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91.
Efficient structures for wideband digital receiver 总被引:1,自引:0,他引:1
Wang Hong Lu Youxin Wang Xuegang & Wan Yonglun Univ. of Electronic Science Technology of China Chengdu P. R. China 《系统工程与电子技术(英文版)》2006,17(3):483-486
1 .INTRODUCTIONWith the development of high perfor mance ana-logue-to-digital converters ( ADC) , applicationspecific integrated circuit ( ASIC) devices anddigital signal processing ( DSP) technology , dig-ital receiver has increasingly become popular inrecent years[1 ~7]. The digital receiver is a typi-cal application of software radio in radar . Itsmain purpose is to move the digital conversionprocess closer to the antenna and execute mainfunctions on general hardware . But the sign… 相似文献
92.
Sensor management based on fisher information gain 总被引:2,自引:0,他引:2
Tian Kangsheng~ & Zhu Guangxi~ . Dept. of Telecommunication Engineering Huazhong Univ. of Science & Technology Wuhan P. R. China . Dept. of Command Automation Engineering Airforce Radar Academy Wuhan P. R. China 《系统工程与电子技术(英文版)》2006,17(3):531-534
1 .INTRODUCTIONSensor management can be described as a systemor process that provides automatic or semi-auto-matic control of a group of sensors[1]. The basicobjective of sensor management is to select rightsensors to do the right service on the right targetat right ti me based on external measurements orcriteria[2]. A variety of techniques have been pro-posed or appliedtothe area of sensor management .One of the first articles to apply opti mization tech-nique to sensor management is by … 相似文献
93.
Chen Niansheng~ Li Layuan~ & Dong Wushi~ .School of Computer Science Wuhan Univ. of Technlogy Wuhan R. R. China .Dept.of Computer Science Hubei Normal Univ. Wuhan P. R. China 《系统工程与电子技术(英文版)》2006,17(3):642-647
1 .INTRODUCTIONA mobile Ad hoc network refers to a temporal multi-hop autonomy system,whichis constituted by a groupof mobile nodes containing wireless send-receive equip-ments[1].It possesses manycharacteristics-fast-deploy-able,self-organized,acentric , movable and of multi-hop.It can be wildly applied to many fields ,such asnational defense,emergency and disaster ,scientificin-vestigation and exploration etc .,and uponthat ,it hasgreat prospects[1 ,3 6]. With the wide spread of mo-bile… 相似文献
94.
Gan Rongbing & Wang Jianguo .National Electronic Warfare Lab Chengdu P.R.China .School of Electronic Engineering Univ. of Electronic Science Techndogy Chengdu P. R. China 《系统工程与电子技术(英文版)》2006,17(4):717-721
1. INTRODUCTION Many researches have been made on automatic target recognition (ATR) from SAR images in the past few years. Lincoln Laboratory has developed a complete, end-to-end ATR system[1-4]. The whole system inclu- des three stages: detection (or prescreening), discri- mination and classification. In the detection stage, a two-parameter CFAR (constant false alarm rate) detector is used as a prescreener to select candidate targets in an SAR image on the basis of local brightne… 相似文献
95.
Zhang Yougang & Xu Bugong Coll. of Automatic Science & Engineering South China Univ. of Technology Guangzhou P. R. China 《系统工程与电子技术(英文版)》2006,17(4):836-845
1. INTRODUCTION Large-scale dynamic system theory has been intensi- vely studied during the past decade[1~3], but for fuzzy large-scale systems, namely large-scale systems comp- osed of a series of fuzzy subsystems, has been seldom done in literature. In Ref.[4], decentralized stabiliz- ation problem of fuzzy large-scale systems composed of a series of fuzzy subsystems was considered. Sufficient conditions for asymptotic stability of the fuzzy large-scale system and design methods of dec… 相似文献
96.
Liu ChenFirst Inst. Equipment Research Inst. of Second Artillery Beijing P. R. China 《系统工程与电子技术(英文版)》2006,17(4):901-909
1. INTRODUCTION Weapon equipments acquisition and demonstration has become more and more prominent in the informationalized war conditions while operational effectiveness evaluation is its core part. The compl- exity and uncertainty of weapon systems operational effectiveness evaluation make traditional analysis methods or expert evaluation methods less effective to solve problems. Simulation based operational effe- ctiveness evaluation is an efficient solution. The increased complexity o… 相似文献
97.
98.
在无线通讯系统中,网络通过从数据库中查找用户信息来跟踪用户,这样就需要把用户信息事先存储在大量的数据库中。本书讨论了有关在数据库中复制用户信息并更新的若干问题。 相似文献
99.
本书全面介绍了数字通信系统的理论和实际应用方法,并且包含了在数字信号传输中需要运用的关于设计、实现和测试的最新方法和技术。此书介绍的基本技术有:纠错码、多路复用、数字调制、数字用户线路、电缆调制、移动无线网络、城域网和光纤网络。新的工业标准有:声音/视频编码、SONET/SDH、DWDM、ATM、宽带无线网、网络同步和网络管理。每一章节后都有评述和参考文献和大量习题(无答案)。 相似文献
100.
Lu Kun & Liu XingzhaoDepartment of Electronic Engineering Shanghai Jiaotong University Shanghai P.R. China 《系统工程与电子技术(英文版)》2005,16(1)
1.INTRODUCTION High frequencyskywaveover the horizonradarcan providearange coverageofupto4000kmbymeans oftherefractionwithintheionosphere.Butthesignal contaminationsufferedindoubleionospherictransit, especially,thenonstationarityoftheionosphereren derstheechospectrumdistortedandresolutionofco herentintegrationtechniquethatiswidelyappliedin theradarsystemsisdegradedextremely. InsomeapplicationsofHFskywaveradar,some complexgeophysicalmechanismsincludedthevaria tionoftheionospheremaypro… 相似文献