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In this paper, Two cooperative techniques Amplify and Forward (AF) and Decode and Forward (DF) have been analyzed in multi-hop relay network with full duplex (FDRs) and half duplex relays (HDRs). The performance analysis has been done in terms of secrecy rate for both AF and DF. Numerical results show that AF with FDRs and HDRs improves the secrecy rate over the DF. AF technique outperforms DF by...
Wireless sensor based communication system is an ever growing sector in the industry of communication. Wireless infrastructure is a network that enables correspondence between various devices associated through a infrastructure protocol. In WSN enhancing the life span of network depends on the energy dissipation of the sensor devices. Reducing the energy dissipation of sensor devices will improve...
Unattended Wireless Sensor Networks (UWSNs) are portrayed by long stretches of separated operation and altered or unpredictable interims between sink visits. The nonappearance of a trusted outsider suggests that current WSN trust administration plans are not appropriate to UWSNs. In this approach, we propose a trust administration plan for UWSNs to give effective and vigorous trust information stockpiling...
Healthcare service is one the most important aspects of human life. Traditional healthcare industry has shifted to Information Technology. Modern IT-based healthcare also known as e-Healthcare uses various features of IT and makes it a smart choice for human being. Wireless Body Area Network is one of the most important advancements under e-Healthcare which is based on Wireless Sensor Network. There...
The proposed work deals with the design of an antenna which can be used for most of the wireless applications by reconfiguring and tuning the antenna. The antenna can be used for various combinations of wireless applications such as Wi-Fi, Wi-Max, 3G within a microwave L, S, C and X frequency bands in Electromagnetic Spectrum. Now days, different antennas are preferred/devised for different wireless...
RF front-end defines everything between antenna and IF stage-including filter, amplifier and mixer. Low Noise Amplifier is an important building block of wireless receiver. A single-ended multi-standard CMOS LNA is designed for reconfigurable applications. The design addresses GSM, GPS, WCDMA, UMTS and LTE frequency bands. Based on wideband input matching, the designed LNA covers all band of interest...
Experimental realism of wireless testbeds along with control and repeatability of experiments are some of the prominent fundamental barriers faced by researchers. To overcome these barriers, we are developing a wireless channel emulator that emulates the physical layer and brings about the realism and repeatability in our experiments. Channel emulators are generally used for testing air interface...
Drastic increase in mobile traffic due to smart phone applications require improved performance in terms of data rate and latency. Long Term Evolution (LTE) is a potential component to address the increased mobile traffic, which is designed to be a high data rate with reduced latency to support better Quality-of-Service (QoS). Radio resource management of LTE system performs functions such as link...
The aim of this paper is to implement wireless smart acoustic sensor system with plug and play (PnP) filter and two channel variable decoupling power supply. Smart sensor network based on wireless communication consists of sensing, computing and transmission capability. Features like selectable amplification gain, ADC with high sampling rate i.e. up to 5 Msps make system more accurate and increase...
This paper discusses the effect of introducing slots of different shapes and dimensions in a rectangular patch antenna to improve the bandwidth. The return loss as well as VSWR characteristics of different patch designs are discussed and compared. The reference design that is E-shaped slot patch antenna has operating frequency of 2.48 GHz. The design implementation aims to achieve optimized results...
Optical wireless communication is the potential alternative resource for the congested RF wireless spectrum. Multicarrier communication technique Orthogonal Frequency Division Multiplexing (OFDM) is used in optical wireless transmission systems. To guarantee unipolarity of optical wireless transmission, Flip-OFDM is one of the promising unipolar OFDM technique developed. The key constraint in optical...
A multiband printed Symmetrical Meander Line Antenna(MLA) is used as a radiating plate for Planar Inverted F Antenna (PIFA) contributing it as Symmetrical MLA-PIFA and the ground plane consist of a fractal metamaterial. Meander Line Antenna the size reduces by folding the antenna again and again as a result the efficiency of the antenna increases. Metamaterial have certain properties due to which...
There are significant improvement in technology in the last decade that prove important and beneficial to physically disabled people. The technological advancements have helped in achieving several kinds of systems like smart cane assisting in their daily life activities. Smart phones for the blind people are also available with the help of which different gestures can be recognized. There are screen...
In Data Communication [1], when two or more stations send the data at the same time, there are possibilities that the data packets from different stations may collide. Thus, a protocol is required which may coordinate the data transfer among the computers that share the medium. One such MAC (Medium Access Control) Protocol uses sharing of the transmission channel using three methods namely token passing,...
Li-Fi is an upcoming technology which transmits information through light at a very high speed when compared to present technology. Visible Light Communication(VLC) using LED is a promising technology for next generation in short range high speed data communication. In present shopping system there are many difficulties. We propose a working model for shopping with automatic product detection and...
Use of FPGA's in robotics gives us lots of option to solve the complex operations and real time applications as well. The speed and reconfigure ability of FPGA make that possible. Wireless communication which is having tremendous applications, we are making the use of wireless communication along with FPGA to have industrial security as well as application. The implementations of such a system will...
Now-a-days wireless technologies are being used more and more. The advancement in wireless technologies offers a good opportunity in lots of areas and one of them we find is printer or printing services. This paper proposes a design of an embedded system which directly prints the data through handheld devices from only traditional local printer in spite of using proprietary wireless printers. With...
In Wireless Sensor Network cluster making techniques is proved as energy efficient as compare to normal WSN mechanism. WSN contain small sensor nodes power by battery and do the work of sensing and processing of that senses signal. These tiny sensor node consume lots of energy in sensing and then transmission of signal. By the used of clustering method where each individual node not to direct communicate...
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