Dr Roger Giddings

Senior Lecturer in Optical Communications & DSP

  1. Article › Research › Peer-reviewed
  2. Published
  3. 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 journalArticle

  4. Published

    A Clock-gating-based Energy-efficient Scheme for ONUs in Real-time IMDD OFDM-PONs

    Zhang, J., Zhao, J., Huang, H., Ye, N., Giddings, R., Li, Z., Qin, D., Zhang, Q. & Tang, J., 15 Jul 2020, In : Journal of Lightwave Technology. 38, 14, p. 3573-3583

    Research output: Contribution to journalArticle

  5. Published

    Adaptability-enabled record-high and robust capacity-versus-reach performance of real-time dual-band optical OFDM signals over various OM1/OM2 MMF systems invited]

    Hugues-Salas, E., Zhang, Q., Giddings, R. P., Wang, M. & Tang, J., 2013, In : IEEE Journal of Optical Communications and Networking. 5, 10, A1-A11.

    Research output: Contribution to journalArticle

  6. Published

    Adaptively modulated optical OFDM modems utilizing RSOAs as intensity modulators in IMDD SMF transmission systems.

    Tang, J., Wei, J. L., Hamie, A., Giddings, R. P., Hugues-Salas, E., Zheng, X., Mansoor, S. P. & Tang, J. M., 8 Apr 2010, In : Optics Express. 18, 8, p. 8556-8573

    Research output: Contribution to journalArticle

  7. Published

    Analytical Solution of Stage-dependent Bit Resolution of Full Parallel Variable Point FFTs for Real-time DSP Implementation

    Zhang, J., Wang, J., Giddings, R., Zhang, Q., Peng, J., Chen, J. & Tang, J., 15 Nov 2018, In : Journal of Lightwave Technology. 36, 22, p. 5177-5187

    Research output: Contribution to journalArticle

  8. Published

    Colourless adaptively modulated optical OFDM transmitters using SOAs as intensity modulators.

    Tang, J., Wei, J. L., Yang, X. L., Giddings, R. P. & Tang, J. M., 25 May 2009, In : Optics Express. 17, 11, p. 9012-9027

    Research output: Contribution to journalArticle

  9. Accepted/In press

    Concurrent Inter-ONU Communications for Next Generation Mobile Fronthauls based on IMDD Hybrid SSB OFDM-DFMA PONs

    Zhong, Z., Jin, W., Jiang, S., He, J., Chang, D., Hong, Y., Giddings, R., Jin, X., O'Sullivan, M., Durrant, T., Trewern, J., Mariani, G. & Tang, J., 22 Sep 2021, (Accepted/In press) In : Journal of Lightwave Technology.

    Research output: Contribution to journalArticle

  10. Published

    DFT-Spread Spectrally Overlapped Hybrid OFDM-Digital Filter Multiple Access IMDD PONs

    Sankoh, A., Jin, W., Zhong, Z., He, J., Hong, Y., Giddings, R. & Tang, J., 2 Sep 2021, In : Sensors. 21, 17, 5903.

    Research output: Contribution to journalArticle

  11. 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 journalArticle

  12. Published

    DSP-enabled reconfigurable and transparent spectral converters for converging optical and mobile fronthaul/backhaul networks

    Mao, M. Z., Giddings, R., Cao, B. Y., Xu, Y. T., Wang, M. & Tang, J., 9 Jun 2017, In : Optics Express. p. 13836-13856

    Research output: Contribution to journalArticle

  13. Published

    Data-aided Iterative Algorithms for Linearizing IM/DD Optical Transmission Systems

    Hu, S., Zhang, J., Tang, J., Jin, W., Giddings, R. & Qiu, K., 1 May 2021, In : Journal of Lightwave Technology. 39, 9, p. 2864 - 2872 9 p.

    Research output: Contribution to journalArticle

  14. 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 journalArticle

  15. Published

    Digital Orthogonal Filter-Enabled Optical OFDM Channel Multiplexing for Software-Reconfigurable Elastic PONs

    Tang, J., Bolea, M., Giddings, R. P. & Tang, J. M., 16 Jan 2014, In : Journal of Lightwave Technology. 32, 6, p. 1200-1206

    Research output: Contribution to journalArticle

  16. Published

    Directly Modulated VCSEL-Based Real-Time 11.25-Gb/s Optical OFDM Transmission Over 2000-m Legacy MMFs

    Mansoor, S. P., Tang, J., Hugues-Salas, E., Jin, X. Q., Giddings, R. P., Hong, Y., Mansoor, S., Villafranca, A. & Tang, J. M., 1 Feb 2012, In : IEEE Photonics Journal. 4, 1, p. 143-154

    Research output: Contribution to journalArticle

  17. 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 journalArticle

  18. 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 journalArticle

  19. 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 Sep 2019, In : Journal of Lightwave Technology. 37, 17, p. 4315-4329 14 p.

    Research output: Contribution to journalArticle

  20. Published

    Experimental Demonstrations of Hybrid OFDM-Digital Filter Multiple Access PONs

    Jin, W., Zhong, Z., He, J., Sankoh, A., Giddings, R., Hong, Y., Pierce, I., O'Sullivan, M., Laperle, C., Lee, J., Mariani, G., Durrant, T. & Tang, J., 1 Jul 2020, In : IEEE Photonics Technology Letters. 32, 13, p. 751-754

    Research output: Contribution to journalArticle

  21. Published

    Experimental Demonstrations of Matching Filter-free Digital Filter Multiplexed SSB OFDM IMDD Transmission Systems

    Zhong, Z., Jin, W., Dong, Y., Sankoh, A., He, J., Hong, Y., Giddings, R., Pierce, I., O'Sullivan, M., Lee, J., Mariani, G., Durrant, T. & Tang, J., Apr 2021, In : IEEE Photonics Journal. 13, 2, 12 p., 7900512.

    Research output: Contribution to journalArticle

  22. Published
  23. 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 journalArticle

  24. 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 journalArticle

  25. Published

    Experimental demonstration of real-time 3Gb/s optical OFDM transceivers.

    Tang, J., Giddings, R. P., Jin, X. Q. & Tang, J. M., 14 Sep 2009, In : Optics Express. 17, 19, p. 16654-16665

    Research output: Contribution to journalArticle

  26. 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 journalArticle

  27. Published

    Experimental demonstrations and extensive comparisons of end-to-end real-time optical OFDM transceivers with adaptive bit and/or power loading

    Tang, J., Jin, X. Q., Wei, J. L., Giddings, R. P., Quinlan, T., Walker, S. & Tang, J. M., 1 Jun 2011, In : IEEE Photonics Journal. 3, 3, p. 500-511

    Research output: Contribution to journalArticle

  28. 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 Sep 2017, In : Optics Express. 25, 20, p. 24251-24261

    Research output: Contribution to journalArticle

  29. Published

    Experimental demonstrations of record high REAM intensity modulator-enabled 19.25Gb/s real-time end-to-end dual-band optical OFDM colorless transmissions over 25km SSMF IMDD systems

    Zhang, Q. W., Hugues-Salas, E., Giddings, R. P., Wang, M. & Tang, J. M., 2013, In : Optics Express. 21, 7, p. 9167-9179 13 p.

    Research output: Contribution to journalArticle

  30. Published

    First experimental demonstration of 6Gb/s real-time optical OFDM transceivers incorporating channel estimation and variable power loading.

    Tang, J., Giddings, R. P., Jin, X. Q. & Tang, J. M., 1 Oct 2009, In : Optics Express. 17, 22, p. 19727-19738

    Research output: Contribution to journalArticle

  31. Published

    First real-time experimental demonstrations of 11.25Gb/s optical OFDMA PONs with adaptive dynamic bandwidth allocation

    Tang, J., Jin, X. Q., Hugues-Salas, E., Giddings, R. P., Wei, J. L., Groenwald, J. & Tang, J. M., 3 Oct 2011, In : Optics Express. 19, 21, p. 20557-20570

    Research output: Contribution to journalArticle

  32. 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 journalArticle

  33. 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 journalArticle

  34. Published

    Hybrid OFDM-Digital Filter Multiple Access PONs Utilizing Spectrally Overlapped Digital Orthogonal Filtering

    Sankoh, A., Jin, W., Zhong, Z., He, J., Hong, Y., Giddings, R., Pierce, I., O'Sullivan, M., Lee, J., Durrant, T. & Tang, J., Oct 2020, In : IEEE Photonics Journal. 12, 5, 10 p., 7905311.

    Research output: Contribution to journalArticle

  35. Published

    Hybrid SSB OFDM-Digital Filter Multiple Access PONs

    Jin, W., Sankoh, A., Dong, Y., Giddings, R., O'Sullivan, M., Durrant, T., Lee, J. & Tang, J., 15 Apr 2020, In : Journal of Lightwave Technology. 38, 8, p. 2095 - 2105

    Research output: Contribution to journalArticle

  36. Published

    Improved Performance Robustness of DSP-Enabled Flexible ROADMs Free from Optical Filters and O-E-O Conversions

    Jin, W., Zhang, C., Duan, X., Kadhum, M. R., Dong, Y. X., Giddings, R. P., Jiang, N., Qiu, K. & Tang, J. M., 1 Aug 2016, In : IEEE Journal of Optical Communications and Networking. 8, 8, p. 521-529 9 p.

    Research output: Contribution to journalArticle

  37. Published

    Intra-Cavity Chromatic Dispersion Impacts on 10-Gb/s Optical OFDM Transmissions Over 25-km Dual-RSOA-Based Self-Seeded PON Systems

    Tang, J., Deng, M. L., Cao, B. Y., Giddings, R. P., Dong, Y. X., Jiang, N., Nesset, D., Qiu, K. & Tang, J. M., 18 Dec 2014, In : IEEE Photonics Journal. 7, 1

    Research output: Contribution to journalArticle

  38. 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 journalArticle

  39. 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 journalArticle

  40. Published

    Negative power penalties of optical OFDM signal transmissions in directly modulated DFB laser-based IMDD systems incorporating negative dispersion fibers.

    Tang, J., Zheng, X., Jin, X. Q., Giddings, R. P., Wei, J. L., Hugues-Salas, E., Hong, Y. & Tang, J. M., 1 Aug 2010, In : IEEE Photonics Journal. 2, 4, p. 532-542

    Research output: Contribution to journalArticle

  41. 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 journalArticle

  42. Published

    REAM intensity modulator-enabled 10Gb/s colorless upstream transmission of real-time optical OFDM signals in a single-fiber-based bidirectional PON architecture

    Hugues-Salas, E., Giddings, R. P., Jin, X. Q., Hong, Y., Quinlan, T., Walker, S. & Tang, J. M., 2012, In : Optics Express. 20, 19, p. 21089-21100 12 p.

    Research output: Contribution to journalArticle

  43. Published

    RSOA Intensity Modulator Frequency Chirp-Enhanced Optical OFDM PON Performance

    Tang, J., Cao, B., Deng, M., Cao, B. Y., Deng, M. L., Zhang, Q. W., Giddings, R. P. & Wang, M., 5 Jun 2015, In : IEEE Photonics Journal. 7, 3, p. Article Number: 7101711

    Research output: Contribution to journalArticle

  44. 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 journalArticle

  45. 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 journalArticle

  46. Published

    Real-time experimental demonstration of low-cost VCSEL intensity-modulated 11.25Gb/s optical OFDM signal transmission over 25km PON systems

    Hugues-Salas, E., Giddings, R. P., Jin, X. Q., Wei, J. L., Zheng, X., Hong, Y., Shu, C. & Tang, J., 1 Feb 2011, In : Optics Express. 19, 4, p. 2979-2988

    Research output: Contribution to journalArticle

  47. 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 journalArticle

  48. 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 journalArticle

  49. Published

    Real-time transmission of 3Gb/s 16-QAM encoded optical OFDM signals over 75km SMFs with negative power penalties

    Jin, X., Tang, J. & Giddings, R., 17 Aug 2009, In : Optics Express. 17, 17, p. 14574-14585

    Research output: Contribution to journalArticle

  50. Published

    Record-high and robust 17.125 Gb/s gross-rateover 25 km SSMF transmissions of real-time dual-band optical OFDM signals directly modulated by 1 GHz RSOAs

    Zhang, Q. W., Hugues-Salas, E., Ling, Y., Zhang, H. B., Giddings, R. P., Zhang, J. J., Wang, M. & Tang, J. M., 2014, In : Optics Express. 22, 6, p. 6339-6348 10 p.

    Research output: Contribution to journalArticle

  51. Published

    Robust and tunable 16.375Gb/s dual-band optical OFDM transmissions over directly modulated VCSEL-based 200m OM2 MMFs

    Tang, J., Deng, M. L., Jiang, N., Duan, X., Giddings, R. P., Yi, X. W., Cao, B. Y., Mansoor, S. P., Qiu, K. & Tang, J. M., 8 Jan 2015, In : Optics Express. 23, 1, p. 373-383

    Research output: Contribution to journalArticle

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