Results 171 to 180 of about 107,562 (201)
Some of the next articles are maybe not open access.
Evaluation of waveform, latency and amplitude values of chirp ABR in newborns
International Journal of Pediatric Otorhinolaryngology, 2014There has been a rapid growth in using chirp stimuli for evoking auditory brainstem response (ABR). This study aims to investigate the waveform morphology, latency, and amplitude values in newborns and compare them with those evoked by the click in order to determine whether chirp-evoked responses are easier to detect at near-threshold values, as has ...
Mario, Cebulla +2 more
openaire +2 more sources
Waveform Coherence and Chirp Propagation
GW-P05 investigates whether a controlled, time-evolving chirped waveform can propagate through a one-dimensional nearest-neighbour phase-reorganisation chain while preserving measurable phase evolution, frequency progression, coherent packet structure, finite propagation delay and accountable energy transport.openaire +1 more source
LPI waveform shaping by modified chirp filter
MILCOM 92 Conference Record, 2003A computer simulation has shown that a modified chirp filter with odd phase symmetry can suppress the line spectrum produced by a binary phase shift keying (BPSK) signal at the output of a squaring circuit (SC) by destroying the cyclostationarity of the signal.
openaire +1 more source
First Demonstration of Airborne SAR With Nonlinear FM Chirp Waveforms
IEEE Geoscience and Remote Sensing Letters, 2016For synthetic aperture radar (SAR), a system impulse response with low sidelobes is very important because sidelobes may interfere with the nearby scatterers and contribute to multiplicative noise. It is well known that a nonlinear frequency-modulation (NLFM) chirp waveform can shape the signal's power spectral density and provide a radar matched ...
Wei Wang 0091 +6 more
openaire +1 more source
MIMO OFDM chirp waveform design with spread spectrum modulation
2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP), 2014This paper proposes an approach to design orthogonal multiplexing waveform for use of Multiple-input Multiple-output (MIMO) radar. The designed scheme incorporate direct sequence spread spectrum (DSSS) coding techniques on orthogonal frequency division multiplexing (OFDM) chirp signaling.
Sheng-juan Cheng +2 more
openaire +1 more source
An improved OFDM chirp waveform used for MIMO SAR system
Science China Information Sciences, 2014zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jie Wang 0018 +5 more
openaire +3 more sources
A double exponential chirp waveform for noisy rheology
Rheologica ActaIn the search for faster rheometrical measurements techniques for fast time-evolving systems, optimally windowed chirps (OWCh) have recently been proposed for the determination of the complex modulus. However, such chirps are prone to artefacts at high frequencies due to fact that the input power is distributed over a range of frequencies leading to ...
Jarno L. Waeterloos +2 more
openaire +2 more sources
Design of Chirp Waveforms for Multiple-Access Ultrasonic Indoor Positioning
IEEE Sensors Journal, 2018In ultrasonic positioning systems (UPSs) chirp waveforms have attracted much attention due to its high range resolution. However, the multiple-access schemes for the chirp-based UPS are limited. In its application to multiple-access ultrasonic positioning, effective waveform diversity design is a prerequisite. In a multiple-access UPS, each transmitter
Mohammad Omar Khyam +5 more
openaire +3 more sources
OFDM Chirp Waveform Design for Clutter Suppression
2021 CIE International Conference on Radar (Radar), 2021Mingyue Ding +4 more
openaire +1 more source
IEEE Transactions on Geoscience and Remote Sensing, 2022
Mengdao Xing, Yachao Li, Pingping Huang
exaly
Mengdao Xing, Yachao Li, Pingping Huang
exaly