Convergence of WLAN and WCDMA

This paper analyzes the complementary and competitive relation-ship between WCDMA and WLAN and the strength brought to mo-bile operators by their convergence.Then it outlines 3GPP's solu-tions to the convergence of WLAN and WCDMA,and elaborates onZTE's convergence solution.     

Comparisons of EVD and DVD

1Introduction Chinahasthelargestmarketofaudio visualequip mentintheworld,whichisrapidlydevelopedfrom VCD,SVCDtoDVD.Now,themarketofDVDisin creasedveryfast,especiallyintheinternationalmarket(increasingbyafactorof25%everyyear).Butitis limitlessforpeopletohan…     

Journal of Electronic Science and Technology of China

Journal of Electronic Science and Technology of China (JESTC) is authorized by the Ministry of Education of P.R. China and sponsored by University of Electronic Science and Technology of China. The JESTC, started publication home and abroad in 2003, is a periodical devoted to the purpose of providing rapid publication of original and significant contributions relating to developments in theory, technology, design, analysis, applications, etc of electronic science and technology.All ma…     

Studies and Application of Characteristics of Absorbing Materials

ＳｔｕｄｉｅｓａｎｄＡｐｐｌｉｃａｔｉｏｎｏｆＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＡｂｓｏｒｂｉｎｇＭａｔｅｒｉａｌｓＷａｎｇＸｉｎｗｅｉａｎｄＬｕＹｉｎｇｈｕａ（ＴｈｅＴｒａｉｎｉｎｇＣｅｎｔｅｒ，ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＰｏｓｔｓａｎ...     

Simulation of Power Control and Diversity of Cellular CDMA

ＳｉｍｕｌａｔｉｏｎｏｆＰｏｗｅｒＣｏｎｔｒｏｌａｎｄＤｉｖｅｒｓｉｔｙｏｆＣｅｌｌｕｌａｒＣＤＭＡＲｏｍａｎＰｉｃｈｎａ；ＱｉａｎｇＷａｎｇ；ＶｉｊａｙＫ．Ｂｈａｒｇａｖａ；ＪｉａｌｉｎＺｏｕ；ＲｏｎＫｅｒｒ（ＵｎｉｖｅｒｓｉｔｙｏｆＶｉｃｔｏｒｉ...     

Nanjing University of Posts and Telecommunications

NamingUniversityofPostsandTelecommunications,mainlybringingupqualifiedtechnicalandadministrativepersonneltothepostsandtelecommunications,isoneofthekeyuniversitiesundertheadministrationoftheMinistryofPostsandTelecommunicationsandoneofthefirstgroupofunivers…     

Theoretical and experimental studies of the current–voltage and capacitance–voltage of HEMT structures and field-effect transistors

The sensitivity of classical n ⁺/n ^– GaAs and AlGaN/GaN structures with a 2D electron gas (HEMT) and field-effect transistors based on these structures to γ-neutron exposure is studied. The levels of their radiation hardness were determined. A method for experimental study of the structures on the basis of a differential analysis of their current–voltage characteristics is developed. This method makes it possible to determine the structure of the layers in which radiation-induced defects accumulate. A procedure taking into account changes in the plate area of the experimentally measured barrier-contact capacitance associated with the emergence of clusters of radiation-induced defects that form dielectric inclusions in the 2D-electron-gas layer is presented for the first time.     

Beijing University of Posts and Telecommunications

BeijingUniversityofpostsandTelecommunications(hereinafterreferredtoasBUPT)wasfoundedin1955.LocatedinthecultureandeducationareaoftheHaidianDistrictinBeijingwhereuniversitiesstandingreatnumbers,theschoolcampusfacestheParkoftheRuinsoftheEarthCityWalloftheCap…     

Application and Self-assembly of Semiconductor Nanowire

The unique properties of semiconductor nanowires are introduced,and recent research progresses in application,self-assembly synthesis methods and mechanisms are summarized.     

Trends and Prospects of Network Convergence

The concept of the separation of service,control,bearer and access in the Next Generation Network (NGN) provides a unified architecture for the network convergence in the future. Network convergence involves service,core network,access network,terminal,and operation and maintenance convergence. In the future,the converged network’s trend is to use IP Multimedia Subsystem (IMS) at the core control layer; Internet Protocol/Multiple Protocol Label Switching (IP/MPLS) technology at the core bearer layer; unified and open service provisioning architecture at the service layer; as well as support fixed,mobile,narrowband and broadband access technologies and so on at the access layer. Terminals will evolve to be multi-modular and intelligent,and would finally enable users to access full services anytime and anywhere using one number,one terminal,one account and one core network.     

Development of DPSSL and Its Applications

1 Introduction Since the world first laser successfully developed by Maiman [1] in 1960, the research activities in this field has never been stopped. With diode laser pumping, it is possible to built higher efficiency, and therefore simpler and more compact laser in an all solid- state device. With recent progress in the development of reliable higher power diode lasers, parallel improvements in diode - pumped solid - state lasers have been made. Diode laser- pumped solid- lasers also offer …     

Standard and Research of Home Network

With the continuous development of a home network, the Consumer Electronics (CE)/IT industry has different understanding and developing thoughts from telecommunications industry. Several international and domestic organizations are actively engaged in formulating home network standards. Nowadays, the relevant standards are not unified. In China, there are three main organizations involved in home network standards: the Intelligent Grouping and Resource Sharing (IGRS) working group, ITopHome, and China Communications Standards Association (CCSA). They have made some achievements on standardization research. In order to strengthen ability of independent innovation in home network area and speed up the progress of standardization, the three organizations must break through the industrial barrier, intensify cooperation and make full use of complementary advantages to research China’s proprietary standards for home networks with a win-win attitude.     

Growth and Optical Properties of ZnO Films and Quantum Wells

研究了用MOCVD法在蓝宝石(Al2O3)(0001)和(1120)衬底上制备ZnO薄膜时的生长特性.详细研究了采用Al2O3(0001)衬底时生长温度与压力的影响.由于存在比较大的晶格失配,一般容易得到ZnO纳米结晶,不容易获得既平坦且质量又好的ZnO薄膜.生长温度对薄膜-衬底界面的生长模式有很大的影响;而生长压力对ZnO纳米结晶的形状有决定性作用.通过适当控制生长温度及压力,可以得到ZnO薄膜或不同形状的纳米结构.当采用Al2O3(1120)衬底时,由于晶格失配较小,能保持平坦层状生长,临界膜厚远远大于采用Al2O3(0001)衬底的结果.在Al2O3(1120)衬底上制作了ZnO/MgZnO量子阱并研究了其光学特性.观察到了量子化能级间以及在载流子间的跃迁引起的发光.由压电效应引起的内建电场约为3×105V/cm.同时发现采用低温低压生长可以增大ZnO中受主杂质浓度,有利于获得p型ZnO.     

The Study of the Estimate of Polyspectra and Blind Equalizers

AbstractThemaincolltCfitofthisthesisconsistsoftWopad.Insignalprocessingscenario,autocorrelationtechniquesuppressesthephaseinformationofsignal,whilePOlyspectrapreservethephaseinformationofsignal.Therefore,inthepadone,weproposethemethodswhichidentifyon...     

The Study of the Estimate of Poly-Spectra and Blind Equalizer

Themainworksanddevotionofthisthesisconsistsoftwoparts.Insignalprocessingscenario,autocorrelationtechniquesuppressesthephaseinformationofsignal,whilepoly-spectrapreservethePhaseinformationofsignal.Therefore,inpartone,weproposethemethodswhichidentifiesoneandtwodimensionFIRsystemparametersonlyfromsystemoutputs.Theusefullineartransversalblindequalizer,decision-feedbackblindequalizer,andtheKalmanblindequalizerareproposedforthenon-minimumphasechannelofdatacommunicationinparttwo.Inpartone,theLSalg…     

Investigation of Architecture and Essential Technologies of Wireless Sensor Network

The Wireless Sensor Network (WSN) is a distributed Ad-hoc network that consists of numerous and ubiquitous mini sensor nodes with the capabilities of wireless communicating and computing. The WSN is an "intelligent" system that enables self-fulfillment of…