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In broadband reconnaissance scenarios,achieving high signal detection accuracy often entails significant computational costs. To address this,a multi-scale convolution attention sparse detection(MSCAS) method is proposed,which incorporates prior knowledge of signal spectrograms by capturing long-range temporal dependencies and suppressing irrelevant frequency-domain interference. MSCA-S introduces a multiscale horizontal convolution attention(MSHCA) mechanism that jointly extracts multi-dimensional signal features,enhancing detection accuracy while reducing computational complexity through horizontal convolution. Building on MSHCA,a hierarchically stacked broadband signal detection framework is developed,and sparse feature parameters are used to further optimize computational efficiency. MSCA-S is evaluated on a real-world and simulated broadband signal dataset(2.5 MHz spectrum) collected in Qingdao,achieving an average detection accuracy of 95.6% across varying signal-to-noise ratios. Compared with the frequency-sensitive signal detector,the Swin-Transformer-based protocol recognition method,and the Res-101 detection method,MSCA-S improves accuracy by 0.05%,2.94%,and 6.14%,respectively,while reducing computational costs by 1.53×1010,1.79×1010,and 4.59×1010,respectively.
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宽带侦察场景下,虽然信号检测识别准确率高,但计算资源消耗过大的问题亟待解决。为此,提出了一种基于多尺度卷积注意力的稀疏检测方法(Multi-scale Convolution Attention Sparse Detection,MSCA-S)。该方法结合信号时频图的先验知识,通过建模信号在时间轴上的远距离依赖关系并抑制频率轴的无关干扰,设计了多尺度水平卷积注意力机制(Multi-scale Horizontal Convolution Attention,MSHCA),联合提取信号的多维特征,有效提升检测识别精度,并通过水平卷积降低模型计算复杂度。基于MSHCA,构建了层次化堆叠的宽带信号检测方法,利用稀疏特征参数进一步减少计算资源需求。在频谱范围为2.5 MHz的青岛实采及仿真宽带信号数据集上进行实验,MSCA-S在不同信噪比下的平均检测精度达95.6%,相比频率敏感宽带信号检测方法、基于Swin-Transformer的协议信号识别方法和基于101层残差网络的信号检测方法,精度分别提升了0.05%、2.94%和6.14%,计算量分别降低了1.53×1010、1.79×1010和4.59×1010。
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龚安 男,1971年生于四川巴中,2001年获硕士学位,现为副教授、硕士生导师,主要研究方向为大数据智能处理技术。
张静蕾 女,2000年生于山东泰安,2022年获学士学位,现为硕士研究生,主要研究方向为信号检测识别。
郭兰图 男,1982年生于山东鱼台,2007年获硕士学位,现为研究员,主要研究方向为频谱管理和复杂电磁环境建模领域技术。
赵晓蕾 男,1992年生于山东青岛,2018年获硕士学位,现为工程师,主要研究方向为智能信号处理、模式识别、机器学习等。
刘玉超 男,1984年生于山东聊城,2010年获硕士学位,现为高级工程师,主要研究方向为电磁频谱管理和复杂电磁环境建模领域技术。
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张静蕾 女,2000年生于山东泰安,2022年获学士学位,现为硕士研究生,主要研究方向为信号检测识别。
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2中国电波传播研究所,山东 青岛 266107, bio={"content":"
郭兰图 男,1982年生于山东鱼台,2007年获硕士学位,现为研究员,主要研究方向为频谱管理和复杂电磁环境建模领域技术。
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郭兰图 男,1982年生于山东鱼台,2007年获硕士学位,现为研究员,主要研究方向为频谱管理和复杂电磁环境建模领域技术。
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赵晓蕾 男,1992年生于山东青岛,2018年获硕士学位,现为工程师,主要研究方向为智能信号处理、模式识别、机器学习等。
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赵晓蕾 男,1992年生于山东青岛,2018年获硕士学位,现为工程师,主要研究方向为智能信号处理、模式识别、机器学习等。
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刘玉超 男,1984年生于山东聊城,2010年获硕士学位,现为高级工程师,主要研究方向为电磁频谱管理和复杂电磁环境建模领域技术。
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刘玉超 男,1984年生于山东聊城,2010年获硕士学位,现为高级工程师,主要研究方向为电磁频谱管理和复杂电磁环境建模领域技术。
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| 信号调制类型 | 带宽/kHz | 生成方式 | 采集地点 |
|---|
| 8FSK | 150 | 实采 | 青岛 |
| 32QAM | 400 | 实采 | 青岛 |
| 0.3GMSK | 27 | 实采 | 青岛 |
| 2FSK | 40 | 实采 | 青岛 |
| PPM | 70 | 实采 | 青岛 |
| Π/4QPSK | 100 | 实采 | 青岛 |
| FM | 16 | 实采 | 青岛 |
| 4PSK | 48 | 仿真 | 无需采集 |
| QPSK | 100 | 仿真 | 无需采集 |
| 16QAM | 387 | 仿真 | 无需采集 |
| 8PSK | 24 | 仿真 | 无需采集 |
| 4FSk | 3 | 仿真 | 无需采集 |
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信号参数表
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| 信号调制类型 | 带宽/kHz | 生成方式 | 采集地点 |
|---|
| 8FSK | 150 | 实采 | 青岛 |
| 32QAM | 400 | 实采 | 青岛 |
| 0.3GMSK | 27 | 实采 | 青岛 |
| 2FSK | 40 | 实采 | 青岛 |
| PPM | 70 | 实采 | 青岛 |
| Π/4QPSK | 100 | 实采 | 青岛 |
| FM | 16 | 实采 | 青岛 |
| 4PSK | 48 | 仿真 | 无需采集 |
| QPSK | 100 | 仿真 | 无需采集 |
| 16QAM | 387 | 仿真 | 无需采集 |
| 8PSK | 24 | 仿真 | 无需采集 |
| 4FSk | 3 | 仿真 | 无需采集 |
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| 参数名称 | 具体设置 |
|---|
| STFT点数 | 65536 |
| 窗类型 | hann |
| 窗长 | 63356 |
| 窗重叠率/% | 70 |
| 时间分辨率/ms | 8 |
| 频率分辨率/Hz | 40 |
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预处理参数表
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| 参数名称 | 具体设置 |
|---|
| STFT点数 | 65536 |
| 窗类型 | hann |
| 窗长 | 63356 |
| 窗重叠率/% | 70 |
| 时间分辨率/ms | 8 |
| 频率分辨率/Hz | 40 |
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| 名称 | 参数 |
|---|
| 操作系统 | Ubuntu 20.04.5 LTS |
| CPU | Intel(R)Xeon(R)Gold 6348 CPU @ 2.60 GHz×2 |
| GPU | NVIDIA A100-PCIE-40GB×4 |
| 内存/GB | 768 |
| 编译环境 | PyCharm-Professional-2023.1 x64 |
| Anaconda版本 | Anaconda23.1.0(Python 3.10) |
| 深度学习框架 | Torch2.0.1 |
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实验环境参数
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| 名称 | 参数 |
|---|
| 操作系统 | Ubuntu 20.04.5 LTS |
| CPU | Intel(R)Xeon(R)Gold 6348 CPU @ 2.60 GHz×2 |
| GPU | NVIDIA A100-PCIE-40GB×4 |
| 内存/GB | 768 |
| 编译环境 | PyCharm-Professional-2023.1 x64 |
| Anaconda版本 | Anaconda23.1.0(Python 3.10) |
| 深度学习框架 | Torch2.0.1 |
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| 检测方法 | 参数量/106 | FLOPs/109 | 推理时间/ms | 每秒帧数 |
|---|
| Res-101[23] | 125.2 | 97.7 | 100.4 | 9.9 |
| Swin-T[14] | 109.6 | 69.9 | 80.3 | 12.3 |
| FSSDet[16] | 103.7 | 67.1 | 82.0 | 12.5 |
| MSCA-S | 99.1 | 51.8 | 37.7 | 26.6 |
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各检测方法性能对比表
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| 检测方法 | 参数量/106 | FLOPs/109 | 推理时间/ms | 每秒帧数 |
|---|
| Res-101[23] | 125.2 | 97.7 | 100.4 | 9.9 |
| Swin-T[14] | 109.6 | 69.9 | 80.3 | 12.3 |
| FSSDet[16] | 103.7 | 67.1 | 82.0 | 12.5 |
| MSCA-S | 99.1 | 51.8 | 37.7 | 26.6 |
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| 模型名称 | 各阶段网络结构 | [C1, C2, C3, C4] | [L1, L2, L3, L4] | 设置描述 |
|---|
| MSHAConvNet-Ⅰ | [ M,M,C,M] | [ 64,128,320,512] | [ 3,3,5,3] | 第三阶段MSHCA替换为CNN |
| MSHAConvNet -Ⅱ | [ M,M,M,M] | [ 64,128,320,512] | [ 3,3,12,3] | 增加第三阶段构建块数 |
| MSHAConvNet -Ⅲ | [ M,M,M,M] | [ 64,128,256,512] | [ 3,3,5,3] | 减少第三阶段的通道数 |
| MSHAConvNet -Ⅳ | [ M,M,M,M] | [ 64,128,320,512] | [ 3,3,5,3] | 本文默认结构 |
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消融实验中特征提取骨干网络结构设计
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| 模型名称 | 各阶段网络结构 | [C1, C2, C3, C4] | [L1, L2, L3, L4] | 设置描述 |
|---|
| MSHAConvNet-Ⅰ | [ M,M,C,M] | [ 64,128,320,512] | [ 3,3,5,3] | 第三阶段MSHCA替换为CNN |
| MSHAConvNet -Ⅱ | [ M,M,M,M] | [ 64,128,320,512] | [ 3,3,12,3] | 增加第三阶段构建块数 |
| MSHAConvNet -Ⅲ | [ M,M,M,M] | [ 64,128,256,512] | [ 3,3,5,3] | 减少第三阶段的通道数 |
| MSHAConvNet -Ⅳ | [ M,M,M,M] | [ 64,128,320,512] | [ 3,3,5,3] | 本文默认结构 |
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