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Karunanithi, Visweswaran (author), Verhoeven, C.J.M. (author), Silveira Vaucher, C. (author)As the complexity of nanosatellite missions have increased over time, the data generated on-board nanosatellites have increased multiple folds. As a result, there is a need to downlink large amounts of data. Multiple nanosatellite missions have started using spectral efficient modulation schemes recommended in DVB.S2 and DVB.S2X to make the best...conference paper 2022
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Karunanithi, Visweswaran (author), Rajan, R.T. (author), Sundaramoorthy, P.P. (author), Verma, Maneesh (author), Verhoeven, C.J.M. (author), Bentum, M (author), McCune, E.W. (author)The inter-satellite link (ISL) in swarm and constellation missions is a key enabler in the autonomy of the mission. OLFAR (Orbiting Low Frequency Array for Radio astronomy) is one such mission where 10 to 50+ nanosatellites are placed in the Lunar orbit and perform astronomical observations from the far-side of the moon. Each of the...conference paper 2019
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Rajan, R.T. (author), Sundaramoorthy, P.P. (author), Vertegaal, C.J.C. (author), Montagne, A.J.M. (author), Karunanithi, Visweswaran (author), Verma, Maneesh (author), Bentum, M (author), Verhoeven, C.J.M. (author)The frequency range below 30 MHz remains one of the last unexplored frequency ranges in radio astronomy However, Earth-based observations at these wavelengths are severely impeded, due to man-made radio frequency interference (RFI) and atmospheric opacity. To overcome this impediment, various space-based radio astronomy studies have been...conference paper 2019
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Speretta, S. (author), Uludag, M.S. (author), Karunanithi, Visweswaran (author), Radu, S. (author), Chronas Foteinakis, N. (author), Bouwmeester, J. (author), Menicucci, A. (author), Gill, E.K.A. (author)This paper presents the design of a multi-frequency deployable antenna system for femto-satellites as part of the Delfi-PQ project, a PocketQube with a size of 50x50x178 mm which is being developed by the Delft University of Technology. This new form factor brings its own challenges on every subsystem and it is seen as a stepping stone towards...conference paper 2019
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Speretta, S. (author), Oei, Hong Yang (author), Verhoeven, C.J.M. (author), Dirkx, D. (author), Karunanithi, Visweswaran (author), Bentum, Mark (author), Miraglia, Antonio (author), Rotteveel, Jeroen (author), Alvarez, Marco (author)This paper presents a software-defined testbed to perform hardware-in-The-loop test of miniaturized coherent transponders. Such a setup has been designed to minimize the access threshold for future users, heavily relying on available open source applications and commercial hardware, targeting future coherent transponders for interplanetary...conference paper 2019
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van 't Hof, Jos (author), Karunanithi, Visweswaran (author), Speretta, S. (author), Verhoeven, C.J.M. (author), McCune, E.W. (author)Nano-satellite IoT/M2M missions are gaining popularity in recent time. Various companies have launched their pilot missions last year in 2018 and all these companies intend to place a constellation in (V)LEO that can communicate with low power sensors on the ground (sometimes remote locations) and relay it back to the end-user who is monitoring...conference paper 2019