Unified Interleaver for Unequal RU Modulation Mapping
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently interleaving information bits of resource units (RUs) using different modulation and coding schemes, leading to suboptimal channel capacity and communication performance.
Innovation Solution
Implementing a unified interleaver with multiple interleavers that can handle information bits of RUs with varying modulation and coding schemes, simplifying hardware structure and reducing costs by using a combination of hardware and software modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single interleaver is used to process information bits of multiple RUs with different MCS, then device complexity is reduced, but the ability to handle unequal modulation schemes deteriorates
Solution Approach 1:
The patent designs a unified interleaver that can process information bits for multiple RUs with different modulation and coding schemes through a single device. The interleaver achieves multi-functionality by using configurable parameters (N_row, N_col, N_rot) that can be adjusted based on the specific RU and MCS configuration, allowing one interleaver to replace multiple specialized interleavers while maintaining adaptability to different modulation schemes.
2Adaptability or versatility
If multiple specialized interleavers are used for different MCS configurations, then adaptability to different modulation schemes is improved, but hardware structure complexity increases
Solution Approach 1:
The patent merges the functionality of multiple specialized interleavers into a single unified interleaver structure. By combining the processing capabilities for different MCS configurations into one device with configurable parameters, the solution eliminates the need for separate interleavers for each modulation scheme, thereby reducing hardware complexity while preserving adaptability through parameter configuration.
3Ease of manufacture
If traditional interleaving methods are used for unequal modulation, then implementation simplicity is maintained, but channel capacity and communication performance deteriorate
Solution Approach 1:
The patent optimizes channel capacity and communication performance by dynamically adjusting the interleaver parameters (N_row, N_col, N_rot) based on the specific RU configuration and MCS. This parameter adaptation enables the system to achieve better performance for unequal modulation schemes while maintaining implementation simplicity through a unified interleaver structure that uses standardized processing with configurable parameters.
Data Source
Figure 1~2A
Figure 2B
Figure 2C
AI summary
Embodiments of this application disclose an interleaving method supporting unequal modulation, a subcarrier mapping method supporting unequal modulation, and a related apparatus. An interleaver includes a first interleaver and a second interleaver, the interleaver is configured to determine an order of information bits carried in a subcarrier of a first RU and a subcarrier of a second RU, and a modulation scheme of the first RU is different from a modulation scheme of the second RU. The first interleaver is configured to input information bits by row. A quantity of columns of the first interleaver is M1+M2, a quantity of rows of the first interleaver is a larger value in N1 and N2, N1 and M1 are determined based on a quantity of subcarriers of the first RU, and N2 and M2 are determined based on a quantity of subcarriers of the second RU. The second interleaver is configured to receive the information bits that are output by the first interleaver by column, and perform interleaving mapping on the information bits. According to the interleaver provided in embodiments of this application, information bits of a plurality of RUs using different modulation and coding schemes can be interleaved, to simplify a hardware structure of a communication apparatus.