Directional modulation (DM) is a physical layer security technique based on antenna arrays and so far the polarisation information has not been considered in its designs. To increase the channel capacity, we consider exploiting the polarisation information and send two different signals simultaneously at the same direction, same frequency, but with different polarisations. These two signals can...

Image charge approximations are developed for electric potentials in the PoissonBoltzmann theory in inhomogeneous media consisting of dielectrics or electrolyte solutions such as the layered structure in a membrane or cylindrical ion-channels. The image charges are obtained either by a least square fitting between the potential of unknown images and the exact reaction potential (for the layered...

This paper experimentally studies and models the angulardelay power spectrum density at the mobile station based on the sitespecific measurement in a macrocell in urban area of Tokyo. The authors first show the azimuth power spectral density at the mobile station. It is decomposed into the “classes” which represent specific contributions within limited azimuth range, as well as the residual. Th...

Polarization for Au/Pb(Zr Ti )O /YBa Cu O ferroelectric capacitor has been studied and measured by pulse method. A sequence of pulses with amplitudes varying from 0 to 10 volts in 2 volt steps is applied and a conventional polarization curve is obtained by integrating the charge flow from the polarization switching induced by the voltage ramp. A value of 25?C/cm2 is measured for the satur...

Quantum cryptography is a method for providing two parties who want to communicate securely with a secret key to be used in established protocols of classical cryptography. For more reviews of this topic see [1, 2, 3]. Bennett and Brassard showed that it is possible, at least ideally, to create a secret key, shared by sender and receiver, without both parties sharing any secret beforehand. We r...

Recently, a purely quantum version of polar codes has been proposed in~\cite{DGMS19} based on channel combining and splitting procedure, where randomly chosen two-qubit Clifford unitary acts as operation. Here, we consider the code construction using same procedure in~\cite{DGMS19}, but with fixed unitary. For family Pauli channels, show that polarization happens in multi-levels, synthesized vi...

In this thesis, integrated quantum devices defined using a split gate technique are studied experimentally. These integrated devices provide a novel platform to investigate the property of quantum systems, such as spin polarization, via non-local measurement. Information extracted from these integrated devices leads to a comprehensive understanding of the puzzling phenomenon such as the 0.7 ano...

This work presents measurements of several polarization observables for the reactions −→γ p→ KΛ and −→γ p → K+Σ0. The data were collected in the summer of 2005 at the Thomas Je erson National Accelerator Facility, using a linearly polarized photon beam in the energy range 1.66 GeV < √s < 2.24 GeV. In addition to measuring the photon asymmetry, target asymmetry and hyperon recoil polarization, r...

Dense Wavelength Division Multiplexing (DWDM) system is limited by different impairments like optical attenuation, crosstalk, chromatic dispersion, polarization mode dispersion, Scattering etc. All of these impairments restrict the transmission distance and bandwidth. In the Present Scenario the DWDM system needs significant improvement, where analyzing the crosstalk of an Acousto-Optic Tunable...

This work presents results concerning the MIMO channel capacity of a real wireless channel. For the analysis, we developed a real time UMTS MIMO Sounder platform at Eurecom Institute. The platform, also called EMOS (Eurecom MIMO Openair Sounder), is able to give actual information of the channel environment, offering a possibility to estimate the MIMO channels and the instantaneous capacity. Wi...