Adaptive Signal Puncturing for Stable BER Across Word Lengths
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Solution Overview
Problem
In broadcasting communication systems, the link performance degrades due to noise, fading, and Inter-Symbol Interference (ISI), requiring techniques to enhance communication reliability and maintain performance irrespective of information word length, which existing error-correcting codes fail to achieve effectively.
Innovation Solution
A method for adaptively selecting the number of shortened and punctured bits based on the information word length by determining parameters A and B, which are used to calculate the number of puncture bits, allowing for dynamic adjustment of the code rate to maintain stable system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of shortened bits increases, then the code rate decreases and BER/FER performance improves, but the system cannot maintain consistent performance across different information word lengths
Solution Approach 1:
The patent implements dynamic adjustment of the number of shortened bits and punctured bits based on the information word length. The encoder adaptively selects shortening and puncturing parameters according to the actual input size, allowing the system to maintain optimal BER/FER performance across varying information word lengths rather than using fixed parameters
Solution Approach 2:
The patent changes the parameters of shortening and puncturing operations based on the information word length. By adjusting the number of shortened bits and punctured bits as variables rather than constants, the system achieves both improved reliability and adaptability across different transmission scenarios
2Productivity
If the number of punctured bits increases, then the code rate increases and data throughput improves, but the BER/FER performance deteriorates
Solution Approach 1:
The patent dynamically adjusts the number of punctured bits based on the information word length and channel conditions. This allows the system to optimize the balance between code rate (affecting throughput) and error correction capability (affecting reliability) for each specific transmission scenario
Solution Approach 2:
The patent modifies the puncturing parameter as a variable that changes with information word length. By making the number of punctured bits dependent on the input size, the system can achieve higher throughput when appropriate while maintaining acceptable error performance
3Device complexity
If fixed shortening and puncturing parameters are used, then the encoder structure is simple, but the system performance varies significantly with different information word lengths
Solution Approach 1:
The patent introduces dynamic parameter selection into the encoder without significantly increasing structural complexity. The encoder adaptively determines the number of shortened and punctured bits based on the information word length, maintaining performance stability across different input sizes
Solution Approach 2:
The encoder performs self-adjustment of shortening and puncturing parameters based on the input information word length. The system automatically selects appropriate parameters without requiring external control, maintaining both simplicity and performance consistency
Data Source
AI summary
An apparatus and a method for transmitting and receiving a signal in a communication system are provided. The method includes checking a type of the signal to be transmitted; determining a number of puncture bits according to the type of the signal; and puncturing an encoded signal to be transmitted according to the number of puncture bits.