scholarly journals Modeling and Fabrication of a Reconfigurable RF Output Stage for Nanosatellite Communication Subsystems

Electronics ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 149
Author(s):  
Jose L. Alvarez-Flores ◽  
Jorge Flores-Troncoso ◽  
Leonel Soriano-Equigua ◽  
Jorge Simón ◽  
Joel A. Castillo ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Electromagnetic Interference ◽  
Software Defined Radio ◽  
Satellite Communication ◽  
Small Satellite ◽  
Output Stage ◽  
Communication Subsystems ◽  
Baseband Processor ◽  
Processing Control ◽  
Space Segment

Current small satellite platforms such as CubeSats require robust and versatile communication subsystems that allow the reconfiguration of the critical operating parameters such as carrier frequency, transmission power, bandwidth, or filter roll-off factor. A reconfigurable Analog Back-End for the space segment of a satellite communication subsystem is presented in this work. This prototype is implemented on a 9.5 cm2 6-layer PCB, and it operates from 0.070 to 6 GHz and complies with CubeSat and IPC-2221 standards. The processing, control, and synchronizing stages are carried out on a Software-Defined Radio approach executed on a baseband processor. Results showed that the signal power at the output of the proposed Analog Back-End is suitable for feeding the following antenna subsystem. Furthermore, the emitted radiation levels by the transmission lines do not generate electromagnetic interference.

scholarly journals A Reconfigurable Analog Back-End for CubeSat Communications

2020 ◽  
Author(s):  
José L. Alvarez-Flores ◽  
Jorge Flores-Troncoso ◽  
Remberto Sandoval-Arechiga ◽  
Joel A. Castillo ◽  
Jorge Simon ◽  
...  
Keyword(s):  
Carrier Frequency ◽  
Software Defined Radio ◽  
Signal Power ◽  
Transmission Power ◽  
Small Satellite ◽  
Operation Parameters ◽  
Communication Subsystems ◽  
Baseband Processor

Abstract Current small satellite platforms such as CubeSats, require robust and versatile communication subsystems that allow the reconfiguration of the critical operation parameters such as carrier frequency, transmission power, bandwidth, or filter roll-off factor. In this paper, a reconfigurable Analog Back-End for CubeSat communications is proposed. This prototype is implemented using CAD software, on a 6-layer PCB of 10 cm^2 to implement a transceiver that operates from 0.070 to 6 GHz and complying with CubeSat and IPC-2221 standards. An Software-Defined Radio approach implemented on a baseband processor is used for control purposes. Measurements showed that the signal power at the output of the proposed analog back-end is suitable to feed the subsequent antenna subsystem.

Study of Blind Source Separation on Transmission Line EMI

2013 ◽  
Vol 846-847 ◽  
pp. 493-499
Author(s):  
Zi Hua Li ◽  
Chun Yan Xiao ◽  
Shuai Gao
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Spectral Characteristics ◽  
Separation Performance ◽  
Fast Independent Component Analysis ◽  
Fastica Algorithm ◽  
Interference Signals ◽  
Emc Design

The transmission line is an important part of electrical system. Electromagnetic interference (EMI) signals can be picked up by transmission lines in a way of conduction or radiation, and interfere the sensitive devices located in the power source end and the load end, so it is important and necessary to separate and identify the EMI source signals coupling to the transmission lines in order to guide the electromagnetic compatibility (EMC) design and the further EMI diagnosis and suppression. Fast independent component analysis (FastICA) algorithm is studied and programmed, and its feasibility and separation performance are validated via simulation of BSS of three mixed signals and the average signals to interference ratio (SIR) is approximately 30 dB. The model of crosstalk of transmission lines is built and simulated, the interference signals are separated by the FastICA algorithm, and the average SIR is over 20 dB. Periodicity and spectral characteristics of the separated interference signals are analyzed, and the identification of interference signals is realized.

A Coarse-Grained Array based Baseband Processor for 100Mbps+ Software Defined Radio

2008 ◽  
Author(s):  
Bruno Bougard ◽  
Bjorn De Sutter ◽  
Sebastien Rabou ◽  
David Novo ◽  
Osman Allam ◽  
...  
Keyword(s):  
Software Defined Radio ◽  
Coarse Grained ◽  
Baseband Processor

scholarly journals Model of forming a spatial-temporary radio frequency portrait of subscriber terminals in satellite communication systems monitoring

2020 ◽  
Vol 100 (4) ◽  
pp. 78-86
Author(s):  
M. Baldychev ◽  
◽  
A. Bosyy ◽  
O. Galtseva ◽  
Keyword(s):  
Radio Frequency ◽  
Software Defined Radio ◽  
Communication Systems ◽  
Satellite Communication ◽  
A Priori ◽  
Complex Structure ◽  
Satellite Communications ◽  
Physical Parameters ◽  
Time Frequency ◽  
Spatio Temporal

Currently, the development of satellite communications systems (SCS) is associated with the development of signals of complex structure. The popularization and distribution of software-defined radio systems (Software-defined radio, SDR) are noted, which leads to a decrease of quality of functioning of the SCS. Promising areas of countering the unauthorized use of the time-frequency resource of the KA repeater are methods aimed at determining the location of subscriber terminals (ST) and analyzing the service and semantic parts of the transmitted message. Accounting for changes of physical parameters requires the use of a large amount of heterogeneous a priori data; it is not achievable task in practice. According to the theory of mathematical statistics, the approximation is used at solving problems of sample analysis. The result of the approximation is a spatio-temporal radio-frequency portrait (STRFP) of an ST participating in the formation of a group signal. Thus, the aim of the research is to develop a model of changing the physical parameters of a radio signal and to study the possibility of approximating physical parameters in order to form a spatio-temporal radiofrequency portrait of an ST SCS.

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