scholarly journals NC-OFDM-SPM: A Two-Dimensional Non-Coherent Modulation Scheme for Achieving the Coherent Performance of OFDM along with Sending an Additional Data-stream

2021 ◽  
Author(s):  
Mohamedou Abewa ◽  
Jehad M. Hamamreh
Keyword(s):  
Data Stream ◽  
Additional Data ◽  
Modulation Scheme ◽  
Two Dimensional ◽  
Coherent Modulation

scholarly journals An Improved M-ary Modulation Scheme Based on Chaotic Dynamics

2019 ◽  
Vol 4 (2019) ◽  
pp. 13-19
Author(s):  
Hikmat N. Abdullah ◽  
Asaad H. Sahar ◽  
Thamir R. Saeed
Keyword(s):  
Chaotic Dynamics ◽  
Modulation Scheme ◽  
System Complexity ◽  
Chaotic Sequences ◽  
Simulation Results ◽  
Traditional Counterpart ◽  
Coherent Modulation

This paper proposes an improved chaos-based M-ary modulation system. It reproduces deterministic chaotic dynamics to create M-ary non-coherent modulation. The proposed modulation system transmits data using autonomous chaotic sequences. It separates the chaotic dynamics through the use of interleavers and realigns them through the use deinterleavers. The simulation results show that the improved scheme overperforms its traditional counterpart. The degree of improvement grows as the M-ary order is increased, with a penalty of increased system complexity.

Secure Optical QAM Transmission Using Chaos Message Masking

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Farhan Qamar ◽  
Muhammad Khawar Islam ◽  
Romana Farhan ◽  
Mudassar Ali ◽  
Syed Zafar Ali Shah
Keyword(s):  
Optical Networks ◽  
Optical Communication ◽  
Binary Data ◽  
Data Stream ◽  
Modulation Scheme ◽  
Communication Link ◽  
Semiconductor Laser Diode ◽  
Chaotic Region ◽  
Data Rates ◽  
Point To Point

AbstractThis work presents the joint use of advance modulation scheme i. e. m-QAM and optical chaos to combine the best of the two advantages i. e. higher data rates and security. A semiconductor laser diode is driven into chaotic region using direct modulation scheme and 4-QAM signal is added by Chaos message masking (CMS). The chaotically masked data stream is transmitted over an optical communication link to investigate the propagation issues and synchronization of chaos at the receiver. The transmitted chaos is synchronized at the receiver to unmask the QAM stream and binary data by using subtraction rule and conventional QAM demodulator, respectively. The deterioration of constellation diagrams and bit error rate found dependent upon transmitter/receiver synchronization and link parameters. The use of 4-QAM chaotic scheme is extendable to m-QAM and is applicable to long haul, short haul point to point and for passive optical networks.

scholarly journals Identifying correlated heavy-hitters in a two-dimensional data stream

2015 ◽  
Vol 30 (4) ◽  
pp. 797-818 ◽  
Author(s):  
Bibudh Lahiri ◽  
Arko Provo Mukherjee ◽  
Srikanta Tirthapura
Keyword(s):  
Data Stream ◽  
Two Dimensional ◽  
Heavy Hitters

scholarly journals DUNE DAQ R&D integration in ProtoDUNE Single-Phase at CERN

2020 ◽  
Vol 245 ◽  
pp. 01019
Author(s):  
Roland Sipos
Keyword(s):  
Resource Utilization ◽  
Data Stream ◽  
Single Phase ◽  
Additional Data ◽  
The Self ◽  
Application Layer ◽  
Real Time Processing ◽  
Time Processing ◽  
Persistent Memory ◽  
Single Host

The DAQ system of ProtoDUNE-SP successfully proved its design principles and met the requirements of the beam run of 2018. The technical design of the DAQ system for the DUNE experiment has major differences compared to the prototype due to different requirements placed on the detector, as well as a radically different location of operation. The single-phase prototype at CERN is a major integration facility for R&D aspects of the DUNE DAQ system. The facility allows for the exploration of additional data processing capabilities and optimization of the FELIX system, which is the chosen TPC readout solution for the DUNE single-phase detectors. One of the fundamental differences from the prototype is that the DUNE DAQ relies on self-triggering. Therefore, real-time processing of the data stream for hit and trigger primitive finding is essential for the requirement of continuous readout. The supernova burst trigger requires a large and fast buffering technique, where 3D XPoint persistent memory solutions are evaluated and integrated. In order to maximize resource utilization of the FELIX hosting servers, the elimination of the 100 Gb network communication stack is desired. This implies the design and development of a single-host application layer, which is a fundamental element of the self-triggering chain. This paper discusses the evaluation and integration of these developments for the DUNE DAQ, in the ProtoDUNE environment.

scholarly journals Forensic Engineering Comparison Of Two & Three Dimensional Photogrammetric Accident Analysis

2000 ◽  
Vol 17 (1) ◽  
Author(s):  
Richard M. Ziernicki
Keyword(s):  
Additional Data ◽  
Three Dimensional ◽  
Computer Models ◽  
Accident Analysis ◽  
Two Dimensional ◽  
Software Packages ◽  
Forensic Engineering

One Of The Challenges For An Accident Reconstructionist Is To Create Accurate Scene Diagrams From Photographs. There Are Several Software Packages On The Market Today That Allow Engineers To Gather Dimensions From Photographs Through Photogrammetric Analysis. However, Not All Photogrammetric Software Performs The Same Functions. In Short, The Software Is Classified As Either Two-Dimensional (2-D) Or Three-Dimensional (3-D) Photogrammetric Software. 2-D Photogrammetry Software Accurately Rectifies A Photograph Given Certain 2-D Data From The Scene Such As The Length Of Lane Lines And/Or The Width Of The Roadway. 3-D Software Needs More Data To Perform The Rectification, And Without Additional Data, The Photogrammetric Analysis Can Be Inaccurate. The Strength Of The 3-D Photogrammetric Software Is Its Ability To Create Scaled Three-Dimensional Computer Models. This Paper Discusses The Application Of 2-D And 3-D Photogrammetry In Accident Analysis And Reconstruction.

VMCK Transmission System Design for SDR Applications

2014 ◽  
Vol 568-570 ◽  
pp. 1340-1344
Author(s):  
Liu Yang ◽  
Guo Xin Zheng ◽  
Chao Pan ◽  
Zhao Pu Chai
Keyword(s):  
Software Defined Radio ◽  
Data Stream ◽  
Intermediate Frequency ◽  
Transmission System ◽  
System Model ◽  
Transmission Model ◽  
Modulation Scheme ◽  
Bandwidth Efficiency ◽  
High Bandwidth ◽  
Small Form Factor

Very minimum chirp keying (VMCK) as a novel high bandwidth efficiency modulation scheme is implemented on small form factor (SFF) software-defined radio (SDR). The VMCK transmission system model is elaborated based on Simulink within Matlab. Also, the final demodulation data stream at the output of the VMCK transmission system shows good performance in simulation. The transmitter and the receiver are designed on the SDR platform. The VMCK baseband signals with 2.5MHz are transmitted from Matlab workspace by ROM block, and then the VMCK signals are ratio frequency (RF) modulated with 432MHz. In addition, the RF receiving intermediate frequency (IF) signals with 30MHz on the SDR platform. The VMCK transmission model is easy to implement and has strong properties to resist synchronization error.

Spectrophotometric measurements of objective-prism spectra

1966 ◽  
Vol 24 ◽  
pp. 118-119
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Progress Report ◽  
Two Dimensional ◽  
Objective Prism ◽  
Made In

I should like to give you a very condensed progress report on some spectrophotometric measurements of objective-prism spectra made in collaboration with H. Leicher at Bonn. The procedure used is almost completely automatic. The measurements are made with the help of a semi-automatic fully digitized registering microphotometer constructed by Hög-Hamburg. The reductions are carried out with the aid of a number of interconnected programmes written for the computer IBM 7090, beginning with the output of the photometer in the form of punched cards and ending with the printing-out of the final two-dimensional classifications.

Introductory paper

1966 ◽  
Vol 24 ◽  
pp. 3-5
Author(s):  
W. W. Morgan
Keyword(s):  
Line Intensity ◽  
Classification Scheme ◽  
Two Dimensional ◽  
Spectral Classification ◽  
Dimensional Array ◽  
Rr Lyrae ◽  
Metallic Line ◽  
Introductory Paper ◽  
Parameter Varying ◽  
Definition Of

1. The definition of “normal” stars in spectral classification changes with time; at the time of the publication of theYerkes Spectral Atlasthe term “normal” was applied to stars whose spectra could be fitted smoothly into a two-dimensional array. Thus, at that time, weak-lined spectra (RR Lyrae and HD 140283) would have been considered peculiar. At the present time we would tend to classify such spectra as “normal”—in a more complicated classification scheme which would have a parameter varying with metallic-line intensity within a specific spectral subdivision.

A one-dimensional self-gravitating stellar gas

1966 ◽  
Vol 25 ◽  
pp. 46-48 ◽  
Author(s):  
M. Lecar
Keyword(s):  
Gravitational Field ◽  
Phase Space ◽  
Motion Picture ◽  
Space Distribution ◽  
Two Dimensional ◽  
One Dimensional ◽  
Phase Space Distribution ◽  
Dimensional Phase Space ◽  
The Mean

“Dynamical mixing”, i.e. relaxation of a stellar phase space distribution through interaction with the mean gravitational field, is numerically investigated for a one-dimensional self-gravitating stellar gas. Qualitative results are presented in the form of a motion picture of the flow of phase points (representing homogeneous slabs of stars) in two-dimensional phase space.

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