Synchronous Clock and RF Carrier Transmission for Radio Access Network Fronthaul
Kari Aaron Clark, Zun Htay, Zichuan Zhou, Amany Kassem, Andrea Pertoldi, Benjamin Rudin, Florian Emaury, Izzat Darwazeh, Zhixin Liu

TL;DR
This paper presents a novel method for radio access network fronthaul that combines clock phase caching and frequency comb transmission to achieve ultra-low noise RF carrier generation, precise clock synchronization, and stable data transmission.
Contribution
It introduces a new integrated approach for simultaneous clock synchronization and RF carrier generation in RAN fronthaul, achieving unprecedented jitter and wander performance.
Findings
<100fs jitter for 25GHz RF carrier
2.5GHz clock synchronization with <100fs jitter
16-hour 6.6ps RMS wander stability
Abstract
We simultaneously achieve clock synchronisation, clock-synchronised data transmission and ultra-low noise RF carrier generation by combining clock phase caching and frequency comb transmission in radio access networks (RAN). We demonstrate <100fs jitter for 25GHz RF carrier and 2.5GHz clock, and 16-hour 6.6ps RMS wander.
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Taxonomy
TopicsAdvancements in PLL and VCO Technologies · Advanced Frequency and Time Standards · Advanced Photonic Communication Systems
