A5114929618- Optical Network Technologies
- Optical Wireless Communication Technologies
- Advanced Photonic Communication Systems
- Advanced Optical Network Technologies
- Wireless Communication Security Techniques
- Ocular and Laser Science Research
- Semiconductor Lasers and Optical Devices
- Advanced MIMO Systems Optimization
- Microwave Engineering and Waveguides
- Advanced Wireless Communication Technologies
- Advanced Antenna and Metasurface Technologies
- Advanced Wireless Communication Techniques
- Robotic Path Planning Algorithms
- Advanced Wireless Network Optimization
- Robotic Locomotion and Control
- Control and Dynamics of Mobile Robots
- Electromagnetic Compatibility and Noise Suppression
McMaster University
2024-2025
University of British Columbia
2019-2022
King Abdullah University of Science and Technology
2017-2020
Harbin Engineering University
2010
Institute for Infocomm Research
2005
National University of Singapore
2005
A demonstration of ultraviolet-B (UVB) communication link is implemented utilizing quadrature amplitude modulation (QAM) orthogonal frequency-division multiplexing (OFDM).The based on a 294-nm UVB-light-emitting-diode (UVB-LED) with full-width at half-maximum (FWHM) 9 nm and light output power 190 μW, 7 V, special silica gel lens top it.A -3-dB bandwidth 29 MHz was measured high-speed near-solar-blind data rate 71 Mbit/s achieved using 8-QAM-OFDM perfect alignment.23.6 2-QAM-OFDM when the...
In Visible Light Communications (VLC) with multiple transmitters sending information to receivers simultaneously, the optical signals interfere due diffused light. The result is an Intensity-Modulation/Direct-Detection (IM/DD) Interference Channel (IC), whose capacity has not been investigated. challenge in studying of IM/DD IC its non-negative inputs mean power constraints on one hand, and interference other hand. this paper studied. Capacity inner outer bounds are derived evaluated. based...
This paper studies the capacity of two-user intensity-modulation/direct-detection (IM/DD) interference channel (IC), which is relevant in context multi-user optical wireless communications. Despite some known single-letter characterizations for general discrete-memoryless ICs, a computable expression IM/DD IC missing. In this paper, we provide tight and easily inner outer bounds under peak average intensity constraints. The enable characterizing asymptotic sum-rate strong weak regimes, as...
Visible light communication (VLC) systems leverage illumination devices, such as light-emitting diodes (LEDs), to serve a dual role indoor high-speed downlinks. Though high data rates are possible using orthogonal frequency-division (OFDM) in VLC systems, the impact on complexity and luminous efficacy of luminaire remain among key challenges. In this paper, <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">square-wave spatial optical OFDM</i>...
A general approach to the kinematics modeling and analyses of articulated all-terrain rovers traversing uneven terrain is describes in this paper. In addition, caster camber are taken into consideration. Based on a four wheel rover, model derived for full 6 DOF motion, enabling movements the, directions, as well rotations pitch, roll yaw. Differential individual motions contract with terrain. Then, resulting equation single motion form composite rover motion. Navigation actuation given....
Abstract Parallel coupled‐line bandpass filters using the ground‐aperture technique are analyzed in this paper. A design guide and curves for kind of filter on commonly used high‐ low‐permittivity substrates presented. Based proposed curves, two sample bandpass‐filter configurations designed. The is simulated Ansoft HFSS validated by measurements. Good agreement between measured responses obtained. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 237–240, 2005; Published online...
Optical orthogonal frequency division multiplexing (O-OFDM) schemes are variations of OFDM which produce non-negative signals. Asymmetrically-clipped O-OFDM (ACO-OFDM) is a single-layer scheme, whose spectral efficiency can be enhanced by adopting multiple ACO-OFDM layers or combination and other schemes. However, since symbol detection in such (eACO-OFDM) done iteratively, erroneous leads to residual clipping noise (RCN) degrade performance practice. Thus, it important develop an accurate...
Optical orthogonal frequency division multiplexing (O-OFDM) schemes are variations of OFDM which produce non-negative signals. Asymmetrically-clipped O-OFDM (ACO-OFDM) is a single-layer scheme, whose spectral efficiency can be enhanced by adopting multiple ACO-OFDM layers or combination and other schemes. However, since symbol detection in such (eACO-OFDM) done iteratively, erroneous leads to residual clipping noise (RCN) degrade performance practice. Thus, it important develop an accurate...
Optical orthogonal frequency division multiplexing (O-OFDM) schemes are variations of OFDM which produce non-negative signals. Asymmetrically-clipped O-OFDM (ACO-OFDM) is a single-layer scheme, whose spectral efficiency can be enhanced by adopting multiple ACO-OFDM layers or combination and other schemes. However, since symbol detection in such (eACO-OFDM) done iteratively, erroneous leads to residual clipping noise (RCN) degrade performance practice. Thus, it important develop an accurate...
<p>This paper studies the capacity of two-user intensity-modulation/direct-detection (IM/DD) interference channel (IC), which is relevant in context multi-user optical wireless communications. Despite some known single-letter characterizations for general discrete-memoryless ICs, a computable expression IM/DD IC missing. In this paper, we provide tight and easily inner outer bounds under peak average intensity constraints. The enable characterizing asymptotic sum-rate strong weak...
In optical wireless communications, a broadcast channel (BC) employing intensity modulation and direct detection (IM/DD) is often modeled as peak-constrained BC. A closed-form expression for its capacity region of the BC not known. This paper presents an analytical inner bound Gaussian achieved by class discrete input distribution, specifically, evenly-spaced uniform distribution (ESDU). contrast to continuous that provides benchmark, ESDU more promising in application channels. The newly...