Báo cáo hóa học: " Research Article A Diversity Guarantee and SNR Performance for Unitary Limited Feedback MIMO Systems" potx
Báo cáo hóa học: " Research Article A Diversity Guarantee and SNR Performance for Unitary Limited Feedback MIMO Systems" potx
... Diversity Guarantee and SNR Performance for Unitary Limited Feedback MIMO SystemsBishwarup Mondal and Robert W. Heath Jr.Department of Electrical and Computer Eng ineering, The University of Texas at ... precoding is thetransmit array gain which is also a ected due to precoderquantization. An analytical characterization of the loss in ar-ray gain due to quantization for single-stream beamformingin ... the chan-nel gain is obtained at low values of feedback rate(bits per channel realization) and increasing feedback further leads to insignificant gains. Our characteriza-tion also shows that increasing...
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Báo cáo hóa học: "Research Article A Diversity Guarantee and SNR Performance for Unitary Limited Feedback MIMO Systems" ppt
... 2008, Article ID 594928, 15 pagesdoi:10.1155/2008/594928 Research Article A Diversity Guarantee and SNR Performance for Unitary Limited Feedback MIMO SystemsBishwarup Mondal and Robert W. Heath ... results showthat the approximation in (27) is reasonably accurate even atsmall values of N and provides a practical characterization of performance. 4.5. ObservationsTo better understand the result ... this analysis, we have assumed perfect channel knowl-edge at the receiver and considered an uncorrelated Rayleighfading channel. Performance analysis incorporating channelestimation errors and...
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Báo cáo hóa học: " Research Article A Simplified Constant Modulus Algorithm for Blind Recovery of MIMO QAM and PSK Signals: A Criterion with Convergence Analysis" ppt
... both real and imaginary parts as in CMA and MMA, only one dimension, the real or imaginary part,is considered in SCMA, which makes it very attractive for practical implementation especially when ... 1343–1348,1997.[16] C. B. Papadias and A. J. Paulraj, A constant modulus al-gorithm for multiuser signal separation in presence of delayspread using antenna arrays,” IEEE Signal Processing Letters,vol. ... Communications and Computer Sciences, vol. E83 -A, no. 8, pp. 1498–1512, 2000.[3] A. Cichocki and S I. Amari, Adaptive Blind Signal and ImageProcessing: Learning Algorithms and Applications,JohnWiley&...
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Báo cáo hóa học: "Research Article Two-Step Time of Arrival Estimation for Pulse-Based Ultra-Wideband Systems" potx
... exchange accurate position-related information such as time-of-arrival(TOA) and angle-of-arrival (AOA), in order to obtain accurate location information. One alternative for providing accurateposition-related ... Gaussian approximation for a large number offrames. In other words, for large values of N1, Yiin (7)canbe approximated by a Gaussian random variable.From (34), the Gaussian approximation can ... 2004,http://www.ieee802.org/15/pub/TG 4a. html.[44] M. Abramowitz and I. A. Stegun, Eds., Handbook of Math-ematical Functions with Formulas, Graphs, and MathematicalTab les , Dover, New York, NY, USA, 1972.[45] M. Basseville and...
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Báo cáo hóa học: " Research Article A New Bigram-PLSA Language Model for Speech Recognition" potx
... thebigram-PLSA models an unfair advantage by allowing themto adapt the model parameters to the test data. Nevertheless,we applied it to avoid overfitting.To have a valid comparison, the PLSA and ... in language modeling. Latent topic modelingapproaches such as Latent Semantic Analysis (LSA) [1,2], Probabilistic Latent Semantic Analysis (PLSA) [3], and Latent Dirichlet Allocation (LDA) [4] ... Statistical language modelsare obtained using different approaches depending on theresources and tasks requirements. Extracting n-gram statis-tics is a prevalent approach for statistical language...
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Báo cáo hóa học: " Research Article A Content-Motion-Aware Motion Estimation for Quality-Stationary Video Coding Meng-Chun Lin and Lan-Rong Dung" docx
... subsample subsample subsample subsample subsample subsample subsample (70%)ratio ratio ratio ratio ratio ratio ratio ratioPSNRY ΔPSNRY ΔPSNRY ΔPSNRY ΔPSNRY ΔPSNRY ΔPSNRY ΔPSNRY ΔPSNRYDancer ... subsample approach is feasible and scalable for either hardware or software implementation.The proposed approach is not limited for FSBM, but valid for all kinds of FBMAs. The proposed approach ... Tham, S. Ranganath, M. Ranganath, and A. A. Kassim, A novel unrestricted center-biased diamond search algorithm for block motion estimation,” IEEE Transactions on Circuits and Systems for Video...
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Báo cáo hóa học: " Research Article A Novel Biologically Inspired Attention Mechanism for a Social Robot" ppt
... cooperatewith people as capable partners, that are able to learnfrom natural human instruction and that are intuitive and engaging for people to interact with, but that are also able tosimultaneously ... have implemented two basic behaviorsin this stage: a visual natural landmark detector and a human gesture recognition behavior. These behaviors arethe responsible for provide natural landmarks ... Mechanism for a Social RobotAntonio Jes´us Palomino, Rebeca Marfil, Juan Pedro Bandera, and Antonio BanderaGrupo ISIS, Departamento de Tecnolog´ a Electr´onica, E.T.S.I. Telecomunicaci´on,...
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Báo cáo hóa học: " Research Article A Speed-Adaptive Media Encryption Scheme for Real-Time Recording and Playback System" pot
... Speed-Adaptive Media-DataEncryption (SAME)Statistical char acteristics of compressed audio/video dataare dramatically different from the ones of text data,because the variable-length codes and other ... level. Based on thisstatistical characteristic of media data, we extend the idea ofVEA algorithm to a new method that uses traditional blockcipher to encry pt a part of data (part I), and uses ... be increased by adding theparameter l.5. Performance Analyses5.1. Theoretical Security Analysis Based on Shannon Theory.The following analysis is focused on the basic SAMEalgorithm, and the...
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Báo cáo hóa học: " Research Article A Fast Network Configuration Algorithm for TDMA Wireless Sensor Networks" pot
... slots before issuing a DSC packet. Once again, itTable 1: Relevant simulation parameters.CSMA/CA PHY layer and 2C-WSNParameter Value Parameter ValuemacMinBE 3 Radiodatarate250 kbpsmacMaxBE ... complete a father -and- child association, AAO. Recall that this operationconsists of exchanging four packets: DSC, DLY, ACKS ,and ACKF. Several trials were conducted placing the nodesat a distance ... basically equals thetime it takes to transmit a packet and receive a feedback message from a central station. The feedback message isbinary, that is, it is a collision message C when a collisionwas...
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Báo cáo hóa học: " Research Article A Family of Key Agreement Mechanisms for Mission Critical Communications for Secure Mobile Ad Hoc and Wireless Mesh Internetworking" pdf
... Wireless Systems,Barcelona, Spain, May 2010.[20] I. Askoxylakis, K. Markantonakis, T. Tryfonas, J. May, and A. Traganitis, A face centered cubic key agreement mechanism for mobile ad hoc networks,” ... following: there aretwo parties A, B that share a password P.Bothpartiesuse a suitable symmetric cryptosystem but entity A has also theability to create a random asymmetric key pair, (e A , d A ).During ... provide a broad range of mission critical applications. While offering many advantages, such as flexibilit y,easy of deployment and low cost, MANETs and mesh networks face important security and resilience...
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