通信系统脆性的数学模型及分析方法  

Model and analysis of communication system brittleness

作　　者：薛萍[1,2] 武俊峰[2] 金鸿章[3] 荣盘祥[2] 马静[2] 

机构地区：[1]哈尔滨理工大学电气工程博士后流动站,黑龙江哈尔滨150080 [2]哈尔滨理工大学自动化学院,黑龙江哈尔滨150080 [3]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《系统工程学报》2008年第6期759-763,共5页Journal of Systems Engineering

基　　金：第十个五年计划国防科工委基础研究基金资助项目(J1600B001);黑龙江省自然科学基金资助项目(F2007-10)

摘　　要：针对通信系统中存在的脆性问题,提出了关于通信系统脆性概念.根据信息论的信息率失真函数,建立通信系统脆性函数的数学模型.利用脆性函数模型对通信系统脆性进行定量分析及估算,并用二元离散信源为例说明该方法的有效性、可行性.结果说明通信系统的消息在传输过程中由于受到随机噪声的干扰,而使通信系统产生的"不确定性",导致通信后收信者从消息中获取不到关于信源的信息量,即外界环境提供的"负熵"无法满足时,它们的无序度增加,混乱程度增加,直至使整个通信系统达到崩溃状态.According to the brittleness problem existing in a communication system, brittleness definition of communication system is presented ; the mathematic model of communication system brittleness is set up in accordance with information distortion function shown in information theory. Through the model, communication system is quantitatively analyzed and estimated. Meanwhile, the effectiveness and feasibility of the method is stated by using a duality discrete information source ex- ample. The result shows that due to the random noise happened in transmitting process, the message delivered is disturbed, which leads the system to ＂the uncertainty＂, and causes the message receiver to fail to get the message from the sending source, i.e. when the ＂negative entropy＂ supplied from outside can not be satisfied, the disorder of messages increases, which leads the whole system to the final collapse.

关 键 词：通信系统 脆性 脆性函数 失真度 

分 类 号：N941.4[自然科学总论—系统科学]