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March 2008 Publication Report

ACES Newsletter Paper
Year: 2008      Volume: 23      Number: 1
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Full Newsletter

ACES Newsletter Paper
Year: 2007      Volume: 22      Number: 1
Click here to download PDF     File Size: 1004 KB

March 2008 Full Newsletter

ACES Newsletter Paper
Year: 2008      Volume: 23      Number: 1
Click here to download PDF     File Size: 9015 KB

2007 ACES Confrence Agenda

ACES Newsletter Paper
Year: 2007      Volume: 22      Number: 1
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Shadowing Effect on the Area Spectral Efficiency of a Macro-Femto Heterogeneous Network for Cell-Edge Users

M. C. Uko, S. C. Ekpo, U. Ukommi, R. Kharel
ACES Conference Paper
Year: 2015 - S04 Antenna Applications I
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For rural and urban environment, the combined effect of the multiple impairments like multipath fading and shadowing result in faster reduction in the average signal strength as the distance from the single macrocell transmitter increases.

Acoustic Noise Characterization in Dynamic Systems using an Embedded Measurement Platform

B. Adebisi, S. C. Ekpo, A. Sabagh, A. Wells
ACES Conference Paper
Year: 2014 - Microphone Arrays, Sonar Arrays, Directional Radio Antenna Arrays, Radar Arrays and Other Sensor Arrays
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The modelling of an acoustic beamforming in a dynamic system characterized by time-variant state variables requires a reliable knowledge of the noise conditions of the environment and sensor subsystems.

Gain Enhancement of Acoustic Beamforming Arrays in Complex Dynamic Systems

S. C. Ekpo, B. Adebisi, A. Sabagh, A. Wells
ACES Conference Paper
Year: 2014 - Microphone Arrays, Sonar Arrays, Directional Radio Antenna Arrays, Radar Arrays and Other Sensor Arrays
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Acoustic beamforming in complex dynamic systems is a non-trivial task given the time-variant nature of system variables.

Area Spectral Efficiency of a Macro-Femto Heterogeneous Network for Cell-Edge Users under Shadowing and Fading Effects

M. C. Uko, U. S. Ukommi, S. C. Ekpo, R. Kharel
ACES Journal Paper
Year: 2016      Volume: 31      Number: 9
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The traditional macro-only network is not effective, especially when communication signal is required for users far away from the macrocell base station and located in the cell edge. The signal strength reaching these users is excessively attenuated due to fading and shadowing. The deployment of femtocells around the cell edge of this macrocell helps to reduce the effect of fading and shadowing thereby increasing the overall efficiency of the cellular network. This holds a great promise for adaptive space-based wireless sensor networks, formation-flying satellites and constellations.

Optimisation of the FGT for Electroheat Multiphysics Modelling

S. Ekpo, A. Sunday, E. Ekpo
ACES Conference Paper
Year: 2009 - Challenges in Scattering, Radiation and Multi-domain Modeling
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Multiphysics modelling of coupled systems is indispensable for accurate, reliable and objective characterization of electroheat phenomena. This paper examines the usefulness of the Fourier series and Green’s function methods for deriving the analytical solutions of such models. An optimized Fourier-Green technique (FGT) is vital for accurate model description and analysis. A numerical solution for a EM-heat flow model was realized for an aluminium metal sample using F90 program code and F95 compiler. A homogeneous time-dependent E-field (μV/m) source, consisting of 500 time steps, was used to study the temperature distribution of the metal sample. The results satisfy the set initial and boundary conditions. Besides, the visualisations show that the temperature profile increases towards the centre, averaging 20oC within the bulk of the sample. The optimized FG function promises to revolutionise biomedical applications of EM-based heating, communications devices, RF and microwave heating and industrial processes amongst others.

Parameters Update Integration in EM Analysis of ATL and PTL in the FDM

S. Ekpo, A. Sunday, E. Ekpo
ACES Conference Paper
Year: 2008 - Advanced Transmission Lines Modeling, Macromodeling and Signal Integrity
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The modeling of artificial and planar transmission lines for microwave communications is as critical as the premium set on the bandwidth of the line. Reflectionless networks are ideal for realizing the -3dB signal transmission margin. This paper proposes an electromagnetically (EM)-engineered measurement environment where the parameters of the frequency domain (FD) analysis of the ATL and PTL are adaptively and proactively updated for circuits characterization. This novelty promises immense enhancement in the channel characterization of TEM and dispersive transmission lines.

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