Discrete Signal Synchronization Using DWT-SVD Bit Pattern Embedding
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Solution Overview
Problem
Conventional discrete signal synchronization methods often result in changes to signal characteristics due to the insertion of synchronization patterns, leading to inaccurate synchronization and poor signal processing quality, especially after signal modifications such as upsampling or downsampling.
Innovation Solution
A discrete signal synchronization system that employs Discrete Wavelet Transformation (DWT) and Singular Value Decomposition (SVD) to embed a known bit pattern into the signal without altering its characteristics, allowing for accurate synchronization of preprocessed and modified signals by comparing extracted bit patterns with the original pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a synchronization pattern is inserted into the signal to achieve synchronization, then synchronization capability is improved, but signal characteristics are altered leading to poor synchronization accuracy
Solution Approach 1:
The patent introduces a known bit pattern as an intermediary element that is embedded into the signal using DWT-SVD transformation. This known bit pattern serves as a mediator between the original signal and the synchronization process, allowing accurate detection of synchronization points without directly inserting traditional synchronization patterns that would alter signal characteristics. The known bit pattern is embedded in the singular values obtained through SVD, enabling reliable synchronization while preserving signal integrity.
2Reliability
If traditional synchronization patterns are used, then synchronization can be achieved, but signal distortion and noise are introduced
Solution Approach 1:
The patent replaces the traditional mechanical approach of inserting synchronization patterns with a mathematical transformation approach using DWT-SVD. Instead of directly inserting patterns into the time-domain signal, the method transforms the signal into the wavelet domain, embeds the known bit pattern in the singular values, and then reconstructs the signal. This substitution eliminates the harmful effects of direct pattern insertion while maintaining synchronization functionality.
Solution Approach 2:
The patent changes the domain in which synchronization information is embedded, transitioning from time-domain pattern insertion to embedding in the singular value domain through SVD. By modifying the parameter space where synchronization data is stored (from time-domain amplitudes to singular values), the method achieves synchronization without introducing distortion or noise to the original signal characteristics.
3Adaptability or versatility
If signal processing operations such as downsampling or upsampling are performed, then signal modification is achieved, but synchronization accuracy deteriorates
Solution Approach 1:
The patent performs preliminary embedding of the known bit pattern into the signal using DWT-SVD before any subsequent signal processing operations such as downsampling or upsampling. By establishing the synchronization marker in advance at the singular value level, the method ensures that even after signal modification operations, the known bit pattern remains detectable and accurate for synchronization, preventing deterioration of synchronization accuracy.
Data Source
AI summary
Systems and methods for discrete signal synchronization based on a known bit pattern are described. In one aspect of the present subject matter, a discrete signal synchronization system is configured to synchronize a preprocessed discrete signal with a modified discrete signal. The system comprises a processor and a synchronization module coupled to the processor. The synchronization module comprises an extraction module and comparison module. The extraction module determines a bit pattern from the modified discrete signal using Discrete Wavelet Transformation (DWT) and Singular Value Decomposition (SVD). The comparison module compares the determined bit pattern with a known bit pattern of the preprocessed discrete signal and records a time point at which the determined bit pattern matches with the known bit pattern of the preprocessed discrete signal as a synchronization point.