LDPC Parity Interleaving for Variable-Length Signaling Robustness
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Solution Overview
Problem
Current channel encoding and modulation techniques for signaling information in broadcast systems lack robustness and efficiency, necessitating the development of new methods optimized for signaling information transmission.
Innovation Solution
A parity interleaving apparatus and method that segment and group-wise interleave parity bits of an LDPC codeword, optimizing puncturing and interleaving based on specific sequences and code rates to enhance transmission efficiency for signaling information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional channel encoding and modulation techniques are used for signaling information transmission, then the system maintains simplicity and compatibility with existing standards, but the transmission robustness and efficiency are insufficient
Solution Approach 1:
The parity bits of the LDPC codeword are segmented into multiple groups, and each group is independently interleaved using different interleaving orders. This segmentation allows the system to enhance transmission robustness through diversified interleaving patterns while maintaining manageable complexity by processing each group separately rather than treating the entire parity bit sequence as a single unit.
2Adaptability or versatility
If the amount of signaling information varies, then the system achieves flexibility in information transmission, but the optimization of shortening and puncturing becomes more difficult
Solution Approach 1:
The interleaving order is dynamically adjusted based on the amount of signaling information to be transmitted. When the information amount varies, the system selects appropriate interleaving orders from a set of predefined sequences, enabling adaptive optimization of shortening and puncturing operations without requiring complex real-time calculations, thus maintaining flexibility while controlling complexity.
3Productivity
If group-wise interleaving with specific sequences is applied to parity bits, then the transmission efficiency for signaling information is enhanced, but the processing complexity increases
Solution Approach 1:
Multiple interleaving order sequences are pre-defined and stored in the system before actual transmission occurs. During operation, the appropriate pre-defined sequence is selected based on the transmission conditions and information amount, avoiding the need for complex real-time sequence generation. This preliminary preparation enhances transmission efficiency while keeping processing complexity manageable during actual operation.
Data Source
AI summary
A parity interleaving apparatus and method for variable length signaling information are disclosed. A parity interleaving apparatus according to an embodiment of the present invention includes a processor configured to generate a parity bit string for parity puncturing by segmenting parity bits of an LDPC codeword whose length is 16200 and whose code rate is 3/15, into a plurality of groups, and group-wise interleaving the groups using an order of group-wise interleaving; and memory configured to provide the parity bit string for parity puncturing to a parity puncturing unit.