UWB Pulse Processing with Secure Training Sequence Insertion
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Solution Overview
Problem
The existing IEEE 802.15.4 standard for Ultra-Wideband (UWB) communication systems is vulnerable to attacks such as preamble injection and Early Detect, Late Commit (EDLC) attacks, lacks flexibility in link budget adjustment, and is inefficient for short frames and secure channel tracking, leading to security and performance issues in applications like automotive Passive Keyless Entry systems.
Innovation Solution
A processing module for transmitter and receiver devices that generates and processes frames with a Secure Training Sequence (STS) and adaptive data-rate selection, using binary synchronization symbols and convolutional encoding to enhance channel estimation security and efficiency, and includes features like pilot-symbol insertion and error correction to improve channel impulse response tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization symbols are used for channel estimation in UWB systems, then time and frequency synchronization can be achieved, but the system becomes vulnerable to preamble injection and EDLC attacks
Solution Approach 1:
The patent extracts the harmful synchronization symbols from the packet structure and replaces them with secure training sequences that are authenticated between transmitter and receiver. This removes the vulnerability point that attackers could exploit while maintaining the necessary synchronization and channel estimation functions.
Solution Approach 2:
The patent introduces authenticated training sequences as an intermediary between the transmitter and receiver, replacing the vulnerable synchronization symbols. These training sequences serve as a secure mediator that enables channel estimation without exposing the system to preamble injection and EDLC attacks.
2Productivity
If standard UWB frames are used for communication, then basic data transmission is achieved, but performance is inefficient for short frames and secure channel tracking
Solution Approach 1:
The patent makes the frame structure dynamic by allowing flexible configuration of training sequence lengths and positions based on channel conditions and security requirements. This enables optimization for short frames while maintaining secure channel tracking, adapting the frame format to specific application needs rather than using fixed standard frames.
3Adaptability or versatility
If the IEEE 802.15.4 standard is used for UWB communication, then basic communication functionality is achieved, but link budget adjustment flexibility is limited
Solution Approach 1:
The patent changes key parameters of the frame structure, including training sequence length, position, and authentication mechanisms, to enable flexible link budget adjustment. By modifying these parameters while maintaining compatibility with the IEEE 802.15.4 framework, the system achieves adaptability without excessive complexity.
Data Source
AI summary
A processing module for a transmitter device configured to provide for generation of a signal comprising at least one frame for transmission by the transmitter device to a receiver device, the processing module configured to provide for processing of an input pulse stream comprising a stream of pulses representative of data, to provide an output pulse stream, each pulse of the pulse streams having one of two states defining the phase with which a carrier wave is modulated; the processing module configured to;divide the input pulse stream into consecutive groups of pulses; andfor each group of pulses, based on determination that the first two or more consecutive pulses of the group have the same polarity, provide for addition of at least one dummy pulse to the group directly after the first two or more consecutive pulses, with an opposite polarity.