Design and Comparative Study Among Antennas of GCS for Telemetry Communication System of UAV

Recently, Unmanned Aerial Vehicle (UAV) becomes a popular and interesting technology for researchers and academics because it has high potential to be implemented in various fields. The UAV operation is managed by a Ground Control Station (GCS) on which requires a communication system to send control signals and acquire data collected by sensors on UAV. The longer the UAV's flying distance needs a higher transmission power budget that can be achieved by increasing transmitter power, increasing receiver sensitivity, or increasing antenna gain. However, the design of communications systems on a flying platform is limited by the following constraints. The transmitter, receiver, and antenna must be compact, lightweight, and energy-efficient to save battery on the vehicle. Although the antenna does not directly influence the energy consumption from the battery, an increase in antenna gain usually requires an increase of the antenna dimension that causes higher weight and or reduces the aerodynamics. Therefore, the most efficient way to increase the link budget is by modifying the antenna on the GCS. This paper describes the analysis of antennas commonly used in GCSs for UAV communication links, namely the Yagi-Uda, bi-quad, and double bi-quad antennas. The antenna is designed to work at a frequency of 433.5 MHz following the transceiver device used. The antenna designs are numerically simulated then fabricated for evaluating their performance. The testing is done on the following issues, i.e. the antenna's basic parameters measurement, the ground-to-ground transmission test, and the ground to air transmission test. The test results show that the double bi-quad gives better performance than the other two other testing antennas.

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ANALISIS KINERJA SISTEM KOMUNIKASI SERAT OPTIK DENGAN MENGGUNAKAN METODE POWER LINK BUDGET DAN RISE TIME BUDGET PADA PT.TELKOM ( Studi Kasus Link Batusangkar – Lintau )

Voteteknika (Vocational Teknik Elektronika dan Informatika) ◽

10.24036/voteteknika.v2i2.4079 ◽

2018 ◽

Vol 2 (2) ◽

Author(s):

Okses Efriyanda ◽

Delsina Faiza ◽

Ahmaddul Hadi

Keyword(s):

Optical Fiber ◽

Communication System ◽

Rise Time ◽

Time Budget ◽

Optical Power ◽

Optical Fiber Communication ◽

Power Budget ◽

Power Meter ◽

Budget Analysis ◽

Link Budget

This study aims to analyze the performance of a fiber optic communication system to link Batusanggkar – Lintau PT.Telkom. The tools used are the OTDR and optical power meter. Type of optical fiber used is an optical fiber with G.655. Core optical fiber studied as much as 8 cores. The average attenuation of each core generated based on the OTDR is 0.22139 dB/km, while the average attenuation measurements of each core based power meter that is 0.236075 dB/km. Average attenuation OTDR and power meter still below the values calculated in reference to the ITU-T standard is 0.285448 dB/km. Results of power link budget calculations on each core with a cable length of 34,665 km with total average attenuation of each core 9.84019 dB and output power received is -8.51019 dBm receiver, then the value of the link power budget calculations compared with Rx transmitting device sensitivity (-27 dBm = 0.002 mW), where the value of the calculation is smaller than the Rx sensitivity. It can be concluded that the performance of an optical fiber communication system to link Batusanggkar - Lintau which has worked well and normal. While the rise time budget analysis results indicate that the value of the overall system rise time exceeds the maximum standard of 35% RZ bit period of 10 Gbps bit rate is 35 ps (53,689 ps> 35 ps). Keywords: OTDR, Power Meter, Core, Link Power Budget, Rise Time Budget

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Fault Tree Analysis for a Modern Communication System

Pakistan Journal of Engineering Technology & Science ◽

10.22555/pjets.v7i1.2087 ◽

2017 ◽

Vol 7 (1) ◽

Author(s):

Kamal Hamid ◽

Nadim Chahine

Keyword(s):

Communication System ◽

Communication Systems ◽

Fault Tree ◽

Fault Tree Analysis ◽

Theory And Practice ◽

Tree Analysis ◽

Satisfactory Performance ◽

System Components ◽

Link Budget ◽

Simulation Results

Wireless communications became one of the most widespread means for transferring information. Speed and reliability in transferring the piece of information are considered one of the most important requirements in communication systems in general. Moreover, Quality and reliability in any system are considered the most important criterion of the efficiency of this system in doing the task it is designed to do and its ability for satisfactory performance for a certain period of time, Therefore, we need fault tree analysis in these systems in order to determine how to detect an error or defect when happening in communication system and what are the possibilities that make this error happens. This research deals with studying TETRA system components, studying the physical layer in theory and practice, as well as studying fault tree analysis in this system, and later benefit from this study in proposing improvements to the structure of the system, which led to improve gain in Link Budget. A simulation and test have been done using MATLAB, where simulation results have shown that the built fault tree is able to detect the system’s work by 82.4%.

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Comparative analysis of SISO and wavelength diversity-based FSO systems at different transmitter power levels

Journal of Optical Communications ◽

10.1515/joc-2020-0119 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Varun Srivastava ◽

Abhilash Mandloi ◽

Dhiraj Kumar Patel

Keyword(s):

Optical Signal ◽

Free Space Optical ◽

Optical Source ◽

Transmit Power ◽

Single Input Single Output ◽

Transmitter Power ◽

Single Output ◽

Communication Links ◽

Single Input ◽

Matching Performance

AbstractFree space optical (FSO) communication refers to a line of sight technology, which comprises optical source and detector to create a link without the use of physical connections. Similar to other wireless communication links, these are severely affected by losses that emerged due to atmospheric turbulence and lead to deteriorated intensity of the optical signal at the receiver. This impairment can be compensated easily by enhancing the transmitter power. However, increasing the transmitter power has some limitations as per radiation regulations. The requirement of high transmit power can be reduced by employing diversity methods. This paper presents, a wavelength-based diversity method with equal gain combining receiver, an effective technique to provide matching performance to single input single output at a comparatively low transmit power.

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Development of Appropriate Power Distribution Design for Can-Sized satellite (canSAT)

Journal of Advanced Industrial Technology and Application ◽

10.30880/jaita.2021.02.02.001 ◽

2021 ◽

Vol 02 (02) ◽

Author(s):

Devina Cristine Marubin ◽

◽

Sim Sy Yi ◽

Keyword(s):

Power System ◽

Data Acquisition ◽

Power Supply ◽

Communication System ◽

Power Distribution ◽

Low Cost ◽

Small Satellite ◽

Power Budget ◽

Space Agency ◽

Rules Set

Can-Sized satellite (canSAT) is a small satellite that is used for educational purpose. CanSAT offer student to build their satellites with their creativity which make the learning process more effective. In Malaysia, SiswaSAT is held by the Malaysia Space Agency for students in different categories to participate and build their satellites according to rules set and it should be a low-cost project. CanSAT can be divided into few parts which are communication system, onboard data acquisition, ground control station and power system. The power system is one of the important and heaviest subsystems, it needed to supply power, but weight and size are one of the main concerned as the canSAT should not exceed the required weight and selecting power supply that is matched with the overall power budget that has small size and lightweight is challenging. Therefore, the power supply selection should consider this detail. The power distribution design should be able to supply an appropriate amount of current and voltage to the components according to their specification. This study aims to develop and test the proposed prototype which is named ScoreSAT able to provide data and have enough power supply for the whole operation. Therefore, an initiative to develop the appropriate power distribution design for canSAT is taken to overcome the problem of the power system. Moreover, each subsystem needs to be tested by obtaining the results from the onboard data acquisition and transmit the data using the communication system before integrating into the power system. ScoreSAT prototype needs to carry the system that is mounted inside, thus the space inside the prototype needs to be fully utilized for the whole system to fit in. ScoreSAT completes the mission by obtaining data acquisition during the operation.

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Visible Light Communication System Design and Link Budget Analysis

Journal of Lightwave Technology ◽

10.1109/jlt.2015.2499204 ◽

2015 ◽

Vol 33 (24) ◽

pp. 5201-5209 ◽

Cited By ~ 15

Author(s):

Babar Hussain ◽

Xianbo Li ◽

Fengyu Che ◽

C. Patrick Yue ◽

Liang Wu

Keyword(s):

Visible Light ◽

System Design ◽

Communication System ◽

Visible Light Communication ◽

Budget Analysis ◽

Link Budget ◽

Communication System Design

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Link Budget Analysis for Reconfigurable Smart Surfaces in Aerial Platforms

10.36227/techrxiv.12885044 ◽

2020 ◽

Author(s):

SAFWAN ALFATTANI ◽

Wael Jaafar ◽

Yassine Hmamouche ◽

Halim Yanikomeroglu ◽

Abbas Yongacoglu

Keyword(s):

Communication Systems ◽

Low Earth Orbit ◽

Earth Orbit ◽

Budget Analysis ◽

Smart Surfaces ◽

Aerial Vehicle ◽

Link Budget ◽

Aerial Platforms ◽

High Altitude Platform Station ◽

Aerial Platform

In this paper, we derive the link budget relations for communications assisted by reconfigurable smart surfaces (RSS). Specifically, under specular and scattering paradigms, we provide link budget expressions for an RSS-assisted communication on the ground, where the RSS is either mounted on a building, or on an aerial platform, such as an unmanned aerial vehicle (UAV), a high altitude platform station (HAPS), or a low-earth orbit satellite (LEO). The obtained numerical results provide design guidelines for RSS-assisted communication systems, including the recommended aerial platform to use, the size of RSS for each type of the platforms, and the operating frequencies.

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VARIATION OF METEOR ECHO RATES WITH RADAR SYSTEM PARAMETERS

Canadian Journal of Physics ◽

10.1139/p51-044 ◽

1951 ◽

Vol 29 (5) ◽

pp. 403-426 ◽

Cited By ~ 14

Author(s):

D. W. R. McKinley

Keyword(s):

Radio Wave ◽

Wave Length ◽

Radar System ◽

Antenna Gain ◽

Scattering Pattern ◽

Magnitude Distribution ◽

System Parameters ◽

Transmitter Power ◽

Meteor Trail ◽

Strong Filter

Observations made with crossed-polarization radar system systems do not support the suggestion that the ionized meteor trail may act as a strong filter–polarizer of the incident radio wave. Experiments have been carried out to determine the variation of normal meteor echo rates with transmitter power, antenna gain, and radio wave length, and all confirm Lovell's scattering formula, provided that account is taken of the effective broadening of the scattering pattern of the meteor trail with increasing wave length. The limiting sensitivity of the 9.22 m. 200 kw. radar is determined to be about 9th magnitude. During a strong visual shower the observed increase in visual rates and low-power radar rates, compared to high-power radar rates, is explained by assuming that the magnitude distribution of the shower meteors differs from the normal nonshower distribution.

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