-
Invited Paper: Raptor Code and Massive MiMo for Secure Wireless Delivery in 5G
Djedjiga Benzid,
Michel Kadoch
Issue:
Volume 7, Issue 6, December 2019
Pages:
134-142
Received:
3 September 2019
Accepted:
4 October 2019
Published:
27 November 2019
Abstract: Based on broadcast transmission, the future Fifth-Generation networks, 5G, suffer from a critical threat, which is the eavesdropping. This issue can be fixed with the cryptographic protocols. Nevertheless, this method is complex and challenging because of the active topology of wireless networks, which does not permit effective management of security keys. Recently, Physical Layer Security (PLS) method is applied as an alternative solution to mitigate the privacy problem, where the characteristic of the physical layer schemes, namely the modulation, Massive Multi-Input Multi-Output (m-MiMo) and channel coding are exploited to ensure privacy. The fountain code is one of these methods where the legitimate receiver must recover the message before eavesdropper did. However, this feature cannot be exploited in 5G networks in the presence of an intruder using the m-MiMo. Furthermore, the design of Artificial Noise (AN) needed in m-MiMo involves a computational complexity and excessive consumption of energy that complicate the secrecy management for fountain code. In this article, we propose a new method to avoid this problem by judiciously exploiting the features of both technologies. The new approach uses the Raptor code feature, as considerably as the m-MiMo parameters aided by AN signal while reducing the transmission power of the AN. The numerical results indicate that the new approach ensures the protection of legitimate users on the channel and minimizes energy expenditure, which potentially gets to this proposed method a greener and secure transmission.
Abstract: Based on broadcast transmission, the future Fifth-Generation networks, 5G, suffer from a critical threat, which is the eavesdropping. This issue can be fixed with the cryptographic protocols. Nevertheless, this method is complex and challenging because of the active topology of wireless networks, which does not permit effective management of securi...
Show More
-
Detuning Control of Resonant Wireless Energy Transmission System Based on CGI-PLL
Peicong Qian,
Jinzhi Wang,
Xuan Zhang
Issue:
Volume 7, Issue 6, December 2019
Pages:
143-150
Received:
4 November 2019
Published:
3 December 2019
Abstract: At present, in the practical application of magnetic resonance wireless transmission technology, because of the change of distance, relative position between transmitting coil and receiving coil and load, the output power and transmission efficiency of transmission system will be greatly affected. Therefore, in order to improve the output power and transmission efficiency. In this paper, a new frequency tracking control algorithm based on Cascaded Generalized Integrator PLL (CGI-PLL) structure is proposed. The new frequency tracking control algorithm is used in the series- series circuit of magnetic resonance. It is planned to use this algorithm when the transmitting coil is detuning to a certain extent and the receiving coil is resonant at the same time. The phase compensation and soft switch are realized by controlling the phase difference between the output voltage and the output current of the primary side inverter. The experimental results show that the phase between the output voltage and the output current of the primary measurement inverter can remain unchanged when the load and mutual inductance are changed. Therefore, the CGI-PLL detuning control algorithm can actively track the frequency of the system, improve the output power and transmission efficiency of the system, and provide conditions for the operation of ZVS soft switch. It is proved that the new control algorithm proposed in this paper is feasible and correct.
Abstract: At present, in the practical application of magnetic resonance wireless transmission technology, because of the change of distance, relative position between transmitting coil and receiving coil and load, the output power and transmission efficiency of transmission system will be greatly affected. Therefore, in order to improve the output power and...
Show More
-
Analysis of Tibetan Folk Music Style Based on Audio Signal Processing
Ma Ying,
Li Kaiyong,
Hou Jiayu,
Ga Zangjia
Issue:
Volume 7, Issue 6, December 2019
Pages:
151-154
Received:
11 November 2019
Published:
3 December 2019
Abstract: National folk music has different styles, has extremely strong regional and national characteristics, and has a high cultural and artistic value. It carries the profound connotation of national culture. Music has non-semantic symbolicity and strong ambiguity, which makes the related research topics of music signals more challenging than speech signals. With the rapid increase of the number of digital music, due to the complexity of music itself, the ambiguity of the definition of the category of music and the limitation of the understanding of the characteristics of human auditory perception, Therefore, the analysis of the characteristics of folk music is a prerequisite for realizing the rapid and effective retrieval of folk music resources, and plays an important role in audio signal processing. However, there are few studies on the classification and information extraction of folk music. The article is based on the St-EN and St-ZCR feature extraction of the three styles of music in Aze, Le, and playing and singing in Amdo Tibetan folk music. Three kinds of musical styles have adopted a time-domain analysis is briefly analyzed Amdo Tibetan folk music signal, by extracting signal features music, We can find short-term energy than the short-time average zero-crossing rate of all types of music more clearly reflect the unique characteristics of the signal.
Abstract: National folk music has different styles, has extremely strong regional and national characteristics, and has a high cultural and artistic value. It carries the profound connotation of national culture. Music has non-semantic symbolicity and strong ambiguity, which makes the related research topics of music signals more challenging than speech sign...
Show More
-
Development of Live Working Device Based on Zero Potential Control Principle
Xu Li,
Zhu Ziqi,
Yang Qi,
Zhu Liang,
Li Hui,
Zeng Wenyuan,
Gao Quanzhe,
Ou Yuexiong,
Zhao Gang
Issue:
Volume 7, Issue 6, December 2019
Pages:
155-162
Received:
4 November 2019
Published:
12 December 2019
Abstract: In the case of live working in the distribution network, serious safety accidents will occur due to weak operation and weak safety awareness. The live working methods and equipment that meet the requirements for personal safety and power supply reliability need to be studied. In order to improve the safety of live working in distribution network, the working point zero potential control principle is proposed, and a prototype of the zero potential live operation device for distribution network is developed based on this principle. The principle and design of the charged working equipment based on the principle of zero potential control are introduced. The prototype has the functions of data collection, data analysis, logic protection and information transmission. When the selection and layout of the line conductors are different, the line parameters will also be different. For different conductor selection and layout schemes, three schemes are designed to simulate separately. The system model is established based on MATLAB, and the feasibility of the proposed method is verified by the working phase voltage curve. Experiments and third-party inspections show that the device is reliable in operation, quick in response, easy to operate, and can meet the zero potential control requirements of live working, which is of great significance to improve the safety of live working in distribution network.
Abstract: In the case of live working in the distribution network, serious safety accidents will occur due to weak operation and weak safety awareness. The live working methods and equipment that meet the requirements for personal safety and power supply reliability need to be studied. In order to improve the safety of live working in distribution network, t...
Show More
-
New Method for Zero Potential Non-stop Operation of Distribution Network Based on Injection Current
Zhu Liang,
Wang Zhenyu,
Yang Qi,
Xu Li,
Guo Hao,
Pen Shasha
Issue:
Volume 7, Issue 6, December 2019
Pages:
163-169
Received:
4 November 2019
Published:
12 December 2019
Abstract: In the case of live working in the distribution network, a live method of live working that satisfies the requirements for personal safety and power supply reliability needs to be studied, because of the serious safety accidents caused by misuse and weak safety awareness. Based on the zero potential characteristics of the operating point, a new method based on injection current for zero-potential uninterrupted operation in distribution network is proposed. The Floyd algorithm is used to calculate the shortest electrical distance from the live working point to the substation, and the capacitance value of the ground is measured by the resonant grounding system, and the current value injected further to the neutral point is calculated. By regulating the zero-sequence voltage, the neutral point voltage is equal to the difference between the operating phase line voltage drop and the operating phase power supply voltage, ensuring that the operating point voltage is zero. Finally, based on the PSCAD simulation software, the system model is established. The simulation verifies the feasibility of the proposed method by comparing the voltage curves of the working phase.
Abstract: In the case of live working in the distribution network, a live method of live working that satisfies the requirements for personal safety and power supply reliability needs to be studied, because of the serious safety accidents caused by misuse and weak safety awareness. Based on the zero potential characteristics of the operating point, a new met...
Show More
-
Smart Aircraft Landing Gear: The Mechatronic Approach
Issue:
Volume 7, Issue 6, December 2019
Pages:
170-176
Received:
30 August 2019
Accepted:
11 October 2019
Published:
25 December 2019
Abstract: Aircraft landing gears support the aircraft during ground operations, including take-off, landing impact, taxiing, gate handling and maintenance. In the aeronautical field, the aircraft mass repartition is a significant factor which ensures stability and safety. In order to have the best control of their device, pilots have to know the precise location of the aircraft’s center of gravity, especially during critical phases such as take-off and landing. Hence, it is interesting to develop a mechatronic system able to measure in real time before take-off the mass distributed on each landing gear. This measurement provides the ability for the pilot to avoid mass overload which can have direct impacts on the structural health integrity of the aircraft. This document presents the prototyping of an embedded system which allows determining and informing in real time about the mass distribution within a lightweight aircraft by measuring the pressure inside of each shock absorber. This prototype involves the design of a specific electronic card including an embedded microcontroller, several sensors, a Bluetooth module and an Android interface for smartphones. An application has been developed to directly print on the smartphone screen the aircraft acceleration during the flight and during the landing. It actually allows estimating the pitch and the roll angles of the aircraft during the flight which are computed using the X, Y and Z components of the acceleration. The two angles are represented by the aircraft pictograms.
Abstract: Aircraft landing gears support the aircraft during ground operations, including take-off, landing impact, taxiing, gate handling and maintenance. In the aeronautical field, the aircraft mass repartition is a significant factor which ensures stability and safety. In order to have the best control of their device, pilots have to know the precise loca...
Show More
