digital audio broadcasting in satellite communication
Advances in Satellite Communications Part 1 pptx
... Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Advances in Satellite Communications, ... capabilities. In addition, a satellite link engineer has to consider the constrains of the communication channel; so many radio frequency calculations are needed, these include link budget analysis, ... Antennas in Satellite Communications Advances in Satellite Communications Edited by Masoumeh Karimi and Yuri Labrador Published by InTech Janeza Trdine 9, 51000...
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Advances in Satellite Communications Part 2 pptx
... et al., 1986; Wong & King, 1979). As the wave velocities in a finite helix are hard to calculate, those calculated for the infinite Advances in Satellite Communications 10 The existence ... lengths were varied in order to obtain a wider bandwidth with higher antenna gain. In (Skiljo et al., 2010) the axial mode bandwidth was examined by means of parameters defining the limits of ... p 2 ) 1/2 . Advances in Satellite Communications 12 The simulation results in Fig. 7 demonstrate the influence of applied materials on the antenna VSWR and gain in frequency band from 1.8-2.8...
Ngày tải lên: 19/06/2014, 19:20
Advances in Satellite Communications Part 3 doc
... z M μν (z) M μν (0)=M in μν (0), (9) Fig. 3. Model of wave propagation in an inhomogeneous random medium. 32 Advances in Satellite Communications 2 Will-be-set-by -IN- TECH Fig. 1. Spot dancing and wave ... However, because a carrier frequency becomes higher according to the increase in the required channel capacity of satellite communication links in the next generation, the analysis of the effects of ... shorter in order to achieve a phase lag of 45°. Instead of infinite balun, we proposed a stripline structure for impedance matching and the support for helical wire. Fig. 15 c) shows that matching...
Ngày tải lên: 19/06/2014, 19:20
Advances in Satellite Communications Part 4 pptx
... for Satellite Communications in Ka-band 19 Fig. 14. Average intensity for the uplink in the beam radius at the transmitting antenna w 0 = 1.2 m normalized by the intensity on a beam axis in free ... (24) 34 Advances in Satellite Communications 12 Will-be-set-by -IN- TECH 3. Results 3.1 Modulus of complex degree of coherence 3.1.1 Uplink Substituting (24) and (27) into (30), the DOC at the GEO satellite in ... predict that the increase in BER is caused by the decrease in the average received intensity due to spot dancing shown in Fig. 1. 3.2.2 Downlink For the downlink, the decrease in the spatial coherence...
Ngày tải lên: 19/06/2014, 19:20
Advances in Satellite Communications Part 5 potx
... ever-growing Internet, digital television, mobile communication or increasing video communication techniques would have been the practical developments without applying compression techniques. In ... process of representing information in a more compact form by eliminating redundancies in the original data representation (Pu, 2006). Due to the presence of redundancies in the original representation, ... antenna in order to satisfy the required EIRP from the point of view of the decrease in an in uence of atmospheric turbulence on BER in the uplink. 3.3.2 Downlink For the downlink, we can obtain BER...
Ngày tải lên: 19/06/2014, 19:20
Advances in Satellite Communications Part 6 ppt
... original form. The original block of packets will be divided into individual packets according to the original size of each combined packet. After that, these individual packets are stored in ... Advances in Satellite Communications 76 Fig. 17. The packet drop rate distribution in Scenario 2. The proposed scheme succeeds in reducing the packet drop rate by 1 – 90 percent in Scenario ... scheme in satellite network topology is shown in Figure 10 below. As stated earlier, the main objective of this research study is to overcome the limitation and constraints of satellite communication...
Ngày tải lên: 19/06/2014, 19:20
Advances in Satellite Communications Part 7 pdf
... Hybr id Satellite/ Terrestrial Networks 9 The following points must be kept in mind when selecting a GKMA: ã Protection against collusion. GMs and non-members should not be able to join their knowledge ... to ſgure 3. In the ory, for each single change in the users’ base, the TEK (K I in the ſgure) should be changed. Although grouping changes occurred in a given time interval and updating TEK once ... spreadsheet included): Industry Report, 07.04.2011, Available from http://www.mindbranch.com/listing/product/R1-4772.html Mitra, M. (2005). Satellite Communication, Prentice-Hall of India Private...
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Advances in Satellite Communications Part 8 pptx
... Satellite/ Terrestr ial Networks 21 LAN LAN Internet terrestre SsS Up-link Down-link Down-link Down-link Down-link Receiving path Receiving path Receiving path Receiving path Reaching path Return path Sr 1 Sr M Sr R Sr M-1 R 1 R M R M-1 R R Fig. ... makes it interesting in the context we are examining (Tommasi et al., 2009). One more reason of interest for the protocol is its capability to transmit information to users who can receive information ... transmission of a message M, replicating it in N packets. P i is the i-th reply in the N packets sequence. The delivery of a message is organized in two phases. During the Winding phase, the sender is restricted...
Ngày tải lên: 19/06/2014, 19:20
Advances in Satellite Communications Part 9 potx
... properly integrated in the proposed hybrid architecture. In this line and for completeness some important First Responders’ open technical communication problems are introduced relating interoperability ... point it is useful to mention some very basic facts and definitions related to On-line Detection. The subject enjoys intensive ongoing research since wireless and distributed networks are in ... decisions using identical local decision rules (Chamberland & Veeravali, 2006). As stated in (Tsitsiklis, 1993), decentralized schemes are definitely worth considering in contexts involving geographically...
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Advances in Satellite Communications Part 10 pptx
... capable in offering) real-time or nearly–real time response times for rapid information updating and Rapid Mapping activities and Surveillance including the “very urgent” imaging data downlink ... electrons incident angle, the surface material (typically aluminum), and the coating process applied to the metallic surfaces (e.g. silver-plating, alodine coating). In order to gain a physical insight ... orders of the minimum threshold voltage for a silver-plated Advances in Satellite Communications 130 and early warning on a 15 minutes basis using medium to low spatial resolution satellite...
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digital signal processors in cellular radio communications ieee
Ngày tải lên: 04/07/2014, 00:05
2595416-The-Fast-Forward-MBA-in-Business-Communication
... E-MAIL PROBLEMS LINKED TO A WRITING AND EDITING PROCESS Individual User E-mail Issues Prewriting Drafting Editing Logic Editing Layout Editing Grammar Postwriting Missing/poor subject line x Weak ... "The Fast Forward MBA in Business Communication& quot; Supply-Chain Linkages in Nonmanufacturing Environments Supply-chain-like linkage problems are also inherent in service organizations. ... Implementing Your Communications Strategy 8 Company-Level Business Communication Trends 9 Developing Effective Business Communication within Teams 10 Developing Effective Business Communication...
Ngày tải lên: 07/02/2013, 09:32