orthogonal frequency division multiplexing pdf
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
... the super -orthogonal block codes, namely, super -orthogonal
space-time trellis-coded OFDM and super -orthogonal space -frequency trellis-coded OFDM. The simulation results reveal that
super -orthogonal ... used to
enhance the performance of space-time codes in frequency
selective fading channels are the following:
(i) orthogonal frequency division multiplexing, that
is, multipath-induced intersymbol ... properly
cited.
Super -orthogonal block codes in space-time domain (i.e., Super -orthogonal space-time trellis codes (SOSTTCs)) were initially
designed for frequency nonselective (FNS) channels but in frequency...
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Tài liệu Coarse Wavelength Division Multiplexing (CWDM) docx
Ngày tải lên :
21/12/2013, 07:17
... Coarse Wavelength Division Multiplexing (CWDM)
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Here's How it Works
In simple ... MDU/
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The CWDM Advantage
ADC Coarse Wave Division Multiplexing (CWDM) Solutions, part of the ADC’s Value-Added Module
(VAM) family, add flexibility...
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Tài liệu ADC Coarse Wavelength Division Multiplexing (CWDM) docx
Ngày tải lên :
17/01/2014, 11:20
... Page 2
ADC Coarse Wavelength Division Multiplexing CWDM VAM Module Ordering Guide and Information
Catalog Number
CW __ __ __ - __ ... EightChannelStandard1470nm,1490nm,1510nm,1530nm,1550nm,1570nm,1590nm,
1610with1310nmupgrade.
Page 4
ADC Coarse Wavelength Division Multiplexing CWDM VAM Module Ordering Guide and Information
Application #1: Ordering a MicroVAM ... nm
1530 nm
1510 nm
1330 nm
Common Port
or Input
Optical
Components
Page 6
ADC Coarse Wavelength Division Multiplexing CWDM VAM Module Ordering Guide and Information
CWDM Module Types
WideVAM
đ
VMW
UsedwithADC8"FCMandindustry-
standard...
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Tài liệu Chapter 8 :Multiplexing pdf
Ngày tải lên :
16/02/2014, 08:20
... spectrum
❙
1 MHz or more
Frequency Division Multiplexing
❚
FDM
❚
Useful bandwidth of medium exceeds required
bandwidth of channel
❚
Each signal is modulated to a different carrier
frequency
❚
Carrier ...
Frame Structure
Synchronous Time Division
Multiplexing
❚
Data rate of medium exceeds data rate of digital
signal to be transmitted
❚
Multiple ... control
❙
Errors are detected and handled by individual channel
systems
SONET STS-1 Overhead Octets
Multiplexing
Sonet/SDH
❚
Synchronous Optical Network (ANSI)
❚
Synchronous Digital Hierarchy (ITU-T)
❚
Compatible
❚
Signal...
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Báo cáo hóa học: "Research Article Block Interleaved Frequency Division " ppt
Ngày tải lên :
21/06/2014, 22:20
... the chunk resources, so-called frequency- adaptive
(FA) transmission [9]. Adaptive Orthogonal Frequency
Division Multiple Access (OFDMA) with a chunk-based
Time Division Multiple Access (TDMA) ... equidistantly frequency- separated
blocks, each consisting of a few subcarriers, are allocated
to each user. A Discrete Fourier Transform (DFT) pre-
coding step is performed on each Orthogonal Frequency-
Division ... described
in [13], also denoted as Interleaved Frequency Division
Multiple Access (IFDMA) in the original paper [14]or
Single-Carrier Frequency Division Multiple Access (SC-
FDMA) with distributed...
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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
... w
rd
(n),
(2)
where the 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 ... in this paper are quasistatic
orthogonal relay channels for which orthogonality is defined
accordingly to [1]. Since the source-destination channel is
assumed to be orthogonal to the relay-destination ... pages
doi:10.1155/2007/20258
Research Article
Practical Quantize-and-Forward Schemes for
the Frequency Division Relay Channel
B. Djeumou,
1
S. Lasaulce,
1
and A. G. K lein
2
1
CNRS, Sup
´
el
´
ec,...
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Tài liệu OmniReach™ FTTX Solutions Wavelength Division Multiplexer Modules pdf
Ngày tải lên :
21/12/2013, 08:17
... Solutions
2
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OmniReach
FTTX Solutions
Wavelength Division Multiplexer Modules
Packet Optical
Line Terminal
Video Optical
Line Terminal
FDF
FDF
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Package Style Options and WDM Schematics
OmniReach
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FTTX Solutions
Wavelength Division Multiplexer Modules
FDF/Standard Style LGX Style MicroVAM Style 9" LGX Style
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SPEC SHEET
OmniReach
FTTX Solutions
Wavelength Division Multiplexer Modules
ADC’s OmniReach™ FTTP Solutions are the industry’s first infrastructure...
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Tài liệu FREQUENCY / PHASE EFFECTS OF ANTENNAS pdf
Ngày tải lên :
22/12/2013, 10:15
... the array. In an array, the pattern does vary considerably with frequency due to element
spacing (measured in wavelengths) and the frequency sensitivity of the phase shifting networks.
Two antennas ... 1.25 8
BW = 77.9E
L= 0.5 8
BW = 47.7E
L = 0.75 8
BW = 27.1E
L = 2.5 8
3-4.1
Figure 1. Frequency Effects
FREQUENCY / PHASE EFFECTS OF ANTENNAS
The radiation patterns of the antennas presented ... varies with frequency.
The antenna pattern depicted in Figure 1 is for the dipole pictured in Section 3-3. The maximum gain is normalized
to the outside of the polar plot and the major divisions...
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Tài liệu FREQUENCY SPECTRUM pdf
Ngày tải lên :
22/12/2013, 10:15
... referred to by band designations rather than by frequency.
Section 7-1 provides an additional breakdown of the EO/IR spectrum.
To convert from frequency (f) to wavelength (8) and vice versa, ... thumb follow:
Metric:
Wavelength in cm = 30 / frequency in GHz
For example: at 10 GHz, the wavelength = 30/10 = 3 cm
English:
Wavelength in ft = 1 / frequency in GHz
For example: at 10 GHz, the ... 8
meter
'
3x10
8
f
Hz
'
3x10
5
f
kHz
'
300
f
MHz
'
0.3
f
GHz
f
Hz
'
3x10
8
8
meter
f
kHz
'
3x10
5
8
meter
f
MHz
'
300
8
meter
f
GHz
'
0.3
8
meter
2-3.1
Figure 1. Electromagnetic Radiation Spectrum
FREQUENCY SPECTRUM
Figure 1, which follows, depicts the electromagnetic radiation spectrum and some...
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Tài liệu MIXERS AND FREQUENCY DISCRIMINATORS pdf
Ngày tải lên :
23/01/2014, 01:20
... Pass
Filter
Low Pass
Filter
6-8.1
Figure 1. Mixer Block Diagram
MIXERS AND FREQUENCY DISCRIMINATORS
Mixers are used to convert a signal from one frequency to another. This is done by combining the original ... mLO ± nRF (where m,n are integers)
C A DC output level
The desired output frequency, commonly called the intermediate frequency (IF), can be either the lower (LO-RF)
or upper (LO+RF) sideband. ... balanced mixer block diagram. The mixer diodes are reversed relative to each other; the
desired frequency (IF) components of each diode are then in-phase while the DC outputs are positive and...
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