Results 21 to 30 of about 46,791 (149)

IM/DD-Based 112-Gb/s/lambda PAM-4 Transmission Using 18-Gbps DML

IEEE Photonics Journal, 2016
Single-channel 112-Gb/s PAM-4 transmission based on low-cost intensity modulation and direct detection (IM/DD) optics is experimentally demonstrated over 1-km standard single-mode fiber.
Chao Yang, Rong Hu, Ming Luo, Qi Yang, Cai Li, Haibo Li, Shaohua Yu   +6 more
doaj   +1 more source

Cascaded Kalman filter for target tracking in automotive radar

The Journal of Engineering, 2019
In automotive anti-collision radar system, the accuracy of velocity is one of the key indicators to measure radar performance. For frequency modulation continuous wave radar with chirp sequence, which is commonly used in automotive radar, there are two ...
Yang Li, Can Liang, Man Lu, Xueyao Hu, Yanhua Wang   +4 more
doaj   +1 more source

Jittered chirp sequence waveform in combination with CS‐based unambiguous Doppler processing for automotive frequency‐modulated continuous wave radar

IET Radar, Sonar & Navigation, 2017
The chirp sequence waveform is one of the most commonly used waveforms for automotive frequency‐modulated continuous wave radars. When a chirp sequence waveform is applied, the range–Doppler processing method based on two‐dimensional fast Fourier transform can be used to extract the range and velocity parameters of multiple targets from the beat ...
Yuankai Wang, Zelong Xiao, Li Wu, Jianzhong Xu, Huichang Zhao   +4 more
openaire   +2 more sources

A computational model of auditory chirp-velocity sensitivity and amplitude-modulation tuning in inferior colliculus neurons. [PDF]

J Comput Neurosci
We demonstrate a model of chirp-velocity sensitivity in the inferior colliculus (IC) that retains the tuning to amplitude modulation (AM) that was established in earlier models. The mechanism of velocity sensitivity is sequence detection by octopus cells
Mitchell PW, Carney LH.
europepmc   +3 more sources

Impact of an Automotive Chirp-Sequence Interferer on a Wideband OFDM Radar

European Radar Conference, 2018
OFDM-based radar schemes are promising candidates to solve inherent limitations of frequency-modulated schemes. However, for a practical implementation in the automotive environment with an increasing amount of sensors and disturbances, not only the ...
Christina Knill, B. Schweizer, Philipp Hügler, C. Waldschmidt   +3 more
semanticscholar   +1 more source

Time-Resolved Mechanical Spectroscopy of Soft Materials via Optimally Windowed Chirps

Physical Review X, 2018
The ability to measure the bulk dynamic behavior of soft materials with combined time and frequency resolution is instrumental for improving our fundamental understanding of connections between the microstructural dynamics and the macroscopic mechanical ...
Michela Geri, Bavand Keshavarz, Thibaut Divoux, Christian Clasen, Daniel J. Curtis, Gareth H. McKinley   +5 more
doaj   +1 more source

A Kinetic–Energetic Bottleneck of Charge‐Transfer Injection Governs Energy Loss in Organic Solar Cells

Advanced Energy Materials, EarlyView.
Kinetic–energetic projection of time‐resolved photoluminescence reveals that charge‐transfer injection acts as a universal bottleneck in organic solar cells. A physics‐constrained Bayesian framework identifies an emergent effective CT injection rate governing the trade‐off between charge generation and nonradiative energy loss.
Rong Wang, Tobias Osterrieder, Atul Shukla, Christos L. Chochos, Vasilis G. Gregoriou, Yakun He, Hua Tang, Julian Matthias Haffner‐Schirmer, Karen Forberich, Ning Li, Thomas Heumueller, Frédéric Laquai, Jens Hauch, Safa Shoaee, Dieter Neher, Larry Lüer, Christoph J. Brabec   +16 more
wiley   +1 more source

Ultrasonic Rainbow: A Meta‐Transducer for Frequency‐Selective Elastic Wave Control via Dithering‐Based Wavenumber Tuning

Advanced Intelligent Systems, EarlyView.
A piezoelectric meta‐transducer generates an ultrasonic rainbow, steering guided elastic waves to different angles according to frequency. A dithering‐based binary electrode design enables a closer realization of the target wavenumber filter, improving directional purity and suppressing unwanted lobes. Numerical and experimental validation demonstrates
Masoud Mohammadgholiha, Jochen Moll, Kilian Tschöke, Carsten Kruska, Sylvia E. Gebhardt, Luca De Marchi   +5 more
wiley   +1 more source

Review of millimeter‐wave and terahertz near‐field synthetic aperture radar imaging technology

InfoScience, EarlyView.
Abstract This paper comprehensively reviews the development of millimeter‐wave (MMW) and terahertz (THz) near‐field imaging technologies, with an emphasis on the state of synthetic aperture radar (SAR)‐based imaging technologies. Near‐field imaging technologies are categorized into passive and active imaging modes, among which active imaging is favored
Qi Yang, Hongqiang Wang, Xu Chen, Xin Peng   +3 more
wiley   +1 more source

Optical Kerr Gating as a Strategy for Noise Reduction in Femtosecond Stimulated Raman Spectroscopy

Journal of Raman Spectroscopy, EarlyView.
We report an experimental approach, where an Optical Kerr gate is incorporated with Femtosecond Stimulated Raman Spectrometry (FSRS). The gate functions as a temporal filter that preferentially suppresses the FSRS inherent background. FSRS spectra are reported with the Kerr‐gated methodology with significantly improved SNR compared to the conventional ...
Spyridon Kaziannis, Lazaros Varvarezos, Sotiris Danakas, Elissavet Karkadaki, Cesar Bernando, Miroslav Kloz   +5 more
wiley   +1 more source