Results 231 to 240 of about 128,917 (278)

A Novel FRFT Beamformer for Rayleigh Faded Channels

Wireless Personal Communications, 2008
A 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
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GQR models for multipath Rayleigh fading channels

IEEE Journal on Selected Areas in Communications, 2001
In this paper, reduced complexity statistical models for the representation of wide sense stationary-uncorrelated scattering doubly selective fading channels are developed. Their derivation is based on the evaluation of Fourier integrals by means of Gaussian quadrature rules.
CHIAVACCINI, Eugenio, VITETTA, Giorgio Matteo   +1 more
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Innovations-based MLSE for Rayleigh fading channels

Proceedings of IEEE Pacific Rim Conference on Communications Computers and Signal Processing, 1995
Use of the innovations approach for developing MLSE (maximum likelihood sequence estimation) algorithms for signals transmitted over Rayleigh fading channels is considered. The derived receiver demodulates the signals recursively in a noncoherent fashion and is applicable to any linearly modulated signals and to both frequency-nonselective and ...
Xiaoyong Yu, Subbarayan Pasupathy
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Capacity of Slotted ALOHA in Rayleigh-Fading Channels

IEEE Journal on Selected Areas in Communications, 1987
Fading channels may improve the capacity of slottedALOHA networks. Rayleigh fading and spatially distributed packet transmitters diminish mutual packet interference and thus reduce the average blocking probability of a shared receiver. A transmission model, combining Poisson statistics of the offered data traffic with Rayleigh statistics for the fading
Jens C. Arnbak, W. van Blitterswijk
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Bayesian MLSD for multipath Rayleigh fading channels

2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008
We propose a tree-search based Bayesian approach to blind maximum likelihood sequence detection (MLSD) of convolutionally encoded data transmitted over a multipath Rayleigh fading channel. In deriving the path metric for searching the channel-code tree, the proposed algorithm incorporates a forgetting factor matched to the time variation of the channel
Hossein Roufarshbaf, Jill K. Nelson
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Coding for the Rayleigh fading channel

1996
The 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), 2014
We 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.
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On the performance of the quadratic receiver for Rayleigh fading channels

Proceedings of ICUPC '95 - 4th IEEE International Conference on Universal Personal Communications, 2002
We investigate maximum likelihood sequence estimation (MLSE) of data sequences transmitted over time-varying frequency-selective Rayleigh fading channels. We present the optimal receiver designed to exploit perfect channel state information (CSI) at the beginning of the data sequence and the optimal receiver which does not use this information. For any
CASTOLDI, Piero, R. RAHELI
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Minimum duration outages in Rayleigh fading channels

IEEE Transactions on Communications, 2001
Minimum duration outages have been introduced for lognormal shadow fading where the durations of signal fades were considered in evaluating outages. We develop and analyze such minimum duration outages for channels susceptible to Rayleigh fading. The results show that under typical Doppler frequencies the outages due to Rayleigh fading are more likely ...
Jie Lai, Narayan B. Mandayam
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Multilevel modulation codes for rayleigh fading channels

1991
In this paper, new multilevel modulation codes with good error rate performance on the Rayleigh fading channel are presented. It has been demonstrated that the error performance of a multilevel block code is dominated by the minimum Hamming distance of the component codes when ideal interleaving is applied.
Lin Zhang 0002, Branka Vucetic
openaire   +1 more source