摘要
深度学习模型在调制识别任务中依赖大量训练样本,但实际场景中信号样本有限,尤其在复杂噪声环境下,模型性能受限。为此,提出了一种基于局部特征引导的轻量化调制识别方法。首先,构建轻量化教师网络以提取含噪调制信号的局部特征,并设计局部语义特征优化算法将局部知识蒸馏给学生网络;其次,针对调制信号频谱的复数域特性,设计复数域Transformer作为学生网络进行全局特征提取,并最终完成识别任务。实验结果表明,所提模型在小样本场景下相比其他深度学习模型具有更高的识别效率,在计算复杂度和实时性等方面较现有方法表现出明显优势。
Deep learning models rely on a large number of training samples in the modulation recognition task.However,in actual scenarios,the signal samples are limited,especially in complex noise environments,where the model performance is restricted.Therefore,a lightweight modulation recognition method based on local feature guidance was proposed.Firstly,a lightweight teacher network was constructed to extract local features from noisy modulated signals,and a local semantic feature optimization algorithm was designed to distill local knowledge into the student network.Secondly,aiming at the complex-domain characteristics of the modulated signal spectrum,a complexdomain Transformer was designed as the student network for global feature extraction,ultimately completing the recognition task.Experimental results show that the proposed model demonstrates higher recognition efficiency in smallsample scenarios compared with other deep learning models,and exhibits significant advantages in terms of computational complexity and real-time performance compared with existing methods.
作者
王子恒
张徐
高硕
周金
WANG Ziheng;ZHANG Xu;GAO Shuo;ZHOU Jin(School of Information Science and Technology,Tianjin University of Finance and Economics,Tianjin 300222,China)
出处
《电信科学》
北大核心
2025年第8期163-175,共13页
Telecommunications Science
基金
天津自然科学基金面上项目(No.22JCYBJC01550)。
