Results 31 to 40 of about 325,248 (362)

Information Hiding in Color Image based on LSB and FA [PDF]

Kirkuk Journal of Science, 2017
In this research was to hide information in color images of the type of Joint Photographic Experts Group (JPEG) using hiding technique Least Significant Bit (LSB) with Firefly algorithm.
Dr. Ahmed Sami Nori, Jasim Ibrahim Jasim
doaj   +1 more source

�ber 2-Benzoylfluoren und �ber Reten [PDF]

Monatshefte f�r Chemie, 1904
n ...
openaire   +2 more sources

A Model of OFDM based Maritime VHF Communication System for Data Exchange

Polish Maritime Research, 2018
In the maritime Very High Frequency (VHF) band, there are no systems for transmitting large amounts of data. Therefore, it is necessary to develop new systems that would modernize the Global Maritime Distress and Safety System (GMDSS), significantly ...
Valčić Sanjin, Pogány Tibor, Mrak Zoran   +2 more
doaj   +1 more source

Desain Program Simulasi Unjuk Kerja Kode Walsh Pada Kanal Multipath Fading

Matrix: Jurnal Manajemen Teknologi dan Informatika, 2020
Penelitian ini bertujuan untuk mengetahui pengaruh perubahan jumlah komponen multipath pada unjuk kerja kode Walsh pada kanal multipath fading melalui simulasi dengan menggunakan software Matlab.
Made Arya Putra Kusuma , Nyoman Pramaita , I Made Oka Widyantara , I Gusti Agung Komang Diafari Djuni Harta   +3 more
doaj   +1 more source

Approximate minimum BER power allocation for MIMO-THP system [PDF]

, 2008
This paper proposes a transmit power allocation (TPA) scheme based on multiple-input multiple-output (MIMO) Tomlinson-Harashima precoding (THP) structure, where a TPA matrix is introduced to the conventional MIMO-THP.
Lv, Tiejun, Su, Xinghui, Yang, Shaoshi, Yun, Xiang, Xiang Yun, Shaoshi Yang, Gong, Ping, Ping Gong, Xinghui Su, Tiejun Lv   +9 more
core   +1 more source

Textual geolocation in Hebrew: mapping challenges via natural place description analysis

Journal of Spatial Information Science
Describing where a place is situated is an innate communication skill that relies on spatial cognition, spatial reasoning, and linguistic systems.
Tal Bauman, Tzuf Paz-Argaman, Itai Mondshine, Reut Tsarfaty, Itzhak Omer, Sagi Dalyot   +5 more
doaj   +1 more source

OFDM Signal Research with Varied Subcarriers Number

Transport and Telecommunication, 2016
The orthogonal frequency division multiplexing (OFDM) aggregate signal energy characteristics are studied based on the OFDM signal simulation model. The information reliability of OFDM signal is explored for different sets of OFDM subcarrier numbers and ...
Uryvsky Leonid, Osypchuk Serhii
doaj   +1 more source

FULL-RATE SPACE-TIME BLOCK CODE FOR FOUR TRANSMIT ANTENNAS WITH LINEAR DECODING

Jordanian Journal of Computers and Information Technology, 2020
This paper proposes a new full-rate space-time block code for MIMO systems at four transmit antennas, which aims at minimizing the bit error rate with low-complexity decoding using ZF and MMSE linear detection techniques in Rayleigh fading channels ...
Younes Djemamar, Saida Ibnyaich, Abdelouhab Zeroual   +2 more
doaj   +1 more source

Non-Extendibility of the Bers Isomorphism [PDF]

Proceedings of the American Mathematical Society, 1995
Let G be a torsion free finitely generated Fuchsian group of the first kind of type ( p, n ). The purpose of this paper is to show that the Bers isomorphism of the Bers fiber space
openaire   +1 more source

BER Degradation Detection and Failure Identification in Elastic Optical Networks

Journal of Lightwave Technology, 2017
Optical connections support virtual links in MPLS-over-optical multilayer networks and therefore, errors in the optical layer impact on the quality of the services deployed on such networks.
A. P. Vela, M. Ruiz, F. Fresi, N. Sambo, F. Cugini, G. Meloni, L. Potí, L. Velasco, P. Castoldi   +8 more
semanticscholar   +1 more source