Results of a Software Defined Radio (SDR) Implementation of Two Way Satellite Time and Frequency Transfer (TWSTFT) Emitter and Receiver System
Year: 2024
Type: conference-paper
Abstract: Spectrum spreading of the carrier of an ultrastable clock using pseudo-random sequence generators implemented in a Field Programmable Gate Array (FPGA) is broadcast after bandpass filtering as a Binary Phase Shift Keying (BPSK) modulated signal towards a geostationary satellite using a commercial up converter to the 14-GHz Ku band. The 70 MHz Intermediate Frequency (IF) numerically controlled oscillator, BPSK modu-lation and digital information carrying the timestamp of the second in the emitter are implemented as software in the FPGA gateware. The downlink and loop back signals are recorded by coherent dual channel SDR receivers and post-processed for fine time of flight analysis and TWSTFT link comparison. Results and lessons learnt during the development are described.
Authors: J.-M Friedt, B. Chupin, M. Lours, É. Meyer, O. Chiu, F. Meyer, W. Daniau, J. Achkar
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4403723970