Results 21 to 30 of about 23,892 (198)

Entropy Coding Aided Adaptive Subcarrier-Index Modulated OFDM

open access: yesIEEE Access, 2018
We propose entropy coding-aided adaptive subcarrier-index-modulated orthogonal frequency division multiplexing (SIM-OFDM). In conventional SIM-OFDM, the indices of the subcarriers activated are capable of conveying extra information. We propose the novel
Mohammad Ismat Kadir   +3 more
doaj   +1 more source

Kablosuz Ağlarda Yeni Bir Anahtar Dağıtım Yöntemi

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi, 2017
Ağ teknolojilerinin gelişimi ve dijital cihazların artışı multimedya iletimini hızlı ve kolay kılmıştır. Bununla birlikte açık haberleşme kanalları üzerinden yapılan dijital veri iletimi, telif hakkı ihlalleri, dolandırıcılık vb.
Çağatay Ay
doaj   +4 more sources

Orbital Angular Momentum Multiplexed Free-Space Optical Communication Systems Based on Coded Modulation

open access: yesApplied Sciences, 2018
In this paper, we experimentally investigate the turbulence mitigation methods in free-space optical communication systems based on orbital angular momentum (OAM) multiplexing.
Zhen Qu, Ivan B. Djordjevic
doaj   +1 more source

A Novel Framework for Anomaly Detection for Satellite Momentum Wheel Based on Optimized SVM and Huffman-Multi-Scale Entropy

open access: yesEntropy, 2021
The health status of the momentum wheel is vital for a satellite. Recently, research on anomaly detection for satellites has become more and more extensive. Previous research mostly required simulation models for key components.
Yuqing Li   +4 more
doaj   +1 more source

HUBFIRE - A multi-class SVM based JPEG steganalysis using HBCL statistics and FR Index [PDF]

open access: yes, 2010
Blind Steganalysis attempts to detect steganographic data without prior knowledge of either the embedding algorithm or the 'cover' image. This paper proposes new features for JPEG blind steganalysis using a combination of Huffman Bit Code Length (HBCL ...
Bhat, V.H.   +4 more
core   +1 more source

Mesh-based video coding for low bit-rate communications [PDF]

open access: yes, 2006
In this paper, a new method for low bit-rate content-adaptive mesh-based video coding is proposed. Intra-frame coding of this method employs feature map extraction for node distribution at specific threshold levels to achieve higher density placement of ...
Ahmed, KM   +3 more
core   +1 more source

ScBlkCom: An Integrated Compression Algorithm for Single-Cell RNA Sequencing Data [PDF]

open access: yesBIO Web of Conferences
High-throughput sequencing advancements have shifted genomic project bottlenecks from data generation to computational storage and analysis. Single-cell RNA-seq (scRNA-seq) data exhibits unique structural features, including extensive labeled sequence ...
Zhang Yuanxin   +3 more
doaj   +1 more source

Region-Based Hybrid Medical Image Watermarking Scheme for Robust and Secured Transmission in IoMT

open access: yesIEEE Access, 2022
With the growth in Internet and digital technology, Internet of Medical Things (IoMT) and Telemedicine have become buzzwords in healthcare. A large number of medical images and information is shared through a public network in these applications.
Priyanka Singh   +3 more
doaj   +1 more source

Improvements on stochastic vector quantization of images [PDF]

open access: yes, 1993
A novel nonadaptive fixed-rate vector quantizer encoding scheme is presented, and preliminary results are shown. The design of the codebook has been based on a stochastic approach in order to match a previously defined model for the image to be encoded ...
Torres Urgell, Lluís
core   +1 more source

Joint Source-Channel Decoding of Polar Codes for Language-Based Source

open access: yes, 2016
We exploit the redundancy of the language-based source to help polar decoding. By judging the validity of decoded words in the decoded sequence with the help of a dictionary, the polar list decoder constantly detects erroneous paths after every few bits ...
Bandic, Zvonimir   +4 more
core   +1 more source

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