scholarly journals The effective algorithm of ensuring the integrity of the transmitted information

2021 ◽  
Vol 57 (4) ◽  
pp. 506-512
Author(s):  
I. L. Kuznetsova ◽  
A. S. Poljakov
Keyword(s):  
Error Detection ◽  
Communication Systems ◽  
High Speed ◽  
Correction Method ◽  
Detection Algorithm ◽  
Binary Matrix ◽  
Transmitted Information ◽  
Information And Communication ◽  
Binary Matrices ◽  
Transfer Of Information

The problem of ensuring the integrity of the transmitted information in modern information and communication systems is considered in this paper. An optimized algorithm for detecting and correcting errors in the information transmitted over communication lines is proposed. It was developed on the basis of the results of previous studies of the error correction method based on the parity values of the coordinates of a binary matrix. An easy-to-implement, high-speed and efficient error detection algorithm is proposed which is focused on the use of small binary matrices, for example, (4 × 8) or (7 × 8) bits. In such matrices, the possible number of errors that appear in them during the transfer of information is relatively small and easily detected.

A New Approach of Detection Algorithm for Reducing Computation Complexity of MIMO systems

2016 ◽  
Vol 1 (1) ◽  
pp. 159
Author(s):  
Mohammed Qasim Sulttan
Keyword(s):  
Communication Systems ◽  
High Speed ◽  
Mimo Systems ◽  
Symbol Error Rate ◽  
Detection Algorithm ◽  
Practical Implementation ◽  
High Complexity ◽  
Computation Complexity ◽  
Sphere Decoder ◽  
Manhattan Metric

<p>Multiple-Input Multiple-Output (MIMO) technique is a key technology to strengthen and achieve high-speed and high-throughput wireless communications. . In recent years, it was observed that frequent detecting techniques could improve the performance (e.g., symbol error rate ‘SER’) of different modern digital communication systems. But these systems faced a problem of high complexity for the practical implementation.  To solve the problem of high complexity, this work proposed Frequent Improve K-best Sphere Decoding (FIKSD) algorithm with stopping rule depending on the Manhattan metric. Manhattan metric is proposed to use with FIKSD in order to achieve the lowest complexity. FIKSD is a powerful tool to achieve a high performance close to the maximum likelihood (ML), with less complexity. The simulation results show a good reduction in computation complexity with a cost of slight performance degradation within 1dB; the proposed FIKSD requires 0% to 94% and 82% to 97% less complexity than Improved K-best Sphere Decoder (IKSD) and K-best Sphere Decoder (KSD) respectively. This makes the algorithm more suitable for implementation in wireless communication systems.</p>

scholarly journals An Improved Jacobi-Based Detector for Massive MIMO Systems

Information ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 165 ◽  
Author(s):  
Xiaoqing Zhao ◽  
Zhengquan Li ◽  
Song Xing ◽  
Yang Liu ◽  
Qiong Wu ◽  
...  
Keyword(s):  
Massive Mimo ◽  
Communication Systems ◽  
Mimo Systems ◽  
Minimum Mean Square Error ◽  
Multiple Input Multiple Output ◽  
Correction Method ◽  
Detection Algorithm ◽  
Detection Accuracy ◽  
Input Multiple Output ◽  
Mmse Detector

Massive multiple-input-multiple-output (MIMO) is one of the key technologies in the fifth generation (5G) cellular communication systems. For uplink massive MIMO systems, the typical linear detection such as minimum mean square error (MMSE) presents a near-optimal performance. Due to the required direct matrix inverse, however, the MMSE detection algorithm becomes computationally very expensive, especially when the number of users is large. For achieving the high detection accuracy as well as reducing the computational complexity in massive MIMO systems, we propose an improved Jacobi iterative algorithm by accelerating the convergence rate in the signal detection process.Specifically, the steepest descent (SD) method is utilized to achieve an efficient searching direction. Then, the whole-correction method is applied to update the iterative process. As the result, the fast convergence and the low computationally complexity of the proposed Jacobi-based algorithm are obtained and proved. Simulation results also demonstrate that the proposed algorithm performs better than the conventional algorithms in terms of the bit error rate (BER) and achieves a near-optimal detection accuracy as the typical MMSE detector, but utilizing a small number of iterations.

An Analysis of a Successful Emergency Telemedicine Venture

2009 ◽  
pp. 215-227
Author(s):  
Jelena Vucetic
Keyword(s):  
Information System ◽  
Emergency Care ◽  
Communication Systems ◽  
Personal Information ◽  
Medical Personnel ◽  
Critical Importance ◽  
Information And Communication ◽  
Voice Data ◽  
Transfer Of Information ◽  
New Generation

This paper describes business and technological challenges and solutions for a successful emergency telemedicine venture called MediComm. Its objective is to provide a new generation of integrated information and communication systems, targeting medical and emergency care organizations. This system enables multi-directional transfer of information (including voice, data, fax, video) between the organization’s central information system and its mobile fleet of ambulance vehicles. MediComm enables emergency care personnel to take a patient’s vital measurements and personal information in an ambulance on the way to the hospital, send the information to the hospital, and receive from the hospital directions for the patient’s treatment during transportation. When the patient arrives into the hospital, his/her information will be already updated in the information system, and the medical personnel will be ready to provide the necessary care immediately. Thus, time will be saved, which for many patients is of critical importance. The treatment of patients will be more effective and simplified, which will result in substantially lower cost of medical care.

Creating an internet connection in places where telecommunications technologies are not available

2020 ◽  
pp. 67-75
Author(s):  
D.M. Egorov ◽  
◽  
D.V. Zakal’sky ◽  
Keyword(s):  
Communication Systems ◽  
Smart Home ◽  
High Speed ◽  
Accurate Analysis ◽  
Smart Building ◽  
Internet Connection ◽  
Lack Of Information ◽  
Information And Communication ◽  
Home Technology ◽  
Smart Home Technology

The Object of the research is the problem of the lack of information and communication and network benefits outside the cities in Russia.The purpose of the work is to study the signal level at a certain object located in the Primorsky territory, Oktyabrsky district, the village of Sinelnikovo 2 for the installation of Smart home technology. If the signal level is insufficient, you need to offer a solution to improve communication.As a result of the work, a residential object was selected, on which the innovative «Smart home»technology was installed. A stable and fast Internet connection is required for the full operation of smart building technology. The appropriate option for accessing the Internet is to use high-speed mobile 4G Internet. Since the object is located far from a major city, there is a need to investigate the presence of communication systems. To do this, the software used for analyzing and demonstrating the signal level in the selected area is defined, and the features and characteristics of the selected utilities are described. Then the signal level was measured at the set area at eleven points for more accurate analysis. The obtained data are described, and the corresponding conclusions are made on them. In the course of the research, the problem arose of the lack of enough communication generation for the functioning of the «Smart home» system. Certain steps of a recommendatory nature are pros:posed to solve this problem. The equipment used, its characteristics and description are demonstrated. The results of this work are presented, and conclusions are drawn.

scholarly journals Efficiency of the error correction method by the parity values of binary matrix coordinates

2019 ◽  
Vol 55 (3) ◽  
pp. 375-382
Author(s):  
A. S. Poljakov ◽  
I. L. Kuznetsova
Keyword(s):  
Error Correction ◽  
Bit Error Rate ◽  
Correction Method ◽  
Optimal Choice ◽  
Binary Matrix ◽  
Error Correction Method ◽  
Binary Matrices ◽  
Information Errors ◽  
Communication Lines ◽  
Intensity Density

The results of study of the characteristics of the proposed method [1] for correction of errors arising during information transmission via communication lines are presented. The estimates of the efficiency of search for errors and the performance of an algorithm developed to realize the proposed method using the parity values of binary matrix coordinates are obtained; among these errors are rows, columns, main and auxiliary diagonals, are obtained. We have determined the dependence of algorithm characteristics on the intensity (density) of bit errors in the message obtained after transmission via communication lines and on the size of matrices, into which a transmitted message is divided.The time spent for calculating the parity values of matrix coordinates and for the algorithm used to find transmitted information errors are given. Recommendations on an optimal choice of sizes of binary matrices are presented. It is shown that, when the bit error rate is 10–2 and less, the algorithm detects all the available errors.

An Unmanned Aircraft System for Maritime Operations: The Automatic Detection Subsystem

2021 ◽  
Vol 55 (1) ◽  
pp. 38-49
Author(s):  
Mario Monteiro Marques ◽  
Victor Lobo ◽  
A. Pedro Aguiar ◽  
J. Estrela Silva ◽  
J. Borges de Sousa ◽  
...  
Keyword(s):  
Situation Awareness ◽  
Optical Sensors ◽  
Communication Systems ◽  
High Speed ◽  
Environmental Parameters ◽  
Automatic Detection ◽  
Detection Algorithm ◽  
Unmanned Aircraft ◽  
Integrated System ◽  
Human Operators

AbstractThis paper addresses the development of an integrated system to support maritime situation awareness based on unmanned aerial vehicles (UAVs), emphasizing the role of the automatic detection subsystem. One of the main topics of research in the SEAGULL project was the automatic detection of sea vessels from sensors onboard the UAV, to help human operators in the generation of situational awareness of maritime events such as (a) detection and geo-referencing of oil spills or hazardous and noxious substances, (b) tracking systems (e.g., vessels, shipwrecks, lifeboats, debris), (c) recognizing behavioral patterns (e.g., vessels rendezvous, high-speed vessels, atypical patterns of navigation), and (d) monitoring environmental parameters and indicators. We describe a system composed of optical sensors, an embedded computer, communication systems, and a vessel detection algorithm that can run in real time in the embedded UAV hardware and provide to human operators vessel detections with low latency, high precision rates (about 99%), and suitable recalls (>50%), which is comparable to other more computationally intensive state-of-the-art approaches. Field test results, including the detection of lifesavers and multiple vessels in red-green-and-blue (RGB) and thermal images, are presented and discussed.

Recent Advances in Ultra-High-Speed Waveguide Photodiodes for Optical Communication Systems

2009 ◽  
Vol E92-C (7) ◽  
pp. 922-928 ◽  
Author(s):  
Kikuo MAKITA ◽  
Kazuhiro SHIBA ◽  
Takeshi NAKATA ◽  
Emiko MIZUKI ◽  
Sawaki WATANABE
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
High Speed ◽  
Recent Advances ◽  
Ultra High Speed ◽  
Optical Communication Systems

INNOVATIVE METHOD OF SATELLITE COMMUNICATION

2019 ◽  
Author(s):  
Teodor Narytnik ◽  
Vladimir Saiko
Keyword(s):  
Communication Systems ◽  
High Speed ◽  
Satellite Communication ◽  
Radio Channel ◽  
Satellite Communications ◽  
Service Area ◽  
Satellite Systems ◽  
Orbit Satellite ◽  
Geometric Size ◽  
Distributed Satellite

The technical aspects of the main promising projects in the segments of medium and low-orbit satellite communication systems are considered, as well as the project of the domestic low-orbit information and telecommunications system using the terahertz range, which is based on the use of satellite platforms of the micro- and nanosatellite class and the distribution of functional blocks of complex satellite payloads more high-end on multiple functionally related satellites. The proposed system of low-orbit satellite communications represents the groupings of low-orbit spacecraft (LEO-system) with the architecture of a "distributed satellite", which include the groupings of the root (leading) satellites and satellite repeaters (slaves). Root satellites are interconnected in a ring network by high-speed links between the satellites. The geometric size of the “distributed satellite” is the area around the root satellite with a radius of about 1 km. The combination of beams, which are formed by the repeater satellites, make up the service area of the LEO system. The requirements for the integrated service area of the LEO system (geographical service area) determine the requirements for the number of distributed satellites in the system as a whole. In the proposed system to reduce mutual interference between the grouping of the root (leading) satellites and repeater satellites (slaves) and, accordingly, minimizing distortions of the information signal when implementing inter-satellite communication, this line (radio channel) was created in an unlicensed frequency (e.g., in the terahertz 140 GHz) range. In addition, it additionally allows you to minimize the size of the antennas of such a broadband channel and simplify the operation of these satellite systems.

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