基于感知-自适应调整-执行的OFDM信号三级联合PAPR抑制算法研究
A Perception-Adaptive Adjustment-Execution-Based Three-Stage Joint PAPR Reduction Algorithm for OFDM Signals
韩庆奇 1张敏1
作者信息
- 1. 辽宁工程技术大学电子与信息工程学院，辽宁葫芦岛，125105
- 折叠
摘要
正交频分复用（OFDM）作为现代无线通信的物理层核心技术，其固有的高峰均功率比（PAPR）问题长期制约着系统功率效率的提升。现有抑制方案普遍存在自适应能力弱、场景泛化性差、级联策略缺乏理论指导等瓶颈。针对上述困境，本文提出一种"感知-自适应调整-执行"三级闭环联合PAPR抑制框架。该框架创新性地构建了完整闭环链路：（1）在感知层，提取时域PAPR、波峰因子及频域高幅值子载波占比三个互补物理量，经滑动窗口在线z-score归一化后形成特征向量；（2）在决策层，通过数据驱动自加权融合机制生成统一的抑制强度因子，并采用指数-双曲正切分段非线性映射函数动态输出五类执行参数，辅以瞬时PAPR与信道类型的二次微调；（3）在执行层，依次完成子载波预留、自适应硬限幅和加权峰值平滑补偿三级有序处理，每级处理均内嵌0.1 dB增益有效性判定与自动回退保护机制。在多调制-多信道共9种组合场景下的仿真表明：该框架PAPR降低量稳定在2.29-2.34 dB（较PTS算法提升约90%），跨场景性能波动仅0.05 dB，单帧处理延迟约0.65 ms，在低阶调制下BER控制在10?2量级，在抑制效能、场景鲁棒性、计算效率与信号保真度四个维度实现了均衡优化，为5.5G/6G绿色射频功放增效提供了具备工程部署潜力的闭环解决方案。
Abstract
OFDM enables high-data-rate transmission over frequency-selective fading channels. However, its inherent high peak-to-average power ratio (PAPR) remains a critical bottleneck, significantly constraining power amplifier efficiency and overall system energy efficiency. Existing PAPR suppression methods face the triple dilemma of adaptability, complexity, and distortion, highlighting an urgent need for more effective solutions. This paperproposes a novel three-stage closed-loop framework of perception-adjustment-execution, decomposing the problem into collaborative perception, decision-making, and execution subsystems. What sets this framework apart is its dynamic, data-driven approach that continuously optimizes suppression strategies in real time. The perception stage extracts time-domain PAPR, peak-to-average ratio, and the proportion of high-amplitude subcarriers in the frequency domain, and normalizes them online; the decision-making stage fuses features to generate suppression intensity coefficients and maps them to five operating parameters; the execution stage adopts three-level cascaded processing to ensure no net PAPR deterioration. Under various modulation and channel combinations, this framework achieves a PAPR reduction of 2.29-2.34 dB, with performance fluctuations less than 0.05 dB and latency of approximately 0.65 ms, balancing suppression effectiveness, robustness, computational efficiency, and signal fidelity. This research not only addresses a long-standing challenge in OFDM systems but also paves the way for more energy-efficient and reliable wireless communication networks.关键词
OFDM/峰均功率比（PAPR）/感知决策/自适应抑制/三级联合算法Key words
OFDM/Peak-to-Average Power Ratio (PAPR)/Perceptual Decision Making/Adaptive Suppression/Three-Level Joint Algorithm引用本文复制引用
韩庆奇,张敏.基于感知-自适应调整-执行的OFDM信号三级联合PAPR抑制算法研究[EB/OL].(2026-07-27)[2026-07-30].http://www.paper.edu.cn/releasepaper/content/202607-32.学科分类
无线通信/通信/电子技术应用
