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A major drawback of orthogonal frequency division multiplexing (OFDM) is the frequency offset sensitivity. It mainly leads to inter-carrier interference, which can effectively be reduced by employing the pulse shaping filter method. In this manuscript, we present and then optimize the improved double-jump 1 (IDJ1) pulse for digital video broadcasting over cable 2 OFDM systems. Our function is finally...
In this work, the principal aim is establishing networks parameters of wireless sensor. These devices can transmit variables to monitoring the quality of tourist beaches in the Colombian Caribbean. We propose a methodology to choose the network elements and its technologies. We analysis data based on coverage and implement the prototype. We show that the maximum distance between nodes is 33 m at mesh...
Millimeter wave spectrum is the main candidate for body centric wireless applications such as health monitoring, live streaming, and gaming. In this paper, a frequency scanning microstrip antenna array is designed as it provides reconfigurability in the direction of main beam pattern. The designed antenna is an array of 16 elements with the measured impedance bandwidth from 33GHz to 40GHz. The S11...
We developed a field management system with a field server that helps decrease farmers workload. It will be also enable the transfer of knowledge to the next generation of farmers in Japan. In order to reduce the burden of agricultural work, less frequent maintenance of the field server is desired. In this paper, we explain construction method of a local wireless network to cut the power consumption...
We investigated the millimeter-wave absorber integrated planar slot array antenna for a 120-GHz-band close proximity wireless system. Precise alignment and multiple reflection between Tx-Rx antennas become the problem for the application of >100-GHz-close-proximity wireless system. The millimeter-wave absorber integrated planar slot array antenna solves these problems. We adopted the split-ring...
Unmanned aerial vehicles (UAVs) have gained interest in different areas due to their versatility and multiple applications. In this case study, a wireless communication system is analyzed between the UAV and its earth station, for the transmission of thermal images in real time and application in fire control. Considering different types of UAVs capable of transporting a high performance thermal camera,...
Most of the physical-layer authentication methods are based on the pre-knowledge of the channel information and the threshold is fixed before the communication process. In this paper, we propose a physical layer authentication method based on channel information and machine learning with a dynamic threshold in wireless communication environment. In this method, the threshold of the channel differences...
This paper presents a design of a Triband microstrip antenna for 2.4 GHz, 3.5 GHz and 5.7 GHz applied a WBAN (Wireless Body Area Network). The proposed antenna with three substrates types consists of L-shaped slots have been determined based on the frequency bands. For the integration of these techniques three frequency bands consisting of the ISM band 2.4 GHz and 5.7 GHz, and 3.5 GHz band UWB respectively...
This paper presents a door lock system combine with augmented reality technology (AR) and mobile phone remote control system. The system consists four parts: augmented reality application, wireless network module, microcontroller, and electronic door lock. General access control has a keyhole or numeric keypad. Interested people can easily start from here that can open the door. The system only has...
Several compact multiband antennas used for wireless communications will be presented in this lecture. Most of antennas are based on the slot and coplanar structures. The first antenna is a compact broadband printed slot antenna integrating with filters for band notching. The filters including I-shaped and inverse L-shaped narrow slits and L-shaped conductor strip are integrated in the proposed antenna...
With the advancement in energy harvesting in terms of wireless charging techniques, it provides a novel way to solve traditional energy constraint problems in Wireless Sensor Networks (WSNs). Renewable energy such as solar, wind, and geo-thermal energy is converted to energy-storage and further use via harvest-then-transmit strategy. This article introduces a two-layer sleep scheduling system in energy-harvesting...
The Internet of Things (IoT) is becoming important in many areas that include health, entertainment, manufacturing, automotive, home and building automation, industrial, etc. Will it be important for education and more specifically for teaching and learning? If so, what engineering subjects would benefit the most and how effective could the IoT be for teaching and learning? Can IoT technologies and...
In sensor-based activity recognition often huge amounts of data have to be acquired from multiple sensors, which need to be communicated for further processing. When using wireless sensor nodes, energy efficiency is of outstanding importance, since it directly influences the time until the battery needs to be recharged. However, communicating a huge amount of sensor data over wireless interfaces causes...
The application of Wireless Power Transfer (WPT) systems is primarily limited by its energy transfer efficiency. For modern WPT that utilises Strongly Coupled Magnetic Resonances (SCMR), which transfers energy by using the mutual inductance between coils, a higher efficiency can be achieved compared with a conventional air-core transformer module. An SCMR normally works at a desired frequency which...
A method for detecting human motion in complex scenarios based on Channel State Information (CSI) is presented. First, the sensitivity of CSI phase information to human motion is explored, especially to the strenuous motion. Through a large number of experiments, the influence of human motion on CSI phase is found out, and the characteristics of signal changes are extracted. The One-class Support...
Applying network coding and opportunistic routing can significantly improve the throughput performance of wireless multi-hop networks, but a mismatch problem still exists among the upper flow rate, routing and lower transmission resource scheduling. This paper models the throughput optimization as a network utility function maximization in wireless multi-hop networks. By applying Lagrangian dual decomposition...
A novel mobility-aware and energy-efficient coded caching provisioning strategy, Mobee, is proposed for a Cloud Radio Access Network (C-RAN). The placement of the Maximum-Distance Separable (MDS) encoded content at the Base Stations (BSs) is optimized to minimize the total energy consumption of the network comprising the transport and the caching energy consumptions. To account for user mobility,...
Until recent years, industrial control systems relied on wires to transfer the process values and control signals through an industrial plant. The use of wireless is limited to monitoring non-critical process values and using it for process control was uncommon for several reasons: complexity of usage, reliability, power consumption and a general doubt on its advantages. Wireless technology has made...
MODBUS is still one of the most widespread application layer protocols used in industrial communication due to its simple request-response communication session and its readiness to be implemented on top of several lower level communication protocols and various physical media such as RS232/RS485 serial lines and Ethernet TCP/IP. Given the well-known inclination of Modbus to inter-networking, a solution...
This paper presents the development of an energy efficient environmental sensor that sends measurement data to a cloud platform using HTTP (Hypertext Transfer Protocol) requests. The device is based on a programmable system-on-chip (PSoC), and is equipped with a temperature and relative humidity sensor for taking measurements and with a WLAN (wireless local area network) module for sending data to...
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