Results 31 to 40 of about 2,823 (194)
Secure Transmission for Differential Quadrature Spatial Modulation With Artificial Noise
IEEE Access, 2019 In this paper, we investigate the secure transmission for differential quadrature spatial modulation (DQSM) with artificial noise (AN) in multiple-input single-output wiretap networks, where a cooperative jammer helps the secure transmission between ...
Yong Wang +5 more
doaj +1 more source
Integrating Radio-Over-Fiber Communication System and BOTDR Sensor System
Sensors, 2020 In this paper, we propose and experimentally demonstrate for the first time, the integration of a radio-over-fiber (RoF) communication system and a Brillouin optical time-domain reflectometry (BOTDR) distributed sensor system using a single optical fiber
Wai Pang Ng +7 more
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Carrier FOE Scheme Based on FSTS in Spatial Diversity PM Coherent FSO Communication
IEEE Photonics Journal, 2023 The efficient and cost-effective suppression of atmospheric turbulence effects in free-space optical (FSO) communication poses a significant challenge.
Liqian Wang, Jichen Wang, Xinyu Tang
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Fully signed quadrature space shift keying MIMO modulation
Ain Shams Engineering JournalA novel multiple-input multiple-output (MIMO) space shift keying (SSK) modulation scheme, termed fully signed quadrature space shift keying (FSQ-SSK), is proposed in this paper.
Hany S. Hussein +4 more
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IET Communications, 2023 Visibility graph methods allow time series to mine non‐Euclidean spatial features of sequences by using graph neural network algorithms. Unlike the traditional fixed‐rule‐based univariate time series visibility graph methods, a symmetric adaptive ...
Haihai Bai +3 more
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Quadrature spatial modulation based multiuser MIMO transmission system [PDF]
IET Communications, 2020 This study presents a multiuser (MU) multiple‐input multiple‐output (MIMO) downlink transmission scheme based on the quadrature spatial modulation (QSM) concept, which uses the indices of the non‐zero entries in its transmission vector to modulate and transmit an independent sequence of bits for each user in the system.
Francisco Rubén Castillo Soria +3 more
openaire +2 more sources
Optical Windows for Transcranial Brain Imaging in Living Mice: Skull Thinning, Clearing, and Beyond
Advanced Science, EarlyView.Longitudinal, noninvasive in vivo imaging is crucial for studying brain physiology. Advances in transcranial optical windows and multiphoton microscopy have improved imaging depth, but their performance often deteriorates over time. This work investigated various transcranial window approaches and found that skull regrowth limits image quality.
Yiming Fu +5 more
wiley +1 more source
Advanced Science, EarlyView.A self‐powered phase‐encoding sensing paradigm enables direct motion‐to‐time information conversion, providing a compact and autonomous strategy for high resolution angular displacement measurement. ABSTRACT In modern manufacturing and engineering, angular displacement sensors are crucial for motion control and feedback systems in Electromechanical ...
Shuxian Wang +3 more
wiley +1 more source
Parallel Quadrature Spatial Modulation for Massive MIMO Systems With ICI Avoidance
IEEE Access, 2019 Despite its efficiency in conventional multiple-input multiple-output (MIMO) wireless systems, quadrature spatial modulation (QSM) becomes less efficient in massive MIMO systems since it does not adapt to the number of antennas but always uses one or two
Guosheng Huang +3 more
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Advanced Science, EarlyView.The concept of high‐dimensional EM modulation using the STMA for physical layer secure communication is illustrated in figure. The STMA consists of a series of programmable unit cells, with 1‐bit reconfigurable phase states (0/π). The STMA is excited by a monochromatic continuous wave (CW) at frequency fc and controlled by a field‐programmable gate ...
Xinyu Fang +6 more
wiley +1 more source