Original Research Paper
ABCD matrix for reflection and refraction of laser beam at tilted concave and convex elliptic paraboloid interfaces and studying laser beam reflection from a tilted concave parabola of revolution

M. Mansour Abadi; Z. Ghassemlooy; D. Smith; W. Pang Ng

Volume 3, Issue 1 , January 2015, Pages 1-11


  Studying Gaussian beam is a method to investigate laser beam propagation and ABCD matrix is a fast and simple method to simulate Gaussian beam propagation in different mediums. Of the ABCD matrices studied so far, reflection and refraction matrices at various surfaces have attracted a lot of researches. ...  Read More

Original Research Paper
FSR Decrement and Coupling Coefficient Increment in Add-Drop Filters

E. Rafiee; F. Emami

Volume 3, Issue 1 , January 2015, Pages 13-16


  In this paper, effects of the structural parameters on the optical characteristics of an add-drop filter, consisting of two straight waveguides and a micro-ring resonator (MRR), have been investigated. In this research, effects of MRR radius, the width of MRR and waveguide and the gap between MRR and ...  Read More

Original Research Paper
Effect of Nonlinear Phase Variation in Optical Millimetre Wave Radio over Fibre Systems

A. Bahrami; W. Pang Ng; Z. Ghassemlooy; T. Kanesan

Volume 3, Issue 1 , January 2015, Pages 17-27


  In this paper, we propose an optical millimetre wave radio-over-fibre (mm-wave RoF) system that uses a dual drive Mach Zehnder modulator (DD-MZM), which is biased at the maximum transmission biasing point, to generate an optical double sideband-suppressed carrier. The input to the DD-MZM are binary phase ...  Read More

Original Research Paper
Biding Strategy in Restructured Environment of Power Market Using Game Theory

J. Shadmani; M. Rashidinejad; A. Abdollahi; I. Taheri

Volume 3, Issue 1 , January 2015, Pages 29-36


  In the restructured environment of electricity market, firstly the generating companies and the customers are looking for maximizing their profit and secondly independent system operator is looking for the stability of the power network and maximizing social welfare. In this paper, a one way auction ...  Read More

Original Research Paper
Analysis and Comparison of PAPR Reduction Techniques in OFDM Systems

M.B. Noori Shirazi; A. Golestani; H. Ahmadian Yazdi; A. Habibi Daronkola

Volume 3, Issue 1 , January 2015, Pages 37-45


  The destructive impact of fading environments and also bandwidth limitations are two main challenges which communication is dealing with them. These challenges can affect on the growth of wireless communication and even cause reliable communications and high data rate to be prevented. Thus, OFDM (Orthogonal ...  Read More

Original Research Paper
TDL-based Wideband Beamforming for Radio Sources Close to the Array Endfire

N. Solgi

Volume 3, Issue 1 , January 2015, Pages 47-53


  Uniform linear array (ULA)-based tapped-delay line (TDL) structure has good performance metrics when the signal sources are located at the middle angles. It offers poor performance when the signal sources are close to the array endfire. In this paper, a new approach is proposed which offers higher performance ...  Read More