The Experts below are selected from a list of 132243 Experts worldwide ranked by ideXlab platform
S. Y. Ron Hui - One of the best experts on this subject based on the ideXlab platform.
-
Printed Spiral Winding Inductor With Wide Frequency Bandwidth
IEEE Transactions on Power Electronics, 2011Co-Authors: Chi Kwan Lee, S. Y. Ron HuiAbstract:Winding parasitic capacitance is a major factor limiting the Bandwidth of an inductor. In this paper, 1) the traditional, 2) the alternating, and 3) the partial alternating winding methods are evaluated for the multilayer printed spiral winding inductors for megahertz operations. The self-capacitances of various winding structures are estimated by the summation of parasitic capacitance among the turns of a winding. The electric field energy distributions in the inductors are derived from the voltage profiles to illustrate the relative magnitudes of winding parasitic capacitances. The results show that parasitic capacitance reduction can be achieved by reducing stored electric field energy. The partial alternating winding method is found to have the widest Frequency Bandwidth with reduced number of through-hole vias for multilayer printed spiral winding design. The theoretical analysis has been confirmed with practical measurements. The results provide useful information for the optimal design of coreless or core-based high-Frequency planar magnetics.
-
Multilayer stacked coreless printed spiral winding inductor with wide Frequency Bandwidth
2009 IEEE Energy Conversion Congress and Exposition, 2009Co-Authors: Chi Kwan Lee, S. Y. Ron HuiAbstract:In this paper, three types of winding methods for the multi-layer stacked coreless printed spiral winding inductors are studied and evaluated for megahertz operation. They are traditional winding, alternating winding and partial alternating winding. The winding parasitic capacitances of different windings structures are estimated by distributed capacitance models. The electric field energy distributions in the inductors are derived from the voltage profiles to illustrate the relative magnitudes of winding parasitic capacitances. Calculated results show that partial alternating winding has a wide Frequency Bandwidth with reduced number of through-hole via. All calculated parameters are confirmed with measurements. The results provide useful information for the optimal design of coreless spiral or core-based planar inductors.
Chi Kwan Lee - One of the best experts on this subject based on the ideXlab platform.
-
Printed Spiral Winding Inductor With Wide Frequency Bandwidth
IEEE Transactions on Power Electronics, 2011Co-Authors: Chi Kwan Lee, S. Y. Ron HuiAbstract:Winding parasitic capacitance is a major factor limiting the Bandwidth of an inductor. In this paper, 1) the traditional, 2) the alternating, and 3) the partial alternating winding methods are evaluated for the multilayer printed spiral winding inductors for megahertz operations. The self-capacitances of various winding structures are estimated by the summation of parasitic capacitance among the turns of a winding. The electric field energy distributions in the inductors are derived from the voltage profiles to illustrate the relative magnitudes of winding parasitic capacitances. The results show that parasitic capacitance reduction can be achieved by reducing stored electric field energy. The partial alternating winding method is found to have the widest Frequency Bandwidth with reduced number of through-hole vias for multilayer printed spiral winding design. The theoretical analysis has been confirmed with practical measurements. The results provide useful information for the optimal design of coreless or core-based high-Frequency planar magnetics.
-
Multilayer stacked coreless printed spiral winding inductor with wide Frequency Bandwidth
2009 IEEE Energy Conversion Congress and Exposition, 2009Co-Authors: Chi Kwan Lee, S. Y. Ron HuiAbstract:In this paper, three types of winding methods for the multi-layer stacked coreless printed spiral winding inductors are studied and evaluated for megahertz operation. They are traditional winding, alternating winding and partial alternating winding. The winding parasitic capacitances of different windings structures are estimated by distributed capacitance models. The electric field energy distributions in the inductors are derived from the voltage profiles to illustrate the relative magnitudes of winding parasitic capacitances. Calculated results show that partial alternating winding has a wide Frequency Bandwidth with reduced number of through-hole via. All calculated parameters are confirmed with measurements. The results provide useful information for the optimal design of coreless spiral or core-based planar inductors.
Kenichi Higuchi - One of the best experts on this subject based on the ideXlab platform.
-
APCC - Investigation on optimum Frequency Bandwidth allocation method among service channels for system throughput maximization
2017 23rd Asia-Pacific Conference on Communications (APCC), 2017Co-Authors: Shota Mizuno, Dairoku Muramatsu, Yasuaki Yuda, Kenichi HiguchiAbstract:In the fifth generation mobile communication systems, various wireless communication services such as massive machine-type communications (mMTC), ultra-reliable low latency communications (URLLC), and enhanced mobile broadband (eMBB) will be supported. The physical channels (service channels) dedicated to these respective wireless communication services will be multiplexed in a shared system Frequency band and these services will have different requirements regarding spectrum efficiency and fairness among terminals. Therefore, appropriate Frequency Bandwidth assignment to each service channel considering the service requirement, number of terminals, and their channel conditions for all wireless communication services is important to maximize the system performance. In this paper, we define different forms of system throughput for the respective service channels considering different service requirements. Based on a definition of the integrated system throughput that combines the system throughput levels of all service channels, this paper proposes the optimum Frequency Bandwidth allocation method among service channels to maximize the integrated system throughput. Computer simulation results show the effectiveness of the proposed method.
-
Investigation on optimum Frequency Bandwidth allocation method among service channels for system throughput maximization
2017 23rd Asia-Pacific Conference on Communications (APCC), 2017Co-Authors: Shota Mizuno, Dairoku Muramatsu, Yasuaki Yuda, Kenichi HiguchiAbstract:In the fifth generation mobile communication systems, various wireless communication services such as massive machine-type communications (mMTC), ultra-reliable low latency communications (URLLC), and enhanced mobile broadband (eMBB) will be supported. The physical channels (service channels) dedicated to these respective wireless communication services will be multiplexed in a shared system Frequency band and these services will have different requirements regarding spectrum efficiency and fairness among terminals. Therefore, appropriate Frequency Bandwidth assignment to each service channel considering the service requirement, number of terminals, and their channel conditions for all wireless communication services is important to maximize the system performance. In this paper, we define different forms of system throughput for the respective service channels considering different service requirements. Based on a definition of the integrated system throughput that combines the system throughput levels of all service channels, this paper proposes the optimum Frequency Bandwidth allocation method among service channels to maximize the integrated system throughput. Computer simulation results show the effectiveness of the proposed method.
R Sluijter - One of the best experts on this subject based on the ideXlab platform.
-
speech enhancement via Frequency Bandwidth extension using line spectral frequencies
International Conference on Acoustics Speech and Signal Processing, 2001Co-Authors: Samir Chennoukh, A Gerrits, G Miet, R SluijterAbstract:This paper contributes to narrowband speech enhancement by means of Frequency Bandwidth extension. A new algorithm is proposed for generating synthetic Frequency components in the high-band (i.e., 4-8 kHz) given the low-band ones (i.e., 0-4 kHz) for wide-band speech synthesis. It is based on linear prediction (LPC) analysis-synthesis. It consists of a spectral envelope extension using efficiently line spectral frequencies (LSF) and a Bandwidth extension of the LPC analysis residual using a spectral folding. The low-band LSF of the synthesis signal are obtained from the input speech signal and the high-band LSF are estimated from the low-band ones using statistical models. This estimation is achieved by means of four models that are distinguished by means of the first two reflection coefficients obtained from the input signal linear prediction analysis.
-
ICASSP - Speech enhancement via Frequency Bandwidth extension using line spectral frequencies
2001 IEEE International Conference on Acoustics Speech and Signal Processing. Proceedings (Cat. No.01CH37221), 1Co-Authors: Samir Chennoukh, A Gerrits, G Miet, R SluijterAbstract:This paper contributes to narrowband speech enhancement by means of Frequency Bandwidth extension. A new algorithm is proposed for generating synthetic Frequency components in the high-band (i.e., 4-8 kHz) given the low-band ones (i.e., 0-4 kHz) for wide-band speech synthesis. It is based on linear prediction (LPC) analysis-synthesis. It consists of a spectral envelope extension using efficiently line spectral frequencies (LSF) and a Bandwidth extension of the LPC analysis residual using a spectral folding. The low-band LSF of the synthesis signal are obtained from the input speech signal and the high-band LSF are estimated from the low-band ones using statistical models. This estimation is achieved by means of four models that are distinguished by means of the first two reflection coefficients obtained from the input signal linear prediction analysis.
Shota Mizuno - One of the best experts on this subject based on the ideXlab platform.
-
APCC - Investigation on optimum Frequency Bandwidth allocation method among service channels for system throughput maximization
2017 23rd Asia-Pacific Conference on Communications (APCC), 2017Co-Authors: Shota Mizuno, Dairoku Muramatsu, Yasuaki Yuda, Kenichi HiguchiAbstract:In the fifth generation mobile communication systems, various wireless communication services such as massive machine-type communications (mMTC), ultra-reliable low latency communications (URLLC), and enhanced mobile broadband (eMBB) will be supported. The physical channels (service channels) dedicated to these respective wireless communication services will be multiplexed in a shared system Frequency band and these services will have different requirements regarding spectrum efficiency and fairness among terminals. Therefore, appropriate Frequency Bandwidth assignment to each service channel considering the service requirement, number of terminals, and their channel conditions for all wireless communication services is important to maximize the system performance. In this paper, we define different forms of system throughput for the respective service channels considering different service requirements. Based on a definition of the integrated system throughput that combines the system throughput levels of all service channels, this paper proposes the optimum Frequency Bandwidth allocation method among service channels to maximize the integrated system throughput. Computer simulation results show the effectiveness of the proposed method.
-
Investigation on optimum Frequency Bandwidth allocation method among service channels for system throughput maximization
2017 23rd Asia-Pacific Conference on Communications (APCC), 2017Co-Authors: Shota Mizuno, Dairoku Muramatsu, Yasuaki Yuda, Kenichi HiguchiAbstract:In the fifth generation mobile communication systems, various wireless communication services such as massive machine-type communications (mMTC), ultra-reliable low latency communications (URLLC), and enhanced mobile broadband (eMBB) will be supported. The physical channels (service channels) dedicated to these respective wireless communication services will be multiplexed in a shared system Frequency band and these services will have different requirements regarding spectrum efficiency and fairness among terminals. Therefore, appropriate Frequency Bandwidth assignment to each service channel considering the service requirement, number of terminals, and their channel conditions for all wireless communication services is important to maximize the system performance. In this paper, we define different forms of system throughput for the respective service channels considering different service requirements. Based on a definition of the integrated system throughput that combines the system throughput levels of all service channels, this paper proposes the optimum Frequency Bandwidth allocation method among service channels to maximize the integrated system throughput. Computer simulation results show the effectiveness of the proposed method.
