1. Expand the setup to 4x4 s-MIMO Incorporate FPGAs at the transmitter and receiver to demonstrate high speed wireless VLC link Install the setup in VLC + adaptive lighting testbed to demonstrate illumination, control and VLC in an integrated system Investigate wavelength division multiplexing (λ-MIMO) VLC system and optimize for different use cases Investigate wavelength division spatial multiplexing (hybrid-MIMO) and optimize Develop/Acquire color tunable luminaire capable of high speed modulation Develop specifications for multicolored imaging receiver Demonstrate SOA and proof of concepts : Radiant flux output from transmitter j Free Space Gain Optics Gain Image Magnification Image Gain Aggregate Channel Gain Received Signal Power is combining algorithm Pankil Butala, Jimmy Chau, Hany Elgala and Prof. Thomas D. C. Little 1 Sagar Ray, Ethan Spitz and Prof. Mona Hella 2 Ali Mirvakili and Prof. Valencia Koomson 3 1 Boston University, 2 Rensselaer Polytechnic Institute, 3 Tufts University Project’s ERC Role Relevant Research Societal Benefits Acknowledgements This work is supported by the NSF under cooperative agreement EEC-0812056 and by New York State under NYSTAR contract C090145. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Indoor Diffuse Optical MIMO Communication System Develop system to service high speed wireless data access along with controllable indoor space illumination Project Goals T1.2.3 Efficiency: Automated, controllable illumination leads to efficient use of electrical power and thus large energy savings Health: Controllable illumination and higher data rates enable smart room services that can monitor and improve health Productivity: Higher wireless data bandwidths can enable new sophisticated real time applications that can improve productivity Future Work Research Results Light Flow Modeling Human Factors & Interfaces Adaptive Sampling & Control Modeling Communications Testbed -Lighting Industries -Health Care Industries -Communications Industries -Prototypes -Design Standards -Integration Protocols STAKEHOLDERS Advanced LuminairesBiochemical Sensors Communication Transceiver & Protocol Efficient Full Spectrum Lighting Display Illumination Fusion Healthy Room Data Room BARRIERS - System Cost - Lighting Designer acceptance - Light/RF Wireless standards integration - Clinical Impacts BARRIERS - Color and intensity uniformity maintenance - Stray light impact on sensor SNR - Lack of source/sensor communications protocols -Biochem-identification & discrimination Biochemical Sensing Testbed Adaptive Lighting Testbed Communications Testbed BARRIERS - Inefficient LEDs (except Blue) - Limited bandwidth of sources - Lack of color discriminating sensors - Lack of monolithic optoelectronic integration Technology Integration Technology Base Opto Electronic Device Design Nano LED Technology Photonic Crystal Optics Color-selective High Speed Sensors III-Nitride Epitaxy High Efficiency Phosphors Plasmonic Structures Knowledge Base Level 3: Systems Level 2: Enabling Technologies Level 1: Fundamental Knowledge SYSTEM REQUIREMENTS Technology Elements Fundamental Insights System Performance Feedback Subsystems & Protocols Performance Feedback Materials & Devices Products & OutcomesRequirements High data rates achieved using Multi- Input, Multi-Output (MIMO) communication techniques Illumination control is achieved using multicolor luminaires MIMO System Block Diagram Interact with adaptive lighting testbed to engineer a shared illumination + communication system Interact with high speed drivers and advanced luminaires group to engineer high speed color controllable luminaires for system Interact with advanced sensors group to engineer high speed receivers for system Project area (highlighted) in the 3 plane diagram Zeng et al, “High data rate MIMO optical wireless communications using white led lighting”, Selected areas in communications, IEEE Journal on, 2009 6x6 transmitter array 0.4W per transmitter 12x12 (5.91cm x 5.91cm) detector array OOK-NRZ, BER < 10 -6 Equalized White Channel Data Rate = 1080 Mbps Multicolored Luminaires Multicolored Imaging Receiver Hybrid MIMO Channel Spot Pixel Transmitter Imaging Optics Imaging Sensor Sketch: Spatial Division Multiplexing MIMO VLC System a) System setup at Boston University b) Tufts Transmitter c) RPI Receiver d) 2x2 channels as seen on oscilloscope a b c d Channel de-correlation experiment: a) Block signal output from each transmitter one at a time b) Lose signal from transmitter 1 c) Lose signal from transmitter 2 a b c Sketch: Hybrid MIMO VLC System