Article in wseas transactions on Communications · July 016 citations reads 338 authors



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Wideband Spectrum Sensing by Multistep Frequency Domain Energy
Detection in GNU Radio
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WSEAS Transactions on Communications · July 2016
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Wideband Spectrum Sensing by Multistep Frequency Domain Energy 
Detection in GNU Radio 
 
SHUYA DONG, XIAOQIN WU, YONG BAI

College of Information Science and Technology,
Hainan University,
58 Renmin Ave., Haikou, Hainan 570228,
CHINA 
* Corresponding author, email: bai@hainu.edu.cn 
Abstract: - 
Wideband spectrum sensing capability can be enabled in GNU Radio, which is an open source 
software radio platform. In order to improve the detection performance of GNU Radio in practice, we studied 
its approach of wideband spectrum sensing, i.e., multistep frequency-domain energy detection. We first gave a 
detailed analysis of the functions and implementation details in its wideband spectrum sensing procedure. Then, 
we simulated the whole procedure of the wideband spectrum sensing by using MATLAB. With the simulation 
results, we discussed the factors influencing the decision threshold of energy detection and proposed a method 
to determine the decision threshold for each step in the multistep detection. The results presented in this paper 
can be used for setting parameters of GNU Radio to achieve more precise spectrum sensing. 

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