A subspace-based blind adaptive linear minimum mean square error (MMSE) detector has been proposed for multi-user detection in a direct sequence code-division multiple-access (CDMA) system even when multi-path channels are unknown. In this paper, the applicability of the subspace-based blind adaptive algorithm in multiple access ultra-wideband (UWB) systems is investigated. The problem of blind...

All Rights Reserved © 2016 IJARECE 2335 Abstract— In this paper, an Ultra Wideband antenna for UWB applications and a coplanar Waveguide Feed is presented. The size of the antenna is 25 mm x 25 mm x 1.6 mm 3 and it is prototyped on FR-4 epoxy substrate material which has a dielectric constant of 4.4 at a frequency of 3.03 GHz. The proposed antenna provides a bandwidth of 11.36 GHz from 10.44 GH...

Abstract: In order to adapt to all kinds of spectral mask and utilize the full frequency band and avoid interference to/from the existing wireless systems for ultra wideband (UWB), this paper investigates two pulse designs for ultra wideband-cognitive radio (UWB-CR) by using multiple modified transform domain communication system (M-TDCS). By applying multiple M-TDCS and installing a different ...

─ A simple and compact microstrip-fed ultra wideband (UWB) slot antenna with dual band-notch characteristic for UWB applications has been presented. In order to increase the impedance bandwidth of the square slot antenna, we insert a T-shaped slot in the ground plane that with this structure UWB frequency range can be achieved. Additionally, by using a pair of Lshaped slits at the square radiat...

The Ultra-WideBand (UWB) technique, which offers good energy efficiency, flexible data rate, and high ranging accuracy, has recently been recognized as a revived wireless technology for short distance communication. This paper presents brief overview of two UWB techniques, covering Impulse-Radio (IR-UWB) Frequency-Modulation (FM-UWB) methods. link margin enhancement Very-WideBand (VWB), power c...

Since the first Report and Order by the Federal Communications Commission (FCC) authorized the unlicensed use of ultra wideband (UWB) which must meet the emission masks on February 14, 2002 [1], both industry and academia have paid much attention to R&D of commercial UWB systems. Among UWB system design, the UWB antenna is the key component. Recently, a considerable amount of researches have be...

Ultra-wideband (UWB) technology has become one of the most promising technology for shortrange high speed data communication due to its high data transmission rate and large bandwidth. These systems utilize the frequency band from 3.1GHz to 10.6 GHz, which is al‐ located to the UWB systems by the Federal Communications Commission (FCC) [1]. In this ultra-wide spectrum, several unlicensed short ...

We propose a novel direction-of-arrival estimation technique for ultra-wideband (UWB) electromagnetic waves, which allows for the effect of the antenna mutual coupling. This technique is comprised of a UWB interferometry, a multiple signal classification (MUSIC), and a database. The effectiveness of our scheme is demonstrated through numerical examples.

The narrow bandwidth at low frequency of current available wireless capsule endoscopy do not provide clear images of digestive organs. The Ultra Wideband (UWB) at frequency of 3.1-10.6 GHz is one of the possible frequency band to provide clear images from small intestine and stomach. This paper discusses on an UWB antenna to be placed inside stomach of a human body model.

A novel ultra-wideband (UWB) bandpass filter (BPF) with notched band based on microstrip/slotline ring resonators is presented in this paper. The UWB BPF is fabricated with two microstrip ring resonators on the top copper layer and a slotline ring resonator on the bottom ground layer. Thus, an ultra-wide passband can be achieved owing to the coupling effects and microstrip/slotline transitions ...