Results 31 to 40 of about 26,636 (252)
IET Radar, Sonar & Navigation, 2023 Currently, single‐frequency Global Navigation Satellite System (GNSS) receivers dominate maritime navigation units due to their simple structure and low cost but usually cannot meet the positioning requirements of Maritime Autonomous Surface Ship (MASS).
Yi Jiang, Han Shao, Heng Gao
doaj +1 more source
SC-FDMA as a Delay-Doppler Domain Modulation Technique
2024 IEEE International Conference on Communications Workshops (ICC Workshops)This paper compares orthogonal time frequency space (OTFS) modulation and single-carrier frequency division multiple access (SC-FDMA). It shows that these are equivalent except for a set of linear phase shifts, applied to the transmit/receive data symbols, which can be absorbed into the channel.
Arman Farhang, Mohsen Bayat
openaire +3 more sources
On the global attractor of delay differential equations with unimodal feedback
, 2009 We give bounds for the global attractor of the delay differential equation x(over dot) (t) = -mu x(t) + f(x(t - tau)), where f is unimodal and has negative Schwarzian derivative.
Liz, Eduardo +3 more
core +1 more source
Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine
Advanced Materials, EarlyView.A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen +5 more
wiley +1 more source
Optimized Multiplicative Pre-Distortion PAPR Reduction Scheme for OTFS Signals
IEEE AccessWe present an iterative peak-to-average power ratio (PAPR) reduction scheme with multiplicative pre-distortion vectors for orthogonal time frequency space (OTFS) systems by making a compromise between the PAPR reduction and the bit error rate (BER ...
Feiyang Liu +2 more
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The Orthogonal Time Frequency Space (OTFS) Technique In 6G Wireless Communications [PDF]
BIO Web of ConferencesThe orthogonal time-frequency space (OTFS) technique is a potential waveform modulation method that modulates data in the delaydoppler (DD) domain. OTFS differs from traditional multiplexing techniques by utilizing two-dimensional modulation to switch ...
Ramadhan Ali J., TaeiZadeh Ali
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Advanced Materials, EarlyView.This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau +9 more
wiley +1 more source
Discrete radar based on modulo arithmetic
EURASIP Journal on Advances in Signal ProcessingZak-OTFS is a modulation scheme where signals are formed in the delay–Doppler (DD) domain, converted to the time domain (DD) for transmission and reception, then returned to the DD domain for processing.
Nishant Mehrotra +4 more
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Joint Doppler shift and time delay estimation by deconvolution of generalized matched filter
EURASIP Journal on Advances in Signal Processing, 2021 Resolution probability is the most important indicator for signal parameter estimator, including estimating time delay, and joint Doppler shift and time delay.
Xuan Li, Xiaochuan Ma
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Hamming Distance Optimized Underwater Acoustic OTFS-IM Systems
Entropy, 2023 The orthogonal time frequency space (OTFS) modulation technique can provide reliable communication in time-varying channels. Due to the dispersive characteristics of underwater acoustic channels, this paper proposes an OTFS-IM underwater acoustic ...
Xiaopeng Guo +4 more
doaj +1 more source