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INFORMATION
PULSERS II – Pervasive Ultra-Wideband Low Spectral Energy Radio Systems Phase II
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PuLSERS Phase II, an industry-led initiative of
39 major industrial and academic organisations,
will continue and extend the successful
work carried out in Phase I. The first phase, the
Integrated Project PuLSERS, started in january
2004 within the IST Programme (FP6) of the
6th Eu Framework Programme, and was successfully
completed year end 2005. The suc-
Motivation
The almost exponential increase of data rates experienced
over the last two decades has invoked a wide spectrum of
novel applications in existing Wireless Personal Area Networks.
The ever increasing demand for high speed wireless
indoor communications paved the way for the development
of numerous wireless schemes capable of delivering
peak data rates of up to 480 Mbps over the airway. Very
High Data Rate (VHDR) applications such as high definition
video streaming or multimedia exchange between handheld
devices call for advanced technologies not only able
to boost the data rates well beyond 1 Gbps, but also capable
of improving the coverage and link reliability of future
short range communications.
Multiple-Input Multiple-Output (MIMO) systems have been
widely considered such as viable solution to overcome the
current limits in wireless communication. The application
of Ultra-wideband to indoor environments, with the rich
energy scattering and large angular spreads of the multipath
channel present there, provides an ideal scenario for MIMO.
By including the spatial dimension, multiple antennas can
effectively turn multi-path propagation, considered initially
a drawback in wireless communications, into an advantage
so as to linearly increase the capacity and data rate of the
system, and/or improve the quality of the wireless link.
Challenges
However, the benefits of MIMO often come at the price of a
manifold increase in complexity, and consequently, the total
FORSCHUNGSZENTRUM L3S L3S RESEARCH CENTER
cessor PuLSERS Phase II builds on the results
of the first phase and aims to research ultra-
Wideband (uWB) innovative devices and system
concepts starting with proof of concept
and obtaining fully working experimental prototypes
enabling verification of the objectives
and specific technical approaches.
The main objective of PuLSERS II is to explore the
enormous potential of ultra-Wideband technology
by means of research, concept development
and integrated system definition including verification
platform implementation. The project
members actively contribute to regulation and
standardisation targeting to set preconditions
for harmonised and viable technical framework
enabling the use of uWB in Europe.
area and power consumption of the system. While the application
of MIMO to UWB has received considerable interest
in the academic world in the last few years, the field of real
implementation and verification of MIMO UWB is still in its
early stages. It is therefore our task to explore the major challenges
of the future employment of multiple-antennas to
VHDR UWB systems, propose viable solutions for efficient
MIMO architectures and verify the achievable gains under
real-world constraints.
Although MIMO UWB offers an additional degree of freedom,
namely the bandwidth, MIMO UWB research is still in
its infancy in comparison with the work in narrowband MIMO
systems, implying that many questions are still open:
• Due to the huge bandwidth of 7.5 GHz, UWB antenna
parameters and electrical properties become strongly
dependent on frequency. Further, the inclusion of UWB
antennas into the whole effective UWB Channel Model