Hybrid Single-/Multi-Carrier FR3-Band Radio With Optical Frequency Synthesis and Carrier Reclamation

We evaluate hybrid analogue/digital transmission
based on adaptive modulation over point-to-point FR3-band
channels characterized by frequency-flat fading. In support of
low-complexity end-to-end fiber-wireless transmission, radio
transport is further assisted by an 8- to 12-fold optical frequency
multiplication for the purpose of carrier frequency synthesis,
thus ensuring mobile fronthaul operation in a fading-agnostic
low-frequency range and compatible with highly simplified
opto-electronics. We will experimentally demonstrate two FR3
over-the-air modes, including an orthogonally frequency division
multiplexed multi-carrier format and single-carrier binary
phase-shift keyed signaling, which are accomplished over optical
fronthaul budgets of more than 17 dB and in combination with
carrier frequency reclamation for full-duplex single-carrier
transmission using a paired FR3-band spectrum.