UWB Antenna Rạgopal doc
UWB Antenna Rạgopal doc
... interests are in microstrip antennas, ultrawide
bandwidth antennas, reconfigurable antennas, feeds for reflector antennas,
waveguide horns and polarizers, phased array antennas, wire antennas, and RF
MEMS ... ultrawideband (UWB) in the year 2002. Since then the
UWB technology has progressed a lot and is still emerging. It
has created increased interest in the UWB antennas, as well.
The UWB...
Báo cáo hóa học: "A new time-hopping/direct-sequence biorthogonal PPM UWB communication system" docx
... performance of the proposed TH/
DS -UWB system will be compared with that of the con-
ventional DS -UWB system and the conventional TH/DS
UWB system. The conventional DS -UWB signal can be
expressed as ... performance. In other words, for the
conventional UWB systems employing BPPM signaling,
DS -UWB system is more effective to combat MAI than
the TH -UWB system [13]. On the other ha...
Báo cáo hóa học: " 3D positioning scheme exploiting nano-scale IR-UWB orthogonal pulses" docx
... orthogonal nano-scale impulse radio ultra-
wideband (IR -UWB) signals and cross array antenna is proposed. The proposed scheme uses nano-scale IR -UWB
signals providing fine time resolution and high-resolution ... ULA
receives the signal from an MS and the phase difference
among antennas is used to estimate the AOA. The
arriving signal at each antenna is sampled into L sam-
ples, where t...
Báo cáo hóa học: " Research Article Interference Mitigation Technique for Coexistence of Pulse-Based UWB and OFDM" doc
... proposed
interference mitigation technique is applied to a DS -UWB
system.
2. SYSTEM MODEL
2.1. Pulse-based UWB
A pulse-based UWB (p -UWB) signal can be expressed:
s
uwb
(t) =
∞
i=0
d
i
s
0
t − iT
r
,(1)
where ... MITIGATION OF
p -UWB INTERFERENCE WITH OFDM
In this section, the effects of interference from UWB on
OFDM signals are evaluated with specific focus on the pulse
repeti...
Báo cáo hóa học: "Research Article The Effect of Cooperation on Localization Systems Using UWB Experimental Data" doc
... Conference on Ultrawideband Systems and
Technologies (UWBST & IWUWBS ’04), pp. 258–262, Kyoto,
Japan, May 2004.
[3] D. Dardari, “Pseudo-random active UWB reflectors for accu-
rate ranging,” IEEE Communications ... 2002.
[10] C C. Chong and S. K. Yong, “A generic statistical-based UWB
channel model for high-rise apartments,” IEEE Transactions on
Antennas and Propagation, vol. 53, no. 8,...
Báo cáo hóa học: " Research Article Design and Performance of Cyclic Delay Diversity in UWB-OFDM Systems" docx
... (analysis)
Figure 5: Outage probability of UWB- OFDM system. Jointly en-
coding across four subcarriers. CDD with two transmit antennas.
6. DELAY TIME SELECTION OF CDD ON
UWB- OFDM SYSTEM
Since the simulation ... transmission
technique for UWB systems becoming ISO standard [3]. This
latter technique will be considered in this paper.
To enhance system performance, multiple antennas
could b...
Báo cáo hóa học: " PhantomNet: Exploring Optimal Multicellular Multiple Antenna Systems" doc
... single transmit antenna at
the base station and a single receive antenna at each user, the
vector broadcast channel with a single antenna at the base
station and multiple receive antennas at each ... the gen-
eral multiple antenna broadcast system, limiting the number
of tr ansmit antennas at the base station to one does lead to a
simple solution. A single transmit antenna at the ba...
Antenna Technology docx
...
(called feed horns) for larger antenna structures such as parabolic antennas, as standard
calibration antennas to measure the gain of other antennas, and as directive antennas for
such devices ...
Chapter 1 - Dipole Antenna
Chapter 2 - Horn Antenna
Chapter 3 - Radio Telescope
Chapter 4 - Parabolic Antenna
Chapter 5 - Antenna (Radio)
Chapter 6 - Television Antenna
Cha...
UWB Antenna TOH ppt
... IEE Microw. Antennas
Propag., vol. 150, no. 6, pp. 429–435, Dec. 2003.
[6] X. Qing, Z. N. Chen, and M. Y. W. Chia, UWB characteristics of disc
cone antenna, ” in Proc. Int. Workshop on Antenna Technol. ... “Wide-band planar monopole
antennas,” IEEE Trans. Antennas Propag., vol. 46, no. 2, pp. 294–295,
Feb. 1998.
[4] Z. N. Chen, “Broadband rolled monopole,” IEEE Trans. Antennas
Propag., vo...
Tài liệu ADC PROFESSIONAL SERVICES Distributed Antenna Systems Maintenance doc
... SERVICES
Distributed Antenna Systems Maintenance
Reduce costs
Improve network performance
Improve quality and consistency
Ensure continuous revenue generation
DISTRIBUTED ANTENNA SYSTEMS MAINTENANCE
As ... technician(s)
• Performance of preventive maintenance
tasks and completion of required
documentation
DISTRIBUTED ANTENNA SYSTEMS MAINTENANCE
Web Site: www.adc.com
From North Amer...