Achieving Robust Generalization for Wireless Channel Estimation Neural Networks by Designed Training Data
This addresses the challenge of robust channel estimation for battery-powered mobile terminals, though it appears incremental as it builds on existing neural network architectures.
The paper tackles the problem of neural networks failing to generalize to unseen wireless channels by proposing a method to design training data that supports robust generalization, avoiding the need for online training. Simulation results show that trained neural networks maintain almost identical performance on unseen channels.
In this paper, we propose a method to design the training data that can support robust generalization of trained neural networks to unseen channels. The proposed design that improves the generalization is described and analysed. It avoids the requirement of online training for previously unseen channels, as this is a memory and processing intensive solution, especially for battery powered mobile terminals. To prove the validity of the proposed method, we use the channels modelled by different standards and fading modelling for simulation. We also use an attention-based structure and a convolutional neural network to evaluate the generalization results achieved. Simulation results show that the trained neural networks maintain almost identical performance on the unseen channels.