Dr Roger Giddings
Senior Lecturer in Optical Communications & DSP

- 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. 751-754Research output: Contribution to journal › Article › peer-review
- Published
Rectangular Orthogonal Digital Filter Banks Based on Extended Gaussian Functions
Jin, W., Zhong, Z., Jiang, S., He, J., Chang, D., Hong, Y., Giddings, R., Jin, X., O'Sullivan, M., Durrant, T., Trewem, J., Mariani, G. & Tang, J., 15 Jun 2022, In: Journal of Lightwave Technology. 40, 12, p. 3709-3722Research output: Contribution to journal › Article › peer-review
- Published
Upstream Power Budgets of IMDD Optical OFDMA PONs Incorporating RSOA Intensity Modulator-Based Colorless ONUs
Jin, X. Q., Groenewald, J., Hugues-Salas, E., Giddings, R. P. & Tang, J. M., 2013, In: Journal of Lightwave Technology. 31, 12, p. 1914-1920 7 p.Research output: Contribution to journal › Article › peer-review
- 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
- E-pub ahead of print
Concurrent Direct Inter-ONU and Upstream Communications in IMDD PONs Incorporating P2MP Flexible Optical Transceivers and Advanced Passive Remote Nodes
Jin, W., Chen, L., He, J., Giddings, R., Huang, Y., Hao, M., Faruk, M. S., Yi, X., Wang, T. & Tang, J., 30 Oct 2024, (E-pub ahead of print) In: Photonics. 11, 11, 1021.Research output: Contribution to journal › Article › peer-review
- 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
- 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. 41363-41377Research output: Contribution to journal › Article › peer-review
- 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 - 2105Research output: Contribution to journal › Article › peer-review
- Published
Experimental demonstration of adaptive bit and/or power loading for maximising real-time end-to-end optical OFDM transmission performance
Jin, X. Q., Giddings, R. P. & Tang, J. M., 2011, p. 1-3. 3 p.Research output: Contribution to conference › Paper › peer-review
- Published
Dependence of upstream power budget on the number of ONUs in IMDD optical OFDMA PONs
Jin, X. Q., Groenewald, J., Hugues-Salas, E., Giddings, R. P. & Tang, J. M., 2013, p. 1-3. 3 p.Research output: Contribution to conference › Paper › peer-review
- 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
- 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. 14574-14585Research output: Contribution to journal › Article › peer-review
- 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
- Published
Experimental Demonstrations of Point-to-Multipoint Flexible Optical Transceiver-Enabled Concurrent Direct Inter-ONU and Upstream Communications in IMDD PONs
Jin, W., Chen, L., He, J., Giddings, R., Hao, M. & Tang, J., 1 Jan 2024.Research output: Contribution to conference › Paper › peer-review
- 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
- Published
Real-Time 3Gb/s 16QAM-Encoded Optical OFDM Transmission over 75km MetroCor SMFs with Negative Power Penalties.
Jin, X. Q., Giddings, R. P., Tang, J. M. & Shore, K. A., 1 Jan 2009.Research output: Contribution to conference › Paper
- 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
- Published
Real-time 11.25Gb/s optical OFDM transmission over 2000m legacy MMFs utilizing directly modulated VCSELs
Hugues-Salas, E., Courjault, N., Jin, X. Q., Giddings, R. P., Aupetit-Berthelemot, C. & Tang, J. M., 2012, p. 1-3. 3 p.Research output: Contribution to conference › Paper › peer-review
- 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 journal › Article › peer-review
- 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 journal › Article › peer-review
- 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. 2979-2988Research output: Contribution to journal › Article › peer-review
- Published
Record-high and robust capacity versus reach performance of adaptive real-time dual-band optical OFDM signals for upgrading legacy MMF systems
Hugues-Salas, E., Zhang, Q. W., Giddings, R. P., Wang, M. & Tang, J. M., 2013, Future Network and Mobile Summit (FutureNetworkSummit), 2013. p. 1-10 10 p.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review
- Published
Real-time 11.25Gb/s optical OFDM signal transmission over 2000m legacy MMFs using centre launching
Hugues-Salas, E., Jin, X. Q., Giddings, R. P., Hong, Y., Mansoor, S., Villafranca, A. & Tang, J. M., 2012, p. 1-8. 8 p.Research output: Contribution to conference › Paper › peer-review
- 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
- Published
REAM intensity modulator-enabled colorless transmission of real-time optical OFDM signals for WDM-PONs
Hugues-Salas, E., Giddings, R. P., Jin, X. Q., Quinlan, T., Hong, Y., Walker, S. & Tang, J. M., 2012, p. 1-3. 3 p.Research output: Contribution to conference › Paper › peer-review
- 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
- Published
Adaptive Hybrid Iterative Linearization Algorithms for IM/DD Optical Transmission Systems
Hu, S., Zhang, J., Tang, J., Jin, T., Lin, H., Jin, W., Yu, Z., Giddings, R. & Qiu, K., 15 Jul 2023, In: Journal of Lightwave Technology. 41, 14, p. 4644-4654 11 p.Research output: Contribution to journal › Article › peer-review
- 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 journal › Article › peer-review
- Published
112-Gb/s PAM-4 IM/DD Optical Transmission over 100-km Single Mode Fiber with Linear Equalizer
Hu, S., Zhang, J., Tang, J., Liu, Q., Jin, W., Zhong, Z., Giddings, R., Shao, J., Jin, T., Zhao, X., Xu, B., Gao, X. & Qiu, K., 13 Apr 2022, 2022 Optical Fiber Communications Conference and Exhibition (OFC). IEEEResearch output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review
- 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
- 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
- Published
Subcarrier index-power modulated optical OFDM with dual superposition multiplexing for IMDD PON systems
Halabi, F., Chen, L., Giddings, R. P., Hamie, A., Dumas, Y., Freyssinet, P., Aupetit-Berthelemot, C. & Tang, J. M., 15 Feb 2019, In: Optics Communications. 433, p. 190-194Research output: Contribution to journal › Article › peer-review
- Published
Subcarrier Index-Power Modulated Optical OFDM and Its Performance in IMDD PON Systems
Halabi, F., Chen, L., Parre, S., Barthomeuf, S., Giddings, R. P., Aupetit-Berthelemot, C., Hamie, A. & Tang, J. M., 1 May 2016, In: Journal of Lightwave Technology. 34, 9, p. 2228-2234 7 p.Research output: Contribution to journal › Article › peer-review
- 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
- Published
Experimental 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
- Published
Experimental 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
- 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
- Published
Seamless 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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. 20666-20679Research output: Contribution to journal › Article › peer-review
- 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
- 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
- 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