Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Robert van Zyl"'
Publikováno v:
Nonlinear Engineering. 11:615-619
The Internet of Things concept can be implemented using Long-range wireless access network protocol. The work in this article is done to implement LoRa terrestrial network which will be connected to a satellite in future. The work mainly studies the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e88688ee63328f31a3bd9fb8b5a39dcb
https://doi.org/10.1515/nleng-2022-0236
https://doi.org/10.1515/nleng-2022-0236
Publikováno v:
Journal of Engineering, Design and Technology. 19:1648-1659
Purpose The purpose of this paper is to design, build and test a low power high frequency (HF) transmitter that can be received by the Super Dual Auroral Radar Network (SuperDARN) radar installed at SANAE IV, the 4th South African National Antarctic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9436ef56999a507bca918056cd2e1532
https://doi.org/10.1108/jedt-02-2020-0057
https://doi.org/10.1108/jedt-02-2020-0057
Autor:
Robert van Zyl, Gunjan Gupta
Publikováno v:
Second International Conference on Sustainable Technologies for Computational Intelligence ISBN: 9789811646409
Second International Conference on Sustainable Technologies for Computational Intelligence
Second International Conference on Sustainable Technologies for Computational Intelligence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bef5868905907a47a0051af6dc4b301d
https://doi.org/10.1007/978-981-16-4641-6_6
https://doi.org/10.1007/978-981-16-4641-6_6
Autor:
Robert van Zyl, Gunjan Gupta
Publikováno v:
Expert Clouds and Applications ISBN: 9789811621253
Non-orthogonal multiple access (NOMA) is used in the uplink for LPWAN for providing services to users or nodes requiring a different set of services. The LoRa nodes usually suffer from inter-cluster and intra-cluster interference. In this article, bo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1558c27fc54c0f51ebad0a8d8533fb9b
https://doi.org/10.1007/978-981-16-2126-0_42
https://doi.org/10.1007/978-981-16-2126-0_42
Autor:
Robert van Zyl, Gunjan Gupta
Publikováno v:
International Journal on Smart Sensing and Intelligent Systems, Vol 14, Iss 1 (2021)
LoRa technology is derived from chirp spread spectrum (CSS) having embedded forward error correction (FEC). A wide band is used for transmissions to counter interference and to handle frequency offsets. The paper investigates low power wide area netw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::008892c0010eb16ee714af8cafd590f6
https://www.exeley.com/exeley/journals/in_jour_smart_sensing_and_intelligent_systems/14/1/pdf/10.21307_ijssis-2021-002.pdf
https://www.exeley.com/exeley/journals/in_jour_smart_sensing_and_intelligent_systems/14/1/pdf/10.21307_ijssis-2021-002.pdf
Publikováno v:
Advances in Space Research. 62:3405-3422
An S-band radio designed with commercial-grade components for the nanosatellites is functionally and thermally characterized for quiet transmission. The QPSK modulation impairments are minor over −20 °C to +50 °C at 24, 26, 28 and 30 dBm RF level
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6096ccae11796d17c58daca0a2e115c
https://doi.org/10.1016/j.asr.2018.04.015
https://doi.org/10.1016/j.asr.2018.04.015
Publikováno v:
CEAS Space Journal. 10:453-467
Functional and thermal performance characteristics of a very high frequency/ultra high frequency (VHF/UHF) transceiver based on Gaussian minimum shift keying (GMSK) modulation are presented. The transceiver has been designed for CubeSats telemetry an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2f35d9dcb55d88819341281720b3107
https://doi.org/10.1007/s12567-018-0217-5
https://doi.org/10.1007/s12567-018-0217-5
Publikováno v:
SAIEE Africa Research Journal, Volume: 110, Issue: 1, Pages: 10-4, Published: MAR 2019
High voltage transmission line design requires careful insulator selection to ensure good operational performance. This paper reports on the in-situ measurements of leakage current (LC) on composite and glass insulators of the Cahora Bassa high volta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8afd65a830431be4c2b2f52123fcccd1
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1991-16962019000100001&lng=en&tlng=en
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1991-16962019000100001&lng=en&tlng=en
Autor:
Robert van Zyl, Matthew Sibanda
Publikováno v:
Journal of Engineering, Design and Technology. 14:770-780
Purpose Incorporating electromagnetic compatibility (EMC) in the design life of traditional satellites is entrenched in the satellite industry. However, EMC treatment of CubeSats has not been widely pursued, for various possible reasons. CubeSats are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::432744e44e661090f5859cd0d69cce1b
https://doi.org/10.1108/jedt-04-2014-0025
https://doi.org/10.1108/jedt-04-2014-0025
Publikováno v:
Journal of Engineering, Design and Technology. 14:641-651
Purpose In the Earth’s upper atmosphere, damage to satellite electronics is caused by exposure to extreme ultraviolet (EUV) radiation. One particular region where this type of radiation occurs is the South Atlantic Magnetic Anomaly region. As a res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ba16d75d93de51bc30346c7abc4cdb9
https://doi.org/10.1108/jedt-05-2014-0032
https://doi.org/10.1108/jedt-05-2014-0032