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2001 Vol. 23, No. 2
Display Method:
2001, 23(2): 105-111.
Abstract:
The VPN service management architecture is proposed based on the logical layer architecture of the TMN and the function of the subsystem in the architecture is analyzed. Based on this, the management information modei of the VPN service management is...
The VPN service management architecture is proposed based on the logical layer architecture of the TMN and the function of the subsystem in the architecture is analyzed. Based on this, the management information modei of the VPN service management is...
2001, 23(2): 112-117.
Abstract:
In this paper, the clock-controlled sequence is presented as a potentially superior spreading code for A-CDMA systems. First, on the basis of an A-CDMA system modei, the relationship between the average bit error probability and the cross-correlation...
In this paper, the clock-controlled sequence is presented as a potentially superior spreading code for A-CDMA systems. First, on the basis of an A-CDMA system modei, the relationship between the average bit error probability and the cross-correlation...
2001, 23(2): 118-124.
Abstract:
This paper discussed the uniform under-sampling of multiple bandpass signals in digital receiver. For these multiple real or complex bandpass signals having arbitrary band position and bandwidth, the acceptable sampling rate has been given. Using thi...
This paper discussed the uniform under-sampling of multiple bandpass signals in digital receiver. For these multiple real or complex bandpass signals having arbitrary band position and bandwidth, the acceptable sampling rate has been given. Using thi...
2001, 23(2): 125-133.
Abstract:
This paper presents an algorithm for video signal coding based on 3D-wavelet transformation. When the frame order t of the video signal is replaced by order z,the video signal can be looked as a block in the 3D-space. After split the block into small...
This paper presents an algorithm for video signal coding based on 3D-wavelet transformation. When the frame order t of the video signal is replaced by order z,the video signal can be looked as a block in the 3D-space. After split the block into small...
2001, 23(2): 134-139.
Abstract:
This paper mainly studies the edge detection of noisy images. An edge detector based on the fuzzy theory is presented. The algorithm first makes the pixels in the window as a fuzzy set, and divides two sub-sets by their membership functions, and then...
This paper mainly studies the edge detection of noisy images. An edge detector based on the fuzzy theory is presented. The algorithm first makes the pixels in the window as a fuzzy set, and divides two sub-sets by their membership functions, and then...
2001, 23(2): 140-146.
Abstract:
In this paper,A new cumulants-based method for the joint estimations of frequencies and 2D-DOAs of spatial signals are dicussed. After analysing the model of data and the virtual-ESPRIT,the authors use PRO-ESPRIT to estimate the parameters of signals...
In this paper,A new cumulants-based method for the joint estimations of frequencies and 2D-DOAs of spatial signals are dicussed. After analysing the model of data and the virtual-ESPRIT,the authors use PRO-ESPRIT to estimate the parameters of signals...
2001, 23(2): 147-153.
Abstract:
A real-time MPEG-2 layerl,2 audio CODEC realized on one TMS320C31 chip,which is a new DSP product of TI,is developed in this paper. In order to realize code decode in real-time,new fast algorithms for MPEG-2 audio sub-band analysis filter and sub-ban...
A real-time MPEG-2 layerl,2 audio CODEC realized on one TMS320C31 chip,which is a new DSP product of TI,is developed in this paper. In order to realize code decode in real-time,new fast algorithms for MPEG-2 audio sub-band analysis filter and sub-ban...
2001, 23(2): 154-159.
Abstract:
Epipolar geometry and projective geometry between uncalibrated images in stereo vision system is analyzed and a geometrical method for projective reconstruction of stereo vision is presented after proving the relationship between the plane projective...
Epipolar geometry and projective geometry between uncalibrated images in stereo vision system is analyzed and a geometrical method for projective reconstruction of stereo vision is presented after proving the relationship between the plane projective...
2001, 23(2): 160-167.
Abstract:
A 54 parameter high-order 3-D edge-element approach based on full magnetic vector variational formulas is discussed.This approach eliminates the spurious solutions efficiently and possesses very high accuracy.The analyses of the scattering characteri...
A 54 parameter high-order 3-D edge-element approach based on full magnetic vector variational formulas is discussed.This approach eliminates the spurious solutions efficiently and possesses very high accuracy.The analyses of the scattering characteri...
2001, 23(2): 168-174.
Abstract:
This paper deals with the electromagnetic characterization of the transmission and scattering properties of a slit in a conducting plate for TM polarization. To alleviate computational constraints for the problem, a connection algorithm is developed ...
This paper deals with the electromagnetic characterization of the transmission and scattering properties of a slit in a conducting plate for TM polarization. To alleviate computational constraints for the problem, a connection algorithm is developed ...
2001, 23(2): 175-180.
Abstract:
An asymmetric ridge waveguide slot array is a novel linear array radiating element for phased array antenna.The phased array can scan to wide angle (60)in azimuth,and can eliminate the secondary beams when the beam is scanned, which is consisted of m...
An asymmetric ridge waveguide slot array is a novel linear array radiating element for phased array antenna.The phased array can scan to wide angle (60)in azimuth,and can eliminate the secondary beams when the beam is scanned, which is consisted of m...
2001, 23(2): 181-186.
Abstract:
Crosstalk between conductor traces on printed circuit board is one primary source of EMI in switching power supply.Field analysis is carried out to study the electric field on PCB.Simulation and measured emission map offer valuable visual aids to PCB...
Crosstalk between conductor traces on printed circuit board is one primary source of EMI in switching power supply.Field analysis is carried out to study the electric field on PCB.Simulation and measured emission map offer valuable visual aids to PCB...
2001, 23(2): 187-191.
Abstract:
This paper presents a novel circuit dynamic analysis method using FFT technique based on diakoptics. The algorithm di vides a complex dynamic circuit into some linear sub-circuits and link branches (linear and nonlinear). The linear sub-circuits is r...
This paper presents a novel circuit dynamic analysis method using FFT technique based on diakoptics. The algorithm di vides a complex dynamic circuit into some linear sub-circuits and link branches (linear and nonlinear). The linear sub-circuits is r...
2001, 23(2): 192-196.
Abstract:
A robust and efBcient method of human face fine location is presented using human facial structure and mathematical morphology. The algorithm, which is mainly used in head-and- shoulder video coding, plays a critical role to decrease human face predi...
A robust and efBcient method of human face fine location is presented using human facial structure and mathematical morphology. The algorithm, which is mainly used in head-and- shoulder video coding, plays a critical role to decrease human face predi...
2001, 23(2): 197-202.
Abstract:
The discrete Fourier transform (DFT) and fast Fourier transform (FFT) for com-plex conjugate-symmetric input data are studied in this paper. The DFT of a complex conjugate-symmetric sequence has the nature that its imaginary part is zero. An efflcien...
The discrete Fourier transform (DFT) and fast Fourier transform (FFT) for com-plex conjugate-symmetric input data are studied in this paper. The DFT of a complex conjugate-symmetric sequence has the nature that its imaginary part is zero. An efflcien...
2001, 23(2): 203-207.
Abstract:
The gate leakage current of 6H-SiC JFET in high temperature has been analyzed and simulated, The result shows that the effect of the gate leakage current on JFET will become more and more notable when the temperature is higher than 700K. Based on the...
The gate leakage current of 6H-SiC JFET in high temperature has been analyzed and simulated, The result shows that the effect of the gate leakage current on JFET will become more and more notable when the temperature is higher than 700K. Based on the...
