I am currently studying the effects of Timing Synchronization on the performance of OFDM-based Passive Optical Networks (PONs)

2025

• PublishedExperimental Investigation of a Seamlessly Converged Fiber-Wireless Access Network Employing Free-Running Laser- and Envelope Detection-based mmWave Generation and Detection
  Vallejo Castro, L., Gonem, O., Jin, W., Faruk, M. S., Giddings, R., Yi, X. & Tang, J., 7 Jan 2025, In: Optics Express. 33, 1, p. 604-618
  Research output: Contribution to journal › Article › peer-review

2024

• PublishedExperimental Demonstration of Soft-ROADMs with Dual-Arm Drop Elements for Future Optical-Wireless Converged Access Networks
  Gonem, O., Giddings, R. & Tang, J., 15 Mar 2024, In: Journal of Lightwave Technology. 42, 6, p. 1773-1785 13 p.
  Research output: Contribution to journal › Article › peer-review
• PublishedSeamless Fiber-Wireless Access Network Convergence with Dynamic O-E-O Conversion-less Sub-Wavelength Switching and Tunable Photonic mmWave Generation
  Gonem, O., Vallejo Castro, L., He, J., Giddings, R., Jin, W., Yi, X., Faruk, M. S. & Tang, J., 15 Nov 2024.
  Research output: Contribution to conference › Paper › peer-review
• E-pub ahead of printSeamlessly Converged Fiber-Wireless Access Networks with Dynamic Sub-wavelength Switching and Tunable Photonic mmWave Generation
  Vallejo Castro, L., Gonem, O., Jin, W., Giddings, R., Chen, L., Huang, Y., Yi, X., Faruk, M. S. & Tang, J., 15 Nov 2024, (E-pub ahead of print) In: Journal of Lightwave Technology.
  Research output: Contribution to journal › Article › peer-review
• Accepted/In pressSoft-ROADM-enabled Seamlessly Converged Optical-Wireless Access Networks with Free-Running Laser-based Tunable mmWave Generation and RF Envelope Detection
  Vallejo Castro, L., Gonem, O., Jin, W., Giddings, R. & Tang, J., 28 Mar 2024, (Accepted/In press).
  Research output: Contribution to conference › Paper › peer-review

2023

• PublishedDrop Signal Phase Offset Independent Soft-ROADMs for Point-to-Multipoint 5G Fronthauls
  Giddings, R., Gonem, O. & Tang, J., Jul 2023, p. 1-6. 6 p.
  Research output: Contribution to conference › Paper › peer-review
• PublishedExperimental Demonstration of Soft-ROADMs with Drop Signal Phase Independent Performance for PTMP 5G Fronthauls
  Gonem, O., Giddings, R. & Tang, J., 2 Nov 2023.
  Research output: Contribution to conference › Paper › peer-review
• PublishedExperimental Demonstration of a Dual-Arm Drop Element-Based Soft-ROADM for Future Optical-Wireless Converged Access Networks
  Gonem, O., Giddings, R. & Tang, J., 2023, p. 1-5. 5 p.
  Research output: Contribution to conference › Paper › peer-review

2021

• PublishedDSP-based Reduction of the Impact of White ADC Timing Jitter on Hybrid OFDM-DFMA PONs
  Gonem, O., Giddings, R. & Tang, J., 26 Jul 2021. 2 p.
  Research output: Contribution to conference › Paper › peer-review
• PublishedTiming Jitter Analysis and Mitigation in Hybrid OFDM-DFMA PONs
  Giddings, R., Gonem, O. & Tang, J., Dec 2021, In: IEEE Photonics Journal. 13, 6, 13 p., 7200313.
  Research output: Contribution to journal › Article › peer-review

2024

• TITAN Research Community Event

  TITAN Research Community Event at the University of Cambridge - in total, 90 researchers from 24 partner institutions were in attendance.

  13 Sep 2024

  Activity: Participation in Academic workshop, seminar, course (Speaker)

2023

• DSP Centre & Keysight Technology Seminar

  A technology seminar for Bangor University students, staff, and industry experts, led by Keysight, to provide technical support and expertise to the DSP Centre and University, and identify future collaboration opportunities.

  2 Nov 2023

  Activity: Types of Public engagement and outreach - Public lecture/debate/seminar (Presenter)
• 2-day Training School

  Third NEWFOCUS Training School, covering WGs 2, 3, and 4, from Short to Long-range OWC systems. The Third Training School was held at the DSP Centre of Excellence at Bangor University, on 17-18 July 2023

  On Monday 17th and Tuesday 18th July 2023, the DSP Centre hosted a bespoke Training School for PhD students, to explore the latest advancements in short-to-long range optical wireless communication (OWC) systems.

  Twenty-three students from universities across the UK and Europe, who are currently studying towards PhD degrees in subjects across the field of optical communications, were selected to attend the two-day Training School, to learn about our research in OWC systems and innovative digital signal processing (DSP) technologies.

  Several world-leading experts from universities across the globe (including the University of Oxford, University of Edinburgh, Northumbria University, Valencia Polytechnic University - Spain, & University of Aveiro - Portugal) joined us in-person, to present their research in a series of lectures and tutorials for the students. DSP Centre Senior Lecturers, Dr Roger Giddings and Dr Sujan Rajbhandari, then led specialist workshops presenting our digital communication technologies and providing guidance on publishing scientific research papers. The trainees also had the opportunity see live technical demonstrations on our state-of-the-art equipment and get involved in some practical activities led by our research team.

  The Training School was organised as part of ‘NEWFOCUS’; an EU-funded project led by a network of university academics, research institutions, businesses and government bodies across UK and Europe, aiming to develop sophisticated communication systems that meet the demands of future networks. These days, current networks, such as 3G and 4G, are struggling to cope with various pressures, including risks to online security and privacy, demands for faster online connection, and the need to reduce environmental impacts. In 2023, we successfully submitted an application to COST (European Cooperation in Science and Technology); the funding organisation responsible for the NEWFOCUS project, to deliver the Training School, to share the research we’re leading and the technologies we’re developing to meet these demands and make future networks more accessible, more convenient and more secure.

  Dr Sujan Rajbhandari, Senior Lecturer and organiser of the event, said

  'the Training School provided the platform for the DSP Centre, students and experts from across the world to come together to share knowledge, establish academic partnerships, and to showcase the world-leading research that takes place here at Bangor University. It was a highly rewarding experience for DSP Centre colleagues to meet fellow students and experts from across the world and has opened the doors for further research collaborations in the future. '

  17 Jul 2023 – 18 Jul 2023

  Activity: Types of External academic engagement - Contribution to the work of national or international committees and working groups (Presenter)