LibreCellular Update 8: srsRAN Fork Updated and new RFE

The srsRAN 4G fork with native LimeSDR hardware support has received a long overdue update, and a new RF front-end has been developed which provides a highly convenient solution for those building base stations, both of the small cell and wider coverage type.

LibreCellular Update 4: CI Phase 1 Commissioning

We are pleased to report that the next milestone has been reached, whereby the srsRAN software is automatically built and deployed to a base station, together with eNodeB and EPC configuration, following which an end-to-end test is completed when a modem attaches to the network and a successful ping completes.

LibreCellular Update 3: Band 3 Medium Power Amplifier

Initial version of a low cost 1800MHz power amplifier design completed and tested. In parallel to building out the CI hardware platform we’ve been working on the design for a low cost medium power amplifier for LTE Band 3. While suitable low power RF amplifiers are available at a modest…

LibreCellular Project Update

Since the project was announced last year we’ve suffered a number of setbacks due to circumstances outside of our control. For example, the company we planned to use for customised rack mount enclosures exited the market due to pandemic related issues. However, we are pleased to report that we are now making good progress and a long overdue update follows.

OTA: QO-100 FreeDV Transmissions, Lime-Powered 5G Testbeds, O-RAN Code, and More

Lime Microsystems has published an interview with Gerhard Burian, David Rowe, and Steve Sampson on using FreeDV Mode 2020 for transmitting digital voice via the Es’Hail-2 satellite’s amateur radio transponder (QO-100) using just 1,600 Hz of radio frequency bandwidth. “The bandwidth regulation on the [QO-100] narrow band transponder, being 2,700…

OTA: Lower-Cost LimeRFE, WSPR Experiments, LoRaWAN World Records, and More

The LimeRFE crowdfunding campaign has a new, lower-cost option: the same programmable software-defined front-end board but without the components needed to operate in cellular bands, as an alternative for radio amateurs. “We’ve had some enquiries as to whether it would be possible to make a reduced cost version of LimeRFE…
LimeRFE, in hand