Signal Modulation Layout for Phase Noise Compensation and Low PAPR
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Solution Overview
Problem
In high-frequency communication scenarios, phase noise and high peak-to-average power ratio (PAPR) pose challenges, leading to reduced spectral efficiency and increased power consumption, while conventional phase compensation methods fail to adequately address these issues.
Innovation Solution
A signal modulation method that separates control and data information using different modulation schemes, such as π/2-BPSK and 16-QAM, and inserts control information in specific patterns within data blocks to estimate phase noise and reduce PAPR, employing techniques like grouping and uniform insertion in time or frequency domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional phase compensation methods are used, then phase noise compensation is achieved, but spectral efficiency is reduced
Solution Approach 1:
The data block is segmented into multiple groups, with specific groups designated as control information groups for phase noise estimation and others as data groups for information transmission. This segmentation allows the system to achieve phase noise compensation while maintaining high spectral efficiency by minimizing the proportion of control groups.
Solution Approach 2:
Different groups within the data block are assigned different functions: control information groups use low-order modulation for reliable phase noise estimation, while data groups use high-order modulation for efficient information transmission. This local differentiation optimizes both phase noise compensation and spectral efficiency.
2Productivity
If high-frequency transmission is used, then communication capacity is increased, but phase noise becomes larger
Solution Approach 1:
Control information groups serve as intermediaries between the high-frequency transmission and the phase noise estimation process. These groups are specifically designed with low-order modulation to provide reliable phase noise estimates that can then be used to compensate for phase noise affecting the high-order modulation data groups, enabling high-frequency transmission despite increased phase noise.
3Measurement precision
If uniform insertion of control information is used, then phase noise estimation accuracy is improved, but PAPR increases
Solution Approach 1:
Instead of uniformly inserting control information groups throughout the entire data block (which would maximize estimation accuracy but increase PAPR), the method uses partial action by inserting control groups only at specific positions (e.g., first and last groups). This provides sufficient phase noise estimation accuracy while significantly reducing PAPR and improving power amplifier efficiency.
Data Source
AI summary
Provided are a signal modulation method and device, and a storage medium. The method includes: generating a first bit sequence and a second bit sequence; modulating the first bit sequence with a first modulation scheme to obtain a corresponding modulation symbol including control information; and modulating the second bit sequence with a second modulation scheme to obtain a corresponding modulation symbol including data information.