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2002 Vol. 24, No. 8
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2002, 24(8): 1009-1016.
Abstract:
A new automatic video sequence segmentation algorithm that extracts moving objects is presented in this paper. The algorithm exploits the local variation in the L~*u~*v~* space, and combines it with motion information to separate foreground objects f...
A new automatic video sequence segmentation algorithm that extracts moving objects is presented in this paper. The algorithm exploits the local variation in the L~*u~*v~* space, and combines it with motion information to separate foreground objects f...
2002, 24(8): 1017-1021.
Abstract:
Possibilistic partition coefficient which based on possibilistic distribution descriptor has decreasing tendency as the classification number increasing and does not directly relate to the geometry structure of data set. To consider the geometry stru...
Possibilistic partition coefficient which based on possibilistic distribution descriptor has decreasing tendency as the classification number increasing and does not directly relate to the geometry structure of data set. To consider the geometry stru...
2002, 24(8): 1022-1027.
Abstract:
The LMS algorithm is widely used in various signal processing fields such as radar, communication, etc. due to its simplicity. It is a focus in the research on the implementation of the high-speed adaptive filter. Based on the parallel pipelined LMS ...
The LMS algorithm is widely used in various signal processing fields such as radar, communication, etc. due to its simplicity. It is a focus in the research on the implementation of the high-speed adaptive filter. Based on the parallel pipelined LMS ...
2002, 24(8): 1028-1034.
Abstract:
In this paper , the method for designing digital filters and their implementation and application via filter banks are introduced. The design of digital Hilbert filters of each scale in dyadic wavelet filter banks is particularly discussed. Moreover,...
In this paper , the method for designing digital filters and their implementation and application via filter banks are introduced. The design of digital Hilbert filters of each scale in dyadic wavelet filter banks is particularly discussed. Moreover,...
Design of sopot two-channel perfect reconstruction fir filter banks based on evolutionary strategies
2002, 24(8): 1035-1039.
Abstract:
This paper proposes a method based on evolutionary strategies (ES) for design ofmultiplier-less two-channel perfect-reconstruction (PR) filter banks (FB). The filter banks are jbased on the modified lifting scheme structure. A new ES given a seed is ...
This paper proposes a method based on evolutionary strategies (ES) for design ofmultiplier-less two-channel perfect-reconstruction (PR) filter banks (FB). The filter banks are jbased on the modified lifting scheme structure. A new ES given a seed is ...
2002, 24(8): 1040-1048.
Abstract:
In this paper a novel method is presented to segment gray level image through maximizing the fuzzy partition entropy of two-dimensional histogram. After the concept of fuzzy partition is briefly introduced first, a new definition of fuzzy partition e...
In this paper a novel method is presented to segment gray level image through maximizing the fuzzy partition entropy of two-dimensional histogram. After the concept of fuzzy partition is briefly introduced first, a new definition of fuzzy partition e...
2002, 24(8): 1049-1053.
Abstract:
A new disturbing method for noise reduction of chaotic signal is presented, and a realizing example of this method-gradient disturbing method, is proposed. The noise-reduction capability of the gradient disturbing method for chaotic signal is experim...
A new disturbing method for noise reduction of chaotic signal is presented, and a realizing example of this method-gradient disturbing method, is proposed. The noise-reduction capability of the gradient disturbing method for chaotic signal is experim...
2002, 24(8): 1054-1059.
Abstract:
In this paper a new algorithm for estimating frequency and quality factor based on Fade aproximants is given. Because Fade approximants can accelerate the convergence of sum in the discrete Fourier transform, this algorithm is also used in the freque...
In this paper a new algorithm for estimating frequency and quality factor based on Fade aproximants is given. Because Fade approximants can accelerate the convergence of sum in the discrete Fourier transform, this algorithm is also used in the freque...
2002, 24(8): 1060-1065.
Abstract:
In this paper, the signal model of airborne SAR moving target echo is constructed firstly, which is a chirp signal naturally. According to this feature, a new technique of SAR moving target detection based on fractional Fourier transform is proposed....
In this paper, the signal model of airborne SAR moving target echo is constructed firstly, which is a chirp signal naturally. According to this feature, a new technique of SAR moving target detection based on fractional Fourier transform is proposed....
2002, 24(8): 1066-1072.
Abstract:
This paper studies the fractal characteristics of multipath fading channels and proposes a novel algorithm for the channel estimation, which is basically an MMSE estimation algorithm modified by employing fractal dimension and wavelet reconstruction ...
This paper studies the fractal characteristics of multipath fading channels and proposes a novel algorithm for the channel estimation, which is basically an MMSE estimation algorithm modified by employing fractal dimension and wavelet reconstruction ...
2002, 24(8): 1073-1079.
Abstract:
Concerning about the feature of IP traffic, this paper propose a new Priority-Based Discarding Policy (PBDP) from the view of traffic engineering, and further more gives a advanced RED algorithm PROP (Priority-based RED Discarding Policy), which comb...
Concerning about the feature of IP traffic, this paper propose a new Priority-Based Discarding Policy (PBDP) from the view of traffic engineering, and further more gives a advanced RED algorithm PROP (Priority-based RED Discarding Policy), which comb...
2002, 24(8): 1080-1087.
Abstract:
This paper presents two inter-layer hand-over models based on wireless mobile multimedia services including wide-band service and narrow-band service. One is bi-directional inter-layer hand-over model, the other is single-directional inter-layer mode...
This paper presents two inter-layer hand-over models based on wireless mobile multimedia services including wide-band service and narrow-band service. One is bi-directional inter-layer hand-over model, the other is single-directional inter-layer mode...
2002, 24(8): 1088-1095.
Abstract:
A Bit Error Probability(BEP) computation formula for binary Partial-Response Continuous-Phase Modulation(PRCPM) with Differential Phase Detection(DPD) and Maximum Ratio Combining(MRC) in composite satellite mobile channel is presented in this paper, ...
A Bit Error Probability(BEP) computation formula for binary Partial-Response Continuous-Phase Modulation(PRCPM) with Differential Phase Detection(DPD) and Maximum Ratio Combining(MRC) in composite satellite mobile channel is presented in this paper, ...
2002, 24(8): 1096-1101.
Abstract:
It is necessary to use the reference real time TOD(Time Of Date) for synchronizing a hopping sequence with long period. There is a new view that the generation of hopping codes is a process in which the special information sequences TOD are translate...
It is necessary to use the reference real time TOD(Time Of Date) for synchronizing a hopping sequence with long period. There is a new view that the generation of hopping codes is a process in which the special information sequences TOD are translate...
2002, 24(8): 1102-1108.
Abstract:
This paper simplifies the adaptive parallel interference cancellation (PIC) scheme into a ne method named soft-decision variant averaging amplitude estimation PIC technology. Relative to the adaptive PIC, the new method cuts down large amount of comp...
This paper simplifies the adaptive parallel interference cancellation (PIC) scheme into a ne method named soft-decision variant averaging amplitude estimation PIC technology. Relative to the adaptive PIC, the new method cuts down large amount of comp...
2002, 24(8): 1109-1112.
Abstract:
This paper discusses the bounds on the probability of success in impersonation and substitution attack by malicious groups of receivers for multiple authentication codes with multi-receiver, and gives out the least-size of the secret key space that t...
This paper discusses the bounds on the probability of success in impersonation and substitution attack by malicious groups of receivers for multiple authentication codes with multi-receiver, and gives out the least-size of the secret key space that t...
2002, 24(8): 1113-1119.
Abstract:
This paper proposes a new flexible method of the beam shaping based on superposition principle and the scanning principle of phased array antenna. We designed a 145cm*48cm array composed of microstrip patch elements with the wavelength of 24cm. In th...
This paper proposes a new flexible method of the beam shaping based on superposition principle and the scanning principle of phased array antenna. We designed a 145cm*48cm array composed of microstrip patch elements with the wavelength of 24cm. In th...
2002, 24(8): 1120-1125.
Abstract:
A stacked double-patch and four-layer substrate microstrip antenna with the capacitance compensation probe feed is designed by combining the experimental formulae and the full-wave method. The relative impedance bandwidth of this microstrip antenna r...
A stacked double-patch and four-layer substrate microstrip antenna with the capacitance compensation probe feed is designed by combining the experimental formulae and the full-wave method. The relative impedance bandwidth of this microstrip antenna r...
2002, 24(8): 1126-1130.
Abstract:
Considering the effect of the logitudinal uniform magnetic field, the microwave radiation produced by the interaction of a relativistic electron beam with a annular plasma is examined by use of the liner theory. In this paper the applied field approa...
Considering the effect of the logitudinal uniform magnetic field, the microwave radiation produced by the interaction of a relativistic electron beam with a annular plasma is examined by use of the liner theory. In this paper the applied field approa...
2002, 24(8): 1134-1138.
Abstract:
Most algorithms use pseudorandom sequences as watermarks, whose presence are determined according to its correlation with original sequence. In this paper an identifier (ID) watermarking algorithm is proposed, which has the characteristics of error-c...
Most algorithms use pseudorandom sequences as watermarks, whose presence are determined according to its correlation with original sequence. In this paper an identifier (ID) watermarking algorithm is proposed, which has the characteristics of error-c...
2002, 24(8): 1139-1142.
Abstract:
In this paper, a novel analysis of feedforward linearizing power amplifier is presented. Experimental results are reported for a CDMA IS-95 base station feedforward linearizing amplifier, which demonstrates a minimum of 23dB intermodulation distortio...
In this paper, a novel analysis of feedforward linearizing power amplifier is presented. Experimental results are reported for a CDMA IS-95 base station feedforward linearizing amplifier, which demonstrates a minimum of 23dB intermodulation distortio...
2002, 24(8): 1143-1147.
Abstract:
Real-time Imager can provide Synthetic Aperture Radar(SAR) image in real-time mode which is significant for airborne SAR applications such as real-time monitoring and battle reconnaissance. A SAR real-time imager usually implements SAR imaging algori...
Real-time Imager can provide Synthetic Aperture Radar(SAR) image in real-time mode which is significant for airborne SAR applications such as real-time monitoring and battle reconnaissance. A SAR real-time imager usually implements SAR imaging algori...
2002, 24(8): 1148-1152.
Abstract:
The one-dimensional Fresnel zone phase correcting principle can be applied in a cylindrical surface to constructed a new type of point source feeding lens antenna. In this paper, the auxiliary source method is used to evaluate the focused fields of t...
The one-dimensional Fresnel zone phase correcting principle can be applied in a cylindrical surface to constructed a new type of point source feeding lens antenna. In this paper, the auxiliary source method is used to evaluate the focused fields of t...
2002, 24(8): 1131-1133.
Abstract:
In this paper, it is pointed out by a counterexample that the condition of the freshness rule on BAN logic which in the paper The Investigation of the Freshness in BAN Logic written by Song Ronggong, et al. is so strict that it regards possibly a sec...
In this paper, it is pointed out by a counterexample that the condition of the freshness rule on BAN logic which in the paper The Investigation of the Freshness in BAN Logic written by Song Ronggong, et al. is so strict that it regards possibly a sec...
