Results 71 to 80 of about 519,749 (200)

Implementation of IEEE 802.15.4a Based UWB Systems for Coexistence with Primary Users

open access: yesInternational Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems, 2016
Peaceful coexistence is a major implementation issuefor both cognitive radios and ultra wideband (UWB) systems.Accordingly, the UWB impulse radio (UWB-IR) based WirelessPersonal Area Network (WPAN) standard IEEE 802.15.4a hassuggested using linear ...
Caglar Findikli   +2 more
doaj   +1 more source

A Hybrid TOA-Fingerprinting Based Localization of Mobile Nodes Using UWB Signaling for Non Line-Of-Sight Conditions

open access: yesSensors, 2012
Recently, Impulse Radio Ultra Wideband (IR-UWB) signaling has become popular for providing precise location accuracy for mobile and wireless sensor node localization in the indoor environment due to its large bandwidth and high time resolution while ...
Md. Humayun Kabir, Ryuji Kohno
doaj   +1 more source

An effective AMS Top-Down Methodology Applied to the Design of a Mixed-SignalUWB System-on-Chip [PDF]

open access: yes, 2007
The design of Ultra Wideband (UWB) mixed-signal SoC for localization applications in wireless personal area networks is currently investigated by several researchers. The complexity of the design claims for effective top-down methodologies.
Crepaldi, Marco   +7 more
core   +1 more source

Optical distribution of OFDM and impulse-radio UWB in FTTH networks [PDF]

open access: yes, 2008
Proposal, experimental demonstration and performance comparison of impulse-radio UWB and OFDM UWB distribution in FTTH networks for high-definition audio/video broadcasting is presented.
Marti, Javier   +13 more
core   +1 more source

IFI and ISI premitigation for block-code-modulated noncoherent UWB impulse radio: A code optimization approach [PDF]

open access: yes, 2012
Codeword matching and signal aggregation (CMSA) is a recently proposed low-complexity noncoherent receiver for block code modulated UWB Impulse Radio (UWB-IR) systems. As the frame/symbol duration is shortened to boost data rate, inter-frame interference
Lv, Tiejun   +4 more
core   +1 more source

Cognospectrum: Spectrum Adaptation and Evolution in Cognitive Ultra-Wideband Radio

open access: yes, 2005
Cognitive Ultra Wideband (UWB) Radio is proposed to exploit the advantages of combining Cognitive Radio with Ultra Wideband technologies. In order to realize Cognitive UWB Radio, multiple pulse waveform adaptations have been investigated for producing ...
K. Yazdandoost   +3 more
core   +1 more source

Initial synchronisation of wideband and UWB direct sequence systems: single- and multiple-antenna aided solutions [PDF]

open access: yes, 2012
This survey guides the reader through the open literature on the principle of initial synchronisation in single-antenna-assisted single- and multi-carrier Code Division Multiple Access (CDMA) as well as Direct Sequence-Ultra WideBand (DS-UWB) systems ...
SeungHwan Won   +3 more
core   +1 more source

Textile UWB antennas for wireless body area networks [PDF]

open access: yes, 2006
A new ultrawideband (UWB) textile antenna designed for UWB wireless body area network (WBAN) applications is presented. Unlike previous textile antennas, these antennas offer a direct integration into clothing due to a very small thickness (0.5 mm) and ...
Klemm, M, Troester, G
core   +1 more source

Stability analysis of the linear time-invariant ultra-wideband channel

open access: yes, 2012
The stability of a general Linear Time-Invariant (LTI) Ultra-WideBand (UWB) Channel Impulse Response (CIR) model is investigated. Since the s-domain or z-domain function of the UWB CIR has an extremely high number of singularities, it cannot be ...
Ahmad, Saeed   +5 more
core   +1 more source

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