Results 21 to 30 of about 911,344 (281)

Information Capacity of Turbulent and Absorptive Underwater Wireless Link with Perfect Laguerre–Gaussian Beam and Pointing Errors

open access: yesJournal of Marine Science and Engineering, 2022
The model of information capacity for underwater wireless optical communication (UWOC) links with pointing errors and the carrier of perfect Laguerre–Gaussian (PLG) beam in absorbed and weakly turbulent seawater is modeled.
Yixin Zhang, Qingze Yan, Lin Yu, Yun Zhu
doaj   +1 more source

On Non-coherent MIMO Channels in the Wideband Regime: Capacity and Reliability [PDF]

open access: yes, 2006
We consider a multiple-input, multiple-output (MIMO) wideband Rayleigh block fading channel where the channel state is unknown to both the transmitter and the receiver and there is only an average power constraint on the input.
Medard, Muriel   +2 more
core   +2 more sources

Improving Streaming Capacity in Multi-Channel P2P VoD Systems via Intra-Channel and Cross-Channel Resource Allocation

open access: yesInternational Journal of Digital Multimedia Broadcasting, 2012
Multi-channel Peer-to-Peer (P2P) Video-on-Demand (VoD) systems can be categorized into independent-channel P2P VoD systems and correlated-channel P2P VoD systems.
Yifeng He, Ling Guan
doaj   +1 more source

Peak-to-average power ratio of good codes for Gaussian channel [PDF]

open access: yes, 2014
Consider a problem of forward error-correction for the additive white Gaussian noise (AWGN) channel. For finite blocklength codes the backoff from the channel capacity is inversely proportional to the square root of the blocklength.
Polyanskiy, Yury, Wu, Yihong
core   +2 more sources

An adaptive q-Lognormal model towards the computation of Average Channel Capacity in slow fading channels [PDF]

open access: yesTelecommunication Systems, 2021
Abstract The characterization of multipath fading and shadowing in wireless communication systems is essential towards the evaluation of various performance measures. It is well known that the statistical characterization of shadowing phenomena is captured by distributions viz., log-normal distribution, gamma distribution and other mixture ...
Tanmay Mukherjee, Dilip Senapati
openaire   +1 more source

Power Allocation and Capacity Analysis for FBMC-OQAM With Superimposed Training

open access: yesIEEE Access, 2019
Superimposed training (ST) is a semiblind channel estimation technique, proposed for orthogonal frequency division multiplexing (OFDM), where training sequences are added to data symbols, avoiding the use of dedicated pilot-subcarriers, and increasing ...
Juan Carlos Estrada-Jimenez   +3 more
doaj   +1 more source

Secrecy Analysis of Directional mmWave UAV-Based Links Under Hovering Fluctuations

open access: yesIEEE Open Journal of the Communications Society, 2023
Recent developments in Unmanned Aerial Vehicles (UAVs) technology have paved the way to their utilization in different fields and applications. Among these applications, UAVs have been widely investigated as a good candidate to serve as mobile base ...
Saud Althunibat   +3 more
doaj   +1 more source

Average channel capacity for Rake receivers

open access: yesElectronics Letters, 2002
The average channel capacity (in the Shannon sense) assigned to each user of a spread spectrum system operating in Rayleigh fading is estimated when optimum operation of a maximal ratio combining Rake receiver is assumed. As is shown, the derived expression fully conforms to the upper bound for the capacity of an ideal non-fading additive white ...
Varzakas, P., Tombras, G.S.
openaire   +2 more sources

Capacity per Unit-Energy of Gaussian Random Many-Access Channels [PDF]

open access: yes, 2020
We consider a Gaussian multiple-access channel with random user activity where the total number of users $\ell_n$ and the average number of active users $k_n$ may be unbounded.
Koch, Tobias, Ravi, Jithin
core   +2 more sources

The Maximum Error Probability Criterion, Random Encoder, and Feedback, in Multiple Input Channels

open access: yesEntropy, 2014
For a multiple input channel, one may define different capacity regions, according to the criterions of error, types of codes, and presence of feedback. In this paper, we aim to draw a complete picture of relations among these different capacity regions.
Ning Cai
doaj   +1 more source

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