نتایج جستجو برای: wideband uwb

تعداد نتایج: 13346  

2007
Hang Liu Hanho Lee Duk Kyung Kim

This paper investigates the performance of the high speed 2-parallel MB-OFDM ultra-wideband (UWB) receiver. Achieving high speed and low complexity become a challenge of UWB system design. In our solution, a highspeed low-complexity 2-parallel MB-OFDM UWB system with fixed point data type will be described and simulated.

Journal: :CoRR 2009
Sana Ullah Murad Ali Asdaque Hussain Kyung Sup Kwak

Recent advances in wideband impulse technology, low power communication along with unlicensed band have enabled ultra wide band (UWB) as a leading technology for future wireless applications. This paper outlines the applications of emerging UWB technology in a private and commercial sector. We further talk about UWB technology for a wireless body area network (WBAN).

2012
Dayan Adionel Guimarães Geraldo Gil Ramundo Gomes

In this tutorial paper, the basic principles of the ultra wideband impulse radio (IR-UWB) technology are covered. Pulse construction and signaling formats are discussed, along with channel models suited to the IR-UWB system design and assessment. Some reception techniques are also presented, with emphasis on the time reversal. The paper also highlights some applications of the IR-UWB technology.

2007
Géza Kolumbán Tamás Krébesz

Fourier analyzer concept that generalize the waveform communications to include chaotic carriers can be used to discuss and optimize detection problems. Using this new description it is possible to develop new detector configurations with improved performance for chaotic communications that may be used in ultra-wideband radio (UWB). Radio communications via channels already occupied by traditio...

2003
Yi-Ling Chao Robert A. Scholtz

The optimal receiver for an ultra-wideband transmitted reference (UWB TR) system in a single user multipath environment is derived, based on knowledge of channel properties. The performances of this optimal receiver and other crosscorrelation receivers are analyzed and compared. The usual crosscorrelation receiver which is often used in UWB TR systems is shown to be suboptimal. In addition, an ...

2007
Géza Kolumbán Tamás Krébesz

Radio communications via channels already occupied by conventional telecommunication systems can be established only by Ultra-WideBand (UWB) radio where the spectrum of transmitted signal covers an ultra-wide frequency band. The power spectral density (psd) of transmitted UWB signal is extremely low and does not cause any noticeable interference in the conventional telecommunication systems. Th...

Journal: :IEEE Journal on Selected Areas in Communications 2002
Matti Hämäläinen Veikko Hovinen Raffaello Tesi Jari H. Iinatti Matti Latva-aho

This paper evaluates the level of interference caused by different ultra-wideband (UWB) signals to other various radio systems, as well as the performance degradation of UWB systems in the presence of narrowband interference and pulsed jamming. The in-band interference caused by a selection of UWB signals is calculated at GSM900, UMTS/wideband code-division multiple-access (WCDMA), and global p...

2003
Michal Pietrzyk

Unique properties of Ultra Wideband (UWB) radio, including very high data rate, low power consumption and low cost, make it a promising technology for fourth generation short-range wireless mobile communications. This paper introduces the reader to the UWB technology, to its main properties, capabilities and applications. Furthermore, the current status of regulatory issues of UWB radio transmi...

2012
M. H. Weng

This paper presents a new ultra-wideband (UWB) bandpass filter (BPF) with sharp roll-off and dual-notched bands. The filter consists of a triangle ring multi-mode resonator (MMR) with the stub-loaded resonator (SLR) for controlling the two transmission zeros at 2.8 / 11 GHz, the embedded open-circuited stub and the asymmetric tight coupled input/output (I/O) lines for introducing the dual notch...

2005
Matti Hämäläinen Jari Iinatti

This paper discusses ultra wideband (UWB) system bit error rate (BER) performance in additive white Gaussian noise (AWGN) channel in the presence of partial band interference. In most of the cases in UWB context, even narrowband interference approaches are reasonable. The study has focused on direct sequence (DS) based UWB system that utilizes binary pulse amplitude modulation (BPAM) as a data ...

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