Abstract
A highly flexible wavelength and space switched analog radio-over-fiber (ARoF) fronthaul transmission of a millimeter-wave (mmWave) emerging 6G waveform over a centralized/cloud radio access network (C-RAN) is experimentally demonstrated in this work. A spread spectrum multiplexing technique - orthogonal chirp division multiplexing (OCDM) - which is highly resilient to inter-channel interference and enables enhanced channel estimation is utilized in the fronthaul transmission demonstration. The flexible properties of a low noise silicon photonic (SiP) microring resonator (MRR) based tunable laser and a low cross-talk 4 × 4 SiP optical wavelength/space switch are combined to form a reconfigurable 10 km fronthaul system enabling 64-QAM OCDM transmission at 24 GHz with consistent performances 5% EVM across all test wavelengths/ports. A signal constituting Wi-Fi and 5G NR standard compatible 64-QAM orthogonal frequency division multiplexing (OFDM) bands, at 10 GHz and 24 GHz respectively, are also transmitted and evaluated in the proposed system with EVM performances below 64-QAM EVM limit (8%) achieved, thus demonstrating the system's potential in a future converged multi-service environment.
| Original language | English |
|---|---|
| Pages (from-to) | 653-656 |
| Number of pages | 4 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 35 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 15 Jun 2023 |
Keywords
- 5G NR
- 6G
- ARoF
- C-RAN
- mmWave
- OCDM
- OFDM
- SiP laser
- SiP switch
- Wi-Fi