wireless multiple access protocols in mobile computing pdf
Multiple Access Protocols for Mobile Communications - GPRS, UMTS and Beyond
Ngày tải lên :
02/03/2013, 16:59
... extremely
large in the case of unconstrained channel access, resulting in a low inherent statistical
multiplexing gain. By combining CDMA with PRMA, it is possible to control the access
of users ... (P
loss
)
max
in multiples of σ
K
d Hamming distance
d
il
Interleaving depth
d
min
Minimum Hamming distance
e Error correcting capability of an (L, B, e) block code; also 2.718 282
f
CAF
Channel access ... frequency channels) in GSM
MAI Multiple Access Interference
MAIO Mobile Allocation Index Offset (for frequency hopping in GSM)
MBS Mobile Broadband System
MCS-1 Modulation and Coding Scheme 1 (for...
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báo cáo hóa học:" Multiple access communications in future-generation wireless networks" potx
Ngày tải lên :
21/06/2014, 17:20
... “Polarization Division Multiple Access With Polarization
Modulation for LOS Wireless Communications” by Bin Cao, Qin-Yu Zhang,
and Lin Jin discusses a potential multiple access and modulation ... fair and
efficient wireless access in challenging interference scenarios, for example,
multiple networks deployed in the same geographical area and sharing a
common band.
In 1976, an ALOHA ... algorithm increases only linearly
with the number of users. In this algorithm, the different CFOs from different
users destroy the orthogonality among training sequences and introduce
multiple access...
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Báo cáo hóa học: "Review Article Multicast Routing Protocols in Mobile Ad Hoc Networks: A Comparative Survey and Taxonomy Osamah S. Badarneh and Michel Kadoch" pdf
Ngày tải lên :
21/06/2014, 22:20
... session
termination
Sends leave
message
JoinAck
JoinReq
JoinReq
JoinAck
Join Reply
Join Request
Receiver
Node
Y
Join Reply
Join Request
Downstream node detects
a link failure sends
JoinReq
JoinAck
Join ... broadcast joining tables to create and maintain
the forwarding group FG. The joining table has the same
2 EURASIP Journal on Wireless Communications and Networking
factors. In addition, multicasting ... network.
These protocols require each node to maintain one or more
table(s) to store routing information. In order to maintain a
consistent network view, updates to the routing information
tables...
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Tài liệu Lab 11.2.3d Multiple Access Lists Functions (Challenge Lab) pdf
Ngày tải lên :
18/01/2014, 05:20
...
Outgoing access list is ________
Inbound access list is ________
Interface __________
Outgoing access list is ________
Inbound access list is ________
Interface __________
Outgoing access ... Telnet to the Internet (host 3).
d. Now that the infrastructure is in place, it is time to begin securing the internetwork.
Step 5 Secure the Intranet Server
a. Host #4 represents an internal web ... telnet to the routers
Step 7 Deter Internet Abuse
a. There have also been some complaints that employees have been abusing Internet access.
They have been accessing sites with questionable content....
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Báo cáo hóa học: " Research Article Partial Interference and Its Performance Impact on Wireless Multiple Access Networks" potx
Ngày tải lên :
21/06/2014, 11:20
... 3.
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ink 2
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1
, boundary of stability region with link 1 in nitely backlogged
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(b) F
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, boundary of stability region with link 2 in nitely backlogged
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Partial interference
Binary interference
Stability region of slotted ALOHA
(a) p
1
= p
2
= 0.2
0
0.2
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Báo cáo sinh học: " Decentralized estimation over orthogonal multiple- access fading channels in wireless sensor networks-- optimal and suboptimal estimators" pot
Ngày tải lên :
18/06/2014, 22:20
... discussed, inserting training symbols is a heuristic way to improve the performance. It is shown in the
25
Decentralized estimation over orthogonal multiple-
access fading channels in wireless ... communication SNR levels. It
is interesting to see that using more training symbols does not improve the performance of the MLE as
expected, because inserting training symbols will reduce the energy ... ts in [19], in di cate
that the separate source-channel coding scheme is optimal in fading channels with orthogonal multiple- access
protocols, which outperforms AF transmission, a simple joint...
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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
... communication SNR levels. It
is interesting to see that using more training symbols does not improve the performance of the MLE as
expected, because inserting training symbols will reduce the energy ... first inequality in (76) and t he second inequality in (77) are satisfied. From the condition
f(θ)(θ − Φ) < 0, it is not hard to find that the second inequality in (76) and the first inequality in ... Furthermore, since the estimation quality of the first stage is available, we use BLUE to obtain
ˆ
θ for exploiting the quality information instead of using the MLE in the M-step as in the standard...
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Báo cáo hóa học: " Editorial Wireless Access in Vehicular Environmen" pdf
Ngày tải lên :
21/06/2014, 20:20
... Hindawi Publishing Corporation
EURASIP Journal on Wireless Communications and Networking
Volume 2009, Article ID 576217, 2 pages
doi:10.1155/2009/576217
Editorial
Wireless Access in Vehicular ... safety services, and Internet
access. Operating at 5.850–5.925 GHz, WAVE systems adopt
orthogonal frequency-division multiplexing (OFDM) and
achieve data rates of 6–27 Mbs/s. In WAVE systems, an ... when adopting multiple- input multiple-
output (MIMO), smart antenna and beamforming, adaptive
modulation, novel network configuration (delay tolerance
networks, DTN), effective media access control...
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Tài liệu Báo cáo khoa học: "A Multimodal Interface for Access to Content in the Home" pdf
Ngày tải lên :
20/02/2014, 12:20
... alignment of multimodal
inputs, multimodal integration, and language un-
derstanding within a single mechanism. The result-
ing combined meaning representation (represented
in XML) is passed back ... presented on a mobile
tablet which supports speech and pen input, includ-
ing both pointing and handwriting (Figure 1). Our
application task also differs, focusing on search
and browsing of a large ... n.s.
Input modality preference: During the inter-
view, 55% of users reported preferring the pointing
(GUI) input modality over speech and multimodal
input. When asked about handwriting, most...
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Tài liệu Báo cáo khoa học: "Multiple Default Inheritance in a Unification-Based" pdf
Ngày tải lên :
20/02/2014, 21:20
... example. Multiple
inheritance permits the two types of information
to be separated by isolating them in distinct sub-
hierarchies.
The question to be resolved in systems em-
ploying multiple inheritance ...
from one end, changing the remainder, and then
replacing the first string. In this section we show
briefly how unification, string concatenation, and
defensible inheritance combine to permit the ... st~ng-predicste macros, in particular OK,
must be defined in order to ester for the ~ range of spelling
changes observed in verbal inflee~on.
# Class verb_spelling (verb)
I
!Final_T(<base>,P)...
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mobile mini robots for engineering, Vol.6, No.1 Published in Australia© 2002 pdf
Ngày tải lên :
05/03/2014, 15:20
... train the students in telematics, techniques of the
rapidly growing teleservicing market has been incor-
porated utilising an infrastructure to remotely control
the mobile robots via the Internet ... find the guidance
line from any starting location.
- Implementation of methods to follow the lines
in a known environment towards the target,
despite line crossings and a random starting
point.
- ... education in system
engineering topics, motivated by industrial applications.
79
© 2002 UICEEGlobal J. of Engng. Educ., Vol.6, No.1
Published in Australia
INTRODUCTION
In industry, engineers usually...
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Network Security Protocols in Practice Part II pdf
Ngày tải lên :
06/03/2014, 16:20
... E
KU,V
(t
5
+1)
Three Phases in Single-Realm
Kerberos
J. Wang. Computer Network Security Theory and Practice. Springer 2009
Phase 2
Server sends the following information to the client:
1. ... public-key encryption (to distinguish
conventional encryption E)
Should Alice want M to remain confidential during
transmission
Send to Bob
After getting this string, Bob first decrypts to ... Springer 2009
Phase 1b: Server Hello Message
1. Version number, V
S
:
V
S
= min {V
Client
,V}
Highest SSL version installed at
server-side
2. Pseudo Random string, r
s
32-byte string...
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Advances in mobile radio access networks artech house publishers jun 2005 ebook ling
Ngày tải lên :
18/04/2014, 10:43
... 1-58053-727-8
10 9 8 7 6 5 4 3 2 1
TEAM LinG
30 Advances in Mobile Radio Access Networks
increase the efficiency of power amplifiers while maintaining linearity. Since the
efficiency of the state-of-the-art ...
Figure 2.6 PA Consulting’s software radio-based WCDMA base station.
TEAM LinG
Advances in Mobile
Radio Access Networks
TEAM LinG
TEAM LinG
62 Advances in Mobile Radio Access Networks
... UE-based solution maintains a fully functional GPS receiver
in the terminal. This requires the same functionality as described in terminal-
assisted GPS, plus additional means for computing the position...
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Báo cáo toán học: " Localization in mobile wireless and sensor networks" pot
Ngày tải lên :
20/06/2014, 21:20
... I A L Open Access
Localization in mobile wireless and sensor
networks
Monica Nicoli
1*
, Sinan Gezici
2
, Zafer Sahinoglu
3
and Henk Wymeersch
4
Accurate localization or tracking of wireless de ... a very large database of RSS fingerprints.
Machine learning techniques are employed to extract
the location information from online RSS measurements
showing promising performance for room-level ... reproduction in any medium,
provided the original work is properly cited.
al. propose a channel parameter estimator for joint com-
munications and positioning systems, using soft infor-
mation concerning...
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Báo cáo hóa học: " Research Article Slotted Gaussian Multiple Access Channel: Stable Throughput Region and Role of Side Information" pdf
Ngày tải lên :
21/06/2014, 23:20
... it
waits for in nite time). In the case of in nite SNR stability
refers to queue length being a finite multiple of log(SNR)
with probability 1. Since, increasingly large number of bits
are being served ... notion,
the problem of understanding delay in an information-
theoretic setting remains intractable, since n
→∞makes
all talk of per-bit delay irrelevant. A bit, even if it is in the
queue for finite number ... loss in achievable rates as we know less and less
information.
We further see in Lemma 3 that if we do not know
any information, we have to predecide the encoding and
decoding rates in the interior...
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