CAROLINE ALENOGHENA | FEDERAL UNIVERSITY OF TECHNOLOGY, MINNA-NIGERIA (original) (raw)

Papers by CAROLINE ALENOGHENA

2006 International Telecommunications Symposium, 2006

Page 1. A New Propagation Model for Cellular Planning José Nilson C. de Oliveira, Marcelo S. Alen... more Page 1. A New Propagation Model for Cellular Planning José Nilson C. de Oliveira, Marcelo S. Alencar , Valdemar C. da Rocha Jr. and Waslon TA Lopes AbstractIn cellular planning, it is important to guarantee the system ...

International Journal of Advances in Applied Sciences

Ozone gas is a greenhouse gas. Accurate measurement of its concentration is dependent on the righ... more Ozone gas is a greenhouse gas. Accurate measurement of its concentration is dependent on the right value of the ozone gas absorption cross-section. In the literature, discrepancies and inconsistencies have been however linked with ozone gas absorption cross-section. In the literature, information on the pressure effect on pressures less than 100 mbar and greater than 100 but less than 1000 mbar is not available for the visible spectrum. Thus, creating an information gap which this manuscript is intended to fill up. This is the problem that has been addressed in this present work. The method of simulation with SpectralCalc is the method adopted for the present work. HITRAN 2012 simulator, available on spectralcalc.com, was used in simulating the ozone gas absorption cross-section to determine the simultaneous effect of optical path length and pressure at two peak wavelengths in the visible spectrum. Simulation outcomes were obtained for an optical path length of 10 cm to 120 cm shows...

Journal of Sensor and Actuator Networks

The emergence of the COVID-19 pandemic has increased research outputs in telemedicine over the la... more The emergence of the COVID-19 pandemic has increased research outputs in telemedicine over the last couple of years. One solution to the COVID-19 pandemic as revealed in literature is to leverage telemedicine for accessing health care remotely. In this survey paper, we review several articles on eHealth and Telemedicine with emphasis on the articles’ focus area, including wireless technologies and architectures in eHealth, communications protocols, Quality of Service, and Experience Standards, among other considerations. In addition, we provide an overview of telemedicine for new readers. This survey reviews several telecommunications technologies currently being proposed along with their standards and challenges. In general, an encompassing survey on the developments in telemedicine technology, standards, and protocols is presented while acquainting researchers with several open issues. Special mention of the state-of-the-art specialist application areas are presented. We conclude ...

International Journal of Environmental Research and Public Health

The ramifications of the COVID-19 pandemic have contributed in part to a recent upsurge in the st... more The ramifications of the COVID-19 pandemic have contributed in part to a recent upsurge in the study and development of eHealth systems. Although it is almost impossible to cover all aspects of eHealth in a single discussion, three critical areas have gained traction. These include the need for acceptable eHealth architectures, the development of mobile health (mHealth) technologies, and the need to address eHealth system security concerns. Existing survey articles lack a synthesis of the most recent advancements in the development of architectures, mHealth solutions, and innovative security measures, which are essential components of effective eHealth systems. Consequently, the present article aims at providing an encompassing survey of these three aspects towards the development of successful and efficient eHealth systems. Firstly, we discuss the most recent innovations in eHealth architectures, such as blockchain-, Internet of Things (IoT)-, and cloud-based architectures, focusin...

The emerging 5G mobile cellular network is envisaged to accommodate the increasing data traffic g... more The emerging 5G mobile cellular network is envisaged to accommodate the increasing data traffic growth from the unprecedented proliferation of smart devices. The developments in the internet of things (IoT) have also led to the emergence of radio access technologies that can only be handled by a network with ultra-reliable low latency. The nonorthogonal multiple access (NOMA) technology is being proposed by 3GPP for 5G network because of its high spectrum efficiency. But interference management remains a major challenge in deploying NOMA techniques. This paper studies the working principles of NOMA techniques, reviews existing NOMA based interference mitigation schemes and proposes multi antenna zero-forcing beamforming vector, two user NOMA clustering algorithm and formulates an optimization problem for power allocation to mitigate inter-cluster and inter user interference in a NOMA based 5G mobile network. KEYWORDS— Non orthogonal multiple access; 5G network; interference mitigati...

Bulletin of Electrical Engineering and Informatics, 2020

Cellular networks are expanding massively due to high data requirements from mobile devices. This... more Cellular networks are expanding massively due to high data requirements from mobile devices. This has motivated base station densification as an essential requirement for the 5G network. The implication is obvious benefits in enhanced system capacity, but also increased challenges in terms of interference. One important interference management technique which has been widely adopted in cellular networks is frequency reuse. In this article, an analysis is presented based on network interference and energy expended by base stations in downlink communication when Soft frequency reuse (SFR) is deployed. A framework is presented that captures the bandwidth overlaps in SFR across base station assignments, computes the interference probabilities arising and derives new performance equations which are verified using simulations. Results show an improvement of over previous SFR implementations that do not consider the interference probabilities. Thus, a more in-depth and accurate modelling o...

TELKOMNIKA (Telecommunication Computing Electronics and Control), 2018

Inconsistencies in the ab sorption cross section of ozone have b een ob served. Hence, for accura... more Inconsistencies in the ab sorption cross section of ozone have b een ob served. Hence, for accurate measurement, we have reported the comb ined effects of varying optical path-length and temperature on the ozone gas ab sorption cross section (OACS) at 334.15nm. Adopting optical ab sorption spectroscopy, results of the (OACS) have b een simulated using spectralcalc simulator with HITRAN 12 has the latest line list. OACS increased b y 52.27% as the temperature increased from 100K to 350K while it was slightly affected b y a 0.007% decrease varying the path-length from 0.75cm-130cm.

2014 IEEE 6th International Conference on Adaptive Science & Technology (ICAST), 2014

The threats to global substance necessitated by effects of global warming call for the embrace of... more The threats to global substance necessitated by effects of global warming call for the embrace of green energy initiatives. The powering of telecommunications equipment is an enormous burden for the operators in Nigeria since it has the smallest per capita electricity consumption in the world. In this paper, the challenges faced by telecommunication service providers in powering their infrastructures are reviewed. The green energy options available for powering our telecommunication infrastructure in Nigeria are analyzed. The paper ends with a frame work on modalities to having safer and efficient power source for communication service delivery. It is anticipated that this paper will bring to light the plight of the public and telecommunication operators in sustaining good quality of service. It will also hasten the need to embrace alternative power supply that is clean and reliable in powering telecommunication base stations for better service delivery.

2020 International Conference in Mathematics, Computer Engineering and Computer Science (ICMCECS), 2020

The necessity and importance of path-loss determination for the purpose of mobile network plannin... more The necessity and importance of path-loss determination for the purpose of mobile network planning and optimization requires that an optimal model should be developed for each specific environment. This will ensure proper planning leading to satisfactory service delivery to each environment at all times. In this study, 3G(2100MHz) mobile propagation in a mountainous area is investigated in order to determine a suitable model for optimizing path-loss prediction in urban, suburban and rural environments. Five models (free space, COST-231, Hata, Egli and ECC-33) were analyzed and compared with field measurement data. Their Mean Absolute Percentage Error (MAPE) and closeness (Root Mean Square Error) to the measured data were determined and compared. ECC-33 over-predicts path-loss for all the environments. Free space prediction was found to be impracticable. The RMSE of each of Egli, Hata and COST-231 were used to modify the models, predict new path-loss values and compare with the measu...

2012 IEEE 4th International Conference on Adaptive Science & Technology (ICAST), 2012

International Journal of Computing and Digital Systems, 2021

Very Large Scale Integration (VLSI) design is a technological advancement in electronics that has... more Very Large Scale Integration (VLSI) design is a technological advancement in electronics that has widely shortened the window from concept to a working prototype in any design. It has also made it possible to design and develop sophisticated and intelligent electronic systems which are easily adaptable to any field of human endeavor with relative ease. In this paper, the VLSI design of a processor system is presented, which implements two transforms i.e. the discrete wavelet packet, and the Hilbert transforms. The combination of these two transforms in a single processor makes it possible to have a system with enhanced subband frequency edge detection in a wideband signal and other specialized areas, which is very useful in such specialized areas of application as spectrum sensing in cognitive radio networks. The results obtained from the simulation and design verification of the processor system showed the effectiveness of the design methodology presented in this paper. As a matter...

Received Dec 31, 2020 Revised Mar 25, 2021 Accepted Jun 14, 2021 Modern shopping centres are undo... more Received Dec 31, 2020 Revised Mar 25, 2021 Accepted Jun 14, 2021 Modern shopping centres are undoubtedly a beehive of intense shopping activities. However, customers are often plagued by salient challenges, which may include fatigue derived from pushing trolleys around the mall and prolonged sorting of bills by the cashier. These shopping challenges could be daunting for the elderly, disabled, pregnant and nursing mothers. In this paper, we addressed these shopping challenges by developing an autonomous shopping cart with the following characteristics; (1) it follows the customer’s movement relieving the need to push a cart, (2) it bills automatically all stock placed in the cart, (3) it prompts the customer to make payment and updates each stock via a local database. Our design adopts a Raspberry Pi, a camera and a few direct current motors programmed to achieve autonomy. We used an open-source cross platform software called XAMPP to create the database and used RFID tags to bill t...

ABSTRACT The increase of the base transceiver station (BTS) in most urban areas can be traced to ... more ABSTRACT The increase of the base transceiver station (BTS) in most urban areas can be traced to the drive by network providers to meet demand for coverage and capacity. In traditional network planning, the final decision of BTS placement is taken by a team of radio planners, this decision is not fool proof against regulatory requirements. In this paper, an intelligent based algorithm for optimal BTS site placement has been proposed. The proposed technique takes into consideration neighbour and regulation considerations objectively while determining cell site. The application will lead to a quantitatively unbiased evaluated decision making process in BTS placement. An experimental data of a 2km by 3km territory was simulated for testing the new algorithm, results obtained show a 100% performance of the neighbour constrained algorithm in BTS placement optimization. Results on the application of GA with neighbourhood constraint indicate that the choices of location can be unbiased and optimization of facility placement for network design can be carried out.

International Journal of Information Engineering and Electronic Business, Nov 8, 2018

The development of wireless technology has facilitated the wide deployment of mobile communicatio... more The development of wireless technology has facilitated the wide deployment of mobile communication systems. The beauty of wireless communication is that all nooks and corners can be reached at a cheaper and faster rate when compared with wireline. Wireless is now dominating the telecommunications market. Initially, the dawn of wireless was seen as the dawn of communications to poor countries and rural areas which were poorly covered by wireline devices due to high cost. Currently, the story has changed. Both the wired and unwired environments are clamoring for wireless connectivity. Considering the hype of R&D in broadband technologies and easy acceptance in the market place, wireline communications may soon die a natural death. However, wireless communications faces a few challenges. One of them is that the radio frequency (RF) carrier signals used in these communication systems degrades as it travels through the air interface due to attenuation and interference. As a result, the range of coverage may not be as planned leading to very weak reception or even dead zones where no communication can be done. This problem has resulted in the development of cellular signal boosters that help in receiving the weak signal, amplifying and then re-transmitting it to reach the uncovered areas. Boosters are now giving hope to the frustrated wireless users such as indoor users and those at the fringes of a cell site. These boosters are diverse in make, range, method of operation, deployment and cost. In this paper, a survey of various signal booster designs, deployment and performance is presented. It is hoped that this will serve as a one-stop shop for researchers and developers in the important field of wireless signal boosters and extenders, who wish to know what is available and existing challenges.

Bulletin of Electrical Engineering and Informatics