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

    Multi-Constraint Gerchberg-Saxton Iteration Algorithms for Linearizing IM/DD Transmission Systems

    Hu, S., Zhang, J., Tang, J., Jin, T., Jin, W., Liu, Q., Zhong, Z., Giddings, R., Hong, Y., Xu, B., Yi, X. & Qiu, K., 14 Mar 2022, In: Optics Express. 30, 6, p. 10019-10031 13 p.

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

  3. Published

    Low-complexity modulation format identification based on am- 2 plitude histogram distributions for digital coherent receivers

    Hao, M., Jiang, X., Xiong, X., Giddings, R., He, W. & Tang, J., 20 Apr 2023, In: Photonics.

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

  4. Published

    Intra-Cavity Dispersion-Induced Performance Degradations of Dual-RSOA-Based Self-Seeded PON Systems

    Tang, J., Giddings, R. P., Tang, J. M., Deng, M., Cao, B., Giddings, R., Dong, Y., Jian, N., Nesset, D. & Qiu, K., 22 Mar 2015.

    Research output: Contribution to conference › Paper

  5. 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 journal › Article › peer-review

  6. Published

    Input/output reconfigurable adaptively modulated optical OFDM modems using subcarrier modulation

    Zheng, X., Wei, J. L., Yang, X. L., Giddings, R. P., Tang, J. M. & Shore, K. A., 2009, p. 1-2. 2 p.

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

  7. Published

    Improvement in Convergence Rate and Power Penalty with an Error-Controlled Iterative Algorithm in IMDD Systems

    Jin, X., Jin, W., Zhong, Z., Jiang, S., Rajbhandari, S., Hong, Y., Giddings, R. & Tang, J., 2022, p. 1-2. 2 p.

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

  8. Published

    Improved power budgets of end-to-end real-time optical OFDM PON systems using wavelength-offset optical filtering

    Wei, J. L., Hugues-Salas, E., C, S., [No Value], XE., [Unknown], N., Jin, X. Q., Giddings, R. P., Pierce, I., Ortega, B., Shu, C. & Tang, J. M., 2012, p. 1-3. 3 p.

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

  9. 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 journal › Article › peer-review

  10. Published

    IFFT Stage-dependent Minimum Bit Resolution Maps for Real-time Optical OFDM Transceivers

    Zhang, J., Giddings, R. P., Tang, J., Zhang, Q., Yuan, W., Giddings, R. & Wang, M., 9 Mar 2014.

    Research output: Contribution to conference › Paper

  11. 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 journal › Article › peer-review

  12. 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 journal › Article › peer-review

  13. 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

  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

    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 journal › Article › peer-review

  16. 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

  17. 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

  18. Published

    First experimental demonstration of real-time adaptive transmission of 20Gb/s dual-band optical OFDM signals over 500m OM2 MMFs

    Hugues-Salas, E., Giddings, R. P. & Tang, J. M., 2013, Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013. p. 1-3 3 p.

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

  19. Published

    First experimental demonstration of low-cost VCSEL-intensity modulated end-to-end real-time optical OFDM signal transmission at 11.25Gb/s over 25km SSMFs

    Hugues-Salas, E., Giddings, R. P., Hong, Y., Jin, X. Q., Wei, J. L., Zheng, X. & Tang, J. M., 2011, p. 1-3. 3 p.

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

  20. Published

    First experimental demonstration of end-to-end real-time optical OFDM symbol synchronization using subtraction and Gaussian windowing in 25km SMF IMDD systems

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

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

  21. Published

    First experimental demonstration of VCSEL-based realtime end-to-end 11.25Gb/s optical OFDM signal transmission over 800m MMFs

    Hugues-Salas, E., Jin, X. Q., Giddings, R. P., Wei, J. L., Shu, C. & Tang, J. M., 2011, p. 1-3. 3 p.

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

  22. 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 journal › Article › peer-review

  23. 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

  24. 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 journal › Article › peer-review

  25. Published

    Experimental demonstrations of DSP-enabledflexibility, adaptability and elasticity ofmulti-channel >72Gb/s over 25 km IMDDtransmission systems

    Jin, W., Zhong, Z., Jiang, S., He, J., Hu, S. H., Chang, D., Giddings, R., Hong, H., Jin, X., O'Sullivan, M., Durrant, T., Trewern, J., Mariani, G. & Tang, J., 30 Nov 2021, In: Optics Express. 29, 25, p. 41363-41377

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

  26. 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

  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 journal › Article › peer-review

  28. 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

  29. 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

  30. Published

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

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

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

  31. 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

  32. Published
  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

    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

  35. Published

    Experimental demonstration and optimisation of a synchronous clock recovery technique for real-time end-to-end optical OFDM transmission at 11.25Gb/s over 25km SSMF

    Tang, J., Giddings, R. P. & Tang, J. M., 28 Jan 2011, In: Optics Express. 19, 3, p. 2831-2845

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

  36. 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 journal › Article › peer-review

  37. 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 journal › Article › peer-review

  38. Published

    Experimental Demonstrations of Concurrent Adaptive Inter-ONU and Upstream Communications in IMDD Hybrid SSB OFDM-DFMA PONs

    Zhong, Z., Jin, W., He, J., Chang, D., Giddings, R., Hong, Y., O'Sullivan, M., Durrant, T., Mariani, G., Trewern, J. & Tang, J., 6 Jun 2021.

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

  39. 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

  40. 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

  41. Accepted/In press

    Experimental Demonstration of Soft-ROADMs with Dual-Arm Drop Elements for Future Optical-Wireless Converged Access Networks

    Gonem, O., Giddings, R. & Tang, J., 25 Oct 2023, (Accepted/In press) In: Journal of Lightwave Technology. 13 p., JLT-32905-2023.R1 .

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

  42. 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

  43. Published

    Experimental Demonstration of DSP-enabled Drop Operations of Flexible ROADMs Excluding Optical Filters and O-E-O Conversions

    Tang, J., Duan, X., Deng, M., Jin, W., Giddings, R. P. & Mansoor, S., 22 Mar 2016.

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

  44. 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

  45. Published

    Error-Controlled Iterative Algorithms for Digital Linearization of IMDD-based Optical Fibre Transmission Systems

    Jin, X., Jin, W., Zhong, Z., Jiang, S., Raibhjandari, S., Hong, Y., Giddings, R. & Tang, J., 18 Jul 2022, In: Journal of Lightwave Technology.

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

  46. Published

    End-to-end real-time demonstration of 128-QAM-encoded optical OFDM transmission with a 5.25bit/s/Hz spectral efficiency over IMDD systems

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

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

  47. 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

  48. 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

  49. 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 journal › Article › peer-review

  50. Published

    Digital Orthogonal Filtered Optical OFDM for Elastic PONs

    Tang, J., Giddings, R. P., Tang, J. M., Bolea, M. & Giddings, R., 9 Mar 2014.

    Research output: Contribution to conference › Paper

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