s g method a revisit

... the autoregressive integrated moving average (ARIMA) model It has many variants including autoregressive (AR) model, moving average (MA) model, autoregressive moving average (ARMA) model, ARMA ... Fig 2.1) Forecasting techniques can be categorized into classes: 1) forecasting using a wireless sensor network (high spatial proximity); 2) using total sky imagers; 3) using satellite imaging; ... facilities for data manipulation, calculation and graphical display It has distinct advantages over Mathematica and Matlab in terms of statistical computing and graphics More information on the software...

Ngày tải lên: 09/09/2015, 08:14

... contributions of the method are that the transmission signals can maintain constant amplitude, and avoid signal constellation expansion They also have a linear signal detector with very low complexity Simulation ... QO-STBC at rate 1.5 bps/Hz, eight transmit antennas Figure gives the simulation results of rate 3/4 differential partial-diversity QO-STBC with eight transmit antennas at transmission rate 1.5 bps/Hz ... contains all the signals transmitted by antenna i in each trial and the length of those signals at each antenna is equal to L We can derive the average channel power, neglecting the noise, by...

Ngày tải lên: 22/06/2014, 19:20

... Department of Arizona State University first as an Assistant Professor (1998–2004), and currently as an Associate Professor His current research interests are in digital communications, wireless and mobile ... other possible alternatives, we also study several other techniques via some examples The rest of the paper is organized as follows In Section 2, trellis shaping for MIMO-OFDM systems is discussed ... and T-algorithms for the Alamouti scheme with an (8, 1, 4) shaping code in Figure The original Alamouti scheme has a spectral efficiency of b /s/ Hz and the trellis-shaped Alamouti scheme has a spectral...

Ngày tải lên: 22/06/2014, 23:20

... lead to large and statistically significant gains in forecast accuracy Key words: Time-varying parameters, stochastic volatility, VAR, FAVAR, forecasting, Bayesian estimation JEL classification: ... statistic across the 24 forecasting models indicates that allowing for time-varying parameters can lead to gains in forecasting In particular, models that incorporate a gradual change in parameters ... steps Sampling the states St : Given starting values for the VAR parameters and covariances and the transition probabilities, the unobserved state variables S and H are drawn using multi-move ˜ Gibbs...

Ngày tải lên: 06/03/2014, 14:20

... standard deviation parameters individually found that Km11Suc has a strong linear relationship with parameter Vmax11, as illustrated in Figure A similar analysis was unable to find a simple relationship ... ~terejanu/files/tutorialUKF.pdf Accessed August 2011 19 RD Baker, A methodology for sensitivity analysis of models fitted to data using statistical methods IMA J Manag Math 12(1), 23–39 (2001) doi:10.1093/imaman/12.1.23 ... Relationship between parameters Vmax11 and Km11Suc, via Vanted data alignment analysis 0.9 Baker et al EURASIP Journal on Bioinformatics and Systems Biology 2011, 2011:7 http://bsb.eurasipjournals.com/content/2011/1/7...

Ngày tải lên: 20/06/2014, 22:20

Ngày tải lên: 21/06/2014, 08:20

Ngày tải lên: 21/06/2014, 08:20

Ngày tải lên: 21/06/2014, 08:20

Ngày tải lên: 21/06/2014, 08:20

Ngày tải lên: 21/06/2014, 08:20

Ngày tải lên: 21/06/2014, 08:20

... the authors know For a given outage probability, the spatial capacity is the maximal sum transmission rate of all users who can communicate peer-to-peer simultaneously in a fixed area In a landmark ... and the multipath delay spread, as will be shown in Section When multiple antennas are used in each transmitter, the array gain obtained is in fact a space-focusing gain Since the focused signals ... transmission, large multipath delay spread provides high spreading gain but induces high collision probability among users In this section, we will first derive the spreading gain and collision...

Ngày tải lên: 21/06/2014, 11:20

... Peterson, Eds., Advances in Dynamic Equations on Time Scales, Birkh¨ user, Boston, a Mass, USA, 2003 S Hilger, “Analysis on measure chains -a unified approach to continuous and discrete calculus,” ... authors express their gratitude to the anonymous referee for his/her valuable suggestions References R P Agarwal and M Bohner, “Basic calculus on time scales and some of its applications,” Results ... calculus,” Results in Mathematics, vol 18, no 1-2, pp 18–56, 1990 V Lakshmikantham, S Sivasundaram, and B Kaymakcalan, Dynamic Systems on Measure Chains, vol 370 of Mathematics and Its Applications, Kluwer...

Ngày tải lên: 21/06/2014, 20:20

... However, a few pilot symbols are almost always necessary, for estimation of the channel gains Considering all this, therefore, we use in our analysis a generalized frame consisting of an orthogonal ... 16QAM data The average power transmitted in a time interval is kept unity The MISO system of two transmit antennas and a single receive antenna employs Alamouti code The channel gains are assumed ... matrices ANALYTICAL AND SIMULATION RESULTS The analytical and simulation results for a frame consisting of two pilot blocks and three OSTBC blocks are shown in Figures 4–6 All the simulations are...

Ngày tải lên: 22/06/2014, 19:20

... nodes as relays The transmitter has M transmit antennas, the receiver has N receive antennas, and the ith relay has Ri antennas Since the transmit and received signals at different antennas of ... relay according to the received signal at that antenna only This is one possible scheme In general, the signal sent by one antenna of a relay can be designed using received signals at all antennas ... understand λmax , we plot the two functions in Figures and for different R and N Figure shows that the PDF has a peak at a value a bit larger than As R increases, the peak becomes sharper An increase...

Ngày tải lên: 22/06/2014, 19:20

... USA, 2003 [5] A Maaref and S A ssa, “Performance analysis of orthogı onal space-time block codes in spatially correlated MIMO Nakagami fading channels,” IEEE Transactions on Wireless Communications, ... Transactions on Wireless Communications L Musavian and S A ssa ı [20] E Biglieri, J Proakis, and S Shamai, “Fading channels: information-theoretic and communications aspects,” IEEE Transactions on ... fading cases, for example, Rayleigh fading, this capacity is zero as the transmitter has to spend a huge amount of power for channel states in deep fade to achieve a constant rate To alleviate...

Ngày tải lên: 22/06/2014, 19:20

... channel is assumed to be quasistatic and neighboring symbols not have significant changes on channel gains In practice, high-rate data transmission always experiences slow enough quasistatic fading ... proposed DSTS-16QAM CSTS-16QAM DSTS-8PSK CSTS-8PSK DSTS-QPSK CSTS-QPSK DSTS-BPSK CSTS-BPSK Figure 6: BER of DSTS (2 transmit antennas and receive antenna) under Rayleigh fading channel with fm Ts ... channel is slow or fast fading as compared to the data rate Larger value of fm Ts denotes that the channel is changing faster, while smaller value of fm Ts means that the channel is changing...

Ngày tải lên: 22/06/2014, 22:20

... alternatives, Panels B and C show results of using different variable combinations as regressors under otherwise identical conditions In Panel B, both phases of AR use all variables as regressors that appear ... http://www.tbiomed.com/content/3/1/25 Table 1: Estimated parameter values of the S- system model of the pathway in Figure using log(SSE) < -7 as termination criterion a Regressor: A: all variables used as regressors and subsequently ... (X) An uppercase boldface variable (L) represents a matrix of regressor columns and a lower-case boldface variable (y) represents a regressand column in a linear multivariate statistical regression...

Ngày tải lên: 13/08/2014, 23:20

... reliable transmissions in wireless communications Although most researches on STTC assume that perfect channel state information (CSI) is available at the receiver, this assumption is difficult and ... channel fade rates The codes are robust in a statistical sense This means that the robust codes have the best average performance over all the possible channel fade rates The average performance ... denotes a pilot and D a data symbol For rapid fading channels, PSAM is a popular scheme to estimate the channels In PSAM schemes, the training symbols are separated from the information symbols in...

Ngày tải lên: 14/09/2015, 17:55

... message Later, and independently, a similar scheme was suggested by Seshadri and Winters for a single base station in which copies of the same symbol are transmitted through multiple antennas at ... distributed among consecutive antenna elements, whereas in diagonal BLAST, they are circularly rotated among the antenna elements The BLAST signal processing algorithms used at the receiver are CHAPTER ... heart of the technique At the bank of receiving antennas, high-speed signal processors look at the signals from all the receive antennas simultaneously, first extracting the strongest substream...

Ngày tải lên: 16/09/2015, 08:31