mobile and broadband communications

... ever-increasing demand for bandwidth and scarcity of the wireless spectrum, and partly to the decreasing cost of millimetre-wave monolithic integrated circuits (MMIC) which make transmitting and receiving ... in this band and regulatory requirements limit the communication range for outdoor applications The recent allocation of the E-band spectrum (71-76 and 81-86 GHz) in USA, Europe, Russia and Australia ... (IF) signal for each channel in the second Nyquist band The bands are translated in frequency and combined with the band edges abutting No guard bands are needed because of the spectral limiting

Ngày tải lên: 21/06/2014, 14:20

... acceptable situation and how it affects the practical design Based on the 4 4 MIMO ray tracing model above, the relation between condition number and antenna spacing is investigated and shown in Fig ... acceptable situation and how it affects the practical design Based on the 4 4 MIMO ray tracing model above, the relation between condition number and antenna spacing is investigated and shown in Fig ... q p q p q p q jV k a R k a k a      (29) where R p q, and p q, are the distance and the angle between the p transmit antenna and the q receive antenna respectively The antenna directivity

Ngày tải lên: 21/06/2014, 14:20

... limited range and features, was introduced In the 1990s, a second generation (2G) of mobile phones was presented with digital voice/data and with higher data transfer rates, expanded range, and more ... anytime and anywhere with people but also for data downloading/uploading It is now time to explore new demands and to find new ways to extend the mobile wireless concept The evolution of 3G mobile ... between r-the r-r-th relay and r-the i-r-th destination are denoted by h i,r (l) and g r,i (l), respectively Both h i,r (l) and g r,i (l) are zero mean complex Gaussian random and their variances

Ngày tải lên: 21/06/2014, 14:20

... Trang 1A Unified Data and Energy Model for Wireless Communication with Moving Senders and Fixed Receivers Armin Veichtlbauer and Peter Dorfinger X A Unified Data and Energy Model for Wireless ... Data and Energy Model” for wireless communication takes into account both its energy and its data balance, i.e it calculates the amount of successfully transmitted and lost data per time unit and ... Data and Energy Model” for wireless communication takes into account both its energy and its data balance, i.e it calculates the amount of successfully transmitted and lost data per time unit and

Ngày tải lên: 21/06/2014, 14:20

... GAP, SDAP and SPP Further the SDP, RFCOMM and the L2CAP profiles must be supported and accessibility for the API of these protocol layers must exist The access on the lower hardware and protocol ... GAP, SDAP and SPP Further the SDP, RFCOMM and the L2CAP profiles must be supported and accessibility for the API of these protocol layers must exist The access on the lower hardware and protocol ... Messaging API a mobile application can react on SMS and MMS messages, which are addressed to a certain port of the mobile phone, to which the application has registered itself, and process the

Ngày tải lên: 21/06/2014, 18:20

... providing IMT-2000 in the bands 1885-1980 MHz, 2010-2025 MHz and 2110-2170 MHz in the Regions 1 and 3 and 1885-1980 MHz and 2110-2160 MHz in Region 2 International Telecommunications Union, 2000. ... providing IMT-2000 in the bands 1885-1980 MHz, 2010-2025 MHz and 2110-2170 MHz in the Regions 1 and 3 and 1885-1980 MHz and 2110-2160 MHz in Region 2 International Telecommunications Union, 2000. ... terrestrial UMTS network: interference analysis and cell dimensioning International Journal Wireless Personal Communications - Special Issue on Broadband Mobile Terrestrial-Satellite Integrated Systems,

Ngày tải lên: 21/06/2014, 19:20

... ala abba div H / is by block and not by column It is only necessary to Trang 8calculate the odd rows and columns of matrices Qdiv and Rdiv It can be seen as aladiv H and abba div H have the same ... nB do n i min arg :2:2  6: Exchange columns i and i+1 for k and k+1 of Qdiv and Rdiv 7: Exchange columns m  Li :  1 : m  i ( L  1 )  1 and m  Lk :  1 : m  k ( L  1 )  1 of order ... nB do n i min arg :2:2  6: Exchange columns i and i+1 for k and k+1 of Qdiv and Rdiv 7: Exchange columns m  Li :  1 : m  i ( L  1 )  1 and m  Lk :  1 : m  k ( L  1 )  1 of order

Ngày tải lên: 21/06/2014, 19:20

... (2005) Air Interface for Fixed and Mobile Broadband Wireless Access Systems J Chuang and N Sollenberger, Beyond 3G (2000): wideband wireless data access based on OFDM and dynamic packet assignment, ... Equalization for Single Carrier Broadband Wireless Systems, IEEE Commun Magazine, pp 58-66 F Adachi; D Garg; S Takaoka & K Takeda (2005) Broadband CDMA Technique, IEEE Wireless Communications, no 4, ... subblock and phase factor b M) A sim-ilar technique was also proposed by Jayalath and Tellambura (16) The difference between the Jayalath and Tellambura’s technique and that of Cimini and Sollenberger

Ngày tải lên: 21/06/2014, 19:20

... where  is a Gaussian random variable with mean m s and variance s for users in soft handoff region and m h and h for users in hard region Due to macro diversity in soft handoff region, users ... distribution, that is:   1010 where  is a Gaussian random variable with mean m s and variance s for users in soft handoff region and m h and h for users in hard region Due to macro diversity ... characteristics such as processing gain (G) and interference margin () Consequently, if Z is modelled as a Gaussian random variable and considering s and h users in the soft and hard regions, respectively,

Ngày tải lên: 21/06/2014, 19:20

... wideband transmission; it is protected from jamming transmission and has low probability of interception The improvement proposal is meant to combine the advantage in of both narrowband and wideband ... wideband transmission; it is protected from jamming transmission and has low probability of interception The improvement proposal is meant to combine the advantage in of both narrowband and wideband ... developed test bed and EMC measurements, and its performance has been analyzed Reliable and low latency wireless communication ensures smooth and accurate control of fast dynamic process and is critical

Ngày tải lên: 21/06/2014, 19:20

... MULTIPLE ANTENNAS AND BLOCK SPREADING FORMOBILE BROADBAND COMMUNICATIONS NATIONAL UNIVERSITY OF SINGAPORE 2013 Trang 2I hereby declare that this thesis is my original work and it has been written ... media, mobile gaming and video stream-ing services as well as the prevalent of the mobile computing devices such assmartphones and tablets, consumers are increasingly demanding higher dataspeed and ... this thesis, we study and propose enhancements to improve the performance of interleaved frequency division multiple access (IFDMA) in the uplink mission of mobile broadband system Our theoretical

Ngày tải lên: 08/09/2015, 18:24

... transmit and process all types of data and information Both the technology and the technical standards or- ganizations are driving toward integrated public systems that make virtually all data and ... wide area voice and data networks Wireless networks provide advantages in the areas of mobility and ease of installation and configuration Chapters 14 and 17 deal with wireless WANs and LANs, respectively ... transferring data and com- mands, the file transfer modules each rely on a communications service module This module is responsible for making sure that the file transfer commands and data are reliably

Ngày tải lên: 13/09/2012, 10:21

... CS5.5 Mobile and Web Development with HTML5, CSS3, and jQuery Harness the cutting edge features of Dreamweaver for mobile and web development David Karlins Trang 3Dreamweaver CS5.5 Mobile and Web ... Graphic Design, and has been a professional web developer and user experience designer for over seven years He has developed websites and mobile applications for iOS, Android, and Windows Phone ... Creating Mobile Pages with jQuery 189 Trang 15Adding new jQuery Mobile pages and objects 203Customizing mobile page CSS styles 205 Looking ahead: Generating mobile apps 210 Recipe: Build a mobile

Ngày tải lên: 06/03/2014, 00:20

... Ian Fenn, Matthew Keeler and the folks at the University of Bath and Bristol Usability Group, Brenda Bazylewski, and the dozens of other people who’ve contributed, helped, and inspired me Trang ... the cartridge, and switch it on At which point the printer informed me that it would like to join my WiFi network and could it have a password, please? And that was it The printer and my computer ... finding out how it works and exploring new features If you’re making a mobile phone, these are the people who want to be able to browse through the mobile phone’s file system and tweak everything

Ngày tải lên: 31/03/2014, 16:49

... Debeljuh Mobile and Wireless Communications: Network layer and circuit level design, Edited by Salma Ait Fares and Fumiyuki Adachi p. cm. ISBN 978-953-307-042-1 Mobile and Wireless Communications: Networklayer and circuitleveldesign6 ... large bandwidth and low power consumption. This second part of the book, Mobile and Wireless Communications: Key Technologies and Future Applications, covers the recent development in ad hoc and ... for every cell and the analysis may be limited to only a single cell. Mobile and Wireless Communications: Network layer and circuit level design Edited by Salma Ait Fares and Fumiyuki Adachi In-Tech...

Ngày tải lên: 21/06/2014, 14:20

... narrow-band spread spectrum CDMA scheme for cellular communication was first proposed by Cooper and Nettleton in 1978 (Scholtz 1994) and then 3 Mobile and Wireless Communications: Networklayer and circuitleveldesign28 ... Multimedia Mobile Network. IEEE Transactions on Wireless Communications, 6 (2), 515-525. Mobile and Wireless Communications: Networklayer and circuitleveldesign38 developed to the IS-95 and CDMA2000 ... Zander et al. in (Zander 1992). This work was further investigated by Grandhi et al. (Grandhi, Vijayan et al. 1993; Grandhi, Vijayan et al. 1994; Grandhi, Yates et al. 1997) and the Distributed...

Ngày tải lên: 21/06/2014, 14:20

... 170 m range, and 15 kb/s RF bit rate, optionally 100 kb/s. The first generation Mobile and Wireless Communications: Networklayer and circuitleveldesign60 Mobile and Wireless Communications: Networklayer and circuitleveldesign76 3.3 ... IQMESH protocol description and its specifications will be publicly open and available in June 2009 (Microrisc 2009a). Mobile and Wireless Communications: Networklayer and circuitleveldesign52 ... is for home automation and the second one is for industrial automation. Communications standards and communication protocols exist in both of these lines. One such standardized protocol is,...

Ngày tải lên: 21/06/2014, 14:20

... more and more bandwidth. There is growing need for broadband high gain communication systems in the X band range of frequencies (8 - 12 GHz) for terrestrial broadband communications and networking ... coefficient in dB) and VSWR (voltage standing wave ratio) parameters are plotted for an optimum antenna, as in Fig. 3. Mobile and Wireless Communications: Networklayer and circuitleveldesign120 ... 1053-5888 Mobile and Wireless Communications: Networklayer and circuitleveldesign138 more important for wideband applications, which require thicker substrates. On the other hand, the...

Ngày tải lên: 21/06/2014, 14:20

... antenna bandwidth was achieved. However, several other applications of wireless communications require broadband and even ultawideband antenna rather than directional one. Broad band antennas ... state and OFF state are presented in figures 24 and 25, respectively. The antenna gain over the whole band is presented in figure 26. Mobile and Wireless Communications: Networklayer and circuitleveldesign184 7.2.1 ... H-plane and eight shaped in the E-plane. Following are examples about broad band and UWA antenna designs. 5.5 Examples on braodband and UWB microstrip antenna designs 5.5.1 Broad band antenna...

Ngày tải lên: 21/06/2014, 14:20

... (Lines) Simulated and (circles) measured S-parameters of a 8x125-μm GaN HEMT at (a) V GS = −2.0 V and V DS = 9.0 V and (b) V GS = −3.0 V and V DS = 21.0 V. Mobile and Wireless Communications: Networklayer and circuitleveldesign212 ... with adequate gain and bandwidth in low- voltage CMOS process are preserved. Hence, techniques of feedback and feedforward Mobile and Wireless Communications: Networklayer and circuitleveldesign226 ... Kassel. Mobile and Wireless Communications: Networklayer and circuitleveldesign222 (a) (b) Fig. 3. Hartley (a) and Weaver (b) image-reject architectures Basic Hartley and Weaver...

Ngày tải lên: 21/06/2014, 14:20