Results 151 to 160 of about 1,979 (208)

Digital watermarking for virtual physically unclonable function data concealment and authentication. [PDF]

Sci Rep
Khan R, Saleh H, Mefgouda B, Alhussein O, Muhaidat S.   +4 more
europepmc   +1 more source

Multi-Filter Quantum Neural Networks for Efficient Channel Estimation in RIS-Assisted Systems. [PDF]

Sensors (Basel)
Choi MH, Kim JE, Kim SH, Baek MS, Lee GH, Hwang DD, Song HK.   +6 more
europepmc   +1 more source

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Polar Codes for the Rayleigh Fading Channel

IEEE Communications Letters, 2013
The application of polar codes for the Rayleigh fading channel is considered. We construct polar codes for the block Rayleigh fading channel with known channel side information (CSI) and for the Rayleigh channel with known channel distribution information (CDI).
Angel Bravo-Santos
exaly   +3 more sources

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
exaly   +2 more sources

A case for considering hyper-Rayleigh fading channels

IEEE Transactions on Wireless Communications, 2007
This work is motivated by the problem of characterizing small-scale radio propagation environments for wireless sensor networks. If sensors are statically deployed near the ground or within structures, temporal fading may not exist but the channel may nevertheless experience severe frequency-selective behavior.
Jeff Frolik, J Frolík
exaly   +3 more sources

Constellations matched to the Rayleigh fading channel

IEEE Transactions on Information Theory, 1996
Summary: We introduce a new technique for designing signal sets matched to the Rayleigh fading channel. In particular, we look for \(n\)-dimensional \((n\geq 2)\) lattices whose structure provides \(n\)th-order diversity. Our approach is based on a geometric formulation of the design problem which in turn can be solved by using a number-geometric ...
Xavier Giraud, Jean-Claude Belfiore
openaire   +3 more sources

An OFDM Rayleigh Fading Channel Simulator

IEEE Vehicular Technology Conference, 2006
Several models have been proposed for the simulation of Rayleigh fading channels. However, existing simulators lack to properly consider the correlation between the subchannels of an OFDM system. We use a recently developed cross-correlation function that describes both temporal and frequency correlation in order to generate channel parameters.
Saeed Moradi, Saeed Gazor
openaire   +2 more sources

Measurement Complexity of Rayleigh Fading Channels

IEEE Transactions on Vehicular Technology, 2009
Rayleigh fading is a widely used channel model in wireless communications. The mean channel power is of practical importance in channel access, power control, handoff, modeling, and coverage analysis of wireless systems. A fundamental problem naturally arises: How many measurements are sufficient to estimate these parameters with the prescribed margin ...
Xinjia Chen, Guoxiang Gu, Kemin Zhou
openaire   +1 more source

Adaptive LDPC for Rayleigh fading channel

Proceedings. ISCC 2004. Ninth International Symposium on Computers And Communications (IEEE Cat. No.04TH8769), 2004
Two adaptive coded modulation schemes employing LDPC (low-density parity-check) code are proposed for Rayleigh fading channels. Scheme 1: we fix the code rate (rate=1/2), and only change the modulation methods according to the channel state, that is, during poor channel conditions, QPSK modulation is employed, as channel conditions improve, more ...
Yuling Zhang, Dongfeng Yuan, Haigang Zhang   +2 more
openaire   +2 more sources