Báo cáo hóa học: " Research Article Survey of Channel and Radio Propagation Models for Wireless MIMO System" docx
Báo cáo hóa học: " Research Article Survey of Channel and Radio Propagation Models for Wireless MIMO System" docx
... Wireless Communications and NetworkingVolume 2007, Article ID 19070, 19 pagesdoi:10.1155/2007/19070 Research Article Survey of Channel and Radio Propagation Models for Wireless MIMO SystemsP. Almers,1E. ... overview of the state -of- the-art radio propagation and channel models for wireless multiple-inputmultiple-output (MIMO) systems. We distinguish between physical models and analytical models and discuss ... understand and mimic the wireless chan-nel and the underlying radio propagation [7]. Hence, themodeling of MIMO radio channels has attracted much at-tention.Initially, the most commonly used MIMO...
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Báo cáo hóa học: " Research Article Combining Wavelet Transform and Hidden Markov Models for ECG Segmentation" pptx
... ProcessingVolume 2007, Article ID 56215, 8 pagesdoi:10.1155/2007/56215 Research Article Combining Wavelet Transform and Hidden Markov Models for ECG SegmentationRodrigo Varej˜ao Andre˜ao1 and J´erˆome ... approach and the physician (the standard deviation for all recordingsis computed as the average of the standard deviations of each recording);(ii) waveform detection: it gives the percentage of wave-forms ... HMMs were trained for QRS complex waveforms; two2-state HMMs for the PQ and ST segments; two 3-stateHMMs for the P wave; two 6-state HMMs for the T wave, and one 3-state HMM for the isoelectric...
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Báo cáo hóa học: " Research Article Effects of Channel Estimation on Multiuser Virtual MIMO-OFDMA Relay-Based Networks" pot
... proposals for pilot-aided channel estimation schemes for MIMO- OFDM trans-formed the problem of estimating overlapping channels inthe estimation of multiple single-input single-output (SISO)OFDM channels. ... Bold capitals and bold face for matrices and vectors,respectively. Ey{x} denotes expectation of x over y and |h| and h account for the absolute value and the square of the2-norm of h, respectively. ... Journal on Wireless Communications and NetworkingVolume 2010, Article ID 764784, 13 pagesdoi:10.1155/2010/764784 Research Article Effects of Channel Estimation on Multiuser Virtual MIMO- OFDMA Relay-Based...
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Báo cáo hóa học: "Research Article Comparison of Channel Estimation Protocols for Coherent AF Relaying Networks in the Presence of Additive Noise and LO Phase Noise Stefan Berger and Armin Wittneben" pptx
... ϕ,forallTable 1: Direction of measurement and required number of channel uses to estimate all first-hop and second-hop channel coefficients.First-hop channel Second-hop channel Requirednumber of channel ... mixing frombaseband to passband and with negative sign when mixingfrom passband to baseband (e.g., [23]). Consequently, theequivalent complex baseband-to-baseband channels from AtoBandfromBtoAarehAB= ... 1Protocols A1 and A2Protocol B1Protocol B2Figure 3: Number of timeslots required to estimate all channel coefficients and perform phase synchronization (for protocols B1 and B2) for the case...
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Báo cáo hóa học: " Research Article Multiplicity of Positive and Nodal Solutions for Nonhomogeneous Elliptic Problems in Unbounded Cylinder Domains" pdf
... critical point of I.Proof. It is obvious that N−∗is closed. Exactly as in the proof of 6, Proposition 3.2, by means of Ekeland’s principle, we derive a PSc2-sequence {un}⊂N−∗ for I. In ... al. 18 for the proof aboutthe decay of positive solution of problem 1.2 which we will use later.Lemma 2.1. Assume a1, f1 and f3 hold. If u ∈ H10Ω is a positive solution of problem ... of problem 1.2,theni u ∈ LqΩ for all q ∈ 2, ∞;ii uy, z → 0 as |z|→0 uniformly for y ∈ ω and u ∈ C1,αΩ for any 0 <α<1;iii for any ∈ 0, 1 μ1, there exist positive...
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báo cáo hóa học:" Research Article Automatic Query Generation and Query Relevance Measurement for Unsupervised Language Model Adaptation of Speech Recognition" doc
... 3A and B and CDEandFFigure 6: An example of hierarchical clustering and selected key-words.Table 3: Examples of selected keywords and clusters.(a) Results for the document “History of characters ... touse a fixed number of candidates because we would haveto control the number of candidates so that a sufficientnumber of candidates was obtained when variable numbers of candidates were used.Next, ... twice, download thousands of Web documents, and train a language model. Therefore, this kind of method isnot suitable for real-time speech transcription, but can beused for off-line transcription...
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Báo cáo hoa học: "Research Article Solutions of 2nth-Order Boundary Value Problem for Difference Equation via Variational Method" pot
... transforms the existence of solutions of the boundary value problem BVPto the existence of critical points for the functional. Some criteria for the existence of at least onesolution and two ... solutions.AcknowledgmentsThis research is partially supported by the NSF of China and NSF of Guangdong Province.References1 R. P. Agarwal and J. Henderson, “Positive solutions and nonlinear eigenvalue problems for ... the forward difference operator; pk∈ R for k ∈1 −n, N and f ∈ C1,N × R, R. A variational functional for BVP 1.1-1.2 is constructedwhich transforms the existence of solutions of the...
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Báo cáo hóa học: " Research Article Simulation of Two-Dimensional Supersonic Flows on Emulated-Digital CNN-UM" docx
... error of the addition and subtraction is simplythe sum of the error of the operands while in the case of multiplication and division, the error of the results alsodepends on the value of the ... means the sum of theinteger and fractional bits of the fixed-point numbers and the width of the mantissa bits in case of the floating-pointnumbers). Due to the large area requirements of the floating-point ... determine the error of the multiplication and division, the value of the operandsare also required which is not known in advance. Therefore,a worst case analysis of the accuracy of the arithmetic...
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Báo cáo hóa học: "Research Article Performance of Coded Systems with Generalized Selection Diversity in Nakagami Fading" docx
... CorporationEURASIP Journal on Wireless Communications and NetworkingVolume 2008, Article ID 670503, 5 pagesdoi:10.1155/2008/670503 Research Article Performance of Coded Systems with GeneralizedSelection ... as turbo codes and product codes. Figures 3–5show the simulation and analytical results for convolution-ally and 8PSK TCM-coded systems over different Nakagamifading channels and with different ... and thecutoff rate of GSC over Rayleigh fading channels wasanalyzed in [2, 3], respectively. In [4], the performance of some special cases of GSC systems over Nakagami fadingchannels was analyzed....
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Báo cáo hóa học: "Research Article Implementation of a Smart Antenna Base Station for Mobile WiMAX Based on OFDMA" pot
... DSPs exist for redundancy and are not used for signal processing. Five DSPs are used for encoding/decoding,beamforming, calibration, and ranging processing. TwoFPGAs perform FFT/IFFT and permutations. ... beamforming scheme addressedthe lack of samples in OFDM-based packet communications.The proposed scheme used time and frequency samples for obtaining the statistical properties of the spatial channel. Finally, ... CorporationEURASIP Journal on Wireless Communications and NetworkingVolume 2009, Article ID 950674, 9 pagesdoi:10.1155/2009/950674 Research Article Implementation of a Smart Antenna Base Station for Mobile WiMAX...
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