Results 81 to 90 of about 8,203 (170)

Analytical bound for the CCDF of Crest Factor in NC-OFDM Systems

Journal of Communications Software and Systems, 2015
Non-contiguous orthogonal frequency division multiplexing (NC-OFDM) is a promising framework for wireless communication systems due to OFDM characteristics like the spectral bandwidth efficiency, robustness to frequency selective fading channels, etc ...
Mohammed Y. Bendimerad, Fatima Debbat, Fethi T. Bendimerad   +2 more
doaj  

Bias reduction in traceroute sampling: towards a more accurate map of the Internet

, 2007
Traceroute sampling is an important technique in exploring the internet router graph and the autonomous system graph. Although it is one of the primary techniques used in calculating statistics about the internet, it can introduce bias that corrupts ...
A. Clauset, A. Lakhina, A.-L. Barabási, A.S. Klovdahl, D. Achlioptas, D.J. Watts, G. Pólya, J. Leguay, J.-J. Pansiot, J.-L. Guillaume, J.I. Pickands, L. Dall’Asta, M. Faloutsos, M. Penrose, M.J. Salganik, O. Frank, P. Erdős, P. Mahadevan, T. Petermann   +18 more
core   +1 more source

Effective p-value computations using Finite Markov Chain Imbedding (FMCI): application to local score and to pattern statistics

Algorithms for Molecular Biology, 2006
The technique of Finite Markov Chain Imbedding (FMCI) is a classical approach to complex combinatorial problems related to sequences. In order to get efficient algorithms, it is known that such approaches need to be first rewritten using recursive ...
Nuel Grégory
doaj   +1 more source

Multiple Outlier Detection in Samples with Exponential & Pareto Tails: Redeeming the Inward Approach & Detecting Dragon Kings

, 2015
We consider the detection of multiple outliers in Exponential and Pareto samples -- as well as general samples that have approximately Exponential or Pareto tails, thanks to Extreme Value Theory.
Sornette, Didier, Wheatley, Spencer
core  

Reducing the peak-to-average power ration for NOMA waveform with diverse channel using micro genetic algorithm-based partial transmission sequence algorithm

EURASIP Journal on Wireless Communications and Networking
This paper explores the efficiency of peak-to-average power ratio (PAPR) reduction methods in non-orthogonal multiple access (NOMA) systems under Rayleigh and Rician fading channels for various sub-carrier configurations. The μGA-PTS method improves PAPR
Arun Kumar, Mehedi Masud, Ashok Kumar Saini, Aziz Nanthaamornphong   +3 more
doaj   +1 more source

PAPR REDUCTION IN ACO-OFDM FOR VISIBLE LIGHT COMMUNICATION SYSTEM [PDF]

Journal of Engineering Science and Technology, 2018
Visible Light Communication (VLC) is gaining popularity in optical wireless. In conventional OFDM, bi-polar signals having both positive and negative values are considered.
MOHIT SRIVASTAVA, MANOJ KUMAR SHUKLA, NEELAM SRIVASTAVA, ASHOK KUMAR SHANKHWAR   +3 more
doaj  

Energy-Efficiency Analysis of Per-Subcarrier Antenna Selection with Peak-Power Reduction in MIMO-OFDM Wireless Systems

International Journal of Antennas and Propagation, 2014
The use of per-subcarrier antenna subset selection in OFDM wireless systems offers higher system capacity and/or improved link reliability. However, the implementation of the conventional per-subcarrier selection scheme may result in significant ...
Ngoc Phuc Le, Le Chung Tran, Farzad Safaei   +2 more
doaj   +1 more source

Structural Patterns of the Occupy Movement on Facebook

, 2015
In this work we study a peculiar example of social organization on Facebook: the Occupy Movement -- i.e., an international protest movement against social and economic inequality organized online at a city level.
Bessi, Alessandro, Caldarelli, Guido, Del Vicario, Michela, Quattrociocchi, Walter, Scala, Antonio, Zhang, Qian, Zollo, Fabiana   +6 more
core  

PAPR Reduction of Complex Wavelet Packet Modulation (CWPM) System using a Novel Hybrid Technique over Selective Rayleigh Fading Channel

Journal of Engineering and Sustainable Development, 2013
High Peak to Average Power Ratio (PAPR) of transmitted signal is one of the major drawbacks of the complex wavelet packet modulation (CWPM). Utilizing the advantage of concentrating the energy to certain subspaces of the discrete wavelet transform ...
Hikmat N. Abdullah, Majid A. Alwan, Fadhil S. Hasan   +2 more
doaj  

Evaluation of burning detection using modified VGG19 for LULC classification changes [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
This study aims to evaluate the effectiveness of a modified architecture of convolutional neural network (CNN) VGG19 for detecting fires and changes in land use and land cover classification (LULC). Remote sensing data from the Landsat 8 Operational Land
M. F. Roberto, C. S. Faria Junior, J. D. A. D. S. Pereira, J. G. M. D. S. Decanini, M. J. D. S. Freitas   +4 more
doaj   +1 more source