an adaptive controller design for flexible

Ngày tải lên: 27/06/2014, 18:20

... American Society for Testing and Materials (ASTM), http://www.astm.org/. [17]J.Maurer,T.F ¨ ugen, and W. Wiesbeck, “Narrow-band measurement and analysis of the inter-vehicle transmission channel ... however, will not change and, therefore, the MSE comparison will still hold. Figure 7 shows the BER performance of QPSK for various relative vehicle speeds. As can be seen, the performance improves ... total SNR if all transmitting antennas transmit the same symbol. We set β and ρ j equal to 1/p in (22)sinceweassumeequalaveragetransmit(receive) power for each transmit (receive) antenna. The k j parameters are...

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Ngày tải lên: 22/06/2014, 23:20

... pages doi:10.1155/2008/250895 Research Article Design and Performance Evaluation of an Adaptive Resource Management Framework for Distributed Real-Time and Embedded Systems Nishanth Shankaran, 1 Nilabja Roy, 1 Douglas ... resource management algorithms and middleware platforms and im- prove flexibility. (iii) Design of a framework determines its performance and applicability. The design of key modules and entities ... multisatellite missions [7]; and intelligence, surveillance, and reconnaissance missions [8]. Specifying and enforcing end-to-end QoS is an impor- tant and challenging issue for open systems DRE due...

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Ngày tải lên: 22/06/2014, 19:20

... importance. And for mechanical translation, if we really want fully automatic, high quality translation, I can see no other choice. Received March 1, 1962 29 anything which he would want ... natural language words have more than one meaning, be- tween which any translating mechanism must con- stantly decide. The resolution of a polysemantic ambiguity, by whatever method of translation, ... of meaning, and defining all words in terms of lower level meanings, should allow us to trace meaning up and down at least as reliably as this can be done in any human's understanding....

Ngày tải lên: 23/03/2014, 13:20

... much and constitute an expense that the program office can avoid. CCDRs require the contractor to report data in a standardized format different from the one they use for internal reporting and management ... of the many anecdotes from program manag- ers about how burdensome some statutes and regulations are, and how that burden translates into adverse consequences for program outcomes. RAND approached ... information about RAND is available at www. rand.org. Summary xiii the benefits in the form of performance enhancements through interoperability. Joint programs tend to be more difficult to manage,...

Ngày tải lên: 29/03/2014, 18:20

... (h v =3)after 20 s. It can be seen that the performance of the proposed algorithm is similar to that of the original SBA. Thus, by using an update controller, the noise-level estimation performance is improved. ... was used. For detailed information about polyphase filterbanks, the reader is referred to [9,10] and the refer- ences therein. 4 Simulation setup To compare the performance of the SBA and the pro- posed ... audible difference. In Figure 3, the subband gain g 1,k ( n)inonesubband (k = 1) and the corresponding level estimates A k (n)and B k (n) are shown for an input signal containing only noise (h v =...

Ngày tải lên: 20/06/2014, 22:20

... Mathematical analysis In this section, we perform mathematical analysis for the PA from following viewpoin ts: connection-level QoS performance, queuing performance, and BR efficiency enhancement. 4.1 ... packet-level QoS performance and resource efficiency for uplink transmission. e) Performing adaptive QoS management to increase or decrease the average source rate based on load status and channel conditions, ... Queuing performance analysis In this section, we analyze the queuing performance for the network under the saturated status, in which all the available bandwidths are used up to guarantee all ongoing...

Ngày tải lên: 21/06/2014, 00:20

... modeling for w ireless infrared channels,” IEEE Transactions on Antennas and Propagation, vol. 50, no. 5, pp. 759–765, 2002. [40] J L. Tang, P. C. Jui, and S. C. Wang, “Simulation and design of omni-directional ... Djahani and Kahn [13, 22]haveusedmultibeam (quasidiffusive) transmitters and imaging diversity receivers to improve the link performance for both LOS and non- LOS IR links. The link performance ... from the transmitter without any significant time delay and power variation. Assuming that the detected signal power is constant and uniform (almost no power variation can be measured) in any location...

Ngày tải lên: 21/06/2014, 17:20

... utilized. 4. PERFORMANCE ANALYSIS AND SIMULATION RESULTS In this section, computer simulations are conducted to assess the performance of the proposed method. To make an easy comparison in performance with ... structure and performance charac- teristics,” Journal of the Institute of Navigation, vol. 25, no. 2, pp. 121–146, 1978. [3] A. J. van Dierendonck, P. J. Fenton, and T. J. Ford, “Theory and performance ... Article An Adaptive Multipath Mitigation Filter for GNSS Applications Chung-Liang Chang and Jyh-Ching Juang Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan Correspondence...

Ngày tải lên: 21/06/2014, 22:20

... values for various scenarios is essential. The performance of the proposed approach directly related to Kalman filter performance. Specifically for more than one user case Kalman performance will ... transceiver system model. Channel bandwidth [5 MHz − M = 512 IFFT size] Transmission bandwidth [9 RB −N = 108 DFT size] Transmission bandwidth configuration [25 RB = 25 ×12 subcarriers] Guard band Active ... comparative analysis, the MSE performance of the method proposed is also investigated in Figure 9.In conjunction with BER performances, as can be seen in both Figures 8 and 9, drastic drops in the performance...

Ngày tải lên: 21/06/2014, 22:20

... platform suitable for real-world deployments in terms of both maintenance costs and expected performances. Moreover, no cross com- pilation is required and standard development tools and OSes can ... Article WING/WORLD: An Open Experimental Toolkit for the Design and Deployment of IEEE 802.11-Based Wireless Mesh Networks Testbeds Fabrizio Granelli, 1 Roberto Riggio, 2 Tinku Rasheed, 2 and Daniele Miorandi 2 1 DISI—University ... 802.11 commodity devices) and open software modules. It is based on an “open” philosophy and aims at providing the scientific community with a suitable tool for performance analysis of WMNs that can be easily...

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