Deep Interference Recognition for Spread Spectrum Communications using Time-Frequency Transformer

Yi Wei, Shang-Rong Ou-Yang, Chao Li, Xiaoxiao Zhuo, Jian Wang
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Abstract

Spread spectrum techniques have been widely adopted in both military and commercial communications because of their anti-interference and anti-interception properties. How-ever, when the interference power is high and the spread spectrum gain is not sufficient to achieve satisfactory system performance, additional anti-interference techniques need to be employed, and the design of the interference sensing and recognition method is a basic prerequisite of effective interference suppression. In this work, considering the superiority of transformer networks in the field of deep learning, we propose a novel interference recognition method with short time Fourier transform (STFT) analysis and transformer. For making full use of the hidden information in both time and frequency domain, the proposed method intro-duces the STFT analysis to extract the high-dimensional feature. Furthermore, the idea of transformer is adopted in our method to introduce the attention mechanism focusing on the time-frequency correlation of the received signals and improve the recognition accuracy. Simulation results demonstrate the superiority of the proposed method versus other baseline competitors.
基于时频变压器的扩频通信深度干扰识别
扩频技术由于具有抗干扰和抗截获的特性,在军事和商业通信中得到了广泛的应用。然而,当干扰功率较大,扩频增益不足以达到令人满意的系统性能时,需要采用额外的抗干扰技术,而干扰感知和识别方法的设计是有效抑制干扰的基本前提。在本工作中,考虑到变压器网络在深度学习领域的优势,我们提出了一种基于短时傅立叶变换(STFT)分析和变压器的干扰识别方法。为了充分利用时域和频域的隐藏信息,该方法引入了STFT分析来提取高维特征。此外,该方法还采用了变压器的思想,引入了关注接收信号时频相关性的注意机制,提高了识别精度。仿真结果表明了该方法相对于其他基线竞争对手的优越性。
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