Results 171 to 180 of about 1,979 (208)

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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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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Construction of Polar Codes in Rayleigh Fading Channel

IEEE Communications Letters, 2019
In this letter, we investigate the effective construction method of the polar codes in the Rayleigh fading channel (RFC) based on the Gaussian approximation (GA) algorithm. For the RFC, two algorithms are proposed to find the equivalent binary input AWGN channel (BIAWGNC).
Dekun Zhou, Kai Niu 0001, Chao Dong 0002
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Co-channel interference reduction in Rayleigh fading channels

Digital Signal Processing, 2006
Abstract Interference can be a significant problem in loosely organized networks such as ad-hoc radio networks. One technique for dealing with interference is to attempt joint detection of all signals arriving at a node. Iterative algorithms based on the turbo-principle yield significant performance improvements when applied to this problem.
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Multiuser scheduling over rayleigh fading channels

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004
Forthcoming wideband wireless systems are supposed to support services with loose delay requirements, which allows for scheduling of data. In this work we investigate fast transmission scheduling for downlink CDMA over a Rayleigh fading channel.
Fredrik Berggren, Riku Jäntti
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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
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Analysis of Cooperative TDMA in Rayleigh Fading Channels

IEEE Transactions on Vehicular Technology, 2013
The time-division-multiple-access-based (TDMA) protocol has been widely utilized as a reliable media access control (MAC) mechanism. By allocating each user a dedicated time slot, a given TDMA user transmits its packets in its exclusively assigned time slots, whereas other users are in idle mode (not transmitting). However, in this paper, a cooperative
Nansai Hu, Yu-Dong Yao, Zhuo Yang
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Probability distributions of SIR in a Rayleigh fading channel

AFRICON 2015, 2015
In fading channel when the interfere signal is a random variable, the resulting signal-to-interference-plus-noise ratio (SINR) or signal-to-interference ratio (SIR) is also random and its distribution has to be known for a correct description of the receiver.
Murad Ridwan, Mohammad Abdo, Eduard A. Jorswieck   +2 more
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Wireless QoS analysis for a Rayleigh fading channel

ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220), 2002
We present an analysis of the relationship between the two link-level QoS (quality of service) parameters (delay and error rate) and the motion speed of a user in a wireless packet network environment. The analysis is based on: (1) a wireless channel simulation using a time-correlated Rayleigh fading model and (2) a physical layer model which complies ...
Kang-Won Lee, Matthew Cheng, Li-Fung Chang   +2 more
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Design of polar codes for Rayleigh fading channel

2015 International Symposium on Wireless Communication Systems (ISWCS), 2015
A 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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