Research Portal

Dr Roger Giddings

Senior Lecturer in Optical Communications & DSP

Affiliations

ORCID: 0000-0002-2111-5830
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  1. Published

    Multi-Level Subcarrier Index-Power Modulated Optical OFDM with Adaptive Bit Loading for IMDD PON Systems

    Al Halabi, F., Chen, L., Giddings, R., Tang, J. & Hamie, A., 11 Nov 2016, In: IEEE Photonics Journal. 99

    Research output: Contribution to journal › Article › peer-review

  2. Published

    Subcarrier Grouping-Enabled Improvement in Transmission Performance of Subcarrier Index-Power Modulated Optical OFDM for IM/DD PON Systems

    Al Halabi, F., Chen, L., Giddings, R., Hamie, A. & Tang, J., 15 Oct 2018, In: Journal of Lightwave Technology. 36, 20, p. 4792-4798

    Research output: Contribution to journal › Article › peer-review

  3. Published

    Real-Time experimental demonstration of DSP-enabled soft-ROADMs with multi-level flexible add/drop functions for cloud access networks

    Al-Rawachy, E., Giddings, R. & Tang, J., 7 Jan 2019, In: Optics Express. 27, 1, p. 16-33

    Research output: Contribution to journal › Article › peer-review

  4. Published

    Experimental Demonstration of a Real-Time Digital Filter Multiple Access PON with Low Complexity DSP-Based Interference Cancellation

    Al-Rawachy, E., Giddings, R. P. & Tang, J., 1 Sept 2019, In: Journal of Lightwave Technology. 37, 17, p. 4315-4329 14 p.

    Research output: Contribution to journal › Article › peer-review

  5. Published

    Digital Filter Multiple Access PONs With DSP-Enabled Software Reconfigurability

    Bolea, M., Giddings, R. P., Bouich, M., Aupetit-Berthelemot, C. & Tang, J. M., 2015, In: IEEE Journal of Optical Communications and Networking. 7, 4, p. 215-222 8 p.

    Research output: Contribution to journal › Article › peer-review

  6. Published

    Real-time experimental demonstrations of software reconfigurable optical OFDM transceivers utilizing DSP-based digital orthogonal filters for SDN PONs

    Cao, B., Mansoor, S. P., Tang, J., Duan, X., Giddings, R. P., Bolea, M., Ling, Y., Cao, S., Mansoor, S. & Tang, J. M., 11 Aug 2014, In: Optics Express. 22, 16, p. 19674-19685

    Research output: Contribution to journal › Article › peer-review

  7. Published

    Subcarrier Index-Power Modulated-Optical OFDM with Dual Superposition Multiplexing for Directly Modulated DFB-based IMDD PON Systems

    Chen, L., Halabi, F., Giddings, R. P., Zhang, J. & Tang, J., Dec 2018, In: IEEE Photonics Journal. 10, 6, 7908113.

    Research output: Contribution to journal › Article › peer-review

  8. Published

    Subcarrier Index-Power Modulated Optical OFDM With Superposition Multiplexing for IMDD Transmission Systems

    Chen, L., Al Halabi, F., Giddings, R. & Tang, J., 12 Nov 2016, In: Journal of Lightwave Technology. 34, 22, p. 5284 - 5292

    Research output: Contribution to journal › Article › peer-review

  9. Published

    A Point-to-multipoint Flexible Transceiver for Inherently Hub-and-Spoke IMDD Optical Access Networks

    Chen, L., Jin, W., He, J., Giddings, R., Huang, Y. & Tang, J., 15 Jul 2023, In: Journal of Lightwave Technology. 41, 14, p. 4743-4754 12 p.

    Research output: Contribution to journal › Article › peer-review

  10. Published

    A point-to-multipoint flexible transceiver for inherently hub-and-spoke optical access networks

    Chen, L., Jin, W., He, J., Giddings, R., Huang, Y. & Tang, J., Jul 2023.

    Research output: Contribution to conference › Paper › peer-review

  11. Published

    Experimental demonstrations of 30Gb/s/λ digital orthogonal filtering-multiplexed multiple channel transmissions over IMDD PON systems utilizing 10G-class optical devices

    Deng, M., Sankoh, A., Giddings, R. & Tang, J., 25 Sept 2017, In: Optics Express. 25, 20, p. 24251-24261

    Research output: Contribution to journal › Article › peer-review

  12. Published

    Self-seeding-based 10Gb/s over 25km optical OFDM transmissions utilizing face-to-face dual-RSOAs at gain saturation

    Deng, M., Ling, Y., Chen, X., Giddings, R., Hong, Y., Yi, X. W., Qiu, K. & Tang, J., 19 May 2014, In: Optics Express. 22, 10, p. 11954-11965

    Research output: Contribution to journal › Article › peer-review

  13. Published

    DSP-Enabled Flexible ROADMs without Optical Filters and O-E-O Conversions

    Dong, Y., Tang, J., Jin, W., Duan, X., Dong, Y. X., Cao, B. Y., Giddings, R. P., Zhang, C. F., Qiu, K. & Tang, J. M., 20 Aug 2015, In: Journal of Lightwave Technology. 33, 19, p. 4124-4131

    Research output: Contribution to journal › Article › peer-review

  14. Published

    Hybrid DFT-spread OFDM-Digital Filter Multiple Access PONs for Converged 5G Networks

    Dong, Y. X., Jin, W., Giddings, R. P., O'Sullivan, M., Tipper, A., Durrant, T. & Tang, J. M., Jul 2019, In: IEEE Journal of Optical Communications and Networking. 11, 7, p. 347-353

    Research output: Contribution to journal › Article › peer-review

  15. Published

    Hybrid OFDM-Digital Filter Multiple Access PONs

    Dong, Y., Giddings, R. P. & Tang, J., 1 Dec 2018, In: Journal of Lightwave Technology. 36, 23, p. 5640-5649

    Research output: Contribution to journal › Article › peer-review

  16. Published

    Multiple Channel Interference Cancellation of Digital Filter Multiple Access PONs

    Dong, Y., Al-Rawachy, E., Giddings, R. P., Jin, W., Nesset, D. & Tang, J., Jan 2017, In: Journal of Lightwave Technology. 35, 1, p. 34-44

    Research output: Contribution to journal › Article › peer-review

  17. Published

    Technical and Market Feasibility of High-Speed Software-Reconfigurable OOFDM/DFMA-based Optical Transceiversfor Next Generation Access Network PONs

    Dorward, R. M., Anderson, M. J. & Giddings, R. P., 25 Aug 2016.

    Research output: Contribution to conference › Paper › peer-review

  18. Published

    Tutorial: Real-time digital signal processing for future optical access networks

    Giddings, R., 2013, Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013. p. 1-116 116 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

  19. Published

    Real-time Digital Signal Processing for Optical OFDM-Based Future Optical Access Networks

    Giddings, R., 2014, In: Journal of Lightwave Technology. 32, 4, p. 553-570 18 p.

    Research output: Contribution to journal › Article › peer-review

  20. Published

    30Gb/s real-time triple sub-band OFDM transceivers for future PONs beyond 10Gb/s/λ

    Giddings, R. P., Hugues-Salas, E. & Tang, J. M., 2013, p. 1-3. 3 p.

    Research output: Contribution to conference › Paper › peer-review

  21. Published

    Colourless real-time optical OFDM end-to-end transmission at 7.5Gb/s over 25km SSMF using 1GHz RSOAs for WDM-PONs

    Giddings, R. P., Hugues-Salas, E., Jin, X. Q., Wei, J. L. & Tang, J. M., 2010, p. 1-3. 3 p.

    Research output: Contribution to conference › Paper › peer-review

  22. Published

    Experimental demonstration of colourless real-time end-to-end optical OFDM transmission at 7.5Gb/s over 25km SSMF using a 1GHz RSOA

    Giddings, R. P., Hugues-Salas, E., Jin, X. Q., Wei, J. L. & Tang, J. M., 2010, p. 1-6. 6 p.

    Research output: Contribution to conference › Paper › peer-review

  23. Published

    End-to-end real-time DSP for high-speed optical access/metro links

    Giddings, R. P. & Tang, J. M., 16 Sept 2013, 18th OptoElectronics and Communications Conference . p. 1-2 2 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

  24. Published

    Experimental demonstration of record high 11.25Gb/s real-time end-to-end optical OFDM transceivers for PONs

    Giddings, R. P., Jin, X. Q., Hugues-Salas, E., Giacoumidis, E. & Tang, J. M., 2010, p. 1-13. 13 p.

    Research output: Contribution to conference › Paper › peer-review

  25. Published

    Experimental Demonstration of Real-Time Optical OFDM Transmission at 11.25 Gb/s Over 500-m MMFs Employing Directly Modulated DFB Lasers

    Giddings, R. P., Hugues-Salas, E., Charbonnier, B. & Tang, J. M., 2011, In: IEEE Photonics Technology Letters. 23, 1, p. 51-53 3 p.

    Research output: Contribution to journal › Article › peer-review

  26. Published

    25.25-Gb/s Real-Time Multi-Band Optical OFDM Transmission Over 300-m MMFs With IQ Modulated Passband

    Giddings, R. P., Hugues-Salas, E., Zhang, Q. W., Zhang, J. J., Wang, M. & Tang, J. M., 2013, In: IEEE Photonics Technology Letters. 25, 21, p. 2123-2125 3 p.

    Research output: Contribution to journal › Article › peer-review

  27. Published

    Demonstration of real-time multi-gigabit optical OFDM modems for access networks

    Giddings, R. P., Jin, X. Q., Yang, X. L. & Tang, J. M., 2009, p. 1-2. 2 p.

    Research output: Contribution to conference › Paper › peer-review

  28. Published

    First experimental demonstration of real-time dual-band optical OFDM transmission at 17.5Gb/s over an EML-based 25km SSMF IMDD system using 4GS/s DAC/ADCs

    Giddings, R. P., Hugues-Salas, E., Ben-Ezra, S. & Tang, J. M., 2012, p. 1-3. 3 p.

    Research output: Contribution to conference › Paper › peer-review

  29. Published
  30. Published

    First experimental demonstration of real-time optical OFDM transceivers

    Giddings, R. P., Jin, X. Q., Kee, H. H., Yang, X. L. & Tang, J. M., 2009, p. 1-2. 2 p.

    Research output: Contribution to conference › Paper › peer-review

  31. Published
  32. Published

    Experimental demonstration of record high 19.125Gb/s real-time end-to-end dual-band optical OFDM transmission over 25km SMF in a simple EML-based IMDD system

    Giddings, R. P., Hugues-Salas, E. & Tang, J., 23 Aug 2012, In: Optics Express. 20, 18, p. 20666-20679

    Research output: Contribution to journal › Article › peer-review

  33. Published

    Experimental demonstration of a record high 11.25Gb/s real-time optical OFDM transceiver supporting 25km SMF end-to-end transmission in simple IMDD systems

    Giddings, R. P., Jin, X. Q., Hugues-Salas, E., Giacoumidis, E., Wei, J. L. & Tang, J., 1 Mar 2010, In: Optics Express. 18, 6, p. 5541-5555

    Research output: Contribution to journal › Article › peer-review

  34. Published

    Real-time implementation of optical OFDM transmitters and receivers for practical end-to-end optical transmission systems

    Giddings, R. P., Jin, X., Kee, H., Yang, X. & Tang, J., 16 Jul 2009, In: Electronics Letters. 45, 15, p. 800-802

    Research output: Contribution to journal › Article › peer-review

  35. Published

    Experimental Demonstration of Upstream Transmission in Digital Filter Multiple Access PONs with Real-time Reconfigurable Optical Network Units

    Giddings, R., Duan, X., Mansoor, S. & Tang, J., 26 Jan 2017, In: IEEE Journal of Optical Communications and Networking. 9, 1, p. 45-52 7 p.

    Research output: Contribution to journal › Article › peer-review

  36. Published

    Real-time experimental demonstration of a computationally efficient hybrid OFDM DFMA PON

    Giddings, R., Tyagi, T. & Tang, J., Dec 2022, In: Optical Fiber Technology. 74, 26 p., 103106.

    Research output: Contribution to journal › Article › peer-review

  37. Published

    Timing 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

  38. Published

    Real-Time Demonstration of Concurrent Upstream and Inter-ONU Communications in Hybrid OFDM DFMA PONs

    Giddings, R., Tyagi, T. & Tang, J., 1 Feb 2023, In: IEEE Photonics Technology Letters. 35, 3, p. 148 - 151 4 p.

    Research output: Contribution to journal › Article › peer-review

  39. Published

    DSP-Based Physical Layer Security for Coherent Optical Communication Systems

    Giddings, R., He, J., Tang, J. & Jin, W., Oct 2022, In: IEEE Photonics Journal. 14, 5

    Research output: Contribution to journal › Article › peer-review

  40. Published

    Experimental demonstration of a DSP-based cross-channel interference cancellation technique for application in digital filter multiple access PONs

    Giddings, R., Al-Rawachy, E. & Tang, J., 14 Feb 2017, In: Optics Express. 25, 4, p. 3850-3862 13 p., 270560.

    Research output: Contribution to journal › Article › peer-review

  41. Published

    Chaotic Digital Filter-based Physical Layer Security for Heterogeneous Access Networks

    Giddings, R., He, J., Jin, W. & Tang, J., 30 Sept 2024.

    Research output: Contribution to conference › Paper › peer-review

  42. Published

    Drop 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

  43. Accepted/In press

    Chaotic Digital Filter-based Physical Layer Security in Seamlessly Converged Fiber-mmWave Access Networks

    Giddings, R., He, J., Vallejo Castro, L., Jin, W. & Tang, J., 20 Dec 2024, (Accepted/In press) OFC 2025 Conference Proceedings.

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

  44. Published

    Performance Tolerance of IMDD DFMA PONs to Channel Frequency Response Roll-off

    Giddings, R., Duan, X., Mansoor, S. & Tang, J., 1 Oct 2017, In: IEEE Photonics Technology Letters. 29, 19, p. 1655-1658 4 p.

    Research output: Contribution to journal › Article › peer-review

  45. Published

    First Experimental Demonstration of Real-Time End-to-End Multi-Band 25.25Gb/s Optical OFDM Transmission over 300m OM2 MMFs Employing 4GS/s DACs/ADCs

    Giddings, R. P., Hugues-Salas, E., Zhang, Q. W. & Tang, J. M., 2013, Asia Communications and Photonics Conference 2013. AF1F.4

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

  46. Published

    Experimental Demonstration of Cross-Channel Interference Cancellation for Digital Filter Multiple Access PONs

    Giddings, R. P., Duan, X. & Tang, J., 23 Mar 2016.

    Research output: Contribution to conference › Paper › peer-review

  47. Published

    Experimental 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

  48. Published
  49. Published

    DSP-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

  50. Published
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