ALWNN Empowered Automatic Modulation Classification: Conquering Complexity and Scarce Sample Conditions
This work addresses practical limitations in AMC for real-world applications like communication systems, though it is incremental as it builds on existing wavelet and few-shot methods.
The paper tackles the high computational and data demands of deep learning for Automatic Modulation Classification (AMC) by proposing an Adaptive Lightweight Wavelet Neural Network (ALWNN) and a few-shot framework (MALWNN), achieving significant reductions in parameters and computational complexity while performing well in few-shot scenarios.
In Automatic Modulation Classification (AMC), deep learning methods have shown remarkable performance, offering significant advantages over traditional approaches and demonstrating their vast potential. Nevertheless, notable drawbacks, particularly in their high demands for storage, computational resources, and large-scale labeled data, which limit their practical application in real-world scenarios. To tackle this issue, this paper innovatively proposes an automatic modulation classification model based on the Adaptive Lightweight Wavelet Neural Network (ALWNN) and the few-shot framework (MALWNN). The ALWNN model, by integrating the adaptive wavelet neural network and depth separable convolution, reduces the number of model parameters and computational complexity. The MALWNN framework, using ALWNN as an encoder and incorporating prototype network technology, decreases the model's dependence on the quantity of samples. Simulation results indicate that this model performs remarkably well on mainstream datasets. Moreover, in terms of Floating Point Operations Per Second (FLOPS) and Normalized Multiply - Accumulate Complexity (NMACC), ALWNN significantly reduces computational complexity compared to existing methods. This is further validated by real-world system tests on USRP and Raspberry Pi platforms. Experiments with MALWNN show its superior performance in few-shot learning scenarios compared to other algorithms.