A Phase Offset Blind Estimation Algorithm for QAM Modulation and Its FPGA Implementation

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-04-21 DOI:10.1109/LCOMM.2025.3562854

Zifeng Tang;Cuicui Zhang;Xinyan Zhou;Shengliang Zhu;Anxue Zhang;Zhensheng Shi

引用次数: 0

Abstract

This letter presents the design, implementation, and validation of an FPGA-based phase offset estimation and compensation algorithm for RF communication systems. The algorithm improves the vector-valued phase estimator (VVPE) method by selecting the outermost constellation points to improve the phase estimation accuracy, and it supports various QAM modulation schemes. The effectiveness of the algorithm is first verified through MATLAB simulations and Pluto SDR-based experiments, during which the optimal value of the averaging filter parameter N is determined. The algorithm is then implemented on an FPGA, and a test system is developed in conjunction with RF instruments to validate its performance. The experimental results demonstrate that the proposed system achieves high accuracy, low latency, and efficient utilization of hardware resources, making it suitable for practical communication applications.

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QAM调制的相位偏移盲估计算法及其FPGA实现

本文介绍了一种基于fpga的射频通信系统相位偏移估计和补偿算法的设计、实现和验证。该算法改进了向量值相位估计（VVPE）方法，通过选择最外层星座点来提高相位估计精度，并支持多种QAM调制方案。首先通过MATLAB仿真和基于Pluto sdr的实验验证了算法的有效性，并确定了平均滤波器参数N的最优值。然后在FPGA上实现了该算法，并结合射频仪器开发了测试系统来验证其性能。实验结果表明，该系统精度高、时延低、硬件资源利用率高，适合实际通信应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.