scholarly journals Control of Two Satellites Relative Motion over the Packet Erasure Communication Channel with Limited Transmission Rate Based on Adaptive Coder

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2032
Author(s):  
Boris Andrievsky ◽  
Alexander L. Fradkov ◽  
Elena V. Kudryashova
Keyword(s):  
Relative Motion ◽  
Data Transmission ◽  
Data Exchange ◽  
Communication Channel ◽  
Numerical Study ◽  
Transmission Rate ◽  
Transmission Error ◽  
High Data ◽  
Navigation Data ◽  
Erasure Probability

The paper deals with the navigation data exchange between two satellites moving in a swarm. It is focused on the reduction of the inter-satellite demanded communication channel capacity taking into account the dynamics of the satellites relative motion and possible erasures in the channel navigation data. The feedback control law is designed ensuring the regulation of the relative satellites motion. The adaptive binary coding/decoding procedure for the satellites navigation data transmission over the limited capacity communication channel is proposed and studied for the cases of ideal and erasure channels. Results of the numerical study of the closed-loop system performance and accuracy of the data transmission algorithm on the communication channel bitrate and erasure probability are obtained by extensive simulations. It is shown that both data transmission error and regulation time depend approximately inversely proportionally on the communication rate. In addition the erasure of data in the channel with probability up to 0.3 does not influence the regulation time for sufficiently high data transmission rate.

scholarly journals Adaptive Coding in Control of Two Satellites Relative Motion Over the Packet Erasure Communication Channel

2020 ◽  
Author(s):  
Boris Andrievsky ◽  
Alexander Fradkov ◽  
Elena Kudryashova
Keyword(s):  
Data Transmission ◽  
Data Exchange ◽  
Communication Channel ◽  
Transmission Rate ◽  
Control Law ◽  
Data Transmission Rate ◽  
High Data ◽  
Navigation Data ◽  
Binary Coding

The paper is focused on the navigation data exchange between two satellites moved in a swarm. The feedback control law is designed ensuring regulation of the relative satellites motion. The adaptive binary coding/decoding procedure for data transmission over the limited capacity communication channel is proposed and studied for the cases of ideal and erasure channel. Dependence of the regulation time on the data transmission rate is numerically found. The results obtained provides dependence of the required load of the communication channel on the desired quality of the stabilization process. It is demonstrated that for significantly high data transmission rate erasure of data in the channel with probability up to 0.3 does not make an effect on the regulation time.

QoS-Constrained Resource Allocation Scheduling for LTE Network

2015 ◽  
Vol 4 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Hung-Chin Jang ◽  
Yun-Jun Lee
Keyword(s):  
Resource Allocation ◽  
Data Transmission ◽  
Orthogonal Frequency Division Multiplexing ◽  
Transmission Rate ◽  
High Mobility ◽  
System Throughput ◽  
Frequency Division ◽  
High Data ◽  
Single Carrier ◽  
Allocation Method

The goal of LTE (Long Term Evolution) is to provide high data transmission rate, scalable bandwidth, low latency, high-mobility, etc. LTE employs OFDM (Orthogonal Frequency Division Multiplexing) and SC-FDMA (Single Carrier - Frequency Division Multiple Access) for downlink and uplink data transmission, respectively. As to SC-FDMA, there are two constraints in doing resource allocation. First, the allocated resource blocks (RBs) should be contiguous. Second, those of the allocated RBs are forced to use the same modulation technique. The aim of this research is to propose a QoS-constraint resource allocation scheduling to enhance data transmission for uplink SC-FDMA. The proposed scheduling is a three-stage approach. In the first stage, it uses a time domain scheduler to differentiate user equipment (UE) services according to their distinct QoS service requirements. In the second stage, it uses a frequency domain scheduler to prioritize UE services based on channel quality. In the third stage, it limits the number of times of modulation downgrade of RBs allocation in order to enhance system throughput. In the simulations, the proposed method is compared to fixed sub-carrier dynamic resource allocation method and adaptive dynamic sub-carrier resource allocation method. Simulation results show that the proposed method outperforms the other two methods in terms of throughput, transmission delay, packet loss ratio, and RB utilization.

scholarly journals SPREAD SPECTRUM TECHNOLOGY RESEARCH AND ITS APPLICATION IN POWER LINE COMMUNICATION SYSTEMS

T-Comm ◽  
2020 ◽  
Vol 14 (10) ◽  
pp. 45-52
Author(s):  
Edgar M. Dmitriyev ◽  
◽  
Eugeny V. Rogozhnikov ◽  
Andrey K. Movchan ◽  
Semyon M. Mukhamadiev ◽  
...  
Keyword(s):  
Data Transmission ◽  
Spread Spectrum ◽  
Communication Systems ◽  
High Speed ◽  
Transmission Rate ◽  
Power Lines ◽  
Transmission Systems ◽  
Data Transmission Rate ◽  
High Data ◽  
Speed Data Transmission

In the presented article, the results of the research of the spreading spectrum technology are given and its use in communication systems based on the data transmission over power lines is considered. One of the currently existing problems of data transmission systems over power lines is the absence of a compromise solution in ensuring the required data transmission rate and communication range. Ready-made solutions existing on the market provide either high data transmission rates over short distances or a communication long-range with rates not exceeding several tens of kilobits per second. The purpose of the article is to research the application of spread spectrum technology in data transmission systems over power lines. In the course of the experiment, it was found that the joint use of OFDM technology and the spread spectrum technology makes it possible to form a solution that provides communication over power lines over a distance of tens of meters with a data transmission rate of at least 5 Mbps. This article compares the TP-Link 500 Mbps modem for broadband high-speed data transmission, and the NWEPLC-1-G3M modem for narrowband low-speed data transmission. The results of modeling a communication system with different lengths and types of spreading sequences for BPSK and QPSK modulations are presented. An assessment of the interference protection was carried out. The results of an experimental research of the spectrum spreading technology on a model of a data transmission system over power lines in terms of range and transmission rate in comparison with existing devices on the market are presented. The results obtained can be used in the design of communication systems over power lines.

scholarly journals Laser measured rate equations with various transmission coders for optimum of data transmission error rates

2020 ◽  
Vol 20 (3) ◽  
pp. 1406 ◽  
Author(s):  
Hazem M. El-Hageen ◽  
Aadel M. Alatwi ◽  
Ahmed Nabih Zaki Rashed
Keyword(s):  
Data Transmission ◽  
Differential Pulse ◽  
Transmission Error ◽  
Error Rates ◽  
Superior Performance ◽  
Rate Equations ◽  
Pulse Position Modulation ◽  
High Data ◽  
Measured Rate ◽  
Rate Transmission

<p>          </p><p>The present study has outlined laser-measured rate equations with various transmission coders for optimum data transmission error rates. Various modulation transmission coders are employed, such as a pulse position modulation coder, a differential pulse intensity modulation coder, and a four band/five band modulation transmission coder, in order to create optimized data rates of up to 40 GB/s for a fiber extension length of up to 100 km. This study has emphasized the important role of pulse position modulation transmission coders, which exhibit superior performance in max. Q parameter and min. data error rates, even for high data rate transmission.  </p>

Intelligent Heat Meter of Monitoring and Controlling System for Heating Supply Based on GPRS Network

2012 ◽  
Vol 614-615 ◽  
pp. 695-700 ◽  
Author(s):  
Xing Zhe Piao ◽  
Yu Shan Xue ◽  
Cheng Gao ◽  
Ying Shun Li
Keyword(s):  
Real Time ◽  
Data Transmission ◽  
Data Exchange ◽  
Transmission Rate ◽  
Measuring Instruments ◽  
Heat Meter ◽  
Time Data ◽  
Data Transmission Rate ◽  
Lc Oscillator ◽  
And Control

In order to realize long-range real-time online monitor and control of the measured data on the spot, and bring about control consumption of heat-energy according to need, a heat meter is developed for heating supply based on GPRS network technology. Low-power single-chip microcomputer MSP430FW427 is adopted as the measuring instruments in which SIEMENS MC55 module was used as a GPRS communication and LC oscillator coupling technology as flow sensor. In addition, the measurement principle of the heat quantity, the design methods of the software and hardware for heat meter are explained in detail, and the mathematical models of temperature and liquid sensor are established in the paper. Application of GPRS communication technology provides a transparent data transmission channel, thus realizing real-time data exchange between fared knots and monitoring center. On-the-spot operations prove that when the system is in real operation, data transmission rate is about 61.8kbps, thus having more advantages of security，accuracy and data transmission rate, effectively solving the problem of a large number of investment on traditional remote monitoring and control system.

scholarly journals Novel Analytical Framework for harnessing Cognitive Radio Resource Optimization in 5G Networks

2019 ◽  
Vol 9 (2) ◽  
pp. 3017-3022
Keyword(s):  
Cognitive Radio ◽  
Data Transmission ◽  
Transmission Rate ◽  
Environmental Parameters ◽  
Analytical Framework ◽  
Optimization Approach ◽  
5G Networks ◽  
High Data ◽  
5G Network ◽  
Resource Allocation Scheme

The adoption of cognitive radio technology is characterized by various beneficial characteristics that can facilitate better spectrum sensing performance in a 5G network and thereby acting as a boosting element towards a high data transmission rate. However, it is also characterized by various challenges that limit the significant development in resource utilization in 5G. Therefore, this paper introduces a novel and simplified mechanism that facilitates the 5G network to perform better in data transmission and its associated quality of it. The proposed system also performs modeling using practical constraints associated with the usage of cognitive radio over 5G networks using a convex optimization approach. The model is simulated using practical environmental parameters to prove that the proposed system excels better performance in faster processing and quality signal in contrast to the existing resource allocation scheme exercised in 5G networks.

scholarly journals Bluetooth Low Energy Wireless Sensor Network Library in MATLAB Simulink

2020 ◽  
Vol 9 (3) ◽  
pp. 38
Author(s):  
Rolands Shavelis ◽  
Kaspars Ozols
Keyword(s):  
Data Exchange ◽  
Transmission Rate ◽  
Packet Transmission ◽  
Data Packet ◽  
Low Energy ◽  
Wireless Sensor ◽  
Channel Noise ◽  
Bluetooth Low Energy ◽  
Matlab Simulink ◽  
High Data

The paper describes the elements of the developed MATLAB Simulink library for building the models of Bluetooth Low Energy (BLE) wireless sensor networks to simulate the communication between BLE devices in the presence of interference and channel noise. Various parameters can be configured for the devices including their 2D positions to take into account the distances between them for calculating the attenuation coefficients of the transmitted signals. Two simulation examples are provided, one of which demonstrates the data exchange between one master device and one slave at high data packet transmission rate (2 kHz), while the other example shows the data exchange between one master and multiple slaves simultaneously, in which case the data packet transmission rate can be no larger than 133 Hz.

scholarly journals Shipboard Data Compression Method for Sustainable Real-Time Maritime Communication in Remote Voyage Monitoring of Autonomous Ships

2021 ◽  
Vol 13 (15) ◽  
pp. 8264
Author(s):  
Irena Jurdana ◽  
Nikola Lopac ◽  
Nobukazu Wakabayashi ◽  
Hongze Liu
Keyword(s):  
Data Compression ◽  
Real Time ◽  
Data Transmission ◽  
Information Exchange ◽  
Data Exchange ◽  
Transmission Rate ◽  
Digital Data ◽  
Monitoring And Control ◽  
Compression Method ◽  
Data Encoding

Due to the ever-increasing amount of data collected and the requirements for the rapid and reliable exchange of information across many interconnected communication devices, land-based communications networks are experiencing continuous progress and improvement of existing infrastructures. However, maritime communications are still characterized by slow communication speeds and limited communication capacity, despite a similar trend of increasing demand for information exchange. These limitations are particularly evident in digital data exchange, which is still limited to relatively slow and expensive narrowband satellite transmission. Furthermore, with the increasing digitalization of ships and introducing the sustainable concept of autonomous ship operation, large amounts of collected data need to be transmitted in real-time to enable remote voyage monitoring and control, putting additional pressure on the already strained means of maritime communications. In this paper, an adaptive shipboard data compression method based on differential binary encoding is proposed for real-time maritime data transmission. The proposed approach is verified on the actual data collected on board a training ship equipped with the latest data acquisition system. The obtained results show that the proposed data encoding method efficiently reduces the transmitted data size to an average of 3.4% of the original shipboard data, thus significantly reducing the required data transmission rate. Moreover, the proposed method outperforms several other tested competing methods for shipboard data encoding by up to 69.6% in terms of compression efficiency. Therefore, this study suggests that the proposed data compression approach can be a viable and efficient solution for transmitting large amounts of digital shipboard data in sustainable maritime real-time communications.

scholarly journals Energy Efficient Generic Demodulator for High Data Transmission Rate Over an Inductive Link for Implantable Devices

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 159379-159389
Author(s):  
Aref Trigui ◽  
Mohamed Ali ◽  
Ahmed Chiheb Ammari ◽  
Yvon Savaria ◽  
Mohamad Sawan
Keyword(s):  
Data Transmission ◽  
Energy Efficient ◽  
Transmission Rate ◽  
Implantable Devices ◽  
Inductive Link ◽  
Data Transmission Rate ◽  
High Data
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