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2000 Vol. 22, No. 6
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2000, 22(6): 881-889.
Abstract:
How to improve the quality of service in internet networks is a hot topic at present. This paper presents an implementation algorithm-Random Early Detection with In and Out(RIO) to support differentiated services in multi-protocol label switching-bas...
How to improve the quality of service in internet networks is a hot topic at present. This paper presents an implementation algorithm-Random Early Detection with In and Out(RIO) to support differentiated services in multi-protocol label switching-bas...
2000, 22(6): 890-897.
Abstract:
To multi-station(multiqueue) cyclic service system, this paper advances a grade compound new strategy of a development adjust service quantity to fit the station load unbalance system. This paper discusses mainly about:(1) Introduce new strategy;(2) ...
To multi-station(multiqueue) cyclic service system, this paper advances a grade compound new strategy of a development adjust service quantity to fit the station load unbalance system. This paper discusses mainly about:(1) Introduce new strategy;(2) ...
2000, 22(6): 898-905.
Abstract:
Power control is of paramount important to combat the near-far problem and achieve high system capacity in CDMA cellular system. In this paper, a Modified Neural Network (MNN) based power controller is proposed to smoothen out the fast fading and kee...
Power control is of paramount important to combat the near-far problem and achieve high system capacity in CDMA cellular system. In this paper, a Modified Neural Network (MNN) based power controller is proposed to smoothen out the fast fading and kee...
2000, 22(6): 906-913.
Abstract:
This paper proposes a space-time pre-RAKE system for the downlink in TDD/DS-CDMA. The system realizes space-selective transmission and temporal pre-RAKE. Performance analysis in single- and multi-user environment is presented and the relation between...
This paper proposes a space-time pre-RAKE system for the downlink in TDD/DS-CDMA. The system realizes space-selective transmission and temporal pre-RAKE. Performance analysis in single- and multi-user environment is presented and the relation between...
2000, 22(6): 914-920.
Abstract:
Regional mobile satellite communication systems are very important for developing countries, especially for China that lacks the basic communication methods in her large rural areas. Adopting Medium Earth Orbit (MEO) constellation is an effective way...
Regional mobile satellite communication systems are very important for developing countries, especially for China that lacks the basic communication methods in her large rural areas. Adopting Medium Earth Orbit (MEO) constellation is an effective way...
2000, 22(6): 921-928.
Abstract:
The problem of identifying the parameters of the nonminimum phase FIR system from the cumulants of noisy output samples is addressed. A novel method by using higher-order cumulants is proposed with the following advantages. (1) Flexibility: the metho...
The problem of identifying the parameters of the nonminimum phase FIR system from the cumulants of noisy output samples is addressed. A novel method by using higher-order cumulants is proposed with the following advantages. (1) Flexibility: the metho...
2000, 22(6): 929-936.
Abstract:
A variable bit-rate audio coding algorithm controlled by desired audio quality is designed. This algorithm can be used to minimize the bit-rate of audio coding at a given level of audio quality.
A variable bit-rate audio coding algorithm controlled by desired audio quality is designed. This algorithm can be used to minimize the bit-rate of audio coding at a given level of audio quality.
2000, 22(6): 937-943.
Abstract:
Sub-images contain different information when the original image decomposed with wavelet. By modifying the larger wavelet coefficients of middle-high frequency range detail subimages with pseudo-random sequence of real numbers, the paper proposes a s...
Sub-images contain different information when the original image decomposed with wavelet. By modifying the larger wavelet coefficients of middle-high frequency range detail subimages with pseudo-random sequence of real numbers, the paper proposes a s...
2000, 22(6): 944-950.
Abstract:
In this paper, a constituting method of binary codes of constant weight and distance with parameters (n, 6, m)(m 6) is given. The basic structure form of this kind of codes is discussed and the subset block of basic unit which can be used to constitu...
In this paper, a constituting method of binary codes of constant weight and distance with parameters (n, 6, m)(m 6) is given. The basic structure form of this kind of codes is discussed and the subset block of basic unit which can be used to constitu...
2000, 22(6): 951-958.
Abstract:
Each submodel of a half plane compound Gauss-Markov model, which is identified by a line process, is suitable for describing stationary or nonstationary DVF(displacement vector field); In order to determine the a priori distribution of these submodel...
Each submodel of a half plane compound Gauss-Markov model, which is identified by a line process, is suitable for describing stationary or nonstationary DVF(displacement vector field); In order to determine the a priori distribution of these submodel...
2000, 22(6): 959-964.
Abstract:
A fuzzy controller based on the distance between two fuzzy sets is proposed in this article. First, a definition of distance between two fuzzy sets is proposed. This definition is different from traditional ones for its dependent on the cardinal numb...
A fuzzy controller based on the distance between two fuzzy sets is proposed in this article. First, a definition of distance between two fuzzy sets is proposed. This definition is different from traditional ones for its dependent on the cardinal numb...
2000, 22(6): 965-971.
Abstract:
The architecture and learning algorithm of traditional radial basis function (RBF) neural networks are surveyed in this paper. A generalized radial basis function model is proposed, which is more flexible and extensible. Based on the numerical soluti...
The architecture and learning algorithm of traditional radial basis function (RBF) neural networks are surveyed in this paper. A generalized radial basis function model is proposed, which is more flexible and extensible. Based on the numerical soluti...
2000, 22(6): 972-977.
Abstract:
In this paper, Hopf bifurcation of a neural network with time delay is discussed in detail. The stability of periodic solutions is also studied by utilizing center manifold theorem. Algorithms for determining the asymptotic stability, direction of bi...
In this paper, Hopf bifurcation of a neural network with time delay is discussed in detail. The stability of periodic solutions is also studied by utilizing center manifold theorem. Algorithms for determining the asymptotic stability, direction of bi...
2000, 22(6): 978-983.
Abstract:
This paper presents a novel asymptotical stability analysis of the equilibrium points in the unit hypercube for the Brain-State-in-a-Box neural model. Some sufficient conditions for the asymptotical stability of equilibrium points are derived using O...
This paper presents a novel asymptotical stability analysis of the equilibrium points in the unit hypercube for the Brain-State-in-a-Box neural model. Some sufficient conditions for the asymptotical stability of equilibrium points are derived using O...
2000, 22(6): 984-988.
Abstract:
Foliage penetrating VHF/UHF Ultra-WideBand (UWB) SAR can image hidden man-made targets such as military vehicles with wide-angle and ultra-wideband to achieve high resolutions in both range and azimuth, which has great military application value. Exp...
Foliage penetrating VHF/UHF Ultra-WideBand (UWB) SAR can image hidden man-made targets such as military vehicles with wide-angle and ultra-wideband to achieve high resolutions in both range and azimuth, which has great military application value. Exp...
2000, 22(6): 989-993.
Abstract:
Chaotic binary sequence based on double scroll attractor is produced by Wien bridge in this paper. Effects of the circuit parameters on the stochastic distribution properties and the correlation property of the proposed binary sequence are analyzed b...
Chaotic binary sequence based on double scroll attractor is produced by Wien bridge in this paper. Effects of the circuit parameters on the stochastic distribution properties and the correlation property of the proposed binary sequence are analyzed b...
2000, 22(6): 994-1000.
Abstract:
In this paper, the polarization degree of the target return in the optics region is investigated, on the basis of polarimetric and high-resolution radar system. The property is described by means of distribution parameter, the recognition of four kin...
In this paper, the polarization degree of the target return in the optics region is investigated, on the basis of polarimetric and high-resolution radar system. The property is described by means of distribution parameter, the recognition of four kin...
2000, 22(6): 1001-1006.
Abstract:
In theory, it is possible to synthesize any frequency response curve with the recursive MTI(Moving Target Indication) filters. As a result, the applied field of this kind of filter is wide. A new design method is presented to design flexibly a recurs...
In theory, it is possible to synthesize any frequency response curve with the recursive MTI(Moving Target Indication) filters. As a result, the applied field of this kind of filter is wide. A new design method is presented to design flexibly a recurs...
2000, 22(6): 1007-1015.
Abstract:
In this paper, a Fast Multipole Method (FMM) is developed to solving the scattered fields from three dimensional (3D) inhomogeneous dielectric scatterers. This generalized FMM is applied to the volume integral equation (3DV-FMM). The discrete formula...
In this paper, a Fast Multipole Method (FMM) is developed to solving the scattered fields from three dimensional (3D) inhomogeneous dielectric scatterers. This generalized FMM is applied to the volume integral equation (3DV-FMM). The discrete formula...
2000, 22(6): 1016-1021.
Abstract:
An efficient time signals prediction method combined with two-dimensional finite difference time domain (2D-FDTD) method has been proposed for the performance parameters computation of uniform microwave transmission lines. This hybrid method is espec...
An efficient time signals prediction method combined with two-dimensional finite difference time domain (2D-FDTD) method has been proposed for the performance parameters computation of uniform microwave transmission lines. This hybrid method is espec...
2000, 22(6): 1022-1027.
Abstract:
The TEM cell is limited in the upper useful test frequency but GHz TEM (GTEM) cell permits to overcome this restriction. This paper analyzes the transmisssion characteristics in GTEM cell using FDTD method in the nonorthogonal coordinate. The field d...
The TEM cell is limited in the upper useful test frequency but GHz TEM (GTEM) cell permits to overcome this restriction. This paper analyzes the transmisssion characteristics in GTEM cell using FDTD method in the nonorthogonal coordinate. The field d...
2000, 22(6): 1038-1040.
Abstract:
This paper analyses several key technologies of system control unit in the HDTV video decoder, and a hardware implementing method is given as well.
This paper analyses several key technologies of system control unit in the HDTV video decoder, and a hardware implementing method is given as well.
2000, 22(6): 1041-1045.
Abstract:
In this paper, the temporol-spatial coupling problem about antenna radiating and receiving of impulse signal SAR is analysed. Using back projection method, an impulse signal SAR imaging algorithm, antenna size how affects the impulse signal SAR azimu...
In this paper, the temporol-spatial coupling problem about antenna radiating and receiving of impulse signal SAR is analysed. Using back projection method, an impulse signal SAR imaging algorithm, antenna size how affects the impulse signal SAR azimu...
2000, 22(6): 1028-1037.
Abstract:
Markov random field methodology is a new noticeable research field in computer vision. In this paper, a general analysis framework and relative references of MRF modelbased methodology are presented, the approaches for image segmentation and restorat...
Markov random field methodology is a new noticeable research field in computer vision. In this paper, a general analysis framework and relative references of MRF modelbased methodology are presented, the approaches for image segmentation and restorat...
