摘要
提出了一种基于图样−星座双判别器生成对抗网络(Pattern-Constellation dual GAN)的正交频分复用(OFDM)信号生成方案。首先,使用快速傅里叶变换(FFT)对时域OFDM信号进行预处理,得到的频域符号向量被拼接为二维数据矩阵,用于GAN的训练和测试。为保证生成的信号具有协议要求的子载波结构和调制方式,设计了双判别器GAN:生成器生成时频二维图样以欺骗两个判别器,而两个判别器分别从子载波结构和调制符号的星座密度两个方面区分生成的图样和真实图样。最后,以Wi-Fi 802.11a协议为例验证了该方案的有效性。
Generating digital signal in complex electromagnetic environment is one of the core issues in communication countermeasures and jamming.An orthogonal frequency-division multiplexing(OFDM)signal generation scheme based on the pattern-constellation dual discriminator generative adversarial network(Pattern-Constellation dual GAN)is developed.First,symbol vectors in frequency domain are generated by applying the fast Fourier transform to the OFDM signals.Then,the symbol vectors are orderly concatenated into a two-dimensional matrix and stored as a gray-scale image,which contains the corresponding time-frequency features of the OFDM signals.Furthermore,such gray-scale images are used for training and testing the proposed Dual GAN network.In our network,an adversarial game among one generator and two discriminators is established to generate gray-scale images which contain the same time-frequency features as in the training images.The generator aims to generate a counterfeit image to confuse the two discriminators,while the two discriminators aim to distinguish the subcarrier structure and the constellation density between the generated image and the real image,respectively.Finally,the Wi-Fi 802.11a protocol signals are used as examples to verify the effectiveness of proposed signal generation model.
作者
陈丽
许思扬
刘芳
冯奇
刘承享
徐福琛
田淼
刘光辉
CHEN Li;XU Siyang;LIU Fang;FENG Qi;LIU Chengxiang;XU Fuchen;TIAN Miao;LIU Guanghui(The 54th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050051;School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731)
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2023年第6期841-850,共10页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金面上项目(62071097)
四川省自然科学基金面上项目(2023NSFSC0458)。
关键词
通信对抗
数字信号生成
生成对抗网络
正交频分复用
时频二维图样
communication countermeasure
digital signal generation
generative adversarial network
orthogonal frequency-division multiplexing
time-frequency pattern
