Fast synchronization scheme for SMCC+system with lower SNR

1.INTRODUCTION IntheexistingdigitalTVterrestrialbroadcasting standards,therearethetrellis coded8 levelvestigial side band(8 VSB)modulationsystemdevelopedby advancedtelevisionsystemscommittee(ATSC)[1], thecodedorthogonalfrequencydivisionmultiplexing (COFDM)modulationwasdoptedinthedigitalvideo terrestrialbroadcasting(DVB T)[2]standardandthe bandwidthsegmentedtransmission(BST) OFDM systemforterrestrialintegratedservicedigitalbroad casting(ISDB T)[3].Inaword,eachsystemhasits advan…     

Evolution of two properties for scale-free network

1 .INTRODUCTIONBecause complex network structure can describe awide variety of systems of high technological andintellectual i mportance ,there has been a consider-able interest in the growth properties of randomnetworks[1 ,2]. The typical random network is ascale-free network, which connectivity distribu-tions behave as power law. Scale-free network isan evolving network, which has many propertiesduring evolution, for example , the fitness andclustering coefficient of node are two i mport…     

Synchronization of two 3-scroll hyperchaotic attractors using wavelet transform

1 .INTRODUCTIONChaotic synchronizationis a key technology in cha-otic secure communication, the low di mensionalchaotic systems have only one positive Lyapunovexponent ,the performance of securityis not ideal ,hyperchaotic systems have two or more than twopositive Lyapunov exponents , the performance ofsecurityisi mproved greatly ,sothe synchronizationof hyperchotic systems has arisen great inter-est[1 ~4].N-scroll( N =3,4,5...)attractor is akind of hyperchaotic attractor ,the method of g…     

生物分子和细胞物理学

本书是第75届Les Houches暑期讲习班的论文集，主题是生物分子和细胞物理学。参加这次讲习班的共有64人，分别来自美国、英国、法国、丹麦、俄国、匈牙利、以色列、波兰、乌克兰、德国、加拿大、荷兰等国。     

A distributed adaptive multi-hop certification authority schemefor mobile Ad Hoc networks

1.INTRODUCTION Amobileadhocnetwork(MANET)isanau tonomoussystemofmobilenodesconnectedbywire lesslinks,theunionofwhichformsacommunication networkmodeledintheformofanarbitrarycommu nicationgraph[1].Thesalientfeaturesofadhocnet worksposechallengesinachievingsecuritygoals.In wirednetworks,anadversarycannotattacknetworks untilitconnectswiredphysicallink.Bycontrary,an attackinwirelessnetworksmaycomefromanyloca tion.Thereforeadhocnetworksmustadoptdis tributedcertificationauthority(CA),otherwis…     

雨林顶上翻跟头

“妈妈,就让我参加雨林顶探险吧!我一定会像一个勇敢的冒险家一样,绝不怕苦怕累!”小詹姆苦苦哀求,他对热带雨林实在是太着迷了,尤其是那高耸入云的雨林顶,仿佛那里有很多秘密等待他去发现。终于,梅格博士同意了,惟一的条件     

军用计算机技术的发展趋势

军用武器的研制即将进入灵巧与高性能武器、人工智能、2000年陆空战和星球大战的领域,因此需要完全以超大规模集成电路(VLSI)为基础的数字技术和更加先进的军用计算机。那么单靠超高速集成电路(VHSIC)计划能使军用数字电子设备与民用研制相比处于技术领先地位吗? 为了加速防御用的高性能VLSI的研制,     

分析雷达系统的知识系统

一种用于分析现有雷达系统的知识系统模型已经研制出来。它是一个称为ASTA的计算机程序。它通过人机对话接收有关系统属性、分系统属性或信号参数的一些数据,然后逐步深入地推断它能得出的许多其他属性的数据。ASTA借助它那包含许多事实和经验规则的人工智能知识库,可以专门用来分析雷达系统。这些事实与经验规则确定了应该如何从现有信息去推断新的信息。这个数据库的知识是来自雷达设计专家和分析专家,还来自雷达设计手册。ASTA知识库表征着人们将雷达设计作为可观察的运用特性的函数所作的尝试。它是这方面首次公开发表的成果。     

用于目标跟踪的状态估计

本文综述目标跟踪领域内的问题和解决办法,讨论包括设计综合方法、性能估价和当前正在研究的课题。