arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.13477eess.SP
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自适应CSI反馈用于支持深度学习的图像传输

Adaptive CSI Feedback for Deep Learning-Enabled Image Transmission

Guangyi Zhang, Qiyu Hu, Yunlong Cai, Guanding Yu

摘要:

最近,深度学习使能的联合信源信道编码(JSCC)由于其在图像传输中的巨大成功而受到越来越多的关注。然而,大多数现有的JSCC研究仅关注单输入单输出(SISO)信道。在本文中,我们首先提出了一个JSCC系统的无线图像传输多输入多输出(MIMO)信道。由于图像的复杂性决定了其重建的难度,因此JSCC在不同图像上的重建效果有很大差异。此外,我们观察到,具有较高的重建质量的图像通常是更强大的噪声,可以分配较少的通信资源比具有较低的重建质量的图像。在此基础上,提出了一种自适应的信道状态信息(CSI)反馈预编码方案,通过调整反馈开销来提高预编码的有效性。特别是,我们开发了一个性能评估器来预测每个图像的重建质量,因此,该方案可以自适应地降低CSI反馈开销的传输图像的高预测重建质量的JSCC系统。实验结果表明,该方案可以显著提高图像传输性能,同时大大降低了反馈开销。

英文摘要:

Recently, deep learning-enabled joint-source channel coding (JSCC) has received increasing attention due to its great success in image transmission. However, most existing JSCC studies only focus on single-input single-output (SISO) channels. In this paper, we first propose a JSCC system for wireless image transmission over multiple-input multiple-output (MIMO) channels. As the complexity of an image determines its reconstruction difficulty, the JSCC achieves quite different reconstruction performances on different images. Moreover, we observe that the images with higher reconstruction qualities are generally more robust to the noise, and can be allocated with less communication resources than the images with lower reconstruction qualities. Based on this observation, we propose an adaptive channel state information (CSI) feedback scheme for precoding, which improves the effectiveness by adjusting the feedback overhead. In particular, we develop a performance evaluator to predict the reconstruction quality of each image, so that the proposed scheme can adaptively decrease the CSI feedback overhead for the transmitted images with high predicted reconstruction qualities in the JSCC system. We perform experiments to demonstrate that the proposed scheme can significantly improve the image transmission performance with much-reduced feedback overhead.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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