In this paper, the analysis of excess distortion exponent for joint source-channel coding (JSCC) in semantic-aware communication systems is presented. By introducing an unobservable semantic source, we extend the classical results by Csiszar to semantic-aware communication systems. Both upper and lower bounds of the exponent for the discrete memoryless source-channel pair are established. Moreover, an extended achievable bound of the excess distortion exponent for MIMO systems is derived. Further analysis explores how the block fading and numbers of antennas influence the exponent of semanticaware MIMO systems. Our results offer some theoretical bounds of error decay performance and can be used to guide future semantic communications with joint source-channel coding scheme.

翻译：本文介绍了对语义识别通信系统中联合源道编码(JSCC)超常扭曲指数的分析。通过引入一种不可观测的语义源,我们将Csiszar的经典结果扩展至语义识别通信系统,建立了离散无内存源道对子的上下界限。此外,还得出了离散无内存源道对子超扭曲指数的延伸可实现界限。进一步的分析探讨了区块衰减和天线数如何影响语义软件MIMO系统的引力。我们的结果提供了一些错误衰变功能的理论界限,可用于指导未来与联合源道连接的语义通信。