Same here as in the other post: I knew I forgot an important ToDo on my list, which is announcing MarconISSta here. If anybody has any questions on the sytem, let me know. We plan to do some experiments where other ground station operators will be included to measure their signal strength from space. I will announce it in the new satellite category!
On the cubesat topic: At TU Berlin we took the LimeSDR as a baseline and modified it for use in space. Instead of the USB interface, we have an SPI interface. Among other things, we included some memory for data storage, power monitoring sysstems and a small microcontroller. At this stage, the system will be only used for spectrum analysis, so only RX is used. It is planned to be launched on a satellite in 2020!
Project webpage: https://www.raumfahrttechnik.tu-berlin.de/menue/forschung/abgeschlossene_projekte/salsa/parameter/en/