Signal Detection Masking for Code Rate Search Reliability
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Solution Overview
Problem
In digital communication systems, signal receivers face challenges in determining the code rate of signals due to complex and resource-intensive methods, as they cannot learn the code rate selected by the transmitter, leading to inaccuracies and high computation costs.
Innovation Solution
A signal detection method using a constellation diagram with a mask between adjacent points to filter out signals prone to misjudgment, allowing only signals outside the mask to be determined, thereby enhancing the reliability of code rate search by discarding ambiguous signals and focusing on those easily determinable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If decoding and comparison are performed using various possible code rates to determine the correct code rate, then the code rate can be determined, but the method becomes extremely complex and consumes large amounts of computation resources
Solution Approach 1:
The patent extracts and removes ambiguous signals that fall within mask regions from the constellation diagram. By excluding these uncertain signals from code rate determination, the system avoids complex decoding and comparison operations while maintaining accurate code rate detection using only the clear, unambiguous signals.
Solution Approach 2:
The patent changes the parameter of signal selection by introducing mask regions that dynamically exclude certain signal points based on their ambiguity. This parameter change transforms the approach from processing all signals through complex decoding to selectively processing only non-ambiguous signals, thereby reducing computational complexity.
2Quantity of substance
If all received signals are used for code rate determination, then more data is available for analysis, but signals located in mask regions cause misjudgment and reduce reliability
Solution Approach 1:
The patent extracts and removes signals located within mask regions from the analysis set. By taking out these ambiguous signals that would cause misjudgment, the system maintains code rate determination reliability while still utilizing the maximum number of reliable signals for accurate detection.
3Productivity
If signals in mask regions are included in determination, then more signals are processed, but misjudgment occurs leading to errors
Solution Approach 1:
The patent extracts and excludes signals within mask regions from the determination process. This removal of ambiguous signals prevents misjudgment and maintains high determination accuracy, while the system efficiently processes only the clear, unambiguous signals outside the mask regions.
Data Source
AI summary
A signal detection method associated with a constellation diagram corresponding to a modulation scheme is provided for enhancing the reliability of code rate search. A mask is provided between two adjacent constellation points in the modulation scheme. The signal detection method includes: receiving a plurality of signals, and mapping the plurality of signals to the constellation diagram; when a first signal among the plurality of signals is located in the mask, discarding the first signal; and when a second signal among the plurality of signals outside located in the mask, determining a constellation point corresponding to the second signal.