Tiered Spectrum Measurement Markets for Licensed Secondary Spectrum

2019 ◽  
pp. 165-182
Author(s):  
Arnob Ghosh ◽  
Randall Berry ◽  
Vaneet Aggarwal
Keyword(s):  
Spectrum Measurement

scholarly journals Improved short-baseline neutrino oscillation search and energy spectrum measurement with the PROSPECT experiment at HFIR

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
M. Andriamirado ◽  
A. B. Balantekin ◽  
H. R. Band ◽  
C. D. Bass ◽  
D. E. Bergeron ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Neutrino Oscillation ◽  
Short Baseline ◽  
Spectrum Measurement

scholarly journals Spectral Analysis of Stationary Signals Based on Two Simplified Arrangements of Chirp Transform Spectrometer

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 65
Author(s):  
Quan Zhao ◽  
Ling Tong ◽  
Bo Gao
Keyword(s):  
Spectral Analysis ◽  
Frequency Conversion ◽  
Frequency Resolution ◽  
Matching Problem ◽  
System Sensitivity ◽  
Deep Space Exploration ◽  
Spectrum Measurement ◽  
Stationary Signals ◽  
Simulation And Experiment ◽  
Remote Sensing Systems

The classical two-channel push-pull chirp transform spectrometer (CTS) has been widely applied in satellite-borne remote sensing systems for earth observation and deep space exploration. In this paper, we present two simplified structures with single M(l)-C(s) CTS arrangements for the spectral analysis of stationary signals. A simplified CTS system with a single M(l)-C(s) arrangement and a time delay line was firstly developed. Another simplified structure of CTS with a M(l)-C(s) arrangement and a frequency conversion channel was also developed for spectral analysis of stationary signals. Simulation and experiment results demonstrate that the two simplified arrangements can both realize spectrum measurement for the stationary signals and obtain the same frequency resolution, amplitude accuracy and system sensitivity as that of the classical two-channel push–pull CTS system. Compared to the classical CTS structure, the two simplified arrangements require fewer devices, save power consumption and have reduced mass. The matching problem between the two channels can be avoided in the two simplified arrangements. The simplified CTS arrangements may have potential application in the spectrum measurement of stationary signals in the field of aviation and spaceflight.

scholarly journals Gamma Spectrum Measurement Following the Nuclear Decay

2021 ◽  
Vol 1739 ◽  
pp. 012035
Author(s):  
Shuifa Shen ◽  
Feipeng Wang ◽  
Yupeng Yan ◽  
Jiejie Shen ◽  
Yan Li ◽  
...  
Keyword(s):  
Gamma Spectrum ◽  
Nuclear Decay ◽  
Spectrum Measurement

scholarly journals Dynamic frequency-noise spectrum measurement for a frequency-swept DFB laser with short-delayed self-heterodyne method

2015 ◽  
Vol 23 (22) ◽  
pp. 29245 ◽  
Author(s):  
Qian Zhou ◽  
Jie Qin ◽  
Weilin Xie ◽  
Zhangweiyi Liu ◽  
Yitian Tong ◽  
...  
Keyword(s):  
Noise Spectrum ◽  
Frequency Noise ◽  
Heterodyne Method ◽  
Spectrum Measurement ◽  
Dfb Laser ◽  
Dynamic Frequency

Electrical and Optical Properties of Si+ and P+ Implanted InP:Fe

1990 ◽  
Vol 201 ◽  
Author(s):  
Honglie Shen ◽  
Genqing Yang ◽  
Zuyao Zhou ◽  
Guanqun Xia ◽  
Shichang Zou
Keyword(s):  
Optical Properties ◽  
Silicon Nitride ◽  
Temperature Dependence ◽  
Optimal Condition ◽  
Room Temperature ◽  
Broad Band ◽  
Photoluminescence Spectra ◽  
Electrical And Optical Properties ◽  
Spectrum Measurement ◽  
Single Implant

AbstractDual implantations of Si+ and P+ into InP:Fe were performed both at 200°C and room temperature. Si+ ions were implanted by 150keV with doses ranging from 5×1013 /cm2 to 1×1015 /cm2, while P+ ions were implanted by 110keV. 160keV and 180keV with doses ranging from 1×l013 /cm2 to 1×1015 /cm2. Hall measurements and photoluminescence spectra were used to characterize the silicon nitride encapsulated annealed samples. It was found that enhanced activation can be obtained by Si+ and P+ dual implantations. The optimal condition for dual implantations is that the atomic distribution of implanted P overlaps that of implanted si with the same implant dose. For a dose of 5×l014 /cm2, the highest activation for dual implants is 70% while the activation for single implant is 40% after annealing at 750°C for 15 minutes. PL spectrum measurement was carried out at temperatures from 11K to 100K. A broad band at about 1.26eV was found in Si+ implanted samples, of which the intensity increased with increasing of the Si dose and decreased with increasing of the co-implant P+ dose. The temperature dependence of the broad band showed that it is a complex (Vp-Sip) related band. All these results indicate that silicon is an amphoteric species in InP.

Evaluation of spectrum measurement devices for operational use

2002 ◽  
Vol 476 (1-2) ◽  
pp. 416-422 ◽  
Author(s):  
Robert T Devine ◽  
Leonard L Romero ◽  
Devin W Gray ◽  
David T Seagraves ◽  
Richard H Olsher ◽  
...  
Keyword(s):  
Spectrum Measurement ◽  
Measurement Devices

Effects of Roughness Strip and Acoustic Sensor Height on Subsonic Boundary Layer by Experiment

2013 ◽  
Vol 421 ◽  
pp. 459-463
Author(s):  
Ning Zong ◽  
Guang Jun Yang ◽  
Jing Sun
Keyword(s):  
Boundary Layer ◽  
Flow Structure ◽  
Dynamic Test ◽  
Acoustic Sensor ◽  
Body Type ◽  
Test Plate ◽  
Spectrum Measurement ◽  
Layer Flow ◽  
Analysis System ◽  
Wind Speed Measurement

According to the measurement requirements of acoustic fatigue load on aft fuselage structure and the external installation restriction of the acoustic sensor on aircraft surface, an acoustic sensor is installed on the silencing jet test plate with reference to body type of the real aircraft. A dynamic test and analysis system combined hot wire wind speed measurement and acoustic spectrum measurement is built up for the combined experiments with different acoustic sensor height and various boundary layer flow structure at subsonic flow condition. Turbulence development of different boundary layer is analyzed. The test result can be coordinated with the local measurement to aircraft flow structure so as to estimate the effect of acoustic sensor on the flow field.

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