Development of an Opensource, Openhardware, Software-Defined Radio Platform for Two-Way Satellite Time and Frequency Transfer

We describe an opensource, openhardware experimental Software-Defined Radio setup for prototyping various digital communication over microwave links with a geostationary satellite for assessing the impact of the various parameters on a Two-Way Satellite Time and Frequency Transfer link. Results consistent with the proprietary SATRE modem are demonstrated, including sub-ns resolution on ranging and two-way measurements. The emitted signal structure and impact of code length are assessed, and the signal acquisition and processing are described.