Sigma delta radio over fiber (S?-RoF) system for 5G cloud/centralized radio access network (C-RAN) has a potential due to the advantages it offers in terms of cost and efficiency. It is observed that the presence of 1-bit sigma delta (S?) modulation results in high quantization error that can be reduced by addition of band pass filter (BPF) at the receiver side. However, there is an additional disadvantage linked with the presence of BPF that results in the addition of magnitude and phase noise that severely affects the signal integrity. In order to reduce the effects of conventional BPF, a Pre-BPF is proposed which is inserted before S? modulator to counteract the magnitude and phase response of conventional BPF. The proposed system is validated for 5G new radio (NR) 100-MHz signal with 256 quadrature amplitude modulation centered at 3 GHz with 5 km of link length. It is reported that the Pre-BPF-S?-RoF results in significant reduction of error vector magnitude as compared to conventional BPF-S?-RoF system.
|Title of host publication||3rd International Conference on Communication Technologies, ComTech 2021|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||4|
|Publication status||Published - 6 Nov 2021|
|Event||3rd International Conference on Communication Technologies, ComTech 2021 - Rawalpindi, Pakistan|
Duration: 21 Sep 2021 → 22 Sep 2021
|Name||3rd International Conference on Communication Technologies, ComTech 2021|
|Conference||3rd International Conference on Communication Technologies, ComTech 2021|
|Period||21/09/21 → 22/09/21|
Bibliographical notePublisher Copyright:
© 2021 IEEE.
- 5G Fronthaul
- Radio over Fiber
- Sigma Delta Modulation