digital audio broadcasting in satellite communication
Advances in Satellite Communications Part 1 pptx
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...
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
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... 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...
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Advances in Satellite Communications Part 3 doc
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... 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...
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Advances in Satellite Communications Part 4 pptx
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... 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...
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Advances in Satellite Communications Part 5 potx
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...
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...
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Advances in Satellite Communications Part 6 ppt
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... 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...
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Advances in Satellite Communications Part 7 pdf
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... 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
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... 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...
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Advances in Satellite Communications Part 9 potx
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... 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
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... 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
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and early warning on a 15 minutes basis using medium to low spatial resolution satellite...
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2595416-The-Fast-Forward-MBA-in-Business-Communication
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... 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...
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