optical orthogonal frequency division multiplexing for high speed wireless optical communications
Báo cáo hóa học: " High-Speed Turbo-TCM-Coded Orthogonal Frequency-Division Multiplexing Ultra-Wideband Systems" pptx
Ngày tải lên :
22/06/2014, 22:20
... equalization and orthogonal frequency- division
multiplexing (OFDM) [4].
OFDM is a promising solution for efficiently capturing
multipath energy in highly dispersive UWB channels and de-
livering high data ... Corporation
EURASIP Journal on Wireless Communications and Networking
Volume 2006, Article ID 91329, Pages 1–12
DOI 10.1155/WCN/2006/91329
High- Speed Turbo-TCM-Coded Orthogonal
Frequenc y -Division M ultiplexing ... using orthogonal frequency division multiplexing, ”
IEEE Transactions on Communications, vol. 33, no. 7, pp. 665–
675, 1985.
[5] A. Batra, et al., “Multi-band OFDM physical layer proposal for
IEEE...
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Báo cáo hóa học: " Research Article VLSI Implementation of a Fixed-Complexity Soft-Output MIMO Detector for High-Speed Wireless" pptx
Ngày tải lên :
21/06/2014, 17:20
... low-complexity MIMO symbol detector with close-Maximum a posteriori performance for the emerging
multiantenna enhanced high- speed wireless communications. The VLSI implementation is based on a novel MIMO ... degrees
of freedom in MIMO channels. Since the multiplexing gain
is only available for high SNR region, spatial multiplexing
is usually used when high SNR is available. STBC/SFBC
[11] assumes ... technique for
wireless communications, ” IEEE Journal on Selected Areas in
Communications, vol. 16, no. 8, pp. 1451–1458, 1998.
[13] M. Siti and M. P. Fitz, “A novel soft-output layered orthogonal
lattice...
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Báo cáo hóa học: " Research Article Towards Scalable MAC Design for High-Speed Wireless LANs" ppt
Ngày tải lên :
22/06/2014, 19:20
... to high- speed wireless networks. The MAC de-
sign in high- speed wireless networks, such as IEEE 802.11n,
8 EURASIP Journal on Wireless Communications and Networking
Table 3: Analysis results for ... Corporation
EURASIP Journal on Wireless Communications and Networking
Volume 2007, Article ID 12597, 14 pages
doi:10.1155/2007/12597
Research Article
Towards Scalable MAC Design for High- Speed Wireless LANs
Yuan ... conditions, TMAC pro-
vides more transmission opportunities for high- rate stations
perceiving good channels. This feature is important for high-
speed wireless LANs and mesh networks to mitigate the se-
vere...
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Tài liệu Báo cáo khoa học: "A HARDWARE ALGORITHM FOR HIGH SPEED MORPHEME EXTRACTION AND ITS IMPLEMENTATION" pptx
Ngày tải lên :
21/02/2014, 20:20
... algorithm
for high speed morpheme extraction, and also de-
scribes its implementation on a specific machine.
This machine,
MEX.I,
is designed as the first step
313
A HARDWARE ALGORITHM
FOR HIGH ... be-
lieve it is suitable for VLSI implementation. Ac-
tually, its VLSI implementation is in progress. A
high speed morpheme extraction VLSI will im-
prove the performance of such text processing ... Step 2 for Procedure 1 are implemented in
each state for (a), (b), (c), (d), (e),
and
so on.
In state (a) for Fig. 4, the index memory's out-
put expresses the address range for the...
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Báo cáo khoa học: "Randomized Algorithms and NLP: Using Locality Sensitive Hash Function for High Speed Noun Clustering" pdf
Ngày tải lên :
08/03/2014, 04:22
... created noun similarity list.
Acknowledgement
We wish to thank USC Center for High Performance
Computing and Communications (HPCC) for help-
ing us use their cluster computers.
References
Banko, M. ... Association for Computational Linguistics
Randomized Algorithms and NLP: Using Locality Sensitive Hash Function
for High Speed Noun Clustering
Deepak Ravichandran, Patrick Pantel, and Eduard Hovy
Information ... Interestingly, cosine similarity is
widely used in NLP for various applications such as
clustering.
In this paper, we perform high speed similarity
list creation for nouns collected from a huge web
corpus....
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Báo cáo hóa học: " Research Article Pulse Interval Modulation for Ultra-High Speed IR-UWB Communications Systems" pdf
Ngày tải lên :
21/06/2014, 08:20
... modulation for optical
communications, ” IEEE Communications Magazine, vol. 36,
no. 12, pp. 95–99, 1998.
[13] T. Svedek and S. Rupcic, “Anisochronous modulation methods
for optical short-range wireless ... “Combined
pulse shape and pulse position modulation for high data rate
transmissions in ultra-wideband communications, ” Interna-
tional Journal of Wireless Information Networks,vol.10,no.4,
pp. 167–178, ... “Orthonormal
pulses for high data rate communications in indoor UWB
systems,” IEEE Communications Letters, vol. 9, no. 5, pp. 405–
407, 2005.
[4]J.A.N.daSilvaandM.L.R.deCampos,“Methodfor
obtaining...
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Báo cáo hóa học: "Research Article Design of an Omnidirectional Multibeam Transmitter for High-Speed Indoor Wireless Communications" doc
Ngày tải lên :
21/06/2014, 17:20
... of configuration E for light undergo-
ing up to five reflections.
power uniformity of the transmitter has yet to be optimized.
For high performance wireless diffuse links with uniform
power illumination ... diversity receivers for high- speed infrared
wireless communication,” IEEE Communications Magazine,
vol. 36, no. 12, pp. 88–94, 1998.
[22] P. Djahani and J. M. Kahn, “Analysis of infrared wireless links
employing ... Transactions on Communications, vol. 48, no.
12, pp. 2077–2088, 2000.
[14] J. M. Kahn, R. You, P. Djahani, A. G. Weisbin, K. T. Beh, and
A. Tang, “Imaging diversity receivers for high- speed infrared
wireless...
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Báo cáo hóa học: " Research Article Nonlinear Frequency Scaling Algorithm for High Squint Spotlight SAR Data Processing" pdf
Ngày tải lên :
21/06/2014, 22:20
... the range-cell migration with a high- order range-
azimuth coupling form is processed by a nonlinear frequency scaling operation, which is different from the original frequency
scaling one. Due to ... nonlinear frequency scaling method is
presented. Inspired by the NCS algorithm, the FS operation
has been extended to the cubic order to perform a more accu-
rate SRC. Before the nonlinear frequency ... f
ref
= 0 before the
frequency scaling operation will simplify the expressions of
H
FS
, H
MF
,andH
AF
.
3. SIMULATION RESULTS
In order to evaluate the proposed algorithm, some simula-
tions for an...
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Báo cáo hóa học: " Research Article Development of Long-Range and High-Speed Wireless LAN for the Transmission of Telemedicine from Disaster Areas" pdf
Ngày tải lên :
22/06/2014, 06:20
... WiFi to be used in a dis-
aster, we developed long-range and high- speed wireless LAN
units to establish makeshift but high- speed wireless LAN net-
works. These networks would establish communication ... Journal on Wireless Communications and Networking
Volume 2008, Article ID 724010, 13 pages
doi:10.1155/2008/724010
Research Article
Development of Long-Range and High- Speed Wireless LAN for
the ... earthquake and to reinforce
the rescue measures for victims.
10 EURASIP Journal on Wireless Communications and Networking
(a)
(b)
Figure 16: Equipment at the main drill site: (a) wireless LAN unit
and...
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Báo cáo hóa học: " Submonolayer Quantum Dots for High Speed Surface Emitting Lasers" potx
Ngày tải lên :
22/06/2014, 18:20
... signal modulation
experiments have been performed at lower temperatures,
but the high speed performance at 85 °C is crucial for most
short-distance optical interconnect applications.
Thus, we ... simultaneously to a significant lateral
compositional modulation and high QD density [34],
resulting in a high material and modal gain.
For ultrahigh -speed directly modulated VCSEL appli-
cations it is extremely ... excellent static performance, i.e. high
external efficiency even at 85 °C, these devices demon-
strate the potential of this novel active material for
temperature stable ultra high speed VCSELs. At...
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hsdpahsupa for umts high speed radio access for mobile communications
Ngày tải lên :
01/06/2014, 09:38
... High- Speed Dedicated Physical Control CHannel
HS-DSCH High- Speed Downlink Shared CHannel
HS-PDSCH High- Speed Physical Downlink Shared CHannel
HS-SCCH High- Speed Shared Control CHannel
HSDPA High- Speed ... Control CHannel
HSDPA High- Speed Downlink Packet Access
HSPA High- Speed Packet Access
HSUPA High- Speed Uplink Packet Access
Abbreviations xvii
Higher cell capacity and higher spectral efficiency ... radio access has evolved strongly alongside high- speed downlink packet
access (HSDPA) and high- speed uplink packet access (HSUPA), together called high-
speed packet access’ (HSPA). When the International...
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Báo cáo hóa học: " Research Article Novel Techniques of Single-Carrier Frequency-Domain Equalization for Optical Wireless Communications" doc
Ngày tải lên :
21/06/2014, 08:20
... carrier frequency domain equalization (SCFDE) over a diffuse optical wireless (DOW)
communications. Recently orthogonal frequency division multiplexing (OFDM) has been applied to DOW communications.
However, ... growing interest for use in
indoor wireless data transmission [1, 2]. Diffuse optical
wireless (DOW) communications offer a viable alternative
to radio frequency (RF) communication for indoor use ... receivers for optical signals. These
opto electronic devices are cheaper as compared to RF
equipments.
Orthogonal frequency division multiplexing (OFDM)
modulation is a promising modulation scheme for...
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Báo cáo sinh học: " Research Article Time-Frequency Based Channel Estimation for High-Mobility OFDM Systems—Part II: Cooperative Relaying Case" pptx
Ngày tải lên :
21/06/2014, 16:20
... performance
for
−40 and 40 dB and obtain better results for
G
SR
/G
RD
= 0dB as in the individual channel
estimation case. We show the BER performance for
G
SR
/G
RD
={−40, 0,40}dB,aswellasfortheperfect
CSI ... Transactions on Information Theory, vol. 50,
no. 12, pp. 3062–3080, 2004.
[4] H. Do
ˇ
gan, “Maximum a posteriori channel estimation for
cooperative diversity orthogonal frequency- division multi-
plexing ... “Channel estimation for
amplify-and-forward relaying: Cascaded against disintegrated
estimators,” IET Communications, vol. 4, no. 10, pp. 1207–
1216, 2010.
[8] J. W. Mark and W. Zhuang, Wireless Communication...
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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
... Journal on Wireless Communications and Networking
Volume 2007, Article ID 20258, 11 pages
doi:10.1155/2007/20258
Research Article
Practical Quantize-and-Forward Schemes for
the Frequency Division ... assertion can be proven for the two combiners pro-
vided in this paper, for more information see [12]). There-
fore, one has to keep in mind that in quasistatic channels
the performance gain due to ... optimum representa-
tives for fixed transition levels and optimum transition lev-
els for fixed representatives can be found. For a 4-QAM
2 EURASIP Journal on Wireless Communications and Networking
SNRs...
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Báo cáo hóa học: " Joint Downlink Power Control and Multicode Receivers for Downlink Transmissions in High Speed UMTS" pot
Ngày tải lên :
22/06/2014, 22:20
... for a multimedia CDMA wireless
system,” in Proceedings of 6th IEEE International Symposium
on Personal, Indoor and Mobile Radio Communications, Wire-
less: Merging onto the Information Superhighway ... beam-
forming for wireless network is proposed in [17] where it is
shown that a capacity increase is possible if array observa-
tions are combined in the MMSE sense. Therefore, as a di-
rection for ... (2002-03), High Speed Downlink
Packet Access: Physical layer aspects, (Release 5)”.
[3] B. Sayadi and I. Fijalkow, “Joint detection for multicode trans-
mission in downlink high speed UMTS,”...
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