Cellular Interference Alignment: Omni-Directional Antennas and Asymmetric Configurations

Directional versus Omni Directional Antennas for UWB Imaging

Biomedical applications necessitate some restrictions on the type of devices to be used. When Ultra-Wide Band signals are used, the antenna is better to be directional and small in size. This paper presents a modified directional patch antenna design and fabrication which was used in real breast cancer detection experiments using breast phantom. It shows optimistic results.

Relay-Aided MIMO Cellular Networks Using Opposite Directional Interference Alignment

In this paper, we propose an interference alignment (IA) scheme for the multiple-input multipleoutput (MIMO) uplink cellular network with the help of a relay which operates in half-duplex mode. The proposed scheme only requires global channel state information (CSI) knowledge at the relay, with no transmitter beamforming and time extension at the user equipment (UE), which differs from conventi...

SPHERES { OMNI - DIRECTIONAL MULTI - MODEGRAVITATIONAL - WAVE ANTENNAS FOR THE NEXTGENERATIONHo

The sensitivity of resonant-mass gravitational-wave antennas has now reached h 10 ?18 , where h is the dimensionless metric perturbation caused by the wave. In order to observe gravitational wave events such as coalescing neutron star binaries and colliding black holes from as far as the Virgo cluster of galaxies, the detector sensitivity must be improved by three orders of magnitude. With such...

Medium Access Control in Ad Hoc Networks with Omni-directional and Directional Antennas

A New Omni-directional Monopole Antenna for Interference Reduction

A compact Ultra wideband (UWB) antenna with bandnotched characteristic is presented in this paper. It has compact size of 30 mm x 31mm and has ultra wide band operation. A ‘C’ shaped slot was introduced to achieve band notch function from 4.8 GHz to 6 GHz to avoid interference from WLAN. The proposed antenna has ultra wide band frequency range from 3 GHz to 11.5 GHz for return loss below -10 dB...