Báo cáo hóa học: " Optical Wireless Sensor Network System Using Corner Cube Retroreflectors" ppt

... 1 shows the parameters of the optical wireless sensor network systems. Figure 4 shows the optical wireless sensor network system using CCRs. 5.1. BER versus transmitted optical power Figure 5 shows ... center Decision H 0 /H 1 Figure 1: Optical wireless sensor network model with CCRs. performance, shorten decision time, and provide other ben- efits [6]. Figure 1 s...

Ngày tải lên: 23/06/2014, 00:20

... transmitted over a com- munication system for supervisory, control, or reference pur- poses. Carrying the local characteristics, another modified signal, y m (ν), is formed using the new basis function ... distinguished from the nonspeech components by using a simple decision scheme. Minimal number of Walsh basis functions to be applied is determined using singular value decomposition...

Ngày tải lên: 22/06/2014, 22:20

... security. New alternative position location systems were recently proposed based on other wireless communication systems, such as cellular networks and wireless LAN. An order issued by the U.S. ... technology to geolocate using DSSS/OFDM based wireless LAN systems [6]. Position loca- tion system based on w ireless LAN is more accurate within the service area of network. However, it...

Ngày tải lên: 22/06/2014, 23:20

... information flow in an inte- grated WBAN system. Wireless Body Area Network of Intelligent Sensors for Patient MonitoringFigure 1 Wireless Body Area Network of Intelligent Sensors for Patient Monitoring Journal ... wireless network node. In addition, physiological sensors can be interfaced with an intelligent sensor board that provides on -sensor processing capabil- ity and co...

Ngày tải lên: 19/06/2014, 10:20

... with networks-on-graph: adaptive network coding for wireless relay networks, in Proc Allerton Conf on Commun, Control and Computing, Urbana Champaign, IL (Sept. 2005) 5. X Bao, J Li, Adaptive network ... diversity in wireless networks. IEEE Trans Inf Theory. 49(10), 2415–2425 (2003). doi:10.1109/TIT.2003.817829 9. Y Chen, S Kishore, J Li, Wireless diversity through network coding....

Ngày tải lên: 20/06/2014, 22:20

... used Internet WiFi network Wimax network Mobile ad hoc network Sensor network Mesh router With gateway Wireless Mesh backbone Mesh router With gateway Figure 1 A wireless mesh network. Parvin and ... in Multihop Wireless Networks, in Proceedings of ACM MobiCom (Sept 2006) 18. Z Zeng, Y Yang, JC Hou, How Physical Carrier Sense Affects System Throughput in IEEE 802.11 Wirel...

Ngày tải lên: 20/06/2014, 22:20

... the k-coverage problem of wireless sensor networks. The goal is to activate minimum number of sensors to ensure that each target in the area is covered by at least k sensors. This problem is NP ... spectrum-access scheduling to improve the spectrum utilization efficiency in hetero- geneous wireless systems. Their simulation results show that spectrum-access scheduling is a feasible and pr...

Ngày tải lên: 21/06/2014, 11:20

... Journal on Wireless Communications and Networking Volume 2010, Article ID 693158, 2 pages doi:10.1155/2010/693158 Editorial Physical-Layer Network Coding for Wireless Cooperative Networks Wen ... interme- diate network nodes to mix, demix, and remix the signals received from multiple links for subsequent transmissions. In addition, network coding fits naturally for the wireless coo...

Ngày tải lên: 21/06/2014, 11:20

... USA, 2006. [11] M. Cardei and J. Wu, “Coverage in wireless sensor networks,” in Handbook of Sensor Networks: Compact Wireless and Wired Sensing Systems, chapter 19, CRC Press, Boca Raton, Fla, ... 2002. [10] A. Ghosh and S. K. Das, “Coverage and connectivity issues in wireless sensor networks,” in Mobile ,Wireless, andSensor Networks: Technology, Applications, and Future Direction...

Ngày tải lên: 21/06/2014, 22:20

... advances in wireless network technologies are grow- ing fast, evidenced by wireless location area networks (WL- ANs), wireless personal area network (WPANs), wireless metropolitan area networks ... wide area networks (WWANs), that is, cellular networks. How- ever, wireless network security is a major obstacle to success- fully deploy these wireless networks. The effort to imp...

Ngày tải lên: 22/06/2014, 22:20