Results 31 to 40 of about 2,712,302 (296)

Blind Receiver Design for OFDM Systems Over Doubly Selective Channels [PDF]

open access: yes, 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

A channel estimation algorithm for MIMO-SCFDE [PDF]

open access: yes, 2004
This letter proposes a novel method for channel stimation in a single-carrier multiple input-multiple output (MIMO) system with frequency-domain equalization/detection.
Armour, SMD   +6 more
core   +2 more sources

Towards phase-stabilized Fourier domain mode-locked frequency combs

open access: yesCommunications Physics, 2022
Fourier domain mode-locked lasers provide coherent, wavelength swept light useful for imaging applications, but the phase relation between frequencies is not understood.
Christin Grill   +9 more
doaj   +1 more source

Frequency-Domain Analysis of Linear Time-Periodic Systems [PDF]

open access: yes, 2004
In this paper, we study convergence of truncated representations of the frequency-response operator of a linear time-periodic system. The frequency-response operator is frequently called the harmonic transfer function. We introduce the concepts of input,
Bernhardsson, Bo   +2 more
core   +1 more source

Robust Audio Watermarks in Frequency Domain

open access: yesJournal of Telecommunications and Information Technology, 2014
In this paper an audio watermarking technique is presented, using log-spectrum, dirty paper codes and LDPC for watermark embedding. This technique may be used as a digital communication channel, transmitting data at about 40 b/s.
Przemysław Dymarski, Robert Markiewicz
doaj   +1 more source

WDIG: a wavelet domain image generation framework based on frequency domain optimization

open access: yesEURASIP Journal on Advances in Signal Processing, 2023
In the end-to-end image generation task, the spatial domain of pixel space cannot explicitly separate the low-frequency general information such as texture and color from the high-frequency detail information such as structure and identity.
Qing Zhu   +3 more
doaj   +1 more source

Frequency Domain Repercussions of Instantaneous Granger Causality

open access: yesEntropy, 2021
Using directed transfer function (DTF) and partial directed coherence (PDC) in the information version, this paper extends the theoretical framework to incorporate the instantaneous Granger causality (iGC) frequency domain description into a single ...
Luiz A. Baccalá, Koichi Sameshima
doaj   +1 more source

Side-channel analysis in frequency domain with clustering

open access: yesDianzi Jishu Yingyong, 2021
The alignment of power traces is one of the key factors affecting the success of side-channel analysis. Frequency-domain side-channel analysis can effectively solve the alignment of power traces in the time domain.
Cai Juesong   +3 more
doaj   +1 more source

Large electric-field induced strain in BiFeO3 ceramics [PDF]

open access: yes, 2011
Large bipolar strain of up to 0.36% (peak-to-peak value) was measured in BiFeO3 ceramics at low frequency (0.1 Hz) and large amplitude (140 kV/cm) of the driving field.
Baek   +29 more
core   +2 more sources

Frequency Domain Diagnostics of Transformer Insulation

open access: yesПриборы и методы измерений, 2019
The first part of paper deals with the base information about diagnostics of power transformers. In this part are presented differently insulating methods, for example method of recovery voltage method, method of polarization and depolarization currents ...
M. Gutten   +6 more
doaj   +1 more source

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