A schematic diagram of a RoF radio-optic system with vortex signals is presented, in which the radio frequency determined by difference between wavelengths two lasers. It assumed that generation signal can be performed through fiber-optic periodic structure, obtained using technology similar to manufacture long-period fiber Bragg gratings. The parameters grating are modeled assuming fundamental...

In 5th generation (5G) and Beyond 5G mobile communication systems, it is expected that numerous antennas will be densely deployed to realize ultra-broadband uniform coverage. However, as the number of increases, total power consumption all also increase, which leads a negative impact on environment operating costs telecommunication operators. Thus, necessary simplify an antenna structure suppre...

In this study, we perform an analytical investigation of the electro-optic (EO), Mach-Zehnder modulator (MZM) transmission boundary area with a nonlinear model. We propose model that represents allowable RF input amplitude within MZM area. investigate maximum and confine its harmonics using theory, RoF simulation, characteristic experiments. The in is convenient technique can without optical am...

5G communications require a multi Gb/s data transmission in its small cells. For this purpose millimeter wave (mm-wave) RF signals are the best solutions to be utilized for high speed data transmission. Generation of these high frequency RF signals is challenging in electrical domain therefore photonic generation of these signals is more studied. In this work, a photonic based simple and robust...

The output performance of Sub Carrier Multiplexing (SCM) based Radio over Fiber (RoF) system has been evaluated for different modulation techniques ie. Direct and External modulation based on Mach Zehender Modulator (MZM) and Optical Phase Modulator (OPM). Simulation has been carried out using different amplification techniques to understand and compare the performance of the system under the i...

With broader available bandwidth, W-band wireless transmission has attracted a lot of interests for future Giga-bit communication. In this article, we experimentally demonstrate W-band radio-over-fiber (RoF) system employing single-sideband single-carrier (SSB-SC) modulation with lower peak-to-average-power ratio (PAPR) than orthogonal frequency division multiplex (OFDM). To overcome the inter-...

1 The concept of Pattern Mining has obtained significant focus in Telecommunications Network Management System (NMS). A big volume of literature has been dedicated to this field and valuable progress was also observed. Both sequential and structured pattern mining techniques were observed to be considered in NMS. In particular NMS logs (Performance and Alarm) pose several interesting issues for...