A Recognition Algorithm for Modulation Schemes by Convolution Neural Network and Spectrum Texture

基于卷积神经网络与时频图纹理信息的信号调制方式分类方法

Institute of Information and Navigation, Air Force Engineering University, Xi'an 710077, China

Received: 23 July 2018

Abstract

The recognition of modulation schemes for communication signals is an important part of communication surveillance and spectrum monitoring. An algorithm based on deep learning and spectrum texture is proposed to recognize modulation schemes. Based on imperceptible differences among various spectrums of modulation schemes, the algorithm uses Convolution Neural Network to capture the features of image texture and thus classify the features with a SOFTMAX classifier. The experiment shows the algorithm performs better than traditional algorithm based on feature parameters, while the features captured can better reveal the signal detail and reduces effort on feature parameter design.

摘要

通信信号的调制方式识别是通信侦察、频谱监测的重要工作内容之一，提出一种利用深度学习提取信号时频图纹理信息的分类方法。该方法利用不同调制方式在时频图细节上的微弱差别，并使用卷积神经网络提取图像纹理特征，最终输入SOFTMAX分类器进行分类。结果表明，该方法在大样本条件下，可取得良好的分类效果。与传统基于特征参数的支持向量机分类方法或前馈神经网络方法相比，其提取特征更优、分类效果更好，同时减少了人工设计特征参数的工作量和不确定性。