Publications

Bream Steering/Directional Communications

  • C. Pollock, J. Morrison, M. Imboden, T.D.C. Little, and D.J. Bishop, “Beam Shaping with Tip-Tilt Varifocal Mirror for Indoor Optical Wireless Communication,” Optics Express, Vol. 25, Issue 17, pp. 20274-20285, 2017.
  • M.B. Rahaim, J. Morrison, T.D.C. Little, “Beam Control for Indoor FSO and Dynamic Dual-Use VLC Lighting Systems,” J. Communications and Information Networks, (2017) 2: 11.
  • M.B. Rahaim and T.D.C. Little, “Ultra-Dense IoT Architecture using Hybrid CSMA with Sector Based Scheduling (CSMA/SS) via Visible Light Communications,” ACM MadCom, Proc. Intl. Conf. on Embedded Wireless Systems and Networks (EWSN), Uppsala, Sweden, Feb. 20-22, 2017.
  • J. Morrison, M.B. Rahaim, Y. Miao, M. Imboden, T.D.C. Little, V.J. Koomson, and D.J. Bishop, “Directional visible light communication signal enhancement using a varifocal micromirror with four degrees of freedom,” Proc. SPIE 9954, Fifteenth International Conference on Solid State Lighting and LED-based Illumination Systems, 99540C, September 7, 2016.
  • J. Morrison, M. Imboden, T.D.C. Little, and D.J. Bishop, “Electrothermally Actuated Tip-Tilt-Piston Micromirror with Integrated Varifocal Capability,” Optics Express, 2015.
  • M.B. Rahaim and T.D.C. Little, “SINR Analysis and Cell Zooming with Constant Illumination for Indoor VLC Networks,” Proc. 2nd Intl. Workshop on Wireless Optical Communications (IWOW) 2013, Northumbria University, Newcastle Upon Tyne, UK, October 21, 2013.
  • M.B. Rahaim, G.B. Prince, and T.D.C. Little, “State Estimation and Motion Tracking for Spatially Diverse VLC Networks,” Proc. 3rd IEEE Workshop on Optical Wireless Communications, Anaheim, CA, December 2012.

Modulation

  • A. Hussein, H. Elgala, and T.D.C. Little, “Visible Light Communications: Toward Multi-Service Waveforms,” in Proc. IEEE CCNC 2018, January 2018.
  • T.D.C. Little and H. Elgala, “Optical Orthogonal Frequency Division Multiplexing (O-OFDM) System with Pulse-Width Modulation (PWM) Dimming,” Patent No. US 9,621,268 B2, April 11, 2017.
  • A. Mirvakilli, H. Elgala, T.D.C. Little, V.J. Koomson, “Dimming and Modulation for VLC-Enabled Lighting,” in Optical Wireless Communications, M Uysal, C. Capsoni, Z. Ghassemlooy, A. Boucouvalas, E. Udvary (eds.), pp. 409-430, 2016.
  • H. Elgala and T.D.C. Little, “Polar-Based OFDM and SC-FDE Links towards Energy-Efficient Gbps Transmission under IM-DD Optical System Constraints [Invited],” to appear in J. Optical Communications and Networking,, Vol. 7, No. 2, January 2015.
  • H. Elgala, S.K. Wilson, and T.D.C. Little, “Optical Polar OFDM: on the Effect of Time-Domain Power Allocation Under Power and Dynamic Range Constraints,” to appear in Proc. IEE WCNC 2015, 2015 IEEE Wireless Communications and Networking Conference (WCNC) – Track 1: PHY and Fundamentals, 2015.
  • H. Elgala and T.D.C. Little, “SEE-OFDM: Spectral and Energy Efficient OFDM for Optical IM/DD Systems,” in Proc. IEEE Intl. Symp. on Personal, Indoor and Mobile Radio Communications (PIMRC 2014),Sept. 2-5, 2014, Washington DC.
  • M. Biagi, A.M. Vegni, S. Pergoloni, P. Butala, and T.D.C. Little, “Trace-Orthogonal PPM-Space Time Block Coding Under Rate Contstraints for Visible Light Communication,” J. of Lightwave Technology, January 2015.
  • H. Elgala, and T.D.C. Little, “P-OFDM: Spectrally Efficient Unipolar OFDM,” Proc. Optical Fiber Communication Conference and Exposition (OFC), March 13, 2014, San Francisco, CA, 2014.
  • T.D.C. Little and H. Elgala, “Adaptation of OFDM under Visible Light Communications and Illumination Constraints,” to appear in Proc. Asilomar Conference on Signals, Systems, and Computers, November 2-5, 2014, CA.
  • M. Biagi, T. Borogovac, and T.D.C. Little, “Adaptive Receiver for Indoor Visible Light Communications,” IEEE/OSA J. of Lightwave Technology, 2014.
  • T.D. C. Little and H. Elgala, “Adaptation of OFDM under Visible Light Communications and Illumination Constraints”, the Asilomar Conference on Signals, Systems, and Computers, November 2-5, 2014, CA.
  • T.D.C. Little and Hany Elgala, “SEE-OFDM: Spectral and Energy Efficient OFDM for Optical IM/DD Systems”, submitted.
  • J. Gancarz, H. Elgala, and T.D.C. Little, “Impact of Lighting Requirements on VLC Systems,” IEEE Communications Magazine, Special Issue on Visible Light Communications December 2013.
  • H. Elgala and T.D.C. Little, “Reverse Polarity Optical-OFDM (RPO-OFDM): Dimming Compatible OFDM for Gigabit VLC Links,” Optics Express, Vol. 21, Issue 20, pp. 24288-24299 (2013).
  • H. Elgala, and T.D.C. Little, “P-OFDM: Spectrally Efficient Unipolar OFDM,” Optical Fiber Communication Conference and Exposition (OFC), March 13, 2014, San Francisco, CA, 2014.
  • T.D.C. Little, H. Elgala, Provisional patent application: Optical Orthogonal Frequency Division Multiplexing (O-OFDM) Combined with Pulse-Width Modulation (PWM) Dimming.

OW MIMO

  • J.C. Chau, C. Morales, and T.D.C. Little, “Using Spatial Light Modulators within MIMO Visible Light Receivers to Dynamically Control the Optical Channel,” Proc. MadCOM 2016, Graz Austria, April 2016.
  • Chau and T.D.C. Little, “Analysis of CMOS Active Pixel Sensors as Linear Shift-Invariant Receivers,” Proc. IEEE ICC 2015 — 1st Workshop on Visible Light Communications and Networking (VLCN), June 2015.
  • P.M. Butala, H. Elgala, T.D.C. Little, and P. Zharkesh-Ha, “Multiwavelength Visible Light Communications System Design,” in Proc. IEEE Globecom Workshop on Optical Wireless Communications, December 2014.
  • J.C. Chau and T.D.C. Little, “Scalable Imaging VLC Receivers with Token-Based Pizel Selection for Spatial Multiplexing,” Proc. 1st ACM Mobicom Wokrshop on Visible Light Communication Systems, Maui, HI, September 2014.
  • P. Butala, H. Elgala, T.D.C. Little, “Sample Indexed Spatial Orthogonal Frequency Division Multiplexing,” Chinese Optics Letters, Volume 12 Issue 9, 2014.
  • P. Butala, H. Elgala, and T.D.C. Little, “Performance of Optical Spatial Modulation and Spatial Multiplexing with Imaging Receiver,” Proc. IEEE Wireless Communications and Networking Conference (WCNC) 2014, Istanbul, Turkey, April 6, 2014.
  • P. Butala, H. Elgala, T.D.C. Little, “Sample Indexed Spatial Orthogonal Frequency Division Multiplexing,” Chinese Optics Letters, Volume 12 Issue 9, 2014 (to appear)
  • P. Butala, H. Elgala, and T.D.C. Little, “Performance of Optical Spatial Modulation and Spatial Multiplexing with Imaging Receiver,’’ Proc. IEEE Wireless Communications and Networking Conference (WCNC) 2014, Istanbul, Turkey, April 6, 2014.
  • P. Butala, H. Elgala, and T.D.C. Little, “SVD-VLC: A Novel Capacity Maximizing VLC MIMO System Architecture Under Illumination Constraints,” in Proc. IEEE Globecom Workshop on Optical Wireless Communications, December 2013.
  • Imaging
  • B. Nakhkoob, M. Hella, “A 5 Gbps Noise Optimized Receiver Using a Switched TIA for Wireless Optical Communications”, IEEE trans. CAS-I , Vol. 61, issue 4, April 2014, pp. 1255-1268.
  • B. Nakhkoob, and M. M. Hella, “A 4.7-Gb/s Imaging Receiver with Adaptive Spectrum Re-Balancing Equalizer for Wireless Optical Communications,” Radio Frequency IC Design Symposium, RFIC, Tampa, FL, June 2014.
  • S. Ray and M. M. Hella, “A switching architecture for CMOS exponential function generators eliminating squarer/multiplier circuits, IET Electronic Letters, March 2014
  • S. Ray, and M. M. Hella, “A 2.2GHz-80dB Ohm CMOS Receiver Front-End for Short-Range Optical Communication Employing DMT/OFDM,” ISCAS,  June 2014, Sydney, Australia.
  • Drivers
  • A. Mirvakili and V. J. Koomson, “A Flicker-free CMOS LED Driver Control Circuit for Visible Light Communication Enabling Concurrent Data Transmission and Dimming Control,” Analog Integrated Circuits and Signal Processing, 2014.
  • A. Mirvakili and V. J. Koomson, “Passive frequency compensation for high gain‐bandwidth and high slew‐rate two‐stage OTA,” Electronics Letters, vol. 50, no. 9, pp. 657 – 659, Apr. 2014.

Small Cells/Mobility

  • T.D.C. Little, M.B. Rahaim, I. Abdalla, E. Lam, R. Mcallister, A.M. Vegni, “A Multi-Cell Lighting Testbed for VLC and VLP,” Proc. 1st
    Global LiFi Congress, Paris France, February 2018.
  • M.B. Rahaim and T.D.C. Little, “Interference in IM/DD Optical Wireless Communication Networks,” in IEEE/OSA Journal of Optical Communications and Networking, vol. 9, no. 9, pp. D51-D63, Sept. 2017.
  • M.B. Rahaim and T.D.C. Little, “Optical Small Cells, RF/VLC HetNets, and Software Defined VLC,” Visible Light Communications: Theory and Applications, 1st Edition, June 2017.
  • M.B. Rahaim and T.D.C. Little, “Reconciling Approaches to SNR Analysis in Optical Wireless Communications,” Proc. IEEE WCNC 2017.
  • M.B. Rahaim and T.D.C. Little, “Ultra-Dense IoT Architecture using Hybrid CSMA with Sector Based Scheduling (CSMA/SS) via Visible Light Communications,” ACM MadCom, Proc. Intl. Conf. on Embedded Wireless Systems and Networks (EWSN), Uppsala, Sweden, Feb. 20-22, 2017.
  • M.B. Rahaim and T.D.C. Little, “Bounding SINR with the constraints of an optical wireless channel,” Proc. 2016 IEEE International Conference on Communications Workshops (ICC), Kuala Lumpur, 2016, pp. 417-422.
  • M. Ayyash, H. Elgala, A. Khreishah, V. Jungnickel, T.D.C. Little, S. Shao, M. Rahaim, D. Schulz, R. Freund, “Coexistence of WiFi and LiFi Towards 5G: Concepts, Opportunities, and Challenges,” IEEE Communications Magazine, 54(2), January 2016.
  • M.B. Rahaim and T.D.C. Little, “Integration of RF and VLC Systems,” R. Karlicek et al. (eds.) Handbook of Advanced Lighting Technology, Springer, 2016.
  • A. Aldalbahi, M.B. Rahaim, A. Khreishah, M. Ayyash, R. Ackerman, J. Basuino, W. Berreta, and T.D.C. Little,” Extending ns3 to simulate visible light communication at network-level,” 2016 23rd Intl. Conf. on Telecommunications (ICT), Thessaloniki, 2016, pp. 1-6.
  • S. Shao, A. Khreishah, M. Ayyash, M.B. Rahaim, H. Elgala, V. Jungnickel, D. Schulz, T.D.C. Little, J. Hilt, and R. Freund, “Design and Analysis of a Visible-Light-Communication Enhanced WiFi System,” Journal of Optical Communications and Networking, Vol. 7, No. 10, pp. 960-973, 2015.
  • S. Shao, A. Khreishah, M. Rahaim, H. Elgala, T.D.C. Little, and M. Ayyash, “An Indoor Hybrid WiFi-VLC Internet Access System,” in Proc. Workshop of CellulAR Traffic Offloading to Opportunistic Networks (CARTOON) Philadelphia, PA, October 2014.
  • M.B. Rahaim, T.D.C. Little, “Evaluation of Signal to Noise Ratio in Heterogeneous RF/OW Networks,” submitted to IEEE JSAC- 2014 Special Issue on Optical Wireless Communication, 2014.
  • M.B. Rahaim and T.D.C. Little, “SINR Analysis and Cell Zooming with Constant Illumination for Indoor VLC Networks,” Proc. 2nd Intl. Workshop on Wireless Optical Communications (IWOW) 2013, Northumbria University, Newcastle Upon Tyne, UK, October 21, 2013.
  • M.B. Rahaim, G.B. Prince, and T.D.C. Little, “State Estimation and Motion Tracking for Spatially Diverse VLC Networks,” Proc. 3rd IEEE Workshop on Optical Wireless Communications, Anaheim, CA, December 2012
  • M.B. Rahaim, A.M. Vegni, and T.D.C. Little, “A Hybrid Radio Frequency and Broadcast Visible Light Communication System,” Proc. IEEE Globecom 2011 2nd Workshop on Optical Wireless Communications (OWC 2011), pp. 818-822, Dec. 5-9, 2011, Houston TX, USA.

Testbed

  • T.D.C. Little, M.B. Rahaim, I. Abdalla, E. Lam, R. Mcallister, A.M. Vegni, “A Multi-Cell Lighting Testbed for VLC and VLP,” Proc. 1st
    Global LiFi Congress, Paris France, February 2018.
  • R.F. Karlicek, R. Radke, J. Li, T.D.C. Little, and P. Butala, “Sensory Lighting System,” US Patent 9,363,859, June 7, 2016.
  • A. Aldalbahi, M.B. Rahaim, A. Khreishah, M. Ayyash and T.D.C. Little, “Visible Light Communication Module: An Open Source Extension to the ns3 Network Simulator With Real System Validation,” IEEE Access, vol. 5, pp. 22144-22158, 2017.
  • H. Elgala, M. Rahaim, T.D.C. Little, A. Mirvakili, and V. Koomson, “Wireless Access Testbed through Visible Light and Dimming Control,” to appear in Proc. IEE WCNC 2015, 2015 IEEE Wireless Communications and Networking Conference (WCNC) – Track 4: Services, Applications, and Business, 2015.
  • S. Shao, A. Khreishah, M. Rahaim, H. Elgala, T.D.C. Little, and M. Ayyash, “An Indoor Hubrid WiFi-VLC Internet Access System,” in Proc. Workshop of CellulAR Traffic Offloading to Opportunistic Networks (CARTOON) Philadelphia, PA, October 2014.
  • M. Rahaim, M. Hella, A. Mirvakilli, S. Ray, V.J. Koomson, and T.D.C. Little, “Software Defined Visible Light Communication,” Proc. Wireless Innovation Forum Conference on Communications Technologies and Software Defined Radio (SDR-WinnComm 2014), April 2014.
  • T.D. C. Little and H. Elgala, “Adaptation of OFDM under Visible Light Communications and Illumination Constraints”, the Asilomar Conference on Signals, Systems, and Computers, November 2-5, 2014, CA.
  • H. Elgala and T.D.C. Little, “Reverse Polarity Optical-OFDM (RPO-OFDM): Dimming Compatible OFDM for Gigabit VLC Links,” Optics Express, Vol. 21, Issue 20, pp. 24288-24299 (2013).
  • M. Rahaim, M. Hella, A. Mirvakilli, S. Ray, V.J. Koomson,  and T.D.C. Little, “Software Defined Visible Light Communication,” Proc. Wireless Innovation Forum Conference on Communications Technologies and Software Defined Radio (SDR-WinnComm 2014), April 2014.
  • M. Rahaim, J. Carruthers, and T.D.C. Little, “Accelerated Impulse Response Calculation for Indoor Optical Communication Channels,” Proc. IEEE International Conference on Wireless Information Technology and Systems (ICWITS 2012), Maui, HI November 2012.

2011 and Previous

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  • H. Altug, D. Englund, J. Vuckovic, “Low Threshold Surface-Passivated Photonic Crystal Nanocavity Laser,” Applied Physics Letters, 91 071124 (2007).
  • H. Altug, D. Englund, I. Fushman, J. Vuckovic, “Efficient Terahertz Room-temperature Photonic Crystal Nanocavity Laser,” Applied Physics Letters 91 071126 (2007).
  • M. Ruane, “Vertically Integrated Research Experiences,” 9th International Conference on Engineering Education, San Juan, PR, July 2006.
  • H. Altug, D. Englund, J. Vuckovic, “Ultra-fast Photonic Crystal Nanocavity Laser,” Nature Physics, 2, 484-488, (2006).
  • D. Bergstein, M. F. Ruane, M. Selim Ünlü, “Silicon Substrates with Buried Distributed Bragg Reflectors for Biosensing,” 2005 International Semiconductor Device Research Symposium (ISDRS 2005) Bethesda MD. Dec. 7-9, 2005.
  • J. B. Carruthers and S. M. Carroll “Statistical Models for Indoor Optical Wireless Channels,” Special Issue of the International Journal of Communication Systems: Indoor Optical Wireless Communication Systems and Networks. Vol. 18, pages 267-284, 2005.
  • H. Altug, J. Vuckovic, “Photonic crystal nanocavity array laser,” Optics Express, 13, 8819 (2005).
  • H. Altug, J. Vuckovic, “Polarization control and sensing with two-dimensional coupled photonic crystal microcavity arrays,” Optics Letters, 30, 982 (2005).
  • H. Altug, J. Vuckovic, “Experimental demonstration of small group velocity of light in two-dimensional coupled photonic crystal microcavity arrays,” Applied Physics Letters, 86, 111102 (2005).
  • H. Altug, N. C. Helman, J. E. Roth, D. P. Bour, D. Miller, “Misalignment-Tolerant Surface-Normal Low-Voltage Modulator for Optical Interconnects,” IEEE Journal of Selected Topics in Quantum Electronics, 11, 338 (2005).

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  • D. Bergstein, M. F. Ruane, B. B. Goldberg, and M. S. Ünlü, “Resonant Cavity Imaging Biosensor,” IEEE Lightwave Technologies in Instrumentation & Measurement Conference 2004, 19-20 October 2004.
  • H. Altug, J. Vuckovic, “Two-dimensional coupled photonic crystal resonator arrays,” Applied Physics Letters, 84 161 (2004).
  • H. Altug, Mehmet F. Yanik, J. Vuckovic, “Sub-micron all-optical digital memory and integration of nano-scale photonic devices without isolators,” IEEE Journal of Lightwave Technology, 22, 2316 (2004).
  • R.P. Prasankumar, I. Hartl, J.T. Gopinath, E.P. Ippen, J.G. Fujimoto, P. Mak, M.F. Ruane, “Design and Characterization of semiconductor-doped silica film saturable absorbers”, J. Opt. Soc. Am. B., 21, no. 4, 851-857, 2004.
  • J. B. Carruthers, S. M. Carroll, and P. Kannan, “Propagation Modeling for Indoor Optical Wireless Communications using Fast Multireceiver Channel Estimation.” IEEE Optoelectronics Special Issue on Optical Wireless Communications, Vol. 150, pp. 473-481, Oct 2003.
  • J. B. Carruthers, chapter “Wireless Infrared Communications,” in Encyclopedia of Telecommunications, J. G. Proakis, editor. New York: Wiley, 2002.
  • J. B. Carruthers and J. M. Kahn, “Angle diversity for nondirected wireless infrared communication,” IEEE Transactions on Communications, vol. 48, pp. 960-969, June 2000.
  • H. Altug, B. Temelkuran, E. Ozbay, “Experimental investigation of layer-by-layer metallic photonic crystals,” IEEE Proceedings on Optoelectronics, 145, 409 (1998).
  • J. B. Carruthers and J. M. Kahn, “Modeling of nondirected wireless infrared channels,” IEEE Transactions on Communications, vol. 45, pp. 1260-1268,Oct. 1997.

Textbooks authored by the ERC Team

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