multiple access techniques for wireless communication wikipedia
Báo cáo hóa học: " Research Article An Adaptive Time-Spread Multiple-Access Policy for Wireless Sensor Networks" pot
Ngày tải lên :
22/06/2014, 19:20
... Journal on Wireless Communications and Networking
Volume 2007, Article ID 64238, 8 pages
doi:10.1155/2007/64238
Research Article
An Adaptive Time-Spread Multiple- Access Policy for
Wireless Sensor ... transmission
u
→ v (therefore, these nodes belong in S
v
∪{v}−{u})in
time slot i for which i/
∈ Ω
χ
(therefore, these nodes belong
in O
c
i,u
→v
) and for which nodes the most recent attempt for
transmission ... desirable effect for the efficient operation for
some sensor networks. The analytical results provided in this
paper derive a certain value for the access probability that al-
lows for small convergence...
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Multi-Carrier Technologies for Wireless Communication
Ngày tải lên :
02/03/2013, 16:59
... interests
include multiple access techniques, estimation theory, multi-user detection
and channel modeling.
“I am extremely grateful to my parents for the sacrifices they have made and
for imparting ... of wireless telecommunications, a
number of trends are gaining widespread popularity. Among these is the
explosion of interest in multi-carrier communications, and its application to
wireless multiple- access. ... mobiles
from TDMA (time division multiple access) to DS-CDMA (direct sequence
code division multiple access) to MC-CDMA to OFDM, while maintaining a
common hardware platform.
In this chapter, we demonstrate...
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Multiple Access Protocols for Mobile Communications - GPRS, UMTS and Beyond
Ngày tải lên :
02/03/2013, 16:59
... 44
2.5.3 Wireless Local Area Network (WLAN) 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 ... Protocol for Hybrid CDMA/TDMA 12
1.4.1 Why Combine CDMA and PRMA? 12
1.4.2 Hybrid CDMA/TDMA Multiple Access Schemes 14
1.4.3 Literature on Multiple Access Protocols for Packet CDMA 15
1.4.4 Access ... 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...
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MEMS-based Circuits and Systems for Wireless Communication docx
Ngày tải lên :
30/03/2014, 07:20
... circuits. Fundamentals of microfabrication techniques
employed for making AlN CMR are briefly introduced. Different methods for
arraying these devices and form either electrically or mechanically ... increasing
recent interest in wireless applications [41–43] has generated new efforts to
miniaturize and integrate the off-chip passives needed for filtering and frequency
generation in communication circuits. ... therefore
enabling multiple frequencies of vibration on the same silicon chip and greatly
reducing manufacturing tolerances to film thicknesses.
In general, the equivalent circuit representation for...
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channel adaptive technologies and cross layer designs for wireless systems with multiple antennas
Ngày tải lên :
01/06/2014, 07:54
... Figure P.2). For
example, the physical layer is responsible for the reliable and efficient deliv-
ery of information bits. The MAC layer is responsible for the resource man-
agement among multiple ... exp,,
()
=
()
-
()
-ã
ã
tptt2
6 BASIC CONCEPTS IN WIRELESS COMMUNICATIONS
Channel-Adaptive
Technologies and
Cross-Layer Designs
for Wireless
Systems with
Multiple Antennas
Theory and Applications
Vincent ... design: the information-theoretic approach and the practical
Routing
MAC
PHY
Routing
MAC
PHY
Communication
entity
Communication
entity
Physical
medium
Figure P.2. Layered architecture of communication...
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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
... we st ud ie d decentralized estimation for a deterministic parameter using digital communications
over orthogonal multiple- access fading channels with a multiple- bit quantizer. By introducing ... log-likelihood function for estimating θ, which can be
used for any messaging function c(x) , no matter when it describes analog or digital communications.
For digital communications, c(x) is ... suboptimal decentralized estimators in wireless sensor networks over orthogonal multiple-
access fading channels in this paper. Considering multiple- bit quantization for digital transmission, we develop
maximum...
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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
... log-likelihood function for estimating θ, which can be
used for any messaging function c(x) , no matter when it describes analog or digital communications.
For digital communications, c(x) is ... communication SNR, but it causes more errors for low SNR. For the transmission
schemes using CRC, the BER is even worse b e caus e long codes will reduce the transmission energy per
symbol. For ... training symbols will reduce the energy for the data symbols when the energy
for transmitting an observation is fixed. Our simulations show that the best performance is obtained when
L
p
= 2. This...
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báo cáo hóa học: " Data processing techniques for a wireless data transmission application via mud" ppt
Ngày tải lên :
21/06/2014, 00:20
... introduces the d ata processing techniques
for a wireless data communication via mud, which
includes the down-hole part and the surface part. As for
the down-hole data processing techniques, data encod-
ing ... 2011:45
http://asp.eurasipjournals.com/content/2011/1/45
Page 8 of 8
RESEARC H Open Access
Data processing techniques for a wireless data
transmission application via mud
Qingjie Zhao
*
, Baojun Zhang ... Processing Workshop on Signal Processing
Advances in Wireless Communications,5–8 (1997)
8. JH Zhao, LY Wang, F Li, YL Liu, An effective approach for the noise removal
of mud pulse telemetry system,...
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Báo cáo hóa học: " Research Article AWPP: A New Scheme for Wireless Access Control Proportional to Traffic Priority and Rate" pdf
Ngày tải lên :
21/06/2014, 05:20
... Standard for Infor-
mation Technology—Telecommunications and information
exchange between systems-Local and metropolitan area net-
works-Specific requirements—part 11: Wireless LAN Medium
Access ... for Higher Throughput,
2009.
[2] IEEE 802.11e WG, IEEE Standard for Information Tech-
nology—Telecommunications and Information Exchange
Between Systems—LAN/MAN Specific Requirements—part
11 Wireless ... Standard for Information
Technology—Telecommunications and Information
Exchange between systems-Local and metropolitan area
networks-Specific Requirements—part 11 :Wireless LAN
Medium Access Control...
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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
... on multiple
access networks, we propose an analytical framework to
characterize partial interference for two representative types
of multiple access wireless networks, namely, the IEEE 802.11
Wireless ... performance.
In this paper, our focus is to develop analytical mod-
els with tractable solutions for various types of wireless
multiple access networks which can accurately capture the
performance ... Wireless Communications and Networking
Volume 2010, Article ID 735083, 20 pages
doi:10.1155/2010/735083
Research Article
Partial Interference and Its Performance Impact on
Wireless Multiple Access...
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Báo cáo hóa học: " Research Article Energy-Efficient Reservation-Based Medium Access Control Protocol for Wireless Sensor Networks" doc
Ngày tải lên :
21/06/2014, 11:20
... contention-free protocols are Time Division Multiple
Access (TDMA) [12], Frequency Division Multiple Access
(FDMA) [13], and Code Division Multiple Access (CDMA)
[14].
The contention protocols ... determined for the
High Rate (HR) platform utilizing Nordic Semiconductor
nRF2401A transceiver and for the Low Rate (LR) platform
utilizing TI CC1000 transceiver.
The results for the HR platform are ... Performance analysis of IEEE 802.15.4 and
ZigBee for large-scale wireless sensor network applications,”
in Proceedings of the 3rd ACM International Workshop on Per-
formance Evaluation of Wireless...
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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
... acceptance. Fully formatted
PDF and full text (HTML) versions will be made available soon.
Multiple access communications in future-generation wireless networks
EURASIP Journal on Wireless Communications ... in Multiple Access Communications such as new
cooperative MAC protocols; spectrum sharing, and channel assignment
techniques for cognitive radio networks; new results on PHY layer multiple
access ... nonasymptotic method for
implementation of proportional differentiated admission control.
The article “Polarization Division Multiple Access With Polarization
Modulation for LOS Wireless Communications”...
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Báo cáo hóa học: " Research Article Channel MAC Protocol for Opportunistic Communication in Ad Hoc Wireless Networks'''' doc
Ngày tải lên :
21/06/2014, 22:20
... demonstrate
reliable performance for synthetic channels with stationary
parameters, performance, and complexity, investigations
for realistic channels have not been carried out for these
methods.
Based ... pages
doi:10.1155/2009/368209
Research Article
Channel MAC Protocol for Opportunistic Communication in
Ad Hoc Wireless Networks
Manzur Ashraf, Aruna Jayasuriya, and Sylvie Perreau
Institute for Telecommunications Research, Univers ... throughput. We assume the same P for all nodes.
Throughput performance of the aforementioned models
for Channel MAC is presented in Figure 5. The results are
shown for a different numbers of node...
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