multiple access techniques ppt satellite communication
Multiple Access Protocols for Mobile Communications - GPRS, UMTS and Beyond
Ngày tải lên :
02/03/2013, 16:59
... Standards 46
2.6 Summary 48
3 Multiple Access in Cellular Communication Systems 49
3.1 Multiple Access and the OSI Layers 49
3.2 Basic Multiple Access Schemes 53
3.3 Medium Access Control in 2G Cellular ... individual portions of
its resources to support multiple communications, basic multiple access techniques (such
as frequency-, time-, or code-division multiple access, with FDMA, TDMA, and CDMA
as their ... with multiple access protocols,which
govern access to these resources. The basic multiple access schemes are briefly described
further below in this section, and the importance of the multiple access...
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Tài liệu OPTICAL COMMUNICATION THEORY AND TECHNIQUES ppt
Ngày tải lên :
20/01/2014, 06:20
... techniques. Between 1 and 2 b/s/Hz, 4-DPSK and 4-
PSK are perhaps the most attractive techniques. At spectral efficiencies above
2 b/s/Hz, 8-PSK and 8- and 16-QAM become the most attractive techniques.
Table ... Tyrrhenian Interna-
tional Workshop on Digital Communications, held in Pisa on October 2004 as a
topical meeting on “Optical Communication Theory and Techniques , is much
indebted and wish to express ... Consortium for Telecommunications (CNIT), and without the
sponsorship of the following companies, which are gratefully acknowledged.
I
INFORMATION AND COMMUNICATION
THEORY FOR OPTICAL COMMUNICATIONS
Contents
vii
Performance...
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Communication Security - available techniques ppt
Ngày tải lên :
05/03/2014, 23:20
... available techniques
Axis Communications WHITE PAPER Communication Security
- available techniques
Figure 1: Eve can intercept and eavesdrop on communication ... 2003-02-24 9
Axis Communications WHITE PAPER Communication Security
- available techniques
Rev: 1.01, Last updated 2003-02-24 14
Axis Communications WHITE PAPER Communication Security ... normal communication features are available (Figure 11).
Rev: 1.01, Last updated 2003-02-24 11
Axis Communications WHITE PAPER Communication Security
- available techniques...
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Advances in Satellite Communications Part 6 ppt
Ngày tải lên :
19/06/2014, 19:20
... 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 ...
determined.
Advances in Satellite Communications
66
4.3.1.1 Adaptive Compression Environment (ACE)
Adaptive Compression Environment (ACE) intercepts program communication and applies
on-the-fly ... load may be increased and network congestion
may occur when works under satellite network.
Advances in Satellite Communications
76
Fig. 17. The packet drop rate distribution in Scenario...
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báo cáo hóa học:" Decentralized estimation over orthogonal multiple- access fading channels in wireless sensor networks-- optimal and suboptimal estimators" ppt
Ngày tải lên :
20/06/2014, 04:20
... (49) and (50), we
20
with the iterations any more. At low communication SNR levels, the convergent speed becomes lower.
6.2 MSE versus the communication SNR
Figure 2 d ep ic ts the MSEs of the estimators ... bound rapidly with the increasing of
the communication SNR. As expected, the MLE with AF transmission, marked as AF, is inferior to the MLE
with digital communication using 4-bits quantization, ... mit one observation, to define the communication
SNR in order to fairly compare the energy efficiency of the estimators with d iff er ent transmission schemes.
The communication SNR is d efi ne d as
γ
c
=...
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Satellite Communications Part 8 ppt
Ngày tải lên :
20/06/2014, 11:20
... password to access each software
installation. Each software installation can have a number of authorized users, for example
an administrator, owner/operator and mate.
Satellite Communications210
Fi
g
... On
n
and
it into
h
class
h
e user
e
tween
p
class
m
ber of
Satellite Communications230
standard RS232 communications port. Olfish-DDL currently caters for four different
industry ... password to access each software
installation. Each software installation can have a number of authorized users, for example
an administrator, owner/operator and mate.
Satellite Communications216
many...
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Báo cáo hóa học: " Multihop relaying and multiple antenna techniques: performance trade-offs in cellular systems" ppt
Ngày tải lên :
21/06/2014, 01:20
... Interface
for Broadband Wireless Access Systems (May 2009). IEEE Std. 802.16-2009
22. Universal mobile telecommunications system (UMTS); spatial channel model
for multiple input multiple output (MIMO) ... on Wireless Communications and Networking 2011, 2011:65
http://jwcn.eurasipjournals.com/content/2011/1/65
Page 2 of 19
RESEARCH Open Access
Multihop relaying and multiple antenna
techniques: ... Jacobson and Krzymień: Multihop relaying and
multiple antenna techniques: performance trade-offs in cellular systems.
EURASIP Journal on Wireless Communications and Networking 2011 2011:65.
Submit...
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MOB Subject 5 –Access methods Static and dynamic access techniques
Ngày tải lên :
17/09/2012, 09:13
... Baey, Fladenmuller – Subject 5
MOB Subject 5 Access methods
Static and dynamic access techniques
1. Static access techniques
1.1 Space-division multiple- access (SDMA)
When one seeks to cover a broad ... solutions are simple to introduce, but suffer from a very low yield. You lose the
multiplexing gain!
3. Dynamic access techniques
Pure Aloha: the principle of Aloha is to let talk to everyone when ... η
a
1.
1.3 Time Division Multiple Access (TDMA)
In the traditional local networks, a physical support is sharing between several users. It is thus
important to define the access rules of the media...
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Tài liệu Data Management and Access Products ppt
Ngày tải lên :
10/12/2013, 17:15
... mechanical data communication interface standard.
EIA-232/V.24 defines the narrowband, serial binary data communications channel used between leased or
dial-up modems, multiplexers or other communications ... Module without LEDs
FRONTACCESS
PANEL DTE
FRONT ACCESS
PANEL DCE
TEST
EQUIP
BREAKOUT
MODULE
PMBP-530-1 (R)
• Available for connecting, disconnecting, cross-connecting, accessing,
patching, monitoring ... Management and Access Products
www.adc.com • +1-952-938-8080 • 1-800-366-3891
EIA-232/V.24 PatchMate
™
Modules
FRONT
PANEL
ACCESS- 1
TEST
EQUIP-2
MONITOR
CIRCUITS
FRONT
PANEL
ACCESS- 2
TEST
EQUIP-1
INTERFACE
MODULE
Interface...
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Tài liệu Chapter-25-Basic network access-servers ppt
Ngày tải lên :
11/12/2013, 00:15
... /home/grog/public_html,myweb
pages, for read-only access. rsyncd accesses the module as user grog.Any host on
the 256 address block starting with 223.147.37.0 can access the data.
• Module tivo makes available ... virtual host, the server will access the main web pages
(defined by the main DocumentRoot in entry /usr/local/etc/apache /access. conf ).
Log file format
httpd logs accesses and errors to the files ... 512 Jun 314:03 pub
This enables read access to the pub directory and read-write access to the incoming
subdirectory.
• If you have a lot of files that are accessed relatively infrequently,it’spossible...
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