existing systems.
Implementation Method 1
a transmitter configured to generate a first radio signal by modulating a first carrier signal with a first M-sequence
Implementation Method 2
a receiver configured to receive a radio signal and correlate the received radio signal with a predetermined second M-sequence different from the first M-sequence
Data Source
AI summary
An ultra-wideband (UWB) radar device including a transmitter configured to generate a first radio signal by modulating a first carrier signal with a first M-sequence and transmit the first radio signal, a receiver configured to receive a radio signal and correlate the received radio signal with a predetermined second M-sequence different from the first M-sequence and a controller configured to authorize a predetermined control action in reaction to a determination, based on the correlation result, that a device has responded to the first radio signal with a second radio signal generated by modulating a second carrier signal with the second M-sequence.