Polar Code Index Sequence for Multi-Rate Memory Reduction
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Solution Overview
Problem
The existing polar code designs for 5G mobile communication systems face challenges in supporting various code rates without increasing memory complexity, especially in storing index sequences optimized for different code rates, which leads to inefficient memory usage and performance degradation.
Innovation Solution
A method is proposed to generate a symmetrically-structured single index sequence of length 2N, which allows for code rate compatibility with low performance degradation, reducing memory complexity by storing only half of the sequence, thereby optimizing memory usage and maintaining high structured sequence performance across various code rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If index sequences optimized for different code rates are stored in advance, then code rate compatibility is improved, but memory complexity increases
Solution Approach 1:
The patent applies universality by designing a single index sequence that can serve multiple code rates. The symmetrically-structured sequence of length 2N is designed to be universally applicable across different code rates, allowing the same sequence structure to function for various coding scenarios without requiring separate stored sequences for each code rate.
Solution Approach 2:
The patent utilizes parameter changes by varying the code rate parameter while maintaining the same underlying index sequence structure. By changing how the fixed symmetric sequence is interpreted or applied rather than changing the sequence itself, the system achieves code rate compatibility without increasing memory storage requirements.
2Device complexity
If a symmetrically-structured single index sequence is used, then memory complexity is reduced, but performance degradation may occur
Solution Approach 1:
The patent applies asymmetry in a strategic manner by creating a symmetric structure that asymmetrically solves the memory problem. The symmetrically-structured sequence appears symmetric but is specifically designed to break the traditional pattern of storing multiple different sequences, thereby reducing memory complexity while maintaining performance through careful design of the symmetric pattern.
Solution Approach 2:
The patent segments the index sequence into a symmetric structure of length 2N that can be divided and applied across different code rates. This segmentation allows the single sequence to be effectively partitioned for different coding scenarios, maintaining performance while reducing the need to store multiple complete sequences.
3Adaptability or versatility
If multiple index sequences for different code rates are stored, then code rate adaptability is improved, but memory usage increases
Solution Approach 1:
The patent merges multiple code rate requirements into a single symmetrically-structured index sequence. Instead of maintaining separate sequences for different code rates, the invention combines these requirements into one unified sequence structure that can serve all code rates, thereby reducing memory usage while preserving adaptability.
Solution Approach 2:
The single symmetrically-structured sequence is designed to be universal across different code rates, allowing one sequence to perform the function of multiple sequences. This multi-functionality reduces the quantity of stored data while maintaining the ability to adapt to different code rate requirements.
Data Source
AI summary
The disclosure relates to a communication technique which fuses a 5G communication system with IoT technology to support higher data transmission rates after a 4G system, and system thereof. The disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart connected car, health care, digital education, retail, security, and safety related services, and the like) on the basis of 5G communication technology and IoT related technology. A transmission method is provided, the method including: identifying at least one bit for polar coding, identifying a first sequence having a length of 2N that corresponds to a length of the at least one information bit, encoding the information bit through the polar coding, and transmitting the encoded information.