Design optimization of a novel inter-satellite downlink for small satellites to (mega-)constellations

Low downlink data rates limit the scientific and commercial return from small satellites. Now with constellations of small satellites becoming popular, the amount of data generated in low Earth orbit will be greater than ever. A novel data downlink architecture for small satellites is investigated that uses non-geostationary orbit (mega-...

Terahertz Torching: Towards closed-loop neurostimulation of group-housed freely moving rodents

Close collaboration between the Bioelectronics department at Delft University of Technology and the Neuroscience department at the Erasmus Medical Centre has resulted in a successful tethered design for a real-time epileptic seizure detection and suppression method for mice. The goal of the Neuromate project is to develop this method into a...

High Efficiency Transmitter Architecture for Nano-satellites

The fast growing interest in nano-satellite development and the use of nano-satellite for complex missions has led to an increase in the downlink data-rate. The availability of free bands (amateur frequency bands: VHF and UHF) is getting limited and more challenging to do the frequency coordination. This can be attributed to the surge in number...

Space-Time Chip Equalization for Maximum Diversity Space-Time Block Coded DS-CDMA Downlink Transmission

In the downlink of DS-CDMA, frequency-selectivity destroys the orthogonality of the user signals and introduces multiuser interference (MUI). Space-time chip equalization is an efficient tool to restore the orthogonality of the user signals and suppress the MUI. Furthermore, multiple-input multiple-output (MIMO) communication techniques can...

IRAS end-to-end datasystem

The development of a complex data system involving many disciplines requires a strict control from the early phases of a project onwards, to ensure that all requirements are met within the technical and financial constraints. To exercise such control becomes more difficult when different institutes/organizations contribute to the system, the...