Deep learning-based autoencoders have been employed to compress and reconstruct channel state information (CSI) in frequency-division duplex systems. Practical implementations require judicious quantization of encoder outputs for digital transmission. In this paper, we propose a novel quantization module with bit allocation among encoder outputs and develop a method for joint training the module and the autoencoder. To enhance learning performance, we design a loss function that adaptively weights the quantization loss and the logarithm of reconstruction loss. Simulation results show the performance gain of the proposed method over existing baselines.
@article{arxiv.2503.08125,
title = {Quantization Design for Deep Learning-Based CSI Feedback},
author = {Manru Yin and Shengqian Han and Chenyang Yang},
journal= {arXiv preprint arXiv:2503.08125},
year = {2025}
}