Spectrum measurement and analysis of TV band support of Cognitive Radio operation in India

2013 ◽  
Author(s):  
Kishor Patil ◽  
Knud Erik Skouby ◽  
Ramjee Prasad
Keyword(s):  
Cognitive Radio ◽  
Spectrum Measurement ◽  
Measurement And Analysis

Spectrum measurement and utilization in an outdoor 5‐GHz Wi‐Fi network using cooperative cognitive radio system

2021 ◽  
Author(s):  
Walid El‐Shafai ◽  
Ahmed Fawzi ◽  
Abdelhalim Zekry ◽  
Fathi E. Abd El‐Samie ◽  
Mohammed Abd‐Elnaby
Keyword(s):  
Cognitive Radio ◽  
Radio System ◽  
Cognitive Radio System ◽  
Spectrum Measurement ◽  
5 Ghz

Vibration Frequency Spectrum Measurement on a Hydraulic Turbine Runner Chamber for a Large Bulb Hydraulic Generator Set

2014 ◽  
Vol 889-890 ◽  
pp. 712-717
Author(s):  
Chang Zheng Huang ◽  
Jin Li ◽  
Zu Chao Yang
Keyword(s):  
Frequency Spectrum ◽  
Optimization Design ◽  
Hydraulic Turbine ◽  
Spectrum Measurement ◽  
Measurement And Analysis ◽  
Turbine Runner ◽  
Analysis System ◽  
A Charge ◽  
Hydraulic Generator ◽  
Vibration Frequency Spectrum

The vibration is severe for a hydraulic turbine runner chamber of a large bulb hydraulic generator set. A measurement and analysis system is composed of an acceleration transducer, a charge amplifier, and a dynamic data collecting & analyzing system. It is used to test the frequency spectrum, which provide a basis for the optimization design based on the modal analysis, so that its natural frequencies can stagger these frequencies of vibration sources, the resonance does not occur and the vibration is reduced.

scholarly journals Interference Temperature Measurements and Spectrum Occupancy Evaluation in the Context of Cognitive Radio

2018 ◽  
Vol 10 (3) ◽  
pp. 1007
Author(s):  
Paulson N. Eberechukwu ◽  
Dauda S. Umar ◽  
Alias Mohd ◽  
Kamaludin M. Y. ◽  
M. Adib bin Sarijari ◽  
...  
Keyword(s):  
Cognitive Radio ◽  
Detection Threshold ◽  
Radio Spectrum ◽  
Real Spectrum ◽  
Adjacent Channel Interference ◽  
Spectrum Occupancy ◽  
Interference Temperature ◽  
Spectrum Measurement ◽  
Set Up ◽  
The Impact

<span lang="EN-MY">This paper presents a refined radio spectrum measurement platform specifically designed for spectrum occupancy surveys in the context of Cognitive radio. Cognitive radio permits the opportunistic usage of licensed bands by unlicensed users without causing harmful interference to the licensed user. In this work, a study based on the measurement of the 800 MHz to 2.4 GHz frequency band at two different locations inside Universiti Teknologi Malaysia (UTM), Johor Bahru campus, Malaysia is presented. Two Tektronix RSA306B spectrum analyzer are set up to conduct simultaneous measurements at different locations for a 24 hours period. The analysis conducted in this work is based on the real spectrum data acquired from environment in the experimental set up. Busy and idle channels were identified. The channels subject to adjacent-channel interference were also identified, and the impact of the detection threshold used to detect channel activities was also discussed. The consistency of the observed channel occupation over a range of thresholds and a sudden drop has good characteristics in determining an appropriate threshold needed in order to avoid interference.</span>

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