Results 171 to 180 of about 2,245 (187)
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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
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Decoding of constellations matched to the Rayleigh fading channel
Annales Des Télécommunications, 1998Il a ete recemment montre que l’utilisation de constellations a d dimensions specialisees pour le canal de Rayleigh permettait d’obtenir une diversite d’ordre d sans aucun codage (constellation π) [6–8]. Cependant, le decodage de ces constellations est tres complexe et rend problematique leur utilisation dans des applications haut debit.
Emmanuel Boutillon +2 more
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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
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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
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Multilevel modulation codes for rayleigh fading channels
1991In 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
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Innovations-based MLSE for Rayleigh fading channels
Proceedings of IEEE Pacific Rim Conference on Communications Computers and Signal Processing, 1995Use 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, 1987Fading 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, 2008We 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
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 ...
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Design of polar codes for Rayleigh fading channel
2015 International Symposium on Wireless Communication Systems (ISWCS), 2015A simple method for construction of polar codes for Rayleigh fading channel is presented. The subchannels induced by the polarizing transformation are modeled as multipath fading channels, and their diversity order and noise variance are tracked.
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