A radio frequency fingerprinting identification method based on energy entropy and color moments of the bispectrum

2017 ◽  
Author(s):  
Xin Wang ◽  
Jie Duan ◽  
Cheng Wang ◽  
Gaofeng Cui ◽  
Weidong Wang
Keyword(s):  
Radio Frequency ◽  
Identification Method ◽  
Energy Entropy

scholarly journals A New Structural Damage Identification Method Based on Wavelet Packet Energy Entropy of Impulse Response

2015 ◽  
Vol 9 (1) ◽  
pp. 570-576 ◽  
Author(s):  
Can He ◽  
Jianchun Xing ◽  
Juelong Li ◽  
Wei Qian ◽  
Xun Zhang
Keyword(s):  
Impulse Response ◽  
Structural Damage ◽  
Damage Identification ◽  
Wavelet Packet ◽  
Damage Index ◽  
Great Influence ◽  
Identification Method ◽  
Wavelet Energy ◽  
Energy Entropy ◽  
Structural Damage Identification

Excitation makes a great influence on the wavelet energy distribution of the response signal, this deficiency leads that the traditional structural damage identification method based on wavelet energy has a low precision. In order to solve this problem, a new structural damage identification method based on wavelet packet energy entropy (WPEE) of impulse response is presented in this paper. Firstly, natural excitation technique (NExT) is adopted to extract structural impulse response. Then, WPEE of the impulse response is computed, and the change rate of WPEE is used to construct the structural damage index. An experiment of damage identification on a pile structure is provided to verify the effectiveness of the proposed method. Experiment results show that this method can accurately identify the single damage and multi-damage.

scholarly journals Round-priority-based anti-collision tag identification method in a mobile radio-frequency identification system

2019 ◽  
Vol 15 (5) ◽  
pp. 155014771984604 ◽  
Author(s):  
Liqian Zhang ◽  
Xueliang Fu ◽  
Honghui Li
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Mobile Radio ◽  
Experimental Results ◽  
Identification System ◽  
Tag Identification ◽  
Identification Method ◽  
Frequency Identification ◽  
Moving Speed

In the mobile radio-frequency identification system, the accuracy and rapidity of tag recognition are undergoing great challenges. In this article, we proposed a novel tag anti-collision identification method based on tags’ priority called RPA in the mobile radio-frequency identification system. The algorithm sets the priority of recognition according to the sequence of tag entering the recognition area. The reader does not recognize the tags with low priority until the ones with high priority have been identified totally. The experimental results show that when the tags’ moving speed is lower than 4 m/s, the system can identify the total tags without loss, and the efficiency and identification speed can reach 73.7% and 762 tags per unit, respectively.

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