Resource Type

Journal Article 11

Year

2021 1

2020 2

2018 1

2015 1

2014 1

2012 1

2009 1

2008 1

2006 2

open ︾

Keywords

Quadrature demodulation 2

B-mode ultrasound imaging 1

BPSK 1

Color flow imaging 1

Coriolis mass flowmeter 1

Digital signal processing method 1

Finite impulse response filter 1

Gauss quadrature 1

Gauss-Legendre quadrature 1

Hankel transformation 1

Hermite polynomial 1

Hilbert transform 1

In- and quadrature-phase (I/Q) imbalance 1

Laguerre polynomial 1

Legendre polynomial 1

Orthogonal frequency division multiplexing (OFDM) 1

Sliding discrete time Fourier transform (SDTFT) 1

Standard-independent 1

Two-phase flow condition 1

adaptive signal processing 1

open ︾

Search scope:

排序： Display mode:

Anefficient quadrature demodulator for medical ultrasound imaging

Hao ZHOU,Yin-fei ZHENG

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 4,   Pages 301-310 doi: 10.1631/FITEE.1400205

Abstract: Quadrature demodulation is used in medical ultrasound imaging to derive the envelope and instantaneousIn quadrature demodulation, RF signal is multiplied with the sine and cosine wave reference signal andIn this paper, we propose an efficient quadrature demodulation method for B-mode and color flow imagingFrom the simulation results, the proposed quadrature demodulation method produced similar normalizedThese results indicated that the proposed method can maintain the performance of quadrature demodulation

Keywords： B-mode ultrasound imaging     Color flow imaging     Quadrature demodulation     Finite impulse response filter    

HTML PDF Collect

Digital Readout System for Micromachined Gyroscope and Analysis for its Demodulation Algorithm

ZHOU Bin, GAO Zhong-yu, CHEN Huai, ZHANG Rong, CHEN Zhi-yong

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 106-110 doi: 10.1007/s11465-005-0016-5

Abstract: the gyroscope, this system uses a floating-type digital signal processor (DSP) to process the signal demodulationA new demodulation algorithm of least mean square demodulation (LMSD) has been developed inside DSP.

Keywords： demodulation algorithm     vibration-wheel micromachined     feedback     flexible parameter     pressure    

HTML PDF Collect

An Adaptive Demodulation Method for BPSK Signals

Li Yanxin,Hu Aiqun,Song Yubo

Strategic Study of CAE 2006, Volume 8, Issue 5,   Pages 49-51

Abstract: is employed for studying the demodulating procedure and the performance of the novel adaptive BPSK demodulationThe novel adaptive BPSK demodulation does not need the adaptive filter completing convergence.Also, it is indicated that the demodulation method has many advantages over conventional ones, such as

Keywords： digital communications     adaptive signal processing     demodulation     BPSK    

HTML PDF Collect

frequency synthesizer with optimized VCO and reduced current mismatch CP

Chunhui Li, Lijun Sun, Jiarong Liu, Yang Zhang, Haiyang Li, Huaxiang Wang,ChunhuiLi@tju.edu.cn,sunlijun@tju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2,   Pages 141-286 doi: 10.1631/FITEE.1900558

Abstract: As an increasingly popular flow metering technology, exhibits high measurement accuracy under single-phase flow condition and is widely used in the industry. However, under complex flow conditions, such as two-phase flow, the measurement accuracy is greatly decreased due to various factors including improper signal processing methods. In this study, three s—the (QD) method, Hilbert method, and sliding discrete time Fourier transform method—are analyzed for their applications in processing sensor signals and providing measurement results under gas-liquid . Based on the analysis, specific improvements are applied to each method to deal with the signals under . For simulation, sensor signals under single- and s are established using a random walk model. The phase difference tracking performances of these three methods are evaluated in the simulation. Based on the digital signal processor, a converter program is implemented on its evaluation board. The converter program is tested under single- and s. The improved signal processing methods are evaluated in terms of the measurement accuracy and complexity. The QD algorithm has the best performance under the single-phase flow condition. Under the , the QD algorithm performs a little better in terms of the indication error and repeatability than the improved Hilbert algorithm at 160, 250, and 420 kg/h flow points, whereas the Hilbert algorithm outperforms the QD algorithm at the 600 kg/h flow point.

Keywords： Coriolis mass flowmeter     Digital signal processing method     Two-phase flow condition     Quadrature demodulation    

HTML PDF Collect

Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes

Masoud MASOUMI,Mehdi MASOUMI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 142-149 doi: 10.1007/s11465-014-0292-z

Abstract: Furthermore, differential quadrature method, as a numerical solution technique, is used to study the

Keywords： continuum theory     differential quadrature method     nanorod     longitudinal vibration    

HTML PDF Collect

High-precision Numerical Computation of High-degree Gauss quadrature Nodes

Zhang Qingli,Wang Xiaomei,Yin Shaotang,Jiang Haihe

Strategic Study of CAE 2008, Volume 10, Issue 2,   Pages 35-40

Abstract:

Gauss quadrature is used widely in many fields such as the engineeringThe nodes and weight factors of Gauss-quadrature are essential data to the numerical integration.Laguerre and Hermite polynomials, which are the nodes of Gauss-Legendre, Gauss-Laguerre and Gauss-Hermite Quadrature

Keywords： Gauss quadrature     Legendre polynomial     Laguerre polynomial     Hermite polynomial     extract roots    

HTML PDF Collect

Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg grating sensor

Zude ZHOU, Desheng JIANG, Quan LIU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 5-14 doi: 10.1007/s11465-009-0011-3

Abstract: The theoretical and experimental researches on the new-style FBG sensor (FBGS) technology, high-speed demodulation

Keywords： fiber Bragg grating sensor (FBGS)     mechanical equipment operation safety     embedded technology     high-speed demodulation    

HTML PDF Collect

Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1520-1530 doi: 10.1007/s11709-020-0672-x

Abstract: We use a reduced-order model based on the differential quadrature method (DQM) to discretize the governing

Keywords： velocity gradient elasticity theory     nanotube resonators     differential-quadrature method     nonlinear vibration    

HTML PDF Collect

Anisotropy of multi-layered structure with sliding and bonded interlayer conditions

Lingyun YOU, Kezhen YAN, Jianhong MAN, Nengyuan LIU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 632-645 doi: 10.1007/s11709-020-0617-4

Abstract: Gauss-Legendre quadrature is a key scheme in the numerical inversion process.

Keywords： structure     Hankel transformation     anisotropic     transversely isotropic     interlayer condition     Gauss-Legendre quadrature    

HTML PDF Collect

High efficiency spreading spectrum modulation based on double orthogonal complex sequences

Shi Xiaohong

Strategic Study of CAE 2012, Volume 14, Issue 3,   Pages 108-112

Abstract: After that, the selected sequence is modulated on carrier in QPSK(quadrature phase shift keying) mode

Keywords： modulation and demodulation     high efficiency spreading spectrum modulation     forward phase correction    

HTML PDF Collect

Standard-independent I/Q imbalance estimation and compensation scheme inOFDM direct-conversion transceivers None

Fang-lin GU, Shan WANG, Wen-wu WANG

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 3,   Pages 388-397 doi: 10.1631/FITEE.1700003

Abstract: However, they suffer from a serious in- and quadrature-phase (I/Q) imbalance problem.

Keywords： In- and quadrature-phase (I/Q) imbalance     Orthogonal frequency division multiplexing (OFDM)     Standard-independent    

HTML PDF Collect

Title Author Date Type Operation

Anefficient quadrature demodulator for medical ultrasound imaging

Hao ZHOU,Yin-fei ZHENG

Journal Article

Digital Readout System for Micromachined Gyroscope and Analysis for its Demodulation Algorithm

ZHOU Bin, GAO Zhong-yu, CHEN Huai, ZHANG Rong, CHEN Zhi-yong

Journal Article

An Adaptive Demodulation Method for BPSK Signals

Li Yanxin,Hu Aiqun,Song Yubo

Journal Article

frequency synthesizer with optimized VCO and reduced current mismatch CP

Chunhui Li, Lijun Sun, Jiarong Liu, Yang Zhang, Haiyang Li, Huaxiang Wang,ChunhuiLi@tju.edu.cn,sunlijun@tju.edu.cn

Journal Article

Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes

Masoud MASOUMI,Mehdi MASOUMI

Journal Article

High-precision Numerical Computation of High-degree Gauss quadrature Nodes

Zhang Qingli,Wang Xiaomei,Yin Shaotang,Jiang Haihe

Journal Article

Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg grating sensor

Zude ZHOU, Desheng JIANG, Quan LIU

Journal Article

Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Journal Article

Anisotropy of multi-layered structure with sliding and bonded interlayer conditions

Lingyun YOU, Kezhen YAN, Jianhong MAN, Nengyuan LIU

Journal Article

High efficiency spreading spectrum modulation based on double orthogonal complex sequences

Shi Xiaohong

Journal Article

Standard-independent I/Q imbalance estimation and compensation scheme inOFDM direct-conversion transceivers

Fang-lin GU, Shan WANG, Wen-wu WANG

Journal Article