Probabilistically Shaped 16QAM Signal Transmission in a Photonics-aided Wireless Terahertz-Wave System

2018 ◽  
Author(s):  
Kaihui Wang ◽  
Xinying Li ◽  
Miao Kong ◽  
Pengqi Gou ◽  
Wen Zhou ◽  
...  
Keyword(s):  
Signal Transmission ◽  
Terahertz Wave ◽  
Wave System

scholarly journals Polar Coded OFDM Signal Transmission at the W-Band in Millimeter-Wave System

2019 ◽  
Vol 11 (6) ◽  
pp. 1-6 ◽  
Author(s):  
Li Zhao ◽  
You-Wei Chen ◽  
Wen Zhou ◽  
Run-Kai Shiu ◽  
Shuyi Shen ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Signal Transmission ◽  
Wave System ◽  
W Band ◽  
Ofdm Signal ◽  
Coded Ofdm

scholarly journals Flexible Broadband Terahertz Modulation Based on Strain-Sensitive MXene Material

2021 ◽  
Vol 9 ◽  
Author(s):  
Yangqi Liu ◽  
Xiang Li ◽  
Tingting Yang ◽  
Jingyu Liu ◽  
Bin Liu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Time Domain ◽  
Experimental Testing ◽  
Signal Transmission ◽  
Electrical Characterization ◽  
Terahertz Wave ◽  
Broadband Spectrum ◽  
The Time Domain ◽  
External Forces ◽  
Broadband Terahertz

A flexible broadband terahertz modulator based on a strain-sensitive MXene material is reported. MXene is shown to have high terahertz wave absorption through experimental testing of various substrate samples. Results show that the THz signal transmission increases with increasing stretching degree, which differs obviously from transmission through pure PVAc substrates. Analysis of the terahertz time-domain spectrum and electrical characterization indicate that the sample’s conductivity decreases with increasing stretching degree. The trend and magnitude of the electrical conductivity results are also very similar to those from the time-domain spectrum. MXene is shown to be a simple, efficient terahertz broadband spectrum modulator with transmittance that can be affected by applying external forces.

Incommensurate modulated phases of the NbxTa1-xTe4 charge density wave system

1992 ◽  
Vol 50 (1) ◽  
pp. 58-59
Author(s):  
S. Ritchie ◽  
J. C. Bennett ◽  
A. Prodan ◽  
F.W. Boswell ◽  
J.M. Corbett
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Direct Evidence ◽  
Density Wave ◽  
Wave System ◽  
Modulated Phases ◽  
Metal Atoms ◽  
Incommensurate Modulation ◽  
End Members ◽  
Modulation Wave Vector

A continuous sequence of compounds having composition NbxTa1-xTe4; 0 ≤ x ≤ 1 have been studied by electron diffraction and microscopy. Previous studies have shown that the end members of the series, TaTε4 and NbTε4 possess a quasi-one-dimensional character and exhibit charge density wave (CDW) distortions. In these compounds, the subcell structure is tetragonal with axes (a × a × c) and consists of the metal atoms (Nb or Ta) centered within an extended antiprismatic cage of Te atoms. At room temperature, TaTε4 has a commensurate modulation structure with a 2a × 2a × 3c unit cell. In NbTε4, an incommensurate modulation with × ∼ 16c axes is observed. Preliminary studies of the mixed compounds NbxTα1-xTε4 showed a discontinuous jump of the modulation wave vector commensurate to incommensurate when the Nb dopant concentration x, exceeded x ≃ 0.3, In this paper, the nature of the compositional dependence of is studied in greater detail and evidence is presented for a stepwise variation of . This constitutes the first direct evidence for a Devil's staircase in CDW materials.

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