Wireless sensor network

“Diversity Techniques in Wireless Communication Systems”, Rutgers University, pp. 1-8, 2005. [12.] P. A. Anghel and M. Kaveh, “Exact Symbol Error Probability of a Cooperative Network in a Rayleigh-Fading Environment”, IEEE trans. wireless commun., vol. 3, no. 5, pp. 1416-1421, Sept. 2004. [13.] P. S. Ahmed, “Turbo Multi-Hop Relaying for Cooperative Communications”, Master Thesis, University of Southampton, September 25, 2009. [14.] S. Haykin and M. Moher, Modern Wireless…

high data rate wireless communication, etc. Instead of radio frequency, VLC uses light, to transfer data. The visible light spectrum is unlicensed and 10,000 times larger than the range of radio frequencies. It can be used as an alternate to the existing radio based wireless communication technologies or in hybrid. Moreover, Integrated VLC resolves issue of load balancing in existing wireless…

frequency spectrum resource is utilized. The efficient use of spectrum is analyzed in terms of coverage area, capacity and reuse distance. OFDMA is a very potential multiple access technique, which will be the key technique for the next generation of wireless communications (4G). In this paper the QoS parameters of OFDMA i.e. spectral efficiency [Erlangs/MHz/m2], system capacity is estimated and also compared with the WCDMA. The other important parameters…

We are aiming to develop a device which is useful for both deaf and dump. We introduce a new device “SILENCE BREAKER”. It consist of a Camera, Micro Projector, Mobile computing device and a bluetooth headset. The synchronized action of all these components helps the dump and deaf for proper communication. The Silence Breaker recognizes the gestures of the dump and generates voice signal corresponding to it. In the case of deaf, the device captures the oral sounds and converts to gestures which…

with friends or families. Also, a type of technology that is used frequently is the Internet. The Internet allows people to connect with people and can gain facts that are essential for people to live. Nurse uses technology such as the Internet and wireless devices to communicate in their field. Also, it makes nurses life’s easier than tracking down a colleague to know what to do if something terrible happens such as someone falling of the bed. Besides making the nurses life easier, the…

authenticate the device using 802.1x. When a user device is connected to the network it will initially communicate on a VLAN will only be allowed to communicate with active directory. Then once the device has been authenticated it will place the device on the appropriate VLAN that it will operate on. Any device that has not been set up in Active Directory will be placed into a null VLAN which will not grant access to the network. To access to the computing device users will use their common…

In today’s world sensors especially optical sensors have many emerging applications beginning from the medical diagnostics to detect the pollution in the environment. Because of these wide range of applications the challenges faced to design, proper functioning and maintenance of an optical sensor requires immense knowledge of optical, material, and environmental properties that could affect sensor performance in all aspects. The wavelength range of the laser, interactions between the signal…

frequency band utilized 2.5GHz for IEEE 802.11b, IEEE 802.11g, or IEEE802.11n, and 5GHz for IEEE 802.11a [20]. Most buildings like a University or an office building have already distributed WiFi hotspots that provide whole building coverage as network access point. Devices which employ Wi-Fi technology include personal computers, video-game consoles, smartphones, digital cameras, tablet computers and digital audio players. That the infrastructure cost and user device cost for WiFi can be very…

The two source nodes, 1 and 2, have messages A and B that need to be transmitted to the two destination/sink nodes, 5 and 6, which need both A and B to be delivered. Each edge in this network can only carry a single value. If nodes could only route/retransmit, then the central link would only be able to carry message A or message B, but not both of them at the same time. Assuming we sent message A through the center, then node 5 would receive message A twice and would never receive message B.…

made much attention in personal area network(PAN).Since the signals pass through human body, the noise or the disturbances that interrups,obstructs,or the limits that effect the performance and interference is less to wireless technologies because the data is largely contained /transmitted with help of human skin. The characteristics of intra body communication are superior to those of other radio-based network technologies. A Personal area network (PAN) is communication system that…