LDPC Parity Puncturing With Group-Wise Interleaving for Signaling
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Solution Overview
Problem
Current channel encoding and modulation techniques for signaling information in broadcast systems lack robustness and efficiency, particularly in next-generation digital broadcasting systems.
Innovation Solution
A parity puncturing apparatus and method that optimizes channel encoding and modulation for signaling information transmission using LDPC codewords with a code rate of 3/15, involving parity bit string generation and puncturing, along with group-wise interleaving and zero padding, to enhance transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional channel encoding and modulation techniques are used for signaling information transmission, then the transmission can be performed with standard methods, but the robustness and efficiency of transmission are insufficient
Solution Approach 1:
The patent changes key parameters of the channel encoding and modulation techniques, specifically using LDPC codewords with code rate 3/15 and implementing optimized parity puncturing schemes. These parameter changes enable both improved transmission robustness through better error correction and maintained efficiency by optimizing the puncturing process for signaling information characteristics
Solution Approach 2:
The patent segments the parity bits into different groups and applies selective puncturing to different segments. This segmentation allows the system to preserve critical parity information while removing redundant bits, thereby achieving both robustness through preserved error correction capability and efficiency through reduced transmission overhead
2Quantity of substance
If the amount of signaling information is large, then more information can be transmitted, but the transmission efficiency decreases due to insufficient optimization
Solution Approach 1:
The patent implements dynamic parity puncturing where the puncturing pattern and degree are adjusted based on the actual amount of signaling information to be transmitted. When information amount is large, the system dynamically optimizes which parity bits to puncture, maintaining efficient transmission while ensuring sufficient error correction capability for the increased information load
3Reliability
If more parity bits are transmitted, then error correction capability is improved, but transmission overhead increases reducing efficiency
Solution Approach 1:
The patent extracts and removes redundant parity bits through selective puncturing while retaining the essential parity bits needed for error correction. By taking out only the necessary portion of parity information, the system achieves efficient transmission with reduced overhead while maintaining sufficient error correction capability for reliable signaling information delivery
Data Source
AI summary
A parity puncturing apparatus and method for fixed length signaling information are disclosed. A parity puncturing apparatus according to an embodiment of the present invention includes memory configured to provide a parity bit string for parity puncturing for the parity bits of an LDPC codeword whose length is 16200 and whose code rate is 3/15, and a processor configured to puncture a number of bits corresponding to a final puncturing size from the rear side of the parity bit string.