Results 41 to 50 of about 50,977 (262)
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
Blind Receiver Design for OFDM Systems Over Doubly Selective Channels [PDF]
, 2007 We develop blind data detectors for orthogonal frequency-division multiplexing (OFDM) systems over doubly selective channels by exploiting both frequency-domain and time-domain correlations of the received signal. We thus derive two blind data detectors:
Cui, Tao, Tellambura, Chintha
core +1 more source
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
doaj +1 more source
Low-Complexity Iterative Detection for Orthogonal Time Frequency Space Modulation
, 2017 We elaborate on the recently proposed orthogonal time frequency space (OTFS) modulation technique, which provides significant advantages over orthogonal frequency division multiplexing (OFDM) in Doppler channels.
Hong, Yi +4 more
core +1 more source
Electric field representation of pulsar intensity spectra [PDF]
, 2005 Pulsar dynamic spectra exhibit high visibility fringes arising from interference between scattered radio waves. These fringes may be random or highly ordered patterns, depending on the nature of the scattering or refraction.
Bignall +25 more
core +3 more sources
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
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
doaj +1 more source
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
doaj +1 more source
Analysis of the Local Quasi-Stationarity of Measured Dual-Polarized MIMO Channels
, 2014 It is common practice in wireless communications to assume strict or wide-sense stationarity of the wireless channel in time and frequency. While this approximation has some physical justification, it is only valid inside certain time-frequency regions ...
Ascheid, Gerd +3 more
core +1 more source
Compressed Sensing Channel Estimation for OTFS Modulation in Non-Integer Delay-Doppler Domain [PDF]
2021 IEEE Global Communications Conference (GLOBECOM), 2021 This is the author's self-archive preprint of a paper accepted in IEEE GLOBECOM ...
openaire +2 more sources