Báo cáo hóa học: " Research Article Design and Implementation of an Enhanced 802 11 MAC Architecture for Single-Hop " ppt

... and for the standard 802. 11 protocol. We decide to implement the original IEEE 802. 11 standard at 2 Mbps and not the newer versions at higher speed (for instance 802. 11b and 802. 11g) due to hardware ... and Networking Volume 2007, Article ID 28315, 12 pages doi:10 .115 5/2007/28315 Research Article Design and Implementation of an Enhanced 802. 11 M...

Ngày tải lên: 22/06/2014, 22:20

... nonsaturation conditions, an energy-efficiency comparison between DQ- MAC performance and that of the standard facto 802. 15.4 MAC and the BSN -MAC is portrayed. BSN -MAC has been selected as a reference benchmark for ... Validation and Performance Evaluation The performance of the previously studied DQ -MAC energy-efficiency analysis is validated first with an analytical r...

Ngày tải lên: 21/06/2014, 11:20

... D. Wu, and S. M. Nettles, “Analyzing and preventing MAC- layer denial of serv ice attacks for stock 802. 11 systems,” in Proceedings of the IEEE Workshop on Broadband Wireless Services and Applications ... [2]investigatedthecontrolframes vulnerabilities and adopted enhanced hmac-md5 and hmac- sha1 (EHMAC) algorithms. The format of RTS, CTS, and ACK frames was modified...

Ngày tải lên: 21/06/2014, 05:20

... 2004. [12] J. Andersen and M . T. Hansen, “Energy Bucket: a tool for power profiling and debugging of sensor nodes,” in Proceedings of the 3rd International Conference on Sensor Technologies and Applications ... monitoring, and so forth. 5.3.1. Battery Emulation. For a battery emulation of 3.49 V and 2000 mAh, we could define a full battery with initial voltageof3.49Vandahar...

Ngày tải lên: 21/06/2014, 11:20

... Networking Volume 2010, Article ID 103406, 11 pages doi:10 .115 5/2010/103406 Research Article Design and Implementation of a Testbed for IEEE 802. 15.4 (Zigbee) Performance Measurements Patrick ... Proceedings of the IEEE Radio and Wireless Symposium (RWS ’08), pp. 775–778, Orlando, Fla, USA, January 2008. [13] P. Casey, Design and implementation of a cross-pla...

Ngày tải lên: 21/06/2014, 18:20

... set of complex numbers. Scalars are denoted by x. Column vectors and matrices are denoted by a and A and their elements are denoted by a i and A i,j respectively. Transpose and Hermitian transpose ... debugging and performance analysis is much harder). Secondly, the system is very flexible and parameters like frame structure, pilot placement, and so forth, can be changed rath...

Ngày tải lên: 21/06/2014, 18:20

... point arithmetic, and compared real-time requirements and performance between the fixed point DSP and floating point DSP algorithm implementations. We also introduce an advanced code optimization and an implementation ... sufficient and an absolute maximum performance is required. By hard coding Q format and implementing Choles- ky factorization in hand-optimized assembly, spe...

Ngày tải lên: 22/06/2014, 19:20

... Communication and Vehicular Technology, pp. 13–17, Amsterdam, The Netherlands, October 2001. [5] A. Dammann and S. Kaiser, “Standard conformable antenna diversity techniques for OFDM systems and its ... pages doi:10 .115 5/2008/541478 Research Article Design and Performance of Cyclic Delay Diversity in UWB-OFDM Systems Poramate Tarasak, Khiam-Boon Png, Xiaoming Peng, and F...

Ngày tải lên: 22/06/2014, 06:20

... on Information Security Volume 2007, Article ID 98684, 8 pages doi:10 .115 5/2007/98684 Research Article Design and Analysis of the First BOWS Contest A. Piva 1 and M. Barni 2 1 Department of Electronics ... Steganography, and Watermarking of Multimedia Con- tents IX, E. J. Delp and P. W. Wong, Eds., vol. 6505 of Proceed- ings of SPIE, p. 65051A, San Jose, Calif, USA...

Ngày tải lên: 22/06/2014, 19:20

... of colleagues of the intelligent systems and advanced telecommunication (ISAT) laboratory of the department of computer science of the University of Cape Town for proofreading and reviewing an ... (18)isdefinedby Q ( x ) = 1 √ 2π  ∞ x exp  − 1 2 t 2  dt, (22) and Δ d ı j and Δ r ı j are, respectively, standard deviation of D ıj and R ıj computed adaptively using...

Ngày tải lên: 21/06/2014, 17:20