orthogonal frequency division multiplexing ofdm tutorial and analysis
Báo cáo hóa học: " Research Article Super-Orthogonal Block Codes with Multichannel Equalisation and OFDM in Frequency Selective Fading" pdf
Ngày tải lên :
21/06/2014, 17:20
... information. The super -orthogonal block
coding schemes with OFDM (i.e., SOSTTC -OFDM and
SOSFTC -OFDM) are assumed to have a bandwidth of 1 MHz
and 128 OFDM subcarriers (i.e., for SOSTTC -OFDM, the
frame ... 8 and 9,
the FER performance of, respectively, the sixteen-state super-
orthogonal block coding OFDM schemes (i.e., SOSTTC-
OFDM and SOSFTC -OFDM systems) sixteen-state STTC-
OFDM and STBC OFDM ... FNS
channel. In OFDM environments, the authors consider two forms of the super -orthogonal block codes, namely, super -orthogonal
space-time trellis-coded OFDM and super -orthogonal space -frequency trellis-coded...
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Báo cáo hóa học: " A Frame Synchronization and Frequency Offset Estimation Algorithm for OFDM System and its Analysis" pdf
Ngày tải lên :
22/06/2014, 22:20
... Communications and Networking
Volume 2006, Article ID 57018, Pages 1–16
DOI 10.1155/WCN/2006/57018
A Frame Synchronization and Frequency Offset Estimation
Algorithm for OFDM System and its Analysis
Ch. Nanda ... Hyung-Myung Kim
Orthogonal frequency division multiplexing (OFDM) is a parallel transmission scheme for transmitting data at very high rates
over time dispersive radio channels. In an OFDM system, ... unrestricted use, distribution, and reproduction in any medium, provided the original work is
properly cited.
1. INTRODUCTION
Orthogonal frequency division multiplexing (OFDM) is a
multicarrier modulation...
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Báo cáo sinh học: " Probability distribution analysis of M-QAM-modulated OFDM symbol and reconstruction of distorted data" pptx
Ngày tải lên :
18/06/2014, 22:20
... both in-band and out-of-band. In-band distortion results in an error performance degradation, while
out-of-band radiation reduces spectral efficiency. Filtering methods can reduce out-of-band radiation, ... that N samples of the time domain orthogonal frequency division multiplexing (OFDM)
symbols have an identical Gaussian probability distribution (PD) in the real and imaginary parts. In this article,
we ... symbols
An OFDM signal in the time domain is the sum of N independent signals over sub-channels of equal
bandwidth 1/(T + T
cp
) and regularly spaced with frequency 1/(T + T
cp
), where T is the orthogonality
perio...
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báo cáo hóa học:" Probability distribution analysis of M-QAM-modulated OFDM symbol and reconstruction of distorted data" potx
Ngày tải lên :
20/06/2014, 04:20
... both in-band and out-of-band. In-band distortion results in an error performance degradation, while
out-of-band radiation reduces spectral efficiency. Filtering methods can reduce out-of-band radiation, ... that N samples of the time domain orthogonal frequency division multiplexing (OFDM)
symbols have an identical Gaussian probability distribution (PD) in the real and imaginary parts. In this article,
we ... symbols
An OFDM signal in the time domain is the sum of N independent signals over sub-channels of equal
bandwidth 1/(T + T
cp
) and regularly spaced with frequency 1/(T + T
cp
), where T is the orthogonality
perio...
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- 0
Báo cáo toán học: " Probability distribution analysis of M-QAMmodulated OFDM symbol and reconstruction of distorted data" ppt
Ngày tải lên :
20/06/2014, 21:20
... both in-band and
out-of-band. In-band distortion results in an error per-
formance degradation, while out-of-band radiation
reduces spectral efficiency. Filtering methods can reduce
out-of-band radiation, ... that N samples of the time domain orthogonal frequ ency division multiplexing (OFDM)
symbols have an identical Gaussian probability distribution (PD) in the real and imaginary parts. In this article, ... level.
Keywords: OFDM, discrete probability distribution, M-QAM, nonl inear amplifier, data reconstruction.
1 Introduction
A significant drawback of orthogona l frequency division
multiplexing (OFDM) -based...
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Báo cáo hóa học: " Research Article Practical Quantize-and-Forward Schemes for the Frequency Division Relay Channel" potx
Ngày tải lên :
22/06/2014, 00:20
... D stands for decoder, which
jointly incorporates the demodulation and de-quantization
operations. On the other hand, when the relay amplifies-
and- forward, D is the identity operator and Q and ... notation is dened above. Orthogonality between
the received cooperation signal y
rd
and direct signal y
sd
can
be implemented by frequency division (FD). The optimal
bandwidth allocation issue ... E[
|x
r
|
2
] = 1, and f
R
β
(· )and f
I
β
(·)aredefinedidenti-
cally since the real and imaginary parts are assumed to be
i.i.d. Due to the fact that the data and noise are independent
and by calculating...
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A Study of Channel Estimation for OFDM Systems and System Capacity for MIMO-OFDM Systems
Ngày tải lên :
20/11/2012, 11:28
... channel estimation for orthogonal frequency- division
multiplexing (OFDM) systems and the multiple-input multiple-output orthogonal
frequency- division multiplexing (MIMO -OFDM) system capacity. ... of
OFDM subcarriers,
f
k
is the frequency of the
k
-th subcarrier,
f
o
is the lowest frequency
which corresponds to the first subcarrier. For the baseband OFDM system, the lowest
frequency ... continuous OFDM systems.
(c) The frequency division for OFDM systems.
Fig 2.9: The continuous OFDM system model.
As shown in Fig 2.9(a), the transmitted signal x
i
(t) for OFDM systems...
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Review and analysis of renewable energy perspectives in Serbia
Ngày tải lên :
05/09/2013, 16:10
... energy sector, its electricity and heat transmission and distribution characteristics and its
energy production and consumption features. Section 3 provides a detailed analysis of the RES potential ... final electricity and heat consumption, for the years 2004 -2006 and the electricity
generation structure and gross consumption for 2009 are presented in Table 6 and Figures 1 and 2
respectively. ... of energy policy and modelling, development & administration of DSS and in lectures and seminars of the NTUA and the
Technical Chamber of Greece regarding energy policy and DSS. He has 35...
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E-Recruiting Categories and Analysis of Fortune 100 Career Web Sites
Ngày tải lên :
24/10/2013, 08:20
... Group Inc. is prohibited.
and off-line interview and test tools, and then the company conducts an online
pre-employment background check and makes a job offer to the best candi-
date.
Categories ... Category and
Location are the most widely supported job attributes by the search engine (78
and 74 Web sites, respectively). Searches for Job Type and Experience are the
least supported (25 and 17 ... Wall Street Journal
brand. CareerJournal.com provides recruiters and job seekers with a database
of job openings and résumés, as well as salary information, career news, and
industry trends. The...
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Tài liệu Advanced Calculus and Analysis MA1002 ppt
Ngày tải lên :
12/12/2013, 04:15
... functions such as sin, cos and tan; their reciprocals sec, cosec and cot; and exp
and log.
5.4. Proposition. Let f and g be differentiable at a,andletkbe a constant. Then k.f,
f + g and fg are differentiable ... the book list can give you more information, and the first tutorial sheet is
designed to give you practice. And ask in tutorial if you don’t understand something here.
1.1 The Need for Good Foundations
It ... THE REAL NUMBERS 3
Multiplication: In the same way, multiplication and division behave as we expect, and
interact with addition and subtraction in the usual way. So we have rules such as
a(b +...
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Tài liệu Coarse Wavelength Division Multiplexing (CWDM) docx
Ngày tải lên :
21/12/2013, 07:17
...
extraordinary demands
on today’s networks,
requiring more fiber and
bandwidth than ever before.
Market studies indicate that
the accrued expense to deploy
new fiber cable translates into
thousands ... CWDM
HEADEND
RESIDENTIAL
Optical
Node
Hub
Hub
Hub
Hub
Optical
Node
Optical
Node
Optical
Node
INDUSTRIAL
WIRELESS
HANDOFF
HIGH-RISE MDU/
BUSINESS
Satellite
Uplink
F
i
b
e
r
L
i
n
e
W
a
v
e
l
e
n
g
t
h
s
The CWDM Advantage
ADC Coarse Wave Division Multiplexing (CWDM) Solutions, ...
without adding additional fiber
• Enables out-of-band testing—simply dedicate a separate wavelength for testing and
monitoring
ã Installs easilyand maintenance is just as simple
The evolution...
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Tài liệu TCP/IP Tutorial and Technical Overview ppt
Ngày tải lên :
23/12/2013, 02:19
... Steering Group (IESG)
and is further organized in the form of Areas and Working Groups where new
specifications are discussed and new standards are propsoed.
The Internet Standards Process, described ... Internet Standards Process are:
Technical excellence
Prior implementation and testing
Clear, concise, and easily understood documentation
Openness and fairness
Timeliness
16
TCP/IP Tutorial ... standards, and on the Internet Assigned Numbers Authority (IANA) for
coordinating values shared among multiple protocols. The RFC Editor is
responsible for reviewing and publishing new standards...
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