Results 31 to 40 of about 1,219,269 (316)

Adaptive frequency-domain equalization for single-carrier MIMO systems [PDF]

, 2004
Channel estimation and tracking pose real problems in wideband single-carrier wireless communication systems employing multiple transmit and receive antennas. An alternative to estimating the channel is to adaptively equalize the received symbols.
Coon, J, M. Beach, J. McGeehan, S. Armour, J. Coon, McGeehan, JP, Beach, MA, Armour, SMD   +7 more
core   +1 more source

Towards phase-stabilized Fourier domain mode-locked frequency combs

Communications 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, Torben Blömker, Mark Schmidt, Dominic Kastner, Tom Pfeiffer, Jan Philip Kolb, Wolfgang Draxinger, Sebastian Karpf, Christian Jirauschek, Robert Huber   +9 more
doaj   +1 more source

Vector fitting realisation of exact time domain modal nonreflecting boundary condition [PDF]

, 2010
To employ the modal nonreflecting boundary condition (MNRBC) in cylindrical coordinates in the finite element time domain (FETD) method, a time domain kernel expression must be found that it is the inverse Laplace transform (ILT) of a known frequency ...
Bavelis, Konstantinos, Mias, Christos
core   +1 more source

Multiplexing a serial array of tapered optical fibre sensors using coherent optical frequency domain reflectometry [PDF]

, 2012
The use of high spatial resolution optical frequency domain reflectometry (OFDR) to facilitate the multiplexing of a serial array of tapered optical fibre sensors is presented.
Tatam, Ralph P., Chehura, Edmon, James, Stephen W., Jarzebinska, Renata   +3 more
core   +1 more source

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

EURASIP 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, Xiumei Li, Junmei Sun, Huang Bai   +3 more
doaj   +1 more source

Robust Audio Watermarks in Frequency Domain

Journal 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

Frequency Domain Diagnostics of Transformer Insulation

Приборы 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, M. Šebok, D. Korenčiak, P. Brnčal, M. Kubiš, P. Żukowski, T. N. Koltunowicz   +6 more
doaj   +1 more source

Frequency Domain Repercussions of Instantaneous Granger Causality

Entropy, 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

Adaptive SVD Denoising in Time Domain and Frequency Domain

Applied Sciences
In seismic data processing, noise not only affects velocity analysis and seismic migration, but also causes potential risks in post-stack processing because of the artifacts.
Meixuan Ren, Enli Zhang, Qiang Kang, Long Chen, Min Zhang, Lei Gao   +5 more
doaj   +1 more source

Side-channel analysis in frequency domain with clustering

Dianzi 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, Yan Yingjian, Zhu Chunsheng, Guo Pengfei   +3 more
doaj   +1 more source