Polar Code Rate Matching for Flexible Satellite Packet Lengths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing polar codes in 5G communication systems are not fully applicable to satellite communication due to limited mother code lengths and complexity in encoding and decoding, making them unsuitable for data channels and short packet transmissions.
Innovation Solution
A polar code rate matching method that selects polarized sub-channels based on reliability rankings and performs rate matching operations using predefined sequences, simplifying the implementation and adapting to satellite communication characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If polar codes are used in satellite communication, then encoding and decoding complexity is reduced, but applicability to satellite communication requires additional design work
Solution Approach 1:
The patent adapts polar codes for satellite communication by modifying key parameters including mother code length (N) to support various packet sizes, code rate (R=K/N) to match satellite channel characteristics, and rate matching sequences to optimize performance under satellite communication constraints. These parameter adjustments enable polar codes to achieve both low complexity and high adaptability in satellite environments.
2Productivity
If polar codes are designed for specific mother code lengths, then encoding efficiency is improved, but flexibility for different packet lengths is reduced
Solution Approach 1:
The patent creates a universal polar code design that can handle multiple packet lengths by defining a family of rate matching sequences parameterized by mother code length N. The same encoding framework works for N=512, 1024, 2048, 4096, and 8192, allowing the system to maintain high encoding efficiency across different packet sizes without requiring separate code designs for each length.
Solution Approach 2:
The patent introduces dynamic rate matching sequences that can be selected and configured based on the specific packet length and code rate requirements. The rate matching parameter M (target code length) dynamically adjusts the output sequence length, enabling the same polar code structure to adapt to varying packet lengths while maintaining optimal encoding efficiency through pre-defined rate matching patterns.
Data Source
AI summary
The present disclosure relates to polar code rate matching methods, apparatuses, and mediums. One example method includes obtaining K to-be-coded bits and a mother code length N, where N=2n performing polar code encoding on the K to-be-coded bits based on the mother code length N to obtain an encoded bit sequence, performing rate matching on the polar-encoded bit sequence based on a rate matching sequence to obtain a rate matched sequence with a length of M, and outputting the rate matched sequence.