Results 21 to 30 of about 224,992 (205)

Accurate BER Analysis of Asynchronous DS-CDMA Systems in Ricean Channels [PDF]

open access: yes, 2006
The accurate Bit Error Rate (BER) calculation of an asynchronous Ricean-faded DS-CDMA system using random spreading sequences and BPSK modulation is studied in this paper.
Liu, X., Hanzo, L
core   +2 more sources

Analysis of Possibilities of Increasing the Spanned Distance Using EDFA and DRA in DWDM System

open access: yesCommunications, 2017
The aim of this article is a comparison of the EDFA (Erbium Doped Fibre Amplifier) and the DRA (Distributed Raman Amplifier) in a fully optical communication system, working on a specific wavelength. The amplifiers are compared based on their position in
Tomas Ivaniga   +3 more
doaj   +1 more source

On approximation in the Bers spaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1973
Let D D be a Jordan domain in the complex plane with rectifiable boundary
openaire   +1 more source

�ber Diazomethan [PDF]

open access: yesMonatshefte f�r Chemie, 1903
n ...
Wegscheider, Rud, Gehringer, Heinr
openaire   +2 more sources

A Novel PM-OFDM-CDMA System for 5G Wireless Communication with High Capacity and Low Energy Consumption

open access: yesASM Science Journal, 2021
Phase Modulation Orthogonal Frequency Division Multiplexing (PM-OFDM) and Code Division Multiple Access (CDMA) have distinctive advantages. On one hand, PM-OFDM is an attractive technique to combat multipath fading and reduce high PAPR in conventional ...
Jamal Mestoui
doaj   +1 more source

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

open access: yesKirkuk 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 Estimation for HiperLAN/2 [PDF]

open access: yes, 2004
This paper presents a method to estimate the bit error rate (BER) of the wireless channel based on statistical analysis of the soft output of the receiver only. In HiperLAN/2 several modulation schemes can be used. The system should select the most suitable modulation scheme dependent on the quality of the wireless link and the Quality of Service ...
Smit, L.T.   +3 more
openaire   +2 more sources

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

open access: yesJournal 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   +5 more
doaj   +1 more source

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

open access: yesPolish 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   +2 more
doaj   +1 more source

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