Polar Code Sub-Block Interleaving for Unified Bit Selection
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Solution Overview
Problem
Current polar code interleaving and bit selection methods in wireless communication networks face inefficiencies due to large mother code sizes exceeding physical bit sizes, requiring rate matching and improved error correction performance.
Innovation Solution
Implementing middle-part interlaced sub-block interleaving for polar code interleaving and rate-dependent unified bit selection, categorized into repetition, puncturing, and shortening operations, with unified bit selection rules and access schemes, such as top-to-bottom, bottom-to-top, or combinations, to optimize bit sequence transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polar code is used for channel coding in wireless communication, then error correction performance is improved, but the mother code size N exceeds the physical code bit size requiring rate matching
Solution Approach 1:
The polar code bits are divided into multiple sub-blocks that are then interleaved. This segmentation allows the large mother code to be managed in smaller, more manageable units that can be selectively transmitted based on the required code rate, resolving the contradiction between maintaining error correction performance and managing code size.
Solution Approach 2:
The patent implements dynamic bit selection and rate matching mechanisms that adapt the transmitted code bits based on channel conditions and required data rates. This dynamic approach allows the system to maintain optimal error correction performance while efficiently managing the mother code size to match physical transmission constraints.
2Adaptability or versatility
If rate matching and bit selection are performed for polar code, then the code fits physical transmission constraints, but transmission efficiency decreases
Solution Approach 1:
The patent performs preliminary interleaving of polar code sub-blocks before rate matching and bit selection. This preliminary arrangement optimizes the distribution of important and less important bits, allowing more efficient selection during rate matching and reducing the loss of error correction performance, thereby improving transmission efficiency while maintaining adaptability.
3Reliability
If interleaving is applied to improve transmission quality, then error correction performance is enhanced, but processing complexity increases
Solution Approach 1:
The interleaving is applied to segmented sub-blocks of the polar code rather than the entire code block. This reduces the processing complexity of each interleaving operation while maintaining the error correction benefits through selective interleaving of critical bit segments.
Data Source
AI summary
Apparatus and methods are provided for polar code sub-block interleaving and bit selection. In one novel aspect, middle-part interlaced sub-block interleaving is provided for polar code interleaving. In one embodiment, the middle part of the polar code is interlaced and generates the interleaved polar code. In another embodiment, the lower part and the upper part are also sub-block interleaved with the middle-part interlaced method. In another novel, rate-dependent unified bit selection is provided. The bit selection is categorized into three operation categories of repetition, puncturing and the shortening. Each category follows unified bit selection rule with different categories differ only in the access scheme. In one embodiment, the circular buffer is used for bit selection.