A5088625087- Advanced Photonic Communication Systems
- Optical Network Technologies
- Advanced Optical Network Technologies
- Power Line Communications and Noise
- PAPR reduction in OFDM
- Millimeter-Wave Propagation and Modeling
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Optical Wireless Communication Technologies
Bangor University
2021-2024
Hybrid orthogonal frequency division multiplexing-digital filter multiple access passive optical networks (OFDM-DFMA PONs) offer a cost-effective solution to the challenging requirements of next-generation and 5G beyond radio networks. It is crucial consider impact timing jitter in any ADC/DAC-based system, therefore this paper presents an in-depth investigation into impacts DAC/ADC on hybrid OFDM-DFMA PON's performance. We introduce improved accuracy white coloured, DAC ADC models,...
Digital signal processing (DSP)-enabled soft reconfigurable optical add/drop multiplexers (Soft-ROADMs) offer flexible switching at wavelength, sub-wavelength and spectrally-overlapped orthogonal (I Q) sub-band (SB) levels, which makes them highly desirable for enabling optical-wireless converged access networks where both fixed wireless services are consolidated in a shared network, network resource efficient cost-effective connectivity solutions. However, the performance of targeted (TSB)...
Employing free-running laser/envelope detection-based millimeter wave (mmWave) signal generation/detection at remote radio heads (RRHs)/user equipment (UE) offers a cost-effective solution for seamlessly integrating existing intensity modulation-direct detection (IM-DD)-dominated optical access networks and wireless networks. Such fiber-wireless convergence enables continuous flow of signals with varying characteristics between the baseband unit (BBU) UE across fiber network segments without...
A novel MIMO-based I/Q Crosstalk Mitigation technique, is demonstrated to effectively mitigate soft-ROADM drop RF signal phase-offset and fiber-induced chromatic-dispersion effects. Thus, simplifying the practical implementation of soft-ROADM-based Point-to-Multipoint 5G fronthaul.
A dual-arm IQ soft-ROADM drop element is demonstrated to dynamically and adaptively any channel pair, from a single optical wavelength containing multiple sub-wavelengths, whilst maintaining an acceptable BER independent of RF signal phase offset. Such soft-ROADMs simplify the practical implementation Point-to-Multipoint 5G fronthauls.
A dual-arm soft-ROADM drop operation with RF-signal phase-offset insensitive performance is demonstrated, which eliminates the need to dynamically control phase-offset. Thus, making soft-ROADMs highly attractive for future optical-wireless converged access networks.
We show that in hybrid OFDM-DFMA PONs, simple receiver-based sideband processing reduces jitter effects, increasing signal to noise ratio by 3dB, thus robustness against white ADC timing and reducing jitter-induced optical power penalty.