Results 261 to 270 of about 88,055 (289)
Some of the next articles are maybe not open access.
Capacity with Probabilistic Delay Constraint for Rayleigh Channels
IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007In this work, the maximum constant rate that can be supported with a probability epsiv f exceeding certain delay bound D t is evaluated. Following the works in (Wu, 2003), the procedure to derive this capacity with probabilistic delay constraint CD t,epsiv is described.
Beatriz Soret +2 more
openaire +1 more source
Compressive Sensing for the Capacity of a Rayleigh Fading Channel
2011 IEEE International Conference on Communications (ICC), 2011A given objective function, $I(p_X(x))$, is to be maximized over the argument $p_X(x)$, where $p_X(x)$ is a continuous function of $x \in R^1$. Rather than optimizing $I(p_X(x))$ over the domain of functions, where the optimal solution $p_X^*(x)$ is non-zero only at a few but unknown discrete points $x \in \{x_1 , x_2 , \ldots , x_S \} $, is it ...
Jocelyn Aulin, Djordje Jeremic
openaire +1 more source
Secrecy capacity of correlated rayleigh fading channels
2012 18th Asia-Pacific Conference on Communications (APCC), 2012We consider the secure transmission of information over Rayleigh fading wiretap channel when the main and eavesdropper channels are correlated there. Assuming that before transmission the transmitter knows the full channel state information (CSI) of both the main and eavesdropper channels, we analyze the average secrecy capacity with limited signal-to ...
Jinxiao Zhu +3 more
openaire +1 more source
A Novel FRFT Beamformer for Rayleigh Faded Channels
Wireless Personal Communications, 2008A method of optimal beamforming for flat Rayleigh faded channels using the Fractional Fourier Transform (FRFT) is considered in this paper. It has been demonstrated through simulations that optimal beamforming with FRFT allows smaller mean-square errors in restoring signals degraded with linear time-or frequency variant distortions and Additive White ...
Rajesh Khanna, Rajiv Saxena
openaire +1 more source
Subspace Identification Method for Rayleigh Channel Estimation
2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007In this paper, we propose a new pilot-aided channel estimator. Among the existing approaches, some are based on adaptive algorithms, but they are outperformed by methods where the channel is modeled by an AR or an ARMA process. In that case, estimating the model parameters from noisy observations and selecting the model orders are challenging problems.
Julie Grolleau +2 more
openaire +1 more source
Prediction of State Transitions in Rayleigh Fading Channels
IEEE Transactions on Vehicular Technology, 2007This paper presents a channel-sampling scheme that allows robust estimation of channel transitions into and out of the fade state. The sampling scheme is based upon a second-order autoregressive (AR-2) model for the Rayleigh fading channel and a corresponding state-space representation in terms of fade and nonfade states.
Prachee Sharma, Kavitha Chandra
openaire +1 more source
Linear Equalizers for Flat Rayleigh MIMO Channels
Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005., 2006We consider linear detectors for MIMO systems, i.e., multi-antenna systems where linear equalizers are employed to remove spatial interference. We analyze the behavior of linear equalizers through outage probability. The MMSE equalizer was found to behave in unexpected ways.
Ahmadreza Hedayat +2 more
openaire +1 more source
8-PSK trellis codes for a Rayleigh channel
IEEE Transactions on Communications, 1992A suboptimal trellis coding approach based on the concept of combining a good convolutional code and bit interleavers is presented. The aim is to improve the reliability of digital radio communication over a fading channel. It is shown that over a Rayleigh channel and for a fixed code complexity the proposed system is superior to the baseline system ...
openaire +2 more sources
Coding for the Rayleigh fading channel
1996The problem of effective coding for the Rayleigh fading channel is addressed. A signal transmitted over the Rayleigh fading channel experiences quasi-periodic deep fades in the signal amplitude, and random phase shifts. The fades in signal amplitude are the cause of error events and limit the bit error rate of an uncoded system to about 10-4 at a ...
openaire +2 more sources
Conditions for Cooperative Transmission on Rayleigh Fading Channels
2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall), 2014We consider a system of two nodes transmitting to an access point on quasi-static Rayleigh fading channels. We use signal-to-noise ratio (SNR) thresholds to characterize the requirements of each node, in terms of throughput and reliability, and we study their impact on outage probability.
openaire +1 more source