语义信道编译码器模糊匹配场景下的发端设计  

Transmission Design for Semantic Channel Encoder-decoder in Fuzzy Matching Scenario

作　　者：曹琦 杜雅萌 万飞 白宝明[2] CAO Qi;DU Yameng;WAN Fei;BAI Baoming(Guangzhou Institute of Technology,Xidian University,Guangzhou 510555,China;State Key Laboratory of ISN,Xidian University,Xi'an 710071,China)

机构地区：[1]西安电子科技大学广州研究院,广东广州510555 [2]西安电子科技大学空天地一体化综合业务网全国重点实验室,陕西西安710071

出　　处：《移动通信》2023年第4期60-64,共5页Mobile Communications

基　　金：国家重点研发计划项目(2021YFA1000500)。

摘　　要：从香农经典信息论到语义通信,信息传递模式由“比特传输”逐渐向“语义传输”转变。传统通信中,码本作为编译码器的共同语言,可以保证通信的无歧义传输。然而,语义编译码器可能无法实现精准匹配,进而导致无法利用经典信息论来解决语义通信问题。首先,提出了语义信道编译码器模糊匹配时的通信系统,其中语义信道译码器固定,只能通过单方面设计语义信道编码方式来降低语义信息被错误接收的概率。然后,特别考虑了一个简单的语义通信系统,其中语义信道为一个语义对称信道。受语义译码器的性能约束,语义编码器只能通过重复发送语义符号来降低语义信息被错误译码的概率。最后,给出语义信息的平均译码错误概率与传输次数之间的关系。From Shannon’s classic information theory to semantic communication,information transmission mode has gradually changed from"bit transmission"to"semantic transmission".In traditional communication,the codebook is used as the common language of encoder-decoder to assure the unambiguous transmission of communication.However,the semantic encoder and decoder may not be able to achieve exact matching,which makes it impossible to use classical information theory to solve semantic communication problems.Firstly,a communication system with semantic channel codec fuzzy matching is proposed,where the semantic channel decoder is fixed and the probability of the error-reception of semantic information can only be reduced by unilaterally designing the semantic channel coding method.Then,a simple semantic communication system is specially considered,where the semantic channel is a semantic symmetric channel.Constrained by the performance of semantic decoder,the semantic encoder can reduce the error-reception probability of semantic information by repeatedly sending semantic symbols.Finally,the relationship between the transmission error probability and the transmission times of semantic information is given.

关 键 词：语义通信 语义信道编译码 错误传输概率 信息传输速率 

分 类 号：TN929.5[电子电信—通信与信息系统]