SIMULATOR ERROR STREAM IN THE DATA CHANNEL WHEN RECEIVING BINARY DIGITAL RADIO SIGNALS

2019 ◽  
Vol 12 (2) ◽  
pp. 59-65
Author(s):  
В. Лавлинский ◽  
V. Lavlinskiy ◽  
Юрий Громов ◽  
Yuriy Gromov ◽  
Ирина Дидрих ◽  
...  
Keyword(s):  
Data Transmission ◽  
Data Exchange ◽  
Radio Channel ◽  
Flow Simulation ◽  
Phenomenological Approach ◽  
Digital Signals ◽  
Digital Radio ◽  
Data Channel ◽  
Radio Signals ◽  
Flow Simulator

Based on the phenomenological approach, a simulator of the error flow in the sequence of data transmitted over the radio channel is developed. The proposed version of the simulator takes into account the features of coherent and incoherent reception of the most common binary digital signals with relative phase and frequency manipulation. Within the framework of data transmission modeling, the adequacy of the results and the possibility of using the considered method of error flow simulation are fully confirmed. The developed error flow simulator allows to evaluate the potential qualitative characteristics of data transmission and the effectiveness of data exchange protocols using radio channels. At the same time, the simulator implements the connection of the structure and intensity of the generated error flow with the technical characteristics of the data transmission means used and the conditions of communication.

SIMULATOR ERROR STREAM IN THE DATA CHANNEL WHEN DIGITAL SIGNALS WITH SIXTEEN POSITIONAL QUADRATURE AMPLITUDE MANIPULATION

2019 ◽  
Vol 12 (2) ◽  
pp. 51-58
Author(s):  
В. Лавлинский ◽  
V. Lavlinskiy ◽  
Юрий Громов ◽  
Yuriy Gromov ◽  
Валерий Дидрих ◽  
...  
Keyword(s):  
Data Transmission ◽  
Radio Channel ◽  
Digital Signal ◽  
Phenomenological Approach ◽  
Transmission Channel ◽  
Digital Signals ◽  
Data Channel ◽  
Radio Signals ◽  
Euclidean Distances ◽  
Flow Simulator

The variant of realization of the error flow simulator in the data transmission channel with the use of radio signals with sixteen-position quadrature amplitude manipulation is considered. The simulator is based on a phenomenological approach to modeling the problem of distinguishing elements of a digital signal when comparing euclidean distances. The developed simulator allows you to set the parameters of the error flow in the sequence of transmitted data, based on the technical characteristics of the data trans-mission and communication conditions in the radio channel. The adequacy of the results obtained in the simulation of the error flow is confirmed by their comparison with the theoretically justified characteristics of the error intensity in the data transmission channel in the case of quadra-tural amplitude manipulation.

SIMULATOR ERROR STREAM IN THE DATA CHANNEL WHEN DIGITAL SIGNALS WITH A QUADRATURE PHASE SHIFT KEYING

2019 ◽  
Vol 12 (3) ◽  
pp. 65-71
Author(s):  
Валерий Лавлинский ◽  
V. Lavlinskiy ◽  
Юрий Громов ◽  
Yuriy Gromov ◽  
Валерий Дидрих ◽  
...  
Keyword(s):  
Data Transmission ◽  
Radio Channel ◽  
Digital Signals ◽  
Flow Parameters ◽  
Quadrature Phase ◽  
Shift Keying ◽  
Limited Frequency ◽  
Phase Manipulation ◽  
Modeling Data ◽  
Flow Simulator

A variant of constructing an error flow simulator in a sequence of data transmitted over the radio channel using a signal with quadrature phase manipulation is proposed. The developed simulator takes into account the features of the implemented in practice coherent reception of signals with multi-position phase manipulation in the transmission of data in a digital communication channel. The adequacy of the results obtained by its use is confirmed in the process of modeling data transmission in a limited frequency resource channel. The expediency of using the proposed error flow simulator is due to the possibility of correlating the error flow parameters with the technical characteristics of the data transmission system and the intensity of interference in the radio channel.

scholarly journals VLC signal reconstruction with wavel transform in turbulence environment

2018 ◽  
Vol 7 (2.20) ◽  
pp. 178
Author(s):  
R Logarasu ◽  
Dr R. Dhanasekaran
Keyword(s):  
Data Transmission ◽  
Data Exchange ◽  
Signal Reconstruction ◽  
Optimal Solution ◽  
Signal Wave ◽  
Wireless Data ◽  
Noise Level Estimation ◽  
Wireless Data Transmission ◽  
Radio Signals ◽  
Environment Noise

Communication involves exchange of data between sender and receiver. The data exchange complexity reduce with wireless data transmission. Conventionally radio signals use for wireless data transmission. The radio frequency limited band width and requirement of new hardware installation make LIFI an optimal solution for wireless data transmission. Since the existing LEDs can be used for data transmission. Recent trends in LiFi have made it possible to transmit data at THz frequency. However, the LiFi signals easily degrade due to surrounding environment noise. In this paper, we propose to reconstruct and eliminate noise in LiFi signal. Wave coefficient block apply for noise level estimation and filter banks use to reconstruct original message signal.  

The efficacy of sinus plication in aortic valvuloplasty for bicuspid aortic valve: experiments in a pulsatile flow simulation model

2021 ◽  
Author(s):  
Satoshi Arimura ◽  
Jumpei Takada ◽  
Gohki Nishimura ◽  
Natsuki Nakama ◽  
Eita Kawasaki ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Bicuspid Aortic Valve ◽  
Pulsatile Flow ◽  
Flow Simulation ◽  
Ultrasound Measurement ◽  
Hydrodynamic Effect ◽  
Promising Tool ◽  
Aortic Valvuloplasty ◽  
Flow Simulator

Abstract OBJECTIVES Sinus plication has emerged as a promising tool that can lead to better stability in bicuspid aortic valve (BAV) repair. However, the mechanisms underlying the efficacy of this technique are unclear. We evaluated the hydrodynamic effect of sinus plication using the experimental pulsatile flow simulator and our original BAV model in vitro. METHODS Based on the computed tomography data of a BAV patient who had undergone aortic valvuloplasty, a BAV model (group C, n = 6) was developed with bovine pericardium and vascular prosthesis (J-graft Shield Neo Valsalva 24 mm). We performed sinus plication (group SP, n = 6) in the BAV model and compared hydrodynamic data with the control model in the pulsatile flow simulator. Non-fused cusp angle, annulus diameter and effective height were measured by ultrasonography. RESULTS The average flow was significantly increased in group SP compared to group C (4.24 ± 0.14 l/min vs 4.14 ± 0.15 l/min, respectively, P = 0.034). The mean transvalvular pressure gradient and regurgitant fraction were significantly decreased in group SP compared to group C (11.6 ± 4.3 mmHg vs 16.6 ± 5.0 mmHg, respectively, P = 0.009 and 14.1 ± 2.0% vs 17.4 ± 2.1%, respectively, P = 0.001). Ultrasound measurement indicated that non-fused cusp angle was significantly increased in group SP compared to group C (163.8° ± 9.2° vs 153.0° ± 4.6°, respectively, P = 0.012). CONCLUSIONS Sinus plication in the BAV model significantly increased the commissural angle. It was effective in not only controlling regurgitation but also improving valve opening. These finding should be confirmed by evaluating cusp stress and/or long-term durability in the future studies.

scholarly journals ISO/IEEE 11073 Treadmill Interoperability Framework and its Test Method: Design and Implementation (Preprint)

2020 ◽  
Author(s):  
Zhi Yong Huang ◽  
Yujie Wang ◽  
Linling Wang
Keyword(s):  
Data Transmission ◽  
Data Exchange ◽  
Service Providers ◽  
Test Method ◽  
Noncommunicable Diseases ◽  
Management Service ◽  
Transmission Scheme ◽  
Compliance Testing ◽  
Health And Fitness ◽  
Ieee 11073

BACKGROUND Regular physical activity is proven to help prevent and treat noncommunicable diseases such as heart disease, stroke, diabetes, and breast and colon cancer. The exercise data generated by health and fitness devices (eg, treadmill, exercise bike) are very important for health management service providers to develop personalized training programs. However, at present, there is little research on a unified interoperability framework in the health and fitness domain, and there are not many solutions; besides, the privatized treadmill data transmission scheme is not conducive to data integration and analysis. OBJECTIVE This article will expand the IEEE 11073-PHD standard protocol family, develop standards for health and fitness device (using treadmill as an example) based on the latest version of the 11073-20601 optimized exchange protocol, and design protocol standards compliance testing process and inspection software, which can automatically detect whether the instantiated object of the treadmill meets the standard. METHODS The study includes the following steps: (1) Map the data transmitted by the treadmill to the 11073-PHD objects; (2) Construct a programming language structure corresponding to the 11073-PHD application protocol data unit (APDU) to complete the coding and decoding part of the test software; and (3) Transmit the instantiated simulated treadmill data to the gateway test software through transmission control protocol for standard compliance testing. RESULTS According to the characteristics of the treadmill, a data exchange framework conforming to 11073-PHD is constructed, and a corresponding testing framework is developed; a treadmill agent simulation is implemented, and the interoperability test is performed. Through the designed testing process, the corresponding testing software was developed to complete the standard compliance testing of the treadmill. CONCLUSIONS The extended research of IEEE 11073-PHD in the field of health and fitness provides a potential new idea for the data transmission framework of sports equipment such as treadmills, which may also provide some help for the development of sports health equipment interoperability standards.

scholarly journals Centrally Reserved Access Model to the Medium in Digital Radio Communication Networks

2020 ◽  
Vol 19 (6) ◽  
pp. 1332-1356
Author(s):  
Maksim Peregudov ◽  
Anatoliy Steshkovoy
Keyword(s):  
Ieee 802.11 ◽  
Communication Networks ◽  
Data Transmission ◽  
Multiple Access ◽  
Model Development ◽  
Transmission Channel ◽  
Radio Communication ◽  
Digital Radio ◽  
Relationship Of ◽  
Sequential Relationship

Currently, centrally reserved access to the medium in the digital radio communication networks of the IEEE 802.11 family standards is an alternative to random multiple access to the environment such as CSMA/CA and is mainly used in the transmission voice and video messages in real time. Centrally reserved access to the environment determines the scope of interest in it from attackers. However, the assessment of effectiveness of centrally reserved access to the environment under the conditions of potentially possible destructive impacts was not carried out and therefore it is impossible to assess the contribution of such impacts to the decrease in the effectiveness of such access. Also, the stage establishing of centrally reserved access to the environment was not previously taken into account. Analytical model development of centrally reserved access to the environment under the conditions of destructive influences in digital radio communication networks of the IEEE 802.11 family standards. A mathematical model of centrally reserved access to the environment has been developed, taking into account not only the stage of its functioning, but also the stage of formation under the conditions of destructive influences by the attacker. Moreover, in the model the stage of establishing centrally reserved access to the medium displays a sequential relationship of such access, synchronization elements in digital radio communication networks and random multiple access to the medium of the CSMA/CA type. It was established that collisions in the data transmission channel caused by destructive influences can eliminate centrally reserved access to the medium even at the stage of its establishment. The model is applicable in the design of digital radio communication networks of the IEEE 802.11 family of standards, the optimization of such networks of the operation, and the detection of potential destructive effects by an attacker.

scholarly journals Publish and Subscribe-Based Formation and Containment Control of Heterogeneous Robotic System with Actuator Time Delay

2021 ◽  
Vol 11 (19) ◽  
pp. 9145
Author(s):  
Siddig M. Elkhider ◽  
Omar Al-Buraiki ◽  
Sami El-Ferik
Keyword(s):  
Time Delay ◽  
Obstacle Avoidance ◽  
Data Transmission ◽  
Data Exchange ◽  
Autonomous Underwater Vehicles ◽  
Underwater Vehicles ◽  
Containment Control ◽  
L1 Adaptive Control ◽  
Navigation Algorithm ◽  
Local Controller

This paper addresses the problem of controlling a heterogeneous system composed of multiple Unmanned Aerial Vehicles (UAVs) and Autonomous Underwater Vehicles (AUVs) for formation and containment maintenance. The proposed approach considers actuator time delay and, in addition to formation and containment, considers obstacle avoidance, and offers a robust navigation algorithm and uses a reliable middleware for data transmission and exchange. The methodology followed uses both flocking technique and modified L1 adaptive control to ensure the proper navigation and coordination while avoiding obstacles. The data exchange between all the agents is provided through the data distribution services (DDS) middleware, which solves the interoperability issue when dealing with heterogeneous multiagent systems. The modified L1 controller is a local controller for stabilizing the dynamic model of each UAV and AUV, and the flocking approach is used to coordinate the followers around the leader or within the space delimited by their leaders. Potential Field (PF) allows obstacle avoidance during the agents’ movement. The performance of the proposed approach under the considerations mentioned above are verified and demonstrated using simulations.

scholarly journals Simulation and Measurement Studies of The Vdes System’s Terrestrial Component

2019 ◽  
Vol 26 (1) ◽  
pp. 95-106 ◽  
Author(s):  
Krzysztof Bronk ◽  
Patryk Koncicki ◽  
Adam Lipka ◽  
Dominik Rutkowski ◽  
Błażej Wereszko
Keyword(s):  
Data Transmission ◽  
Data Exchange ◽  
Technical Information ◽  
Theoretical Data ◽  
Current Version ◽  
Coding Gain ◽  
Exchange System ◽  
Measurement Results ◽  
Simulation Results ◽  
Theoretical Results

Abstract In the paper, the measurement and simulation results of the VDES (VHF Data Exchange System) terrestrial component are discussed. It is anticipated that VDES will be one of the major solutions for maritime communications in the VHF band and its performance will be sufficient to fulfill the requirements of the e-navigation applications. The process of the VDES standardization (ITU R, IALA) has not been officially completed yet, but substantial amount of technical information about the future system’s terrestrial component (VDE-TER) is already available. The paper is divided into three general parts: (a) theoretical presentation of the system’s physical layer and the radio channels applicable to VDES, (b) simulation results (BER, BLER, channel delay between two propagation paths and its influence on bit rates) and (c) measurement results (useful ranges, BER). It turned out that in real maritime conditions, the VDES system can offer ranges between 25 and 38 km for the configurations assumed during the measurement campaign. Those results are generally compliant with the theoretical data in the line-of-sight conditions. In the NLOS scenarios, where fading becomes the dominant phenomenon, the discrepancies between the measurements and the theoretical results were more significant. The obtained results confirmed that VDES provides a large coding gain, which significantly improves the performance of data transmission and increases the bit rate compared to the existing maritime radiocommunication solutions. It should be noted that the results presented in the article were used by the IALA while developing the current version of the VDES specification.

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