Syncword Detection for Frame Alignment Reliability
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Solution Overview
Problem
Conventional data transmission methods experience high frame loss rates due to interference with correlation peaks during syncword detection, especially in long-distance transmissions where frame alignment information is not explicitly sent.
Innovation Solution
Inserting a preset number of syncwords with varying compositions or orders into data frames, allowing for cross-correlation detection and adjusting their positions based on handshake signals to ensure alignment, thereby reducing frame loss rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single syncword is inserted into transmitted data, then the data transmission process is simplified, but the correlation peak is easily interfered with and may not be detected, resulting in a high frame loss rate
Solution Approach 1:
The patent divides a single syncword into multiple syncwords (first syncword and second syncword) inserted at different positions in the data frame. This segmentation allows the system to detect at least one valid syncword even if some are interfered with, thereby improving frame detection reliability while maintaining relatively simple implementation
Solution Approach 2:
The patent applies different qualities to different syncwords by using distinct sequences for the first and second syncwords. This local differentiation ensures that if one syncword position experiences interference, the other may still be detected, improving overall detection reliability without significantly increasing system complexity
2Reliability
If multiple syncwords with different compositions or orders are inserted into data frames, then frame detection reliability is improved, but the complexity of syncword insertion and processing increases
Solution Approach 1:
The patent segments the syncword functionality into multiple instances (first syncword and second syncword) with different sequences or orders. This segmentation improves detection reliability by distributing the detection burden across multiple positions, while the segmented structure actually simplifies the overall insertion process compared to using a single complex syncword
Solution Approach 2:
The patent implements periodic insertion of syncwords at regular intervals in the data frame. This periodic structure provides a predictable pattern that simplifies the insertion process while ensuring that at least one syncword falls outside of interfered regions, thereby improving detection reliability without excessive complexity
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 method effectively reduces frame loss rates by ensuring at least one syncword is detected, allowing for accurate frame alignment and improved data transmission reliability.
Implementation Method 1
performing a cross-correlation process between each syncword of the preset number of syncwords and the data frame to be sent inserted with the preset number of syncwords
Data Source
AI summary
The present application provides a method, a device, a transmitter, and a receiver for detecting syncwords. After inserting syncwords in a data frame to be transmitted, a transmitter transmits the data frame to be transmitted inserted with a preset number of syncwords to a receiver. Because the bit-length of information in the data frame to be transmitted inserted with the preset number of syncwords is a specified multiple of the length of the syncwords, and the symbol components of the preset number of the inserted syncwords are different, or the symbol components are the same but the orders of the symbols are different, the receiver correlates each syncword of the preset number of syncwords with the data frame to be transmitted inserted with the preset number of syncwords after receiving the data frame to be transmitted.