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2000 Vol. 22, No. 5
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2000, 22(5): 705-714.
Abstract:
In order to improve the tracking performance of local sensors in distributed multisensor data fusion systems,this paper discusses the state estimation technique of multisensor tracking with feedback information.Based on the single sensor Kalman filte...
In order to improve the tracking performance of local sensors in distributed multisensor data fusion systems,this paper discusses the state estimation technique of multisensor tracking with feedback information.Based on the single sensor Kalman filte...
2000, 22(5): 715-722.
Abstract:
This paper deals with estimating the rigid bodiesmotion parameters from token correspondence between two perspective views.Total least square(TLS)method is used to solve the linear equations of motion estimation.Then a minor component analysis (MCA)n...
This paper deals with estimating the rigid bodiesmotion parameters from token correspondence between two perspective views.Total least square(TLS)method is used to solve the linear equations of motion estimation.Then a minor component analysis (MCA)n...
2000, 22(5): 723-728.
Abstract:
The paper deals with the spectrum features,the fractal characteristics of the shipradiated noise,and researches the relationship between them;also,it takes advantage of them to distinguish the types of the ships.At the same time,a fuzzy neural networ...
The paper deals with the spectrum features,the fractal characteristics of the shipradiated noise,and researches the relationship between them;also,it takes advantage of them to distinguish the types of the ships.At the same time,a fuzzy neural networ...
2000, 22(5): 729-734.
Abstract:
In this paper, the continuous time recurrent neural network is proposed to solve the functional minimization problem, which is often involved in estimation and control. At first, the continuous time BPTT algorithm corresponding to the problem is pres...
In this paper, the continuous time recurrent neural network is proposed to solve the functional minimization problem, which is often involved in estimation and control. At first, the continuous time BPTT algorithm corresponding to the problem is pres...
2000, 22(5): 735-740.
Abstract:
Super resolution Algorithms can be used to obtain high resolution in ISAR imaging.But in the case of maneuvering target,the Doppler frequency of received signal scattered by target will not be constant,and these algorithms always suffer from the sign...
Super resolution Algorithms can be used to obtain high resolution in ISAR imaging.But in the case of maneuvering target,the Doppler frequency of received signal scattered by target will not be constant,and these algorithms always suffer from the sign...
2000, 22(5): 741-746.
Abstract:
With adoption of the hopped-frequency pulses as a radar waveform for imaging targets,a novel algorithm for range-Doppler imaging of rotating targets is proposed.Compared with the stepped-frequency radar Fourier transform(FT) imaging algorithm,the alg...
With adoption of the hopped-frequency pulses as a radar waveform for imaging targets,a novel algorithm for range-Doppler imaging of rotating targets is proposed.Compared with the stepped-frequency radar Fourier transform(FT) imaging algorithm,the alg...
2000, 22(5): 747-752.
Abstract:
This paper analyzes the distributed OS-CFAR detection with noncoherent integration of multiple pulses under the conditions of nonhomogeneous background and two local detectors.Compared with the monopulse detection and the single sensor detector and t...
This paper analyzes the distributed OS-CFAR detection with noncoherent integration of multiple pulses under the conditions of nonhomogeneous background and two local detectors.Compared with the monopulse detection and the single sensor detector and t...
2000, 22(5): 753-758.
Abstract:
This paper presents an iterative instantaneous frequency estimation based on a cross localized Wigner-Ville distribution(X-LWVD). The convergence of this method is examined analytically and the performance in noise is compared with the peak detection...
This paper presents an iterative instantaneous frequency estimation based on a cross localized Wigner-Ville distribution(X-LWVD). The convergence of this method is examined analytically and the performance in noise is compared with the peak detection...
2000, 22(5): 759-767.
Abstract:
A method of multiple parameters estimation for multiple chirp signals is proposed,a brief performance analysis is also described.Compared with references,the computational load of the method is more attractive,it is favorable to realize for real-time...
A method of multiple parameters estimation for multiple chirp signals is proposed,a brief performance analysis is also described.Compared with references,the computational load of the method is more attractive,it is favorable to realize for real-time...
2000, 22(5): 768-774.
Abstract:
A kind of parallel structure of the FIR filter is gotten by expressing the polynomial signal as the parallel form in this paper.By analyzing the parallel structure of FIR filter,several kinds of parallel processing algorithms of the adaptive FIR filt...
A kind of parallel structure of the FIR filter is gotten by expressing the polynomial signal as the parallel form in this paper.By analyzing the parallel structure of FIR filter,several kinds of parallel processing algorithms of the adaptive FIR filt...
2000, 22(5): 775-779.
Abstract:
This paper discusses the combination method of the optimal array based on the maximum signal to noise ratio principle and multi-user detection technique,and proves in theory that the code error rate of the new method is far superior to the sole multi...
This paper discusses the combination method of the optimal array based on the maximum signal to noise ratio principle and multi-user detection technique,and proves in theory that the code error rate of the new method is far superior to the sole multi...
2000, 22(5): 780-784.
Abstract:
In this paper,the wavelet-based fractal block image coding is introduced.A new oriented zerotree wavelet-based fractal image coding is presented through the combination of zerotree wavelet and fractal image coding.Experimental results show that the p...
In this paper,the wavelet-based fractal block image coding is introduced.A new oriented zerotree wavelet-based fractal image coding is presented through the combination of zerotree wavelet and fractal image coding.Experimental results show that the p...
2000, 22(5): 785-790.
Abstract:
Both Otsu method and KSW entropic thresholding segmentation method are implemented using Genetic Algorithm(GA) in this paper. Optimum parameters suitable for the image segmentation algorithm are also devised. Single thresholding and multithresholding...
Both Otsu method and KSW entropic thresholding segmentation method are implemented using Genetic Algorithm(GA) in this paper. Optimum parameters suitable for the image segmentation algorithm are also devised. Single thresholding and multithresholding...
2000, 22(5): 791-798.
Abstract:
Two-band continuous time wavelets can be obtained from infinite-level binary tree-structured QMF banks.Similarly,two-band discrete time wavelet transform can be represented as a finite-level binary tree-structured QMF banks.In this paper,two-band dis...
Two-band continuous time wavelets can be obtained from infinite-level binary tree-structured QMF banks.Similarly,two-band discrete time wavelet transform can be represented as a finite-level binary tree-structured QMF banks.In this paper,two-band dis...
2000, 22(5): 799-805.
Abstract:
A statistical characteristics model of empirical VBR MPEG-I video streams is presented in this paper. Based on fractional Gaussian noise process, an self-similar model approach which models directly both the short-range dependence and long-range depe...
A statistical characteristics model of empirical VBR MPEG-I video streams is presented in this paper. Based on fractional Gaussian noise process, an self-similar model approach which models directly both the short-range dependence and long-range depe...
2000, 22(5): 806-810.
Abstract:
On the base of a finite state sequential machine, the well known Cariolaro s algorithm is used, namely the transition probability matrix method, to analyze the power spectrum of 8B/10B line code used in gigabit ethernet, and to give the closed-form s...
On the base of a finite state sequential machine, the well known Cariolaro s algorithm is used, namely the transition probability matrix method, to analyze the power spectrum of 8B/10B line code used in gigabit ethernet, and to give the closed-form s...
2000, 22(5): 811-816.
Abstract:
As a result of the rising demand for services and the resulting increase in size,bandwidth and complexity,fault management in todays high speed communication networks is becoming even more difficult.When a network problem or failure occurs,it is poss...
As a result of the rising demand for services and the resulting increase in size,bandwidth and complexity,fault management in todays high speed communication networks is becoming even more difficult.When a network problem or failure occurs,it is poss...
2000, 22(5): 817-823.
Abstract:
In this paper, a decorrelator for multiuser detection derived from ML criteria in CDMA system is proposed for frequency selective fading channels. Simulations prove the better performance of this method than the method proposed by Zvonar in which the...
In this paper, a decorrelator for multiuser detection derived from ML criteria in CDMA system is proposed for frequency selective fading channels. Simulations prove the better performance of this method than the method proposed by Zvonar in which the...
2000, 22(5): 824-830.
Abstract:
This paper systematically introduces how to find secure elliptic curves with the help of Weil theorem, and proposes an algorithm to find base points in the curves. Finally, an efficient method of finding the trace of any element in GF(2lk), which is ...
This paper systematically introduces how to find secure elliptic curves with the help of Weil theorem, and proposes an algorithm to find base points in the curves. Finally, an efficient method of finding the trace of any element in GF(2lk), which is ...
2000, 22(5): 831-835.
Abstract:
In this paper, the constructions for the families of Bent complementary functions (BCF) are further studied. Recursive construction methods of BCFs are given by using matrices with orthogonal columns and perfect arrays.
In this paper, the constructions for the families of Bent complementary functions (BCF) are further studied. Recursive construction methods of BCFs are given by using matrices with orthogonal columns and perfect arrays.
2000, 22(5): 836-841.
Abstract:
This paper gives an improved MBELP speech coding algorithm at 2.4kb/s.Compared with conventional MBELP algorithm,this algorithm has some improvements on pitch estimation and unvoice/voice decision.The synthetical speech of vocoder based on this algor...
This paper gives an improved MBELP speech coding algorithm at 2.4kb/s.Compared with conventional MBELP algorithm,this algorithm has some improvements on pitch estimation and unvoice/voice decision.The synthetical speech of vocoder based on this algor...
2000, 22(5): 842-846.
Abstract:
By analyzing the switching characteristic of the multiple- transistor and combining its features of emit-input, emit-output and high working speed, a ternary double-edge-triggered flip-flops is designed in the paper. Computer simulation shows that th...
By analyzing the switching characteristic of the multiple- transistor and combining its features of emit-input, emit-output and high working speed, a ternary double-edge-triggered flip-flops is designed in the paper. Computer simulation shows that th...
2000, 22(5): 847-853.
Abstract:
A fast generalized algorithm for S parameter extraction of 3-D microwave structures is presented based on the 3-D FDFD (Frequency Domain Finite Difference) method in conjunction with the asymptotic waveform evaluation (AWE) technique.In the AWE techn...
A fast generalized algorithm for S parameter extraction of 3-D microwave structures is presented based on the 3-D FDFD (Frequency Domain Finite Difference) method in conjunction with the asymptotic waveform evaluation (AWE) technique.In the AWE techn...
2000, 22(5): 854-857.
Abstract:
The scattering matrix, which describes the scattering property of practical scatters, is generally a function of time. So, the scattered electromagnetic wave is no longer a completely polarized wave, but a partially polarized wave, although the incid...
The scattering matrix, which describes the scattering property of practical scatters, is generally a function of time. So, the scattered electromagnetic wave is no longer a completely polarized wave, but a partially polarized wave, although the incid...
2000, 22(5): 865-870.
Abstract:
Since self-similarity is a common property of traffic in the broadband networks,it is crucial to consider its impact on network management and traffic control.Nowadays,research on self-similar traffic control has been widely noticed.Some results prov...
Since self-similarity is a common property of traffic in the broadband networks,it is crucial to consider its impact on network management and traffic control.Nowadays,research on self-similar traffic control has been widely noticed.Some results prov...
2000, 22(5): 871-874.
Abstract:
The influences of supporting dielectric layers on the transmission properties of FSS with Y slot array embeded in the dielectric are studied in this paper. The frequency properties (resonance frequency, transmission bandwidth and transmission loss ar...
The influences of supporting dielectric layers on the transmission properties of FSS with Y slot array embeded in the dielectric are studied in this paper. The frequency properties (resonance frequency, transmission bandwidth and transmission loss ar...
2000, 22(5): 875-880.
Abstract:
The problem of scattering of a Gaussian beam by a rough dielectric surface is studied. By using the plane wave spectrum expansion and Kirchhoff approximation theory, the formulas of scattered field and the incoherent scattering cross-section for Gaus...
The problem of scattering of a Gaussian beam by a rough dielectric surface is studied. By using the plane wave spectrum expansion and Kirchhoff approximation theory, the formulas of scattered field and the incoherent scattering cross-section for Gaus...
2000, 22(5): 858-864.
Abstract:
Qi Ming and others recently analyzed and discussed the security of two kinds of the ElGamal signature schemes and the password authentication scheme based on two kinds of the signature schemes,and proposed two kinds of improved schemes.This paper fir...
Qi Ming and others recently analyzed and discussed the security of two kinds of the ElGamal signature schemes and the password authentication scheme based on two kinds of the signature schemes,and proposed two kinds of improved schemes.This paper fir...
