scholarly journals Performance Analysis of Navigation Signal Based on FH-BOC Modulation System

2021 ◽  
Vol 2136 (1) ◽  
pp. 012042
Author(s):  
Minshu Zhang ◽  
Lixin Zhang ◽  
Qibing Xu ◽  
Lang Bian
Keyword(s):  
Performance Analysis ◽  
Navigation System ◽  
Navigation Systems ◽  
Signal System ◽  
Code Tracking ◽  
Advantages And Disadvantages ◽  
System A ◽  
Navigation Signal ◽  
Scientific Significance ◽  
Satellite Navigation Systems

Abstract Based on the traditional BOC modulation system, a new navigation signal system based on FH-BOC is proposed in this paper. The simulation and verification of FH-BOC signal are carried out, and the modulation characteristics, code tracking performance and anti-interference performance of FH-BOC signal are analyzed, and the advantages and disadvantages of the modified system are verified. The results show that FH-BOC signal has good ranging and anti-interference ability, which is suitable for navigation system and can reduce the ambiguity of BOC signal’s secondary peak to a certain extent. At the same time, the T has important scientific significance and application value to improve the countermeasure capability of other satellite navigation systems.

REVIEW OF SATELLITE-FREE NAVIGATION SYSTEMS

2018 ◽  
pp. 20-24
Author(s):  
M. K. Savkin ◽  
A. R. Filatov
Keyword(s):  
Satellite Navigation ◽  
Navigation Systems ◽  
Military Operations ◽  
Advantages And Disadvantages ◽  
Working Principle ◽  
Satellite Signal ◽  
Satellite Navigation Systems ◽  
Insufficient Number

Nowadays majority of navigation methods, used in unmanned flying vehicles, are based on satellite navigation systems, such as GPS or GLONASS, or are amplified with them. But hardware, that uses such systems, can’t work in difficult conditions, for example causes by relief: with insufficient number of satellites or at low satellite signal. Satellite navigation systems are vulnerable for methods of radio defense: satellite signal can be deadened or replaced. That is why such systems usage is unacceptable while critical missions during military operations, emergency or reconnaissance. The article briefly describes components used for building alternative satellite-free navigation systems for flying vehicles. For each component its purpose and brief description of working principle are given, advantages and disadvantages are considered.

scholarly journals Application of microwave motion sensors in navigation systems for ground vehicle

2019 ◽  
Vol 30 ◽  
pp. 12004 ◽  
Author(s):  
Dmitrii Khablov
Keyword(s):  
Navigation System ◽  
Autonomous Navigation ◽  
Velocity Vector ◽  
Continuous Measurement ◽  
Navigation Systems ◽  
Motion Sensors ◽  
Ground Vehicle ◽  
Cumulative Error ◽  
System A ◽  
Transport Management

Effective land transport management in a controlled and unmanned mode is impossible without its accurate and continuous positioning. The paper discusses the possibility of increasing this accuracy in the absence or uncertain reception of signals from satellites of the global navigation system. Moreover, the use of an additional self-navigation inertial system to solve this problem in this case is not justified for reasons of accuracy and cost. Therefore, as an alternative autonomous navigation system, a solution based on radar Doppler sensors of modular type is proposed. The methods of measuring the velocity vector and the algorithm of direct continuous measurement of displacements are considered. It is shown that the latter measurement option can significantly reduce the cumulative error when positioning vehicles.

Increasing the Resistance of GPS Receivers by Using a Fuzzy Smart Estimator in Weak Signal Conditions

2020 ◽  
Vol 73 (5) ◽  
pp. 991-1013
Author(s):  
M. A. Farhad ◽  
M. R. Mosavi ◽  
A. A. Abedi ◽  
K. Mohammadi
Keyword(s):  
Kalman Filter ◽  
Simulated Data ◽  
Real Data ◽  
Navigation Systems ◽  
Weak Signal ◽  
Signal Tracking ◽  
Advantages And Disadvantages ◽  
Vector Tracking ◽  
Gnss Receivers ◽  
Satellite Navigation Systems

Global satellite navigation systems (GNSS) are nowadays used in many applications. GNSS receivers experience limitations in receiving weak signals in a degraded environment. Hence, tracking weak GNSS signals is a topic of interest to researchers in this field. Different methods have been proposed to address this issue, each of which has advantages and disadvantages. In this paper, a method based on the vector tracking method is proposed for weak signal tracking. This method has been developed based on a strong Kalman filter instead of the extended Kalman filter used in conventional vector tracking methods. In order to adjust important parameters of this filter, the fuzzy method is used. The results of tests performed with both simulated data and real data demonstrate that the proposed method performs better than previous ones in weak signal tracking.

SATELLITE NAVIGATION SYSTEM MARKETING

2017 ◽  
pp. 76-83
Author(s):  
Ірина Борисівна Чичкало-Кондрацька ◽  
Вікторія Вікторівна Добрянська ◽  
Володимир Тарасович Мірошниченко
Keyword(s):  
Navigation System ◽  
Swot Analysis ◽  
Satellite Navigation ◽  
Associate Professor ◽  
Global Market ◽  
Navigation Systems ◽  
Launch Vehicles ◽  
Senior Lecturer ◽  
Satellite Navigation System ◽  
Satellite Navigation Systems

UDC 69.003:658.8  Chychkalo-Kondratska, D.Sc. (Economics),Professor.      V. Dobryanskaya,       PhD       (Technical),Associate Professor. V. Miroshnichenko, Senior Lecturer. Poltava National Technical Yurii Kondratyuk University. Satellite navigation system marketing. Satellite navigation system was developed as a defense project, but in recent decades, has formed a global market of users of satellite navigation systems, and manufacturers of navigational equipment. The article is devoted to analysis of market prospects by the European satellite navigation system Galileo. Conducted SWOT-analysis, allowed to conclude that the project «Galileo» has advantages and problems. The main problem is the complexity of creating a satellite constellation, because Europe does not have its own reliable and cheap launch vehicles. The solution may be the inclusion in the draft of Ukraine, who has processed technology of rocketry.   Keywords: marketing, the global market, investment project, satellite navigation systems, launch vehicles, SWOT-analysis, marketing of the project.

Mathematical Modelling of Indian Regional Navigation Satellite System Receiver

2017 ◽  
Vol 67 (4) ◽  
pp. 443 ◽  
Author(s):  
S. Naveen Pitchumani ◽  
S. Arun Sundar ◽  
T. Srinivasan ◽  
S. Savithri
Keyword(s):  
Navigation System ◽  
Satellite System ◽  
Signal Acquisition ◽  
Navigation Satellite ◽  
Navigation Systems ◽  
Code Tracking ◽  
Delay Locked Loop ◽  
Gps Navigation ◽  
Interface Control ◽  
Global Positioning

<p class="p1">At present the armoured fighting vehicles are equipped with either global positioning system (GPS) receivers or integrated inertial navigation system (INS)/GPS navigation systems. During hostile situations, the denial/degradation of the GPS satellite signals may happen. This results in the requirement of an indigenous satellite based navigation system. Indian Space Research Organisation has developed an indigenous Indian regional navigation satellite system (IRNSS), with a seven satellite constellation to provide independent position, navigation and timing services over India and its neighbouring regions. In this paper, the development of IRNSS receiver using MATLAB as per IRNSS signal in space interface control document for standard positioning service is discussed. A method for faster IRNSS signal acquisition in frequency domain and delay locked loop code tracking for the acquired satellite signals are used. Models for navigation message decoding and pseudo range/user position calculations are developed using the algorithms provided in IRNSS ICD.</p>

A World-wide Navigation System for Shipping

1984 ◽  
Vol 37 (3) ◽  
pp. 339-347
Author(s):  
J. N. F. Lameijer
Keyword(s):  
Navigation System ◽  
World Wide ◽  
Satellite Navigation ◽  
Second World War ◽  
Navigation Systems ◽  
World War ◽  
Merchant Shipping ◽  
Satellite Navigation Systems ◽  
Second World

Since the end of the second world war hyperbolic position-fixing systems have been available for use by merchant vessels. These systems originated in military requirements. Today for the navigation of merchant ships a number of existing systems can be used, such as Decca, Loran C, Omega, Transit and Cikada, the two latter being satellite navigation systems. Transit became operational in 1964 for military use and in 1967 the system was made available for use by merchant shipping.

A Review of Multisensor Fusion Methodologies for Aircraft Navigation Systems

2005 ◽  
Vol 58 (3) ◽  
pp. 405-417 ◽  
Author(s):  
David J. Allerton ◽  
Huamin Jia
Keyword(s):  
Kalman Filter ◽  
Data Fusion ◽  
Navigation System ◽  
Review Paper ◽  
Fault Tolerant ◽  
Navigation Systems ◽  
System Architectures ◽  
Advantages And Disadvantages ◽  
Aircraft Navigation ◽  
Fusion Methods

This paper reviews currently existing fault-tolerant navigation system architectures and data fusion methods used in the design and development of integrated aircraft navigation systems and also compares their advantages and disadvantages. Four fault-tolerant navigation system architectures are reviewed and the associated Kalman filter architectures and algorithms are discussed. These techniques have been used in most integrated aircraft navigation systems. The aim of this review paper is to provide a guide for navigation system designers to develop future aircraft multisensor navigation systems.

scholarly journals Optimization of an aircraft flight trajectory in the GLONASS dynamic accuracy field

2018 ◽  
Vol 21 (5) ◽  
pp. 56-66 ◽  
Author(s):  
O. N. Skrypnik ◽  
N. G. Arefyeva ◽  
R. O. Arefyev
Keyword(s):  
Navigation System ◽  
Orbital Motion ◽  
Satellite Navigation ◽  
Geometric Factor ◽  
Route Optimization ◽  
Navigation Systems ◽  
Satellite Navigation System ◽  
Aircraft Flight ◽  
Dynamic Accuracy ◽  
Satellite Navigation Systems

Advanced technologies in air traffic management assume the transition to flexible routing based on the use of the satellite navigation systems. However, the accuracy of these systems depends on the location of the navigation satellites in relation to the target object and will vary in the available airspace. Therefore, the designed optimal flight path of the aircraft should be built taking into account the accuracy of its keeping in the variable navigation-time field (accuracy field) of the satellite navigation system. The accuracy field of the satellite navigation systems can be characterized by the geometric factor (spatial, horizontal and vertical). The geometric factor of the satellite navigation system is determined by the relative position of the consumer and the satellites upon which the navigation problem is solved, and is a deterministic value. Due to the orbital motion of satellites and the movement of the consumer, the geometric factor will change in space and time. Knowing the laws of the satellites orbital motion it is possible to calculate the geometric factor for any point in the air space and for any moment of time according to the known almanac of the system. This allows predicting the expected accuracy of the navigation and time determination during the flight on a particular air route. Optimization methods based on the algorithms of A-star and Dijkstra graph theory are chosen for aircraft flight trajectories construction. Mathematical modeling is used for the optimal trajectory construction in the GLONASS dynamic accuracy fields with their various structures in static and dynamic problem setting.

scholarly journals ON RAIN INFORMATION AS MAP FEATURES FOR CAR NAVIGATION SYSTEMS

2021 ◽  
Vol VIII-4/W1-2021 ◽  
pp. 49-56
Author(s):  
M. Gebert ◽  
T. Berroth ◽  
J.-E. Navarro-Barrientos
Keyword(s):  
Embedded Systems ◽  
Navigation System ◽  
Input Data ◽  
Relevant Information ◽  
Data Sources ◽  
Low Latency ◽  
Navigation Systems ◽  
Advantages And Disadvantages ◽  
Car Navigation System ◽  
Car Navigation

Abstract. In this paper we present a design concept, architecture and implementation of a microservice to process and integrate rain information into a car navigation system in the form of rain map features. Two different input data sources are considered: QuadTile JSON format and GeoTIFF images. Our system converts this input data into an ouput GeoJSON format with only the most relevant information for the map overlay system in the navigation system of the car. We discuss different options for the cloud appearance, like color, shape and transparency. We present our microservices architecture together with data pipelines and implementation. Our approach allows for low latency and spare computing resources, which are especially needed in embedded systems. Finally, we discuss the advantages and disadvantages of our approach as well as further work.

scholarly journals Doppler shift satellite navigation - NAVSAT-TRANSIT and adherents

2013 ◽  
Vol 1 (2) ◽  
pp. 11
Author(s):  
Jakub Hospodka
Keyword(s):  
Doppler Shift ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Short Article ◽  
Advantages And Disadvantages ◽  
Shift Effect ◽  
Satellite Navigation Systems

Short article dissertates about Satellite navigation systems based on Doppler shift. Discussed are advantages and disadvantages of such systems especially in connection with aviation. In last part are mentioned nowadays satellite navigation systems based on Doppler shift effect.

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