A Progressive Approach to Joint Source-Channel Coding for Image Super-Resolution Task in Semantic Communications

IF 5.5 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS IEEE Wireless Communications Letters Pub Date : 2025-04-22 DOI:10.1109/LWC.2025.3563231

Zhen Huang;Yunjian Jia;Wanli Wen;Liang Liang;Jiping Yan;Nanlan Jiang

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Abstract

The image super-resolution (SR) task in semantic communication can directly apply the delivered information to the downstream SR task, eliminating complex processing at the receiver and significantly improving communication efficiency. This approach is vital for applications in areas such as telemedicine and satellite communications. Nevertheless, developing semantic communication systems for image SR tasks confronts challenges in creating high-performance joint source-channel coding (JSCC) schemes and mitigating wireless channel interference. In this letter, a progressive refinement attention feature (PRAF) module is proposed for the image SR task in semantic communication. This module effectively extracts deep semantic information from images via a progressive feature extraction strategy and adjusts the semantic information according to the SNRs using an improved channel attention mechanism. Building on PRAF, we custom-design the JSCC scheme for image SR tasks in semantic communications. Simulation results validate the effectiveness of the proposed PRAF module and confirm its superiority over existing deep neural networks (DNNs) based JSCC schemes and traditional separated source channel coding schemes.

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语义通信中图像超分辨率任务的一种渐进源信道联合编码方法

语义通信中的图像超分辨率任务可以直接将传递的信息应用到下游的图像超分辨率任务中，消除了接收端的复杂处理，显著提高了通信效率。这种方法对于远程医疗和卫星通信等领域的应用至关重要。然而，开发用于图像SR任务的语义通信系统面临着创建高性能联合源信道编码（JSCC）方案和减轻无线信道干扰的挑战。本文针对语义通信中的图像SR任务，提出了一种渐进细化注意特征（PRAF）模块。该模块通过渐进式特征提取策略有效提取图像的深层语义信息，并利用改进的信道注意机制根据信噪比调整语义信息。在PRAF的基础上，我们为语义通信中的图像SR任务定制了JSCC方案。仿真结果验证了所提PRAF模块的有效性，并证实了其优于现有的基于深度神经网络（dnn）的JSCC方案和传统的分离源信道编码方案。

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来源期刊

IEEE Wireless Communications Letters Engineering-Electrical and Electronic Engineering

CiteScore

12.30

自引率

6.30%

发文量

481

期刊介绍： IEEE Wireless Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of wireless communications. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of wireless communication systems.