论文标题

用于深度调制分类的集合包装器子采样

Ensemble Wrapper Subsampling for Deep Modulation Classification

论文作者

Ramjee, Sharan, Ju, Shengtai, Yang, Diyu, Liu, Xiaoyu, Gamal, Aly El, Eldar, Yonina C.

论文摘要

接收到的无线信号的子采样对于放松硬件要求以及依赖输出样本的信号处理算法的计算成本很重要。我们提出了一种亚采样技术,以促进无线通信系统中自动调制分类的使用。与仅基于专家知识的预设策略的传统方法不同,拟议的数据驱动的亚采样策略采用了深层的神经网络体系结构来模拟从每个培训输入矢量中删除候选样本组合的效果,并以一种受到包装专题选择模型的方式启发的方式。然后,由另一个深度学习分类器处理的亚采样数据将识别出所考虑的10种调制类型中的每一种。我们表明,提出的亚采样策略不仅引入了分类器训练时间的急剧减少,而且还可以将分类准确性提高到比以前所达到的数据集更高的水平。这里的一个重要特征是利用深神经网络的可传递性能,以避免重新培训包装器模型,并通过仅依靠任何一个包装器的包装组合而不是可能的包装器来获得卓越的性能。

Subsampling of received wireless signals is important for relaxing hardware requirements as well as the computational cost of signal processing algorithms that rely on the output samples. We propose a subsampling technique to facilitate the use of deep learning for automatic modulation classification in wireless communication systems. Unlike traditional approaches that rely on pre-designed strategies that are solely based on expert knowledge, the proposed data-driven subsampling strategy employs deep neural network architectures to simulate the effect of removing candidate combinations of samples from each training input vector, in a manner inspired by how wrapper feature selection models work. The subsampled data is then processed by another deep learning classifier that recognizes each of the considered 10 modulation types. We show that the proposed subsampling strategy not only introduces drastic reduction in the classifier training time, but can also improve the classification accuracy to higher levels than those reached before for the considered dataset. An important feature herein is exploiting the transferability property of deep neural networks to avoid retraining the wrapper models and obtain superior performance through an ensemble of wrappers over that possible through solely relying on any of them.

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