Polar Code Bit Selection Under Puncturing Rate Matching
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Solution Overview
Problem
The selection of information bits in polar codes is affected by code length matching processes, leading to performance degradation in communication systems.
Innovation Solution
A method for determining information bits in polar codes by adjusting the reliability order using a first sequence, which is based on the mother code length and the length of the to-be-sent bit, to improve communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If code length matching is implemented in the puncturing manner, then code length can be adjusted to match actual communication requirements, but selection of information bit is affected and communication performance deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-determining the first sequence based on the mother code length and to-be-sent bit length before actual code construction. This sequence is used to adjust the reliability order of bits in advance, ensuring that information bit positions are optimally selected before puncturing occurs, thereby avoiding performance degradation while maintaining code length flexibility
Solution Approach 2:
The patent changes the parameter of reliability order by introducing a first sequence that adjusts the original reliability ordering of polar code bits. By modifying the reliability order parameter based on code length and information bit length, the system optimizes information bit selection to avoid performance bad points while maintaining adaptability to different code lengths
2Ease of operation
If information bit position is determined solely based on reliability order, then determination process is simple, but performance bad points occur and communication performance deteriorates
Solution Approach 1:
The patent modifies the reliability order parameter by applying a first sequence adjustment based on the position in the polar code and the length of to-be-sent bits. This parameter change transforms the original reliability order into an adjusted reliability order that avoids performance bad points while maintaining a relatively simple determination process
Solution Approach 2:
The first sequence acts as an intermediary between the original reliability order and the final information bit position selection. It mediates the determination process by providing adjustment values that modify reliability orders at specific positions, thereby improving performance without significantly complicating the overall selection process
Data Source
AI summary
This application provides a method for determining an information bit and an apparatus, to improve communication performance when polar code rate matching is performed in a puncturing manner. The method includes: determining a first sequence based on a mother code length of a polar code and a length of a to-be-sent bit, wherein the mother code length is a positive integer power of 2, and the first sequence is for adjusting a reliability order of bits in the polar code; and determining a position of an information bit in the polar code based on the reliability order and the first sequence.