Báo cáo hóa học: " Research Article An Energy-Efficient Adaptive Modulation Suitable for Wireless Sensor Networks with SER and Throughput Constraints" ppt

... 1–5, Helsinki, Finland, September 2006. [26] IEEE Std 802.15.4-2003, IEEE Standard for Information technology—telecommunications and information exchange between systems—local and metropolitan area networks specific ... two cases: (a) fixed TDMA with fixed modulation 16-QAM for each sensor and (b) variable length TDMA with fixed modulation (M = 16 and 64), which are shown...

Ngày tải lên: 22/06/2014, 19:20

... simulation scenarios and study the performance measurements as a function of sensor nodes number and sensor field size. In other words, we analyzed the performance of AODVjr, LAR, and WSNHA- LBAR in ... Y. Sankarasubramaniam, and E. Cayirci, Wireless sensor networks: a survey,” Computer Networks, vol. 38, no. 4, pp. 393–422, 2002. [2] C. Reinisch, W. Kastner, G. Neugschwandtn...

Ngày tải lên: 21/06/2014, 05:20

... protocols, evaluate network performance, and so forth. The more accuracy and more spontaneous the runtime data are, more exactly and more deeply we under- stand wireless sensor networks. However, the ... HINT is an upstanding testbed solution for the future fine-grained and experimental studies on the resource- constrained wireless sensor networks. HINT supports any soft...

Ngày tải lên: 21/06/2014, 17:20

... 475–488, 2005. [19] W. B. Heinzelman, A. P. Chandrakasan, and H. Balakrishnan, An application-specific protocol architecture for wireless microsensor networks, ” IEEE Transactions on Wireless Com- munications, ... indices Here we show how the performance indices P i mn ,forany node S i , can be computed when the performance indices, p i mn of its observation and the performance in...

Ngày tải lên: 21/06/2014, 23:20

... 0.0003 200 Note: KPCA1 and KPCA2 correspond to KPCA with l 1 -norm and 2-norm Gaussian kernels; SKO-KPCA1 and SKO-KPCA2 correspond to KPCA with l 1 -norm and 2-norm Gaussian kernels after single ... l 1 -norm and 2-norm Gaussian kernels. Gaussian kernels perform better than with l 2 -norm Gaussian kernel because of the different performances on An2 6. Due to the modulability o...

Ngày tải lên: 22/06/2014, 20:20

... cluster with 40 sensors and SO = 1, and p MAC = 0.13 in the cluster with 32 sensors and SO = 0. This means that the best performance is achieved when a good balance between the number of sensors ... “Detection with distributed sensors,” IEEE Transactions on Aerospace and Electronic Sys- tems, vol. 17, no. 4, pp. 501–510, 1981. [5] A. R. Reibman and L. W. Nolte, “Design and p...

Ngày tải lên: 21/06/2014, 11:20

... probability p, in a scenario with N = 8 sensors and binary quantization. Three values for the sensor SNR are considered: (i) −10 dB, (ii) 0 dB, and (iii) 10 dB. Both MMSE and simplified detection algorithms ... This limit (for p = 0.5), denoted as D rand , depends only on N and in Appendix C we derive a simple analytical approximation for it. In order to better understand the...

Ngày tải lên: 21/06/2014, 17:20

... children nodes, for example, in Figure 5(a), Nodes 1, 2, 3, 4, and 5 form a group with Node 1 being the parent and other nodes being children. Similarly, another example is Nodes 3, 6, 7, 8, and 9 form another ... G,whereM i,j = 1 when Nodes i and j are connected, and M i,j = 0 otherwise. Note that an arbitrary node Node k can be synchronized from p i,j if and only if Nodes...

Ngày tải lên: 22/06/2014, 19:20

... Bertsekas and R. Gallager, Data Networks, Prentice Hall, Englewood Cliffs, NJ, USA, 2nd edition, 1992. [6] A. Harrel, “Sharp bounds and simple approximations for the Erlang delay and loss formulas,” Management ... 1988. [7] N. Christin, J. Liebeherr, and T. Abdelzaher, “Enhancing class- based serv ice architectures with adaptive rate allocation and dropping mechanisms,” IEEE/A...

Ngày tải lên: 21/06/2014, 05:20

... target QAM modulation, some of the stand-alone components are com- mon in many other radio standards, enabling designers to create platforms that can support multiple radio standards, and to increase ... allocation algorithm. References [1]W.T.WebbandL.Hanzo,Modern Quadrature Amplitude Modulation: Principles and Applications for Fixed and Wireless Channels, Wiley-IEEE Press, New Y...

Ngày tải lên: 21/06/2014, 07:20