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2000 Vol. 22, No. 3
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2000, 22(3): 353-358.
Abstract:
In this paper, the time-frequency characteristics of complex targets are studied and the stability of time-frequency distribution of complex target is obtained with the aspect throughout the large angle range. Based on these table signatures, recogni...
In this paper, the time-frequency characteristics of complex targets are studied and the stability of time-frequency distribution of complex target is obtained with the aspect throughout the large angle range. Based on these table signatures, recogni...
2000, 22(3): 359-365.
Abstract:
In this paper an automatic multiresolution classification method is proposed to classify polarimetric synthetic aperture radar (SAR) image.At first a textured SAR image characterizing the terrain reflection is obtained by using a multi-look polarimet...
In this paper an automatic multiresolution classification method is proposed to classify polarimetric synthetic aperture radar (SAR) image.At first a textured SAR image characterizing the terrain reflection is obtained by using a multi-look polarimet...
2000, 22(3): 366-372.
Abstract:
With the help of optimal performance of the nonlinear least square method,two optimal location algorithms(the LMF location algorithm and quasi-Newton location algorithm) are presented in this paper.Comparting to foregone location algorithms,the simul...
With the help of optimal performance of the nonlinear least square method,two optimal location algorithms(the LMF location algorithm and quasi-Newton location algorithm) are presented in this paper.Comparting to foregone location algorithms,the simul...
2000, 22(3): 373-378.
Abstract:
In this paper, an algorithm of generating INSAR unwrapped phase image from SAR single-look complex images is presented. Besides the general processing technique, this article focuses on the methods of flat-earth phase removal, phase noise reduction a...
In this paper, an algorithm of generating INSAR unwrapped phase image from SAR single-look complex images is presented. Besides the general processing technique, this article focuses on the methods of flat-earth phase removal, phase noise reduction a...
2000, 22(3): 379-384.
Abstract:
Various factors leading to error in spaceborne SAR radiometric calibration are discussed,and an equation to estimate the radiometric calibration error is proposed．The equation for calculating SAR imaging processor gain based on chirp scaling algorith...
Various factors leading to error in spaceborne SAR radiometric calibration are discussed,and an equation to estimate the radiometric calibration error is proposed．The equation for calculating SAR imaging processor gain based on chirp scaling algorith...
2000, 22(3): 385-391.
Abstract:
Monopulse radar three-dimensional(3-D)images coincide with targets'size,but ISAR imaging does not hold,which is importantin precision guidance.The movement character of ship targets and the Doppler frequency induced by targets'3-D rotation are analys...
Monopulse radar three-dimensional(3-D)images coincide with targets'size,but ISAR imaging does not hold,which is importantin precision guidance.The movement character of ship targets and the Doppler frequency induced by targets'3-D rotation are analys...
2000, 22(3): 392-397.
Abstract:
The Superresolution mehtod based on the models of both the signal and the noise leads tO a superior accuracy thah the FFT method．This paper presents applications of superresolution signal estimatiors to Doppler beam sharpened imaging and proposes a m...
The Superresolution mehtod based on the models of both the signal and the noise leads tO a superior accuracy thah the FFT method．This paper presents applications of superresolution signal estimatiors to Doppler beam sharpened imaging and proposes a m...
2000, 22(3): 398-401.
Abstract:
A sampling theorem for signals in arbitrary passband is proposed and the efficient algorithm to solve the least sampling rate is given,which can be applied to signal reprdsentation based on its channel pattern.
A sampling theorem for signals in arbitrary passband is proposed and the efficient algorithm to solve the least sampling rate is given,which can be applied to signal reprdsentation based on its channel pattern.
2000, 22(3): 402-410.
Abstract:
This paper first introduces the idea about orientation wavelet subtree quantization and constructs a hybrid image coding using orientation wavelet subtree fractal quantization and zerotree wavelet quantization. With this coding method the horizontal,...
This paper first introduces the idea about orientation wavelet subtree quantization and constructs a hybrid image coding using orientation wavelet subtree fractal quantization and zerotree wavelet quantization. With this coding method the horizontal,...
2000, 22(3): 411-415.
Abstract:
Noise occurring in image generation and communication affects image quality.As a rule,median filtering or weighting smoothing is used to dwindle noise.But those ways can keep limited image details,some more value information also dwindles.This paper ...
Noise occurring in image generation and communication affects image quality.As a rule,median filtering or weighting smoothing is used to dwindle noise.But those ways can keep limited image details,some more value information also dwindles.This paper ...
2000, 22(3): 416-422.
Abstract:
For the operator M which is a mean shifted version of IFS(Iterated Function System) in wavelet domain is proved that in practical circumstances the same fixed point can be reached in only few iterations. So, the IFS in wavelet domain may converge wit...
For the operator M which is a mean shifted version of IFS(Iterated Function System) in wavelet domain is proved that in practical circumstances the same fixed point can be reached in only few iterations. So, the IFS in wavelet domain may converge wit...
2000, 22(3): 423-428.
Abstract:
In this papcr,a new approach to blind equalization based on cellular neural network (CNN)is Proposed.According to a reasonable template design method the template for blind equalization is designed.The result of computer simulation proves this approa...
In this papcr,a new approach to blind equalization based on cellular neural network (CNN)is Proposed.According to a reasonable template design method the template for blind equalization is designed.The result of computer simulation proves this approa...
2000, 22(3): 429-433.
Abstract:
This paper presents a kind of neural network model for nonlinear programming problems on the closed convex sets, defines its Liapunov energy function and shows its global asymptotic stability by using La Salle invariant principle under proper assumpt...
This paper presents a kind of neural network model for nonlinear programming problems on the closed convex sets, defines its Liapunov energy function and shows its global asymptotic stability by using La Salle invariant principle under proper assumpt...
2000, 22(3): 434-438.
Abstract:
This paper studies the problem of global exponential stability for the cellular neural networks. Three criterions about global exponential stability of the cellular neural networks are obtained by means of Lyapunov function approach and the method of...
This paper studies the problem of global exponential stability for the cellular neural networks. Three criterions about global exponential stability of the cellular neural networks are obtained by means of Lyapunov function approach and the method of...
2000, 22(3): 439-443.
Abstract:
The binary primitive M-sequences are discussed in this paper. It is shown that arbitrary two reciprocal primitive M-sequences have the same auto-correlation function and the equal linear complexity, meanwhile, the configuration of the two M-sequences...
The binary primitive M-sequences are discussed in this paper. It is shown that arbitrary two reciprocal primitive M-sequences have the same auto-correlation function and the equal linear complexity, meanwhile, the configuration of the two M-sequences...
2000, 22(3): 444-450.
Abstract:
A frequency limited orthogonal(FLO)wavelet with expected frequency property is constituted on the basis of Multiresolution Analysis (MRA)．A parameteris defined to characterize the frequency distribution of QRS complexes．Testing on varieties of wavefo...
A frequency limited orthogonal(FLO)wavelet with expected frequency property is constituted on the basis of Multiresolution Analysis (MRA)．A parameteris defined to characterize the frequency distribution of QRS complexes．Testing on varieties of wavefo...
2000, 22(3): 451-458.
Abstract:
The problem of optimal coherent detection of frequency-shift keying (FSK) signals transmitted over an additive colored Gaussian noise channel with imbalance gains in different frequencies(IGDF-ACGN channel) is studied. The structure of the optimal co...
The problem of optimal coherent detection of frequency-shift keying (FSK) signals transmitted over an additive colored Gaussian noise channel with imbalance gains in different frequencies(IGDF-ACGN channel) is studied. The structure of the optimal co...
2000, 22(3): 459-463.
Abstract:
A scheme of conference connection supported by Clos networks is presented.With the assumption in this scheme,some couples of input-output switch modules of conference network are exclusively assigned to every conference,it is proved that conference n...
A scheme of conference connection supported by Clos networks is presented.With the assumption in this scheme,some couples of input-output switch modules of conference network are exclusively assigned to every conference,it is proved that conference n...
2000, 22(3): 464-470.
Abstract:
According to the mechanism of Fiber Distributed Data Interface (FDDI), the characters of the access method are analyzed in order to set up a queue model for FDDI. Under lighter traffic, the mathematical analysis of the model is given,and the results ...
According to the mechanism of Fiber Distributed Data Interface (FDDI), the characters of the access method are analyzed in order to set up a queue model for FDDI. Under lighter traffic, the mathematical analysis of the model is given,and the results ...
2000, 22(3): 471-477.
Abstract:
When three dimensional vector scattering is analyzed by integral equation and the moment method(MM)or the fast multipole method(FMM)，the singular integrand will be done，If it is calculated by Gaussian integration directly,the accuracy will be very po...
When three dimensional vector scattering is analyzed by integral equation and the moment method(MM)or the fast multipole method(FMM)，the singular integrand will be done，If it is calculated by Gaussian integration directly,the accuracy will be very po...
2000, 22(3): 478-484.
Abstract:
The movement of antenna s near-field is studied in time domain. The near field distributions are analyzed by using plane wave-spectrum method. A sampling principle is deduced for planar near-field scanning in time domain. Some methods of near-far fie...
The movement of antenna s near-field is studied in time domain. The near field distributions are analyzed by using plane wave-spectrum method. A sampling principle is deduced for planar near-field scanning in time domain. Some methods of near-far fie...
2000, 22(3): 485-491.
Abstract:
Research Work on electron optics system of multi-beam klystron has been described systematically in this paper.Design consideration and design methods for periodic reversal permanent magnet focusing system are presented ,special technical problems me...
Research Work on electron optics system of multi-beam klystron has been described systematically in this paper.Design consideration and design methods for periodic reversal permanent magnet focusing system are presented ,special technical problems me...
2000, 22(3): 492-495.
Abstract:
The double-barrier light emission tunnel junctions have been fabricated. The characteristics of electronic resonant tunneling with the junctions have been analyzed. In connection with the electronic resonant tunneling and light emission mechanism of ...
The double-barrier light emission tunnel junctions have been fabricated. The characteristics of electronic resonant tunneling with the junctions have been analyzed. In connection with the electronic resonant tunneling and light emission mechanism of ...
2000, 22(3): 505-508.
Abstract:
Based on BAN s basic constructs and rules, the freshness in BAN logic is investigated. In this paper it is presented that some reasons why BAN logic is in practice unsound are not idealization problems, but problems what some basic rules result in. F...
Based on BAN s basic constructs and rules, the freshness in BAN logic is investigated. In this paper it is presented that some reasons why BAN logic is in practice unsound are not idealization problems, but problems what some basic rules result in. F...
2000, 22(3): 509-512.
Abstract:
How to distribute a secret key information to n authorized departments(denoted as: S1, S2Sn, respectively).For every autherized department Si(#em/em#=1, 2,, n), there are qi authorized persons,and every authorized person has the same secret key infor...
How to distribute a secret key information to n authorized departments(denoted as: S1, S2Sn, respectively).For every autherized department Si(#em/em#=1, 2,, n), there are qi authorized persons,and every authorized person has the same secret key infor...
2000, 22(3): 513-516.
Abstract:
In order to recover the statistically imdependent source signals，the paper proposes a novel blind beam-forming approach based on two-order statistics．In this method，the source signals are extracted by the statistic properties of the zero cross-correl...
In order to recover the statistically imdependent source signals，the paper proposes a novel blind beam-forming approach based on two-order statistics．In this method，the source signals are extracted by the statistic properties of the zero cross-correl...
2000, 22(3): 517-521.
Abstract:
The multi-layer perceptron is introduced to characterize the microstrip line．The size of microstrip line and the frequency are defined as the input saples of the multi-layer perceptron，and the electric characteristic parameters of the microstrip，whic...
The multi-layer perceptron is introduced to characterize the microstrip line．The size of microstrip line and the frequency are defined as the input saples of the multi-layer perceptron，and the electric characteristic parameters of the microstrip，whic...
2000, 22(3): 522-525.
Abstract:
The solution of the electromagnetic field is given for TE mode in a infinite long fan-shaped waveguide. The basic principle of a rotating mode filter with fan-shaped waveguide is presented. The design method for the filter is discussed by a practical...
The solution of the electromagnetic field is given for TE mode in a infinite long fan-shaped waveguide. The basic principle of a rotating mode filter with fan-shaped waveguide is presented. The design method for the filter is discussed by a practical...
2000, 22(3): 526-528.
Abstract:
In this paper，the impedance matching problem of the circular waveguide latching ferrite variable polarizer has been studied，a method of calculating the impedance matching of the circular waveguide latching ferrite variable polarizer has been presente...
In this paper，the impedance matching problem of the circular waveguide latching ferrite variable polarizer has been studied，a method of calculating the impedance matching of the circular waveguide latching ferrite variable polarizer has been presente...
2000, 22(3): 496-504.
Abstract:
In recent years,the researches on combination of wavelet analysis and neural net works have attracted much attention.This paper reviews the development and status about this field.The combination of wavelet and neural networks can be categorizde into...
In recent years,the researches on combination of wavelet analysis and neural net works have attracted much attention.This paper reviews the development and status about this field.The combination of wavelet and neural networks can be categorizde into...
