Polar-Coded Modulation Mapping for Channel-State-Independent Bit Allocation
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Solution Overview
Problem
Conventional information bit determination methods for polar-coded modulation in 5G communication systems rely on channel state, leading to low flexibility and practicability.
Innovation Solution
A method for determining information bit sets for polar codes independent of channel state, using a mapping relationship table to allocate code rates based on channel capacity, reducing performance loss and improving flexibility and practicability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional information bit determination method depending on signal-to-noise ratio is used, then the method can achieve channel state dependent optimization, but the flexibility and practicability are insufficient
Solution Approach 1:
The patent pre-calculates and stores mapping relationship tables containing code rate information for different MCS indices and modulation orders before actual communication. This preliminary action eliminates the need for real-time channel state dependent calculations, providing flexible code rate selection while maintaining performance through pre-optimized mapping relationships.
Solution Approach 2:
The patent changes the determination parameters from signal-to-noise ratio dependent to MCS index and modulation order based. By using the formula Kb = Ks × Rb × (Qm/4), where Kb is information bit quantity, Ks is code block size, Rb is code rate from mapping table, and Qm is modulation order, the system achieves flexible parameter adaptation without channel state dependency.
2Ease of operation
If channel state dependent method is used for information bit determination, then optimization can be achieved under specific conditions, but the method becomes complex and less practical
Solution Approach 1:
The patent pre-calculates mapping relationship tables containing code rate information for different MCS indices and modulation orders before actual communication. This preliminary action eliminates the need for real-time channel state dependent calculations, simplifying the system while maintaining flexibility in code rate selection.
Solution Approach 2:
The patent uses pre-generated mapping relationship tables that copy optimized code rate configurations for different MCS indices. Instead of performing complex real-time calculations, the system directly references these pre-computed tables, significantly reducing system complexity while maintaining practicality.
3Adaptability or versatility
If polar-coded modulation scheme is designed to be independent of channel state, then flexibility is improved, but achieving optimal performance becomes more difficult
Solution Approach 1:
The patent uses the formula Kb = Ks × Rb × (Qm/4) to calculate information bit quantities, where Rb (code rate) is selected from pre-stored mapping tables based on MCS index and modulation order. This parameter change approach maintains performance optimization by using pre-calculated optimal code rates while achieving channel state independence and improved flexibility.
Solution Approach 2:
The patent pre-calculates and stores optimal code rate values in mapping relationship tables for different MCS indices and modulation orders. This preliminary optimization ensures that when the system operates independently of channel state, it still achieves near-optimal performance by referencing these pre-computed values rather than requiring real-time channel measurements.
Data Source
AI summary
An information bit determination method and a mapping relationship generation method for polar-coded modulation, and devices thereof are provided. The information bit determination method includes: providing a mapping relationship table for a predefined polar-coded modulation scheme, the mapping relationship table at least including target rates, modulation orders and first parameters of a polar code/component code under different MCS indices; determining the quantity of information bits in each polar code/component code in a target polar-coded modulation system in accordance with the mapping relationship table; and determining an information bit set corresponding to each polar code/component code in accordance with the quantity of information bits in each polar code/component code in the target polar-coded modulation system, the information bit set being used to indicate a set of positions of the information bits. According to the present application, a mapping relationship generation method and an information bit determination method for polar-coded modulation are provided independent of a channel state, so it is able to improve the flexibility and the practicability of the polar-coded modulation scheme.