Department of Electronic and Telecommunications Engineering (ETE)

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A Network infrastructure for Smart Home
(Department of Electronic and Telecommunication Engineering, IIUC, 19-09) Mohiuddin, Talha Misbah; Riyad, Md. Kamrul Hassan
Abstract There are uncertainties with regard to which network technologies will remain current and adaptable to emerging changes in Smart Home requirements. This research is based on using the existing and available network technologies for Smart Homes. In particular, it used CSMA network and Wifi Network based on IEEE 802.11ac standard. It is expected that a usual home has to upgrade the infrastructural network to fully upgrade into Smart home. So, the focus is to make a building design, based on Bangladesh’s prospective and use CSMA and WiFi network individually in simulation.
Study and Analysis of the Radiation Effects of the Cellphone, BTS Tower and Local Wi-Fi Router on Human Body
(Department of Electronic and Telecommunication Engineering, IIUC, 19-10) Islam, Syed Mainul; Bhattacharjee, Shashwata; Azim, Md. Anwarul
We are regularly in contact with electromagnetic radiation in our daily life. From the radiation produced by mobile phone to that derived from X-ray check-ups, electromagnetic waves appear to be present in current standard of living. In the electromagnetic spectrum, higher frequency has taken great attention for wireless communication with better efficiency. But as much as we like the availability of higher data rate, it comes at a price of increased vulnerability of health hazards. A summary of all non-ionizing health effects has been compiled and an analytical discussion on it due to long term exposure to radiofrequency radiation. In this work an analysis of less hazardous manipulative safe distance between individuals and wireless devices such as- BTS antennas and WIFI routers based on calculating Specific Absorption Rate (SAR) on human body at different distances from BTS and WIFI routers is proposed. Finally, different safety distance for individuals for different WIFI router and different BTS antenna types are proposed in this research.
Design and Simulation of a Wearable Micro strip Patch Antenna for Healthcare Monitoring Applications
(Department of Electronic and Telecommunication Engineering, IIUC, 19-10) Mamun, Sultan Shah; Majumder, Md.Qudrat-E-Alahi
DESIGN AND SIMULATION OF MICRO STRIP PATCH ANTENNAS FOR 5G WIRELESS COMMUNICATION
(Department of Electronic and Telecommunication Engineering, IIUC, 19-10) Soliman, Md Mohiuddin; Hakim, Mohammad Lutful
A High Gain And Wideband 2x2 Array Antenna Design of Microstrip Patch Antenna(MPA) for 5G Application
(International Islamic University Chittagong, 19-10-12) Dini, Abshir Mohamud; Mohamed, Yusuf Mohamed
Abstract Due to their low cost, low profile and ease of manufacturing in the circuit boards, microstrip antennas have become a part and parcel of today's wireless communication world. But poor performance, such as low capacity handling, narrow bandwidth, low gain, etc. In some cases, limit their application. Since high frequency bands will be used in the upcoming wireless communication of the 5th generation (5 G), it will be severely affected by path loss. High gain antenna is required to manage this problem. So the main concern of this research work is to design a high gain 2×2 microstrip patch antenna array. The simulation is performed by using the simulation software Computer Simulation Technology (CST) Microwave Studio which is a commercially available electromagnetic simulator based on finite difference time domain technique. The gain, bandwidth, return loss, VSWR and efficiency of the designed 2×2 array antenna is 23.8 dBi, 600MHz, 74.3dB, 1 and almost 99% respectively.
An Ultra-compact Multiband Antenna for 5G massive MIMO Applications Below 6 GHz
(Department of Electronic and Telecommunication Engineering, 2010) Razin, Kazi Fatin Intesar
In this paper, we have designed a compact antenna for massive MIMO applications. The design has been carried out using various parameters such as left-hand tweak and right-hand tweak. The simulations were carried out with different hands simultaneously. The design and simulation of the proposed MIMO antenna are performed in the CST Studio Suite. The antenna is designed at an operational frequency of 2.6 GHz with a dielectric substrate and a conducting ground plane (W×L=19×38.2 mm2). The material of the substrate is FR-4 (lossy), with a relative permittivity of 4.3, a height of 1.6 mm, and a loss tangent of 0.025. The material of the ground plane is copper (annealed) with a thickness (t) of 0.035 mm, and the ground plane is cut into a smaller one to achieve a broader bandwidth. The optimized dimensions of the antenna are Wp=17.17 mm and Lp=22.13 mm. The width of the feedline (Flow) connected to the patch is 2.42 mm, and the length (Fl) is 14.93 mm.
Performance Evaluation of MIMO in Urban Microcell for Dhaka City at 28 GHz Frequency
(IIUC Central Library, 2018-07) Kamrul, MD. Imtiaz; Haque, Kazi Mazharul
5th generation cellular network is the upcoming revolution in the cellular communication world. It tends to operate in millimeter wave frequency to increase the usage for the next decade. While the researcher focuses on optimising spectral efficiency and increases bandwidth for incredible demand, only the mmWave spectrum have capability that can accommodate the ever-expanding consumption for the wireless network. The 28 GHz frequency band is a serious candidate for mmWave communication with more than 3 GHz of available bandwidth. The line of Sight (LOS) is a direct line between the radio transmitter and receiver and many types of radio transmissions depend on it. Unfortunately, for arbitrary transmission networks, obstacles are commonly caused by non-line-of-sight (NLOS) conditions. This thesis presents a proper number of selection antenna element in 28 GHz frequency in NLOS and LOS environment and their characteristics by analysis of different channel parameter in Urban microcell scenario for Dhaka city. This thesis also discusses the radio propagation mechanisms that impact the performance of the network in the form of time delays, received power, azimuth AoD, Elevation AoD, Azimuth AoA, Elevation AoA, path-lost and RMS delay in LOS and NLOS environments.
Implementation of Dynamic Multipoint VPN over IPsec for Secure Enterprise Network
(IIUC Central Library, 2018-07) Alam, Towhidul; Hamid, Kawsar
The Purpose of this thesis is to promote an improvement of availability and remote access for secure enterprise network infrastructure by using dual hub dual DMVPN(Dynamic Multipoint VPN).using multipoint GRE (mGRE) over IPSec data transmission of enterprise network are reliably secure. DMVPN is a technology that implements different protocols concept such as IPSec encryption, next hop resolution protocol (NHRP), generic routing encapsulation (GRE) and provides dynamic and static IPSec tunnel between spoke to hub, spoke to spoke. In this book, we implement the technique of DMVPN to constructs secure enterprise network of enterprise organization and by using hot standby routing protocol (HSRP) to overcome the failure network. The simulation was done by GNS3 and packet capture by wire shark software. From the result of the test, DMVPN technology with HSRP protocols completely fulfills the real necessity that undertaking utilizes a system for enterprises. It offers a mode which is a fast, advantageous and practical venture and accessible up time network to an endeavor for building a safe and dependable network.
Performance Investigation of Three Precoding Methods for Maximal Energy Efficiency in Next Generation Wireless Communications System
(IIUC Central Library, 2018-09) Kabir, Md. Humayun
Nowadays, Energy Efficiency (EE) has become a buzzword for future wireless communication systems. Consequently, Massive Multiple Input and Multiple Output (MMIMO) technology have attained a great attention for Multi-User Communication scenario. MMIMO systems are crucial to maximizing energy efficiency (EE) and batterysaving technology. Achieving EE without sacrificing the quality of service (QoS) is increasingly important for mobile devices. We first derive the data rate through three linear precoding: Maximum Ratio Transmission (MRT), Zero-Forcing (ZF), and Minimum Mean Square Error (MMSE). Performance EE can be achieved when all available antennas are used and when taking account of the consumption circuit power ignored because of high transmit power.The aim of this work is to demonstrate how to obtain maximum EE while minimizing power consumed, which achieves a high data rate by deriving the optimal number of antennas and number of users in the massive MIMO system. The consumed power of the system includes transmitting power, circuit power consumption, and idle power consumption. The circuit power consumption dominates the system power consumption when the transmitter is equipped with the massive number of antennas. Hence, to analyze this problem, we propose a power consumption model. Maximized EE depends on the optimal number of antennas and determines the number of active users that should be scheduled in each cell. The results show the optimization of Energy with respect to the number of functioning mobile users, number of assigned base stations and launch input power in the system respectively.
Comparative Analysis on Tropospheric Scintillation Prediction Models over Bangladesh Climate
(IIUC Central Library, 2018-09) Hossain, Md. Rabiul; Uddin, Md. Nizam
Satellite communication depends on various environmental elements such as cloud, fog, rain and atmospheric scintillation. In this report, the tropospheric scintillation of Bangladesh climate is predicted by four different prediction models which are ITU-R, Karawasa, Van de Kamp and Otung. This report compare the predicted results and found that the maximum affected scintillation fade depth (SFD) in Barisal and Rajshahi and the SFD is minimum in Mymensingh and Dhaka. The report also indicate that the ITU-R and Van de Kamp models offer better performance.
Design and Performance Evaluation of a Campus Network Based on Different Routing Protocols
(IIUC Central Library, 2018-09) Refat , Chowdhury Mohammad Masum
A Campus Area Network (CAN) can be characterized as a Local Area Network (LAN). Generally, it is a network which connects various entities of an office e.g. various infrastructural entities of a university campus. In this paper, it is designed a new CAN topology and analyzed the performance of CAN by considering Routing Information Protocol (RIP), Enhanced Interior Gateway Routing Protocol (EIGRP), and Open Shortest Path First (OSPF) routing protocols. The simulation results were analyzed with a performance comparison among these three routing protocols. It is found that the proposed design model reduces the cost from bandwidth perspective and also provides values for various network parameters which lead to better Quality of Service (QoS) in the CAN.
Design and Evaluation of 20Gbps Inter Satellite Optical Wireless Communication System for improved distance and performance
(Department of Electronic and Telecommunication Engineering, 2019-09) Faisal, Mohammad; Noman, Kazi Ishtiak Hasan
In this present day world, satellite innovation plays a significant role. It is necessary to be sent data which obtained from the different orbits of satellites. So, it is required to have a link between the satellites to send these data. Hence, Inter satellite Optical Wireless Communication (Is-OWC) approach arises. Is-OWC system is high, small size, bandwidth, and light weight, low power and low cost and is therefore chosen over existing microwave satellite systems for reaching in space in the future. However the system has various limitations such as attenuations due to climate conditions, glimmers which limit its performance and diminishes its accessibility.The system also has trade-offs in the efficient design for higher distance coverage with better performance. In this paper, a 20 Gbs Is-OWC system with improved performance and longer distance is introduced. The proposed system is designed and evaluated using Optisystem Software 16 version. The proposed system provides better performance of Q factor and BER for the distance of 20,000 km. The distance is improved by using optical amplifier in the transmitter.
Design and Evaluation of 20Gbps Inter Satellite Optical Wireless Communication System for improved distance and performance
(Department of Electronic and Telecommunication Engineering, 2019-09) Mohammad Faisal, T151022; Kazi Ishtiak Hasan Noman, T151009
In this present day world, satellite innovation plays a significant role. It is necessary to be sent data which obtained from the different orbits of satellites. So, it is required to have a link between the satellites to send these data. Hence, Inter satellite Optical Wireless Communication (Is-OWC) approach arises. Is-OWC system is high, small size, bandwidth, and light weight, low power and low cost and is therefore chosen over existing microwave satellite systems for reaching in space in the future. However the system has various limitations such as attenuations due to climate conditions, glimmers which limit its performance and diminishes its accessibility.The system also has trade-offs in the efficient design for higher distance coverage with better performance. In this paper, a 20 Gbs Is-OWC system with improved performance and longer distance is introduced. The proposed system is designed and evaluated using Optisystem Software 16 version. The proposed system provides better performance of Q factor and BER for the distance of 20,000 km. The distance is improved by using optical amplifier in the transmitter
Design and Implementation of a Home Automation System Using IoT
(Department of Electronic and Telecommunication Engineering, 2019-10) Ziaul Abedin Tanvir, T153026; Anwarul Ashadozzaman Nur Sohag, T153040
Design and Implementation of a Home Automation System Using IoT Home Automation System gains popularity due to communication technology advancement. Smart home is one of the Internet of Things applications that facilitates the control of home appliances over the Internet using automation system. This paper proposes a low-cost Wi-Fi based automation system for Smart Home in order to monitor and control home appliances remotely using IoT based application. An Arduino Mega microcontroller provided with Wi-Fi module is utilized to build the automation system. In addition, several sensors are used to monitor the temperature, humidity and motion in home. A relay board is exploited to connect the home automation system with home under controlled appliances. The proposed automation system can easily and efficiently control the electrical appliances via Wi-Fi. This project proposes a low cost, secure, universally accessible, auto-configurable, remotely controlled solution. The approach discussed in the paper is original and Home Automation System achieved the mark to control home appliances remotely using the Wi-Fi technology to connect system parts, satisfying user needs and requirements. Wi Fi technology capable solution Home Automation System proved to be controlled remotely, provide home security and it is low cost as compared to the previous systems. The system design and architecture were discussed, and prototype presents the basic level of home appliance control and remote monitoring Home Automation System been implemented. Finally, the proposed system is better from the scalability and flexibility point of view than the commercially available home automation systems. Home Automation System gains popularity due to communication technology advancement.
Investigation on Wind Power Generation for Dhaka Chittagong Highway Based on Vertical Turbine
(Department of Electronic and Telecommunication Engineering, 2019-10) Billa, Md.Bakey; Shawon, Md. Omar Faruk
Wind power or wind energy is the use of air flow through wind turbines to provide the mechanical power to turn electrical generators and traditionally do other work. Wind power is a sustainable and renewable alternative for burning fossil fuels, and has much less effect on the environment. Electrical energy demand has been continuously increasing. Power generation using wind turbines is becoming viable solution as there is a demand for cleaner energy sources. Vertical axis wind turbines (VAWTs) are more efficient than the horizontal axis wind turbines (HAWTs) for low wind speed applications because of their ability to capture wind flowing from any direction. Therefore, VAWT systems are more suitable for residential and urban applications as they are universally adaptable. Major limitation observed in VAWT is high drag and turbulent force produced by the blade. In this thesis we are utilizing the air force that is generated due to vehicle velocity in Dhaka-Chittagong highway. We are using NACA-2424 as airfoil. NACA 2424 airfoil is selected and analyzed within the required range of Reynolds numbers and wind speeds in Q-Blade software. It is found that the power output is 100W at wind speed of 6 m/s. The estimated price per turbine is approximately 30500 takas only.
Investigation on Wind Power Generation for Dhaka Chittagong Highway Based on Ve
(Department of Electronic and Telecommunication Engineering, 2019-10) Bakey Billa, T-151010; Omar Faruk Shawon, T151039
Investigation on Wind Power Generation for Dhaka Chittagong Highway Based on Ve Wind power or wind energy is the use of air flow through wind turbines to provide the mechanical power to turn electrical generators and traditionally do other work. Wind power is a sustainable and renewable alternative for burning fossil fuels, and has much less effect on the environment. Electrical energy demand has been continuously increasing. Power generation using wind turbines is becoming viable solution as there is a demand for cleaner energy sources. Vertical axis wind turbines (VAWTs) are more efficient than the horizontal axis wind turbines (HAWTs) for low wind speed applications because of their ability to capture wind flowing from any direction. Therefore, VAWT systems are more suitable for residential and urban applications as they are universally adaptable. Major limitation observed in VAWT is high drag and turbulent force produced by the blade. In this thesis we are utilizing the air force that is generated due to vehicle velocity in Dhaka-Chittagong highway. We are using NACA-2424 as airfoil. NACA 2424 airfoil is selected and analyzed within the required range of Reynolds numbers and wind speeds in Q-Blade software. It is found that the power output is 100W at wind speed of 6 m/s. The estimated price per turbine is approximately 30500 takas only
Performance Analysis of a Conformal Antenna at 433Mhz for Wireless Capsule Endoscopy.
(Department of Electronic and Telecommunication Engineering, 2020) Ullah, Mohammad Amanat; Shaon, Triratna Barua
Wireless capsule endoscopy is a new technique that permits complete exploration of the small bowel without outside wires. The conformal antenna is an important part of the WCE system. In this thesis work, a compact capsule antenna is proposed operating at the 433-MHz ISM band. The antenna is attached to the outer wall of a small capsule with dimensions of 19.7 mm and 10.2 mm. A colon-equivalent tissue phantom is designed in CST to numerically verify the operation of the capsule antenna. According to the phantom simulations, the capsule antenna has −10 dB impedance matching from 338 to 558MHz and a minimum return loss S11= -35.7db at 339 MHz. The ultrawideband characteristic enables the capsule antenna to tolerate the detuning effects due to electronic modules in the capsule and due to the proximity of various different tissues in gastrointestinal tracts. The maximum gain achieved by this design is 41.39 dBi. While providing ultrawide operational bandwidth and sufficient radiation performance, the small size makes the antenna suitable especially for pediatric patients in addition to adults.
Design and Performance Analysis of an UWB Micro-strip Patch Antenna for Breast Cancer Detection with Jeans Substrate.
(Department of Electronic and Telecommunication Engineering, 2020) Ullah, Kazi Sami; Nath, Sudipta Kumar
In this emerging technology of microwave in medical science, UWB wireless communication enables a very different way to antenna technology compared to narrow band antenna systems. It can also be usable in microwave imaging technology for breast cancer tumor detection. Our research presents the design and performance analysis of an UWB micro strip patch antenna. By using jeans cloth as substrate material the flexibility of the antenna structure has increased. The antenna bandwidth also increased for the dielectric properties of the substrate. 3.5 GHz to 20 GHz of operating frequency range is gained with minimum -35 dB return loss at 5.5GHz and - 45dB at 14.04GHz. The total bandwidth obtained is 18.5 GHz which is comparatively high with an efficiency of around (75-80) % .The UWB and cloth material substrate makes it preferable for using in breast cancer detection equipment.
End to End Structural Prediction and Lane Detection for Autonomous Vehicle
(Department of Electronic and Telecommunication Engineering, 2020) Rashid, Shyed Md. Abu
Automated road lane detection is the part of vision-based driver assistance system of intelligent vehicles. This driver assistance system reduces the road accidents, enhances safety and improves the traffic conditions. In this paper, we present an algorithm for detecting marks of road lane and road boundary with a view to the smart navigation of intelligent vehicles. Initially, the algorithm converts the RGB road scene image into gray image and employs the flood-fill algorithm to label the connected components of that gray image. Afterwards, the largest connected component, which is the road region, is extracted from the labelled image using maximum width and no. of pixels. Eventually, the outside region is subtracted and the marks or road lane and road boundary are extracted from connected components. The numerical results show the effectiveness of the proposed algorithm on both straight and slightly curved road scene images under different day light conditions and the presence of shadows on the roads. Real-time automated road lane detection is an indispensable part of intelligent vehicle safety system. The most significant development for intelligent vehicles is driver assistance system. This driver assistance system holds great promise in increasing safety, convenience and efficiency of driving. The driver assistance system involves camera-assisted system, which takes the real-time images from the surroundings of the vehicle and displays relevant information to the driver. Thus, intelligent vehicles automatically collect the road lane information and vehicle position relative to the lane. Consequently, the system used by the intelligent vehicles provides the means to alert the drivers, which are swerving off the lane without prior use of the blinker. Therefore, intelligent vehicles will clearly enhance traffic safety if they are extensively taken into use
Estimation of Rain Attenuation for Terrestrial Microwave Link in Bhutan
(Department of Electronic and Telecommunication Engineering, 2020-03) Mohammad Alimul Hasan, T141009; Nayem-Ur Rahman Khan, T141045
Rain attenuation is a major microwave transmission inadequacy. The design of a terrestrial microwave connection is therefore a serious task for engineers. As a result, attenuation caused by rain cannot be ignored for any microwave link. This paper contains a twenty two-year annual rainfall estimate of twenty stations in Bhutan. In ten major cities in Bhutan, namely Thimphu, Chhukha, Gasa, Pemagatshel, Lung chen, Sarpang, Jakar, Zhemgang, Sawang and Trashigang rain attenuation is expected using the ITU-R rain attenuation model in land microwave communication. Rain attenuation is found mostly in the city Sarpang and the least in the town of Thimphu. It is also noted that the vertical signal of polarization experiences less rain attenuation than horizontal polarization. Contour Map is designed to present the rain attenuation in visual form to help an engineer to have a quick overlook before designing a satellite link