Single-shot measurement of the free-space time domain terahertz (THz) waveforms by iterative frequency-domain interferometry technology

2019 ◽  
Vol 51 (10) ◽  
Author(s):  
Yupeng Fan ◽  
Junjun Xiao ◽  
Yi Li
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Free Space ◽  
Space Time ◽  
Single Shot

Complex Permittivity and Thickness Evaluation of Low-Loss Dielectrics From Uncalibrated Free-Space Time-Domain Measurements

2021 ◽  
pp. 1-10
Author(s):  
Ugur Cem Hasar ◽  
Yunus Kaya ◽  
Hamdullah Ozturk ◽  
Mucahit Izginli ◽  
Joaquim Jose Barroso ◽  
...  
Keyword(s):  
Time Domain ◽  
Complex Permittivity ◽  
Free Space ◽  
Space Time ◽  
Low Loss ◽  
Thickness Evaluation

Channel Estimating Based on Space-Time-Frequency Pilot for MIMO-OFDM

2012 ◽  
Vol 429 ◽  
pp. 179-185
Author(s):  
Hui Liu ◽  
Jing Shan Jiao ◽  
Fu Chun Zhang ◽  
Ling Zhou
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Space Time ◽  
Three Dimensions ◽  
Space Domain ◽  
Time Frequency ◽  
Time Space ◽  
Mimo Ofdm ◽  
The Time Domain ◽  
Inverse Operation

The pilots that are transmitted by different transmitting antennas must be orthogonal after being shifted. So the time domain channel estimating solution is deduced through LS based on the MIMO-OFDM channel estimating model. The time domain solution need the inverse operation of matrix, and its operating quantity is large. So the three dimensions pilot based on space domain, time domain and frequency domain is designed. The method need not the inverse operation of matrix for the time domain channel estimating solution and can reduce the complexity of channel estimating and make the channel estimating error minimum. It is shown from the simulation that the channel estimating method of this paper based on space domain, time space and frequency domain pilot has better MSE and BER performances compared with the traditional LS algorithm and the document algorithm.

scholarly journals Millimeter-Wave Dielectric-Constant Measurement of Alumina by Free-Space Time-Domain Method.

2002 ◽  
Vol 49 (10) ◽  
pp. 895-899
Author(s):  
Saburo Sano ◽  
Akihiro Tsuzuki ◽  
Akihiro Gotou ◽  
Takashi Yoshioka ◽  
Yukio Makino ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Millimeter Wave ◽  
Time Domain ◽  
Free Space ◽  
Space Time ◽  
Time Domain Method ◽  
Domain Method ◽  
Constant Measurement ◽  
Dielectric Constant Measurement

scholarly journals A hybrid method combining the TD-MoM with the TD-UTD to calculate the transient radiation of thin dipoles in presence of a perfectly conducting screen

2005 ◽  
Vol 3 ◽  
pp. 431-436
Author(s):  
A. Becker ◽  
V. Hansen
Keyword(s):  
Frequency Domain ◽  
Method Of Moments ◽  
Hybrid Method ◽  
Time Domain ◽  
Free Space ◽  
Time Domain Method ◽  
Thin Wire ◽  
Uniform Theory Of Diffraction ◽  
The Time Domain ◽  
Conducting Screen

Abstract. A time domain Method of Moments algorithm (TD-MoM) is combined with the time domain version of the Uniform Theory of Diffraction (TD-UTD). By use of the TD-MoM the fields radiated from thin wire structures positioned in free space are determined. The TD-UTD is applied to calculate the fields scattered by a perfectly conducting screen. Both techniques are hybridized by adding possible reflected and diffracted fields in the TD-MoM algorithm and by using the TD-MoM solution to calculate the fields which impinge on to the screen. To show the accuracy of the developed hybrid method, numerical results are compared to results obtained by established frequency domain numerical codes.

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