Irregular Modulation Constellation Diagram Design for BER and PAPR Optimization
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Solution Overview
Problem
Existing communication systems face challenges in designing modulation constellation diagrams that effectively balance bit error rate (BER) and peak-to-average power ratio (PAPR) across varying communication environments, leading to suboptimal data transmission rates and power consumption.
Innovation Solution
The use of irregular modulation constellation diagrams that are tailored to specific communication environments, allowing for flexible design and adaptation based on the location and type of terminal devices, including amplitude and phase adjustments, to achieve low BER and PAPR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a regular modulation constellation diagram is used, then the system is simple to implement, but the bit error rate and peak-to-average power ratio are suboptimal in varying communication environments
Solution Approach 1:
The patent applies asymmetry by transitioning from regular symmetric modulation constellation diagrams to irregular asymmetric constellation diagrams. The constellation points are strategically positioned with different amplitudes and phases to optimize performance in specific communication environments, particularly for devices with power amplifiers having limited linear ranges.
Solution Approach 2:
The patent implements local quality by tailoring the modulation constellation diagram to specific terminal device characteristics and communication scenarios. Different constellation diagrams are designed for different device types (e.g., devices with narrow vs. wide linear range power amplifiers), allowing each device to use a constellation diagram optimized for its local conditions rather than a universal design.
2Productivity
If an irregular modulation constellation diagram is designed to optimize BER and PAPR, then data transmission rate and power consumption improve, but the design complexity and signaling overhead increase
Solution Approach 1:
The patent applies dynamics by enabling the system to adaptively select different irregular modulation constellation diagrams based on communication conditions, device capabilities, and channel characteristics. The constellation diagram is not fixed but can be dynamically adjusted through indication information to match current operational requirements.
Solution Approach 2:
The patent implements parameter changes by modifying the amplitude and phase parameters of constellation points to create irregular constellation diagrams. These parameter adjustments optimize the distribution of constellation points to reduce peak-to-average power ratio while maintaining or improving bit error rate performance.
3Adaptability or versatility
If modulation constellation diagrams are customized for different terminal device types and communication scenarios, then communication performance improves, but the system complexity and configuration overhead increase
Solution Approach 1:
The patent applies universality by creating a framework that supports multiple irregular modulation constellation diagrams within a single system. The same indication mechanism can signal different constellation diagrams for different device types, communication scenarios, and channel conditions, making the system universally adaptable without requiring separate specialized systems.
Data Source
AI summary
Embodiments of this application provide data transmission methods and apparatuses. In an implementation, a method includes: determining information about a first modulation constellation diagram and communicating with a first device based on the first modulation constellation diagram, wherein the first modulation constellation diagram comprises M constellation points, and wherein the information about the first modulation constellation diagram comprises one of: a value range of M1 constellation points in the first modulation constellation diagram, wherein M1 is an integer greater than or equal to 1 and less than or equal to M; offsets of M1 constellation points in the first modulation constellation diagram relative to M1 constellation points in a reference modulation constellation diagram, wherein M1 is an integer greater than or equal to 1 and less than or equal to M; or a rotation phase of the first modulation constellation diagram relative to a reference modulation constellation diagram.