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2004 Vol. 26, No. 11
Display Method:
2004, 26(11): 1681-1685.
Abstract:
To evaluate and calculate the capacity of information hiding system is a crucial topic of the field. From the point of view of the coding theory and set theory, this paper suggest a methodology for calculating the capacity of information hiding syste...
To evaluate and calculate the capacity of information hiding system is a crucial topic of the field. From the point of view of the coding theory and set theory, this paper suggest a methodology for calculating the capacity of information hiding syste...
2004, 26(11): 1686-1692.
Abstract:
A nonlinear multiscalc pyramidal decomposition based on median transform is presented in this paper at first. Then it gives a denoising algorithm which can restore the image distorted by impidse noise and Gaussian noise. The coefficients of the image...
A nonlinear multiscalc pyramidal decomposition based on median transform is presented in this paper at first. Then it gives a denoising algorithm which can restore the image distorted by impidse noise and Gaussian noise. The coefficients of the image...
2004, 26(11): 1693-1699.
Abstract:
An algorithm of dominant color extraction in DGT domain based on MPEG7 is described in this paper, which proposes an efficient and fast method to extract the dominant color feature from the compressed bit streams. As a part of the algorithm, a method...
An algorithm of dominant color extraction in DGT domain based on MPEG7 is described in this paper, which proposes an efficient and fast method to extract the dominant color feature from the compressed bit streams. As a part of the algorithm, a method...
2004, 26(11): 1700-1705.
Abstract:
Aimed at the difficult problem for detecting distant small target with very low SNR, the proposed method of target detection based on multi-sensor multi-level information fusion consists of two parts: The feature level fusion and the decision fusion....
Aimed at the difficult problem for detecting distant small target with very low SNR, the proposed method of target detection based on multi-sensor multi-level information fusion consists of two parts: The feature level fusion and the decision fusion....
2004, 26(11): 1706-1713.
Abstract:
This paper reviews several typical techniques of multi-modal image registra-tion, exposures the relationship among them, and offers a full analysis and comparison using numerical examples. The techniques analyzed in this paper include the ones using ...
This paper reviews several typical techniques of multi-modal image registra-tion, exposures the relationship among them, and offers a full analysis and comparison using numerical examples. The techniques analyzed in this paper include the ones using ...
2004, 26(11): 1714-1720.
Abstract:
Automatic speech recognition in telecommunications environment still has a lower correct rate compared to its desktop pairs. Improving the performance of telephone-quality speech recognition is an urgent problem for its application in those practical...
Automatic speech recognition in telecommunications environment still has a lower correct rate compared to its desktop pairs. Improving the performance of telephone-quality speech recognition is an urgent problem for its application in those practical...
2004, 26(11): 1721-1727.
Abstract:
This paper mainly studies how to extract the common structure and process methods of expectation from scene-specified expectation setting, then puts forbh the algo-rithms to build expectation model suitable for dialogue systems based on the task mode...
This paper mainly studies how to extract the common structure and process methods of expectation from scene-specified expectation setting, then puts forbh the algo-rithms to build expectation model suitable for dialogue systems based on the task mode...
2004, 26(11): 1728-1732.
Abstract:
This paper presents the construction of compactly supported, interpolating or-thogonal multiwavelet based on wavelet sampling theorem. With the new interpolation orthogonal multiwavelet base, wavelet coefficients in the multiresolution representation...
This paper presents the construction of compactly supported, interpolating or-thogonal multiwavelet based on wavelet sampling theorem. With the new interpolation orthogonal multiwavelet base, wavelet coefficients in the multiresolution representation...
2004, 26(11): 1733-1737.
Abstract:
noise, which is added to the received signals are analyzed. And the idea of applying median filtering algorithm to nonlinear frequency estimation is proposed. At the same time, Monte Carlo simulation is used to validate the idea. The results show tha...
noise, which is added to the received signals are analyzed. And the idea of applying median filtering algorithm to nonlinear frequency estimation is proposed. At the same time, Monte Carlo simulation is used to validate the idea. The results show tha...
2004, 26(11): 1738-1745.
Abstract:
In this paper, initial assumption of SAR pixel distribution is derived from H/a classifier. Then a Maximum Likelihood (ML) method is introduced to improve the classifi-cation.. The backscattering properties of a natural medium, that varies with the o...
In this paper, initial assumption of SAR pixel distribution is derived from H/a classifier. Then a Maximum Likelihood (ML) method is introduced to improve the classifi-cation.. The backscattering properties of a natural medium, that varies with the o...
2004, 26(11): 1746-1751.
Abstract:
On the basis of the space geometry relation of .space-borne Synthetic AportiuC Radar(SAR), its Doppler parameters formulation is built in this paper. Taking fclio earth rotation and oblateness into consideration, the orbit perturbation, attitude erro...
On the basis of the space geometry relation of .space-borne Synthetic AportiuC Radar(SAR), its Doppler parameters formulation is built in this paper. Taking fclio earth rotation and oblateness into consideration, the orbit perturbation, attitude erro...
2004, 26(11): 1752-1757.
Abstract:
Velocity and acceleration of target are regard as these of the most important features in real and artificial warhead recognition for ballistic missile defence phased array radar, and also are used as the necessary information for velocity compensati...
Velocity and acceleration of target are regard as these of the most important features in real and artificial warhead recognition for ballistic missile defence phased array radar, and also are used as the necessary information for velocity compensati...
2004, 26(11): 1758-1765.
Abstract:
Three-channel adaptive biorthogonal filterbanks via lifting scheme aro investi-gated. Using the subband coding gain as the criterion in design, starting from an arbitrary filterbank (orthonormal or biorthogonal), three-channel biorthogonal filterbank...
Three-channel adaptive biorthogonal filterbanks via lifting scheme aro investi-gated. Using the subband coding gain as the criterion in design, starting from an arbitrary filterbank (orthonormal or biorthogonal), three-channel biorthogonal filterbank...
2004, 26(11): 1766-1770.
Abstract:
This paper discusses the mirror image interference in direct digital waveform synthesis. The formation and distribution characteristics of mirror images are illuminated, and the impact of sampling rate which brings mirror image interference is analyz...
This paper discusses the mirror image interference in direct digital waveform synthesis. The formation and distribution characteristics of mirror images are illuminated, and the impact of sampling rate which brings mirror image interference is analyz...
2004, 26(11): 1771-1777.
Abstract:
For the received signals were sampled at a fixed rate that is asynchronous with the data clock in software radio, we implement symbol synchronization during the process of decimation which replace general methods by using an interpolator in the baseb...
For the received signals were sampled at a fixed rate that is asynchronous with the data clock in software radio, we implement symbol synchronization during the process of decimation which replace general methods by using an interpolator in the baseb...
2004, 26(11): 1778-1782.
Abstract:
In this paper, an algebraic method for the construction of regular Low Density Parity Check (LDPC) codes without short cycles is proposed. By this method, the regular LDPC codes with 8-girth can be constructed. Simulation results show that these code...
In this paper, an algebraic method for the construction of regular Low Density Parity Check (LDPC) codes without short cycles is proposed. By this method, the regular LDPC codes with 8-girth can be constructed. Simulation results show that these code...
2004, 26(11): 1783-1786.
Abstract:
An initial reconstruction algorithm is given for the generalized self-shrinking sequences using the ideas of the guessing attack. The result shows that: (1) when both the characteristic polynomial of the Linear Feedback Shift Register (LFSR) and the ...
An initial reconstruction algorithm is given for the generalized self-shrinking sequences using the ideas of the guessing attack. The result shows that: (1) when both the characteristic polynomial of the Linear Feedback Shift Register (LFSR) and the ...
2004, 26(11): 1787-1791.
Abstract:
Cryptographically strong sequences not only should have a large linear com-plexity, but also no a significant decrease of the linear complexity when a few terms are changed. This requirement leads to the concept of the /c-error linear complexity of p...
Cryptographically strong sequences not only should have a large linear com-plexity, but also no a significant decrease of the linear complexity when a few terms are changed. This requirement leads to the concept of the /c-error linear complexity of p...
2004, 26(11): 1792-1798.
Abstract:
This paper discusses the routing and handover issue hi the NGSO rosette satel-lite constellations equipped with Inter-Satellite Links (ISL). Based on the variation regular-ity of the rosette constellation topology, a novel routing strategy named circ...
This paper discusses the routing and handover issue hi the NGSO rosette satel-lite constellations equipped with Inter-Satellite Links (ISL). Based on the variation regular-ity of the rosette constellation topology, a novel routing strategy named circ...
2004, 26(11): 1799-1804.
Abstract:
In this paper, a space-time coded MIMO (Multiple-Input Multiple-Output) OFDM (Orthogonal Frequency Diversion Multiplexing) system using frequency spread cod-ing is proposed based on the fact that the fading effects of the transmitted signals on each ...
In this paper, a space-time coded MIMO (Multiple-Input Multiple-Output) OFDM (Orthogonal Frequency Diversion Multiplexing) system using frequency spread cod-ing is proposed based on the fact that the fading effects of the transmitted signals on each ...
2004, 26(11): 1805-1811.
Abstract:
The tradeoff between performance and complexity must he taken into account in channels estimation algorithm of wireless OFDM systems. This paper proposes a new algorithm for channel estimation in wireless OFDM systems, which aims at reducing the conv...
The tradeoff between performance and complexity must he taken into account in channels estimation algorithm of wireless OFDM systems. This paper proposes a new algorithm for channel estimation in wireless OFDM systems, which aims at reducing the conv...
2004, 26(11): 1812-1818.
Abstract:
This paper proposes two new switch architectures that are more flexible and cost effective than the methods introduced in the literatures. For a given packet loss probability requirement, the resiilts demonstrate that (1) for non-bursty traffic, non-...
This paper proposes two new switch architectures that are more flexible and cost effective than the methods introduced in the literatures. For a given packet loss probability requirement, the resiilts demonstrate that (1) for non-bursty traffic, non-...
2004, 26(11): 1819-1824.
Abstract:
In this paper, A kind of shared restoration mechanism of optical network based on signaling control is discussed in detail, and the implementation scheme using the exist-ing protocol is presented. It is proved by experimentation that the shared mecha...
In this paper, A kind of shared restoration mechanism of optical network based on signaling control is discussed in detail, and the implementation scheme using the exist-ing protocol is presented. It is proved by experimentation that the shared mecha...
2004, 26(11): 1825-1829.
Abstract:
An algorithm based on Clonal Strategies(CS) is presented to deal with the delay-constrained and least-cost multicast routing problem known as NP-complet. Simulations show that compared with those based on genetic algorithm, the multicast routing base...
An algorithm based on Clonal Strategies(CS) is presented to deal with the delay-constrained and least-cost multicast routing problem known as NP-complet. Simulations show that compared with those based on genetic algorithm, the multicast routing base...
2004, 26(11): 1830-1836.
Abstract:
CORBA has provided a set of Common Object Services (COS), which help users to build large-scale distributed applications, but Common Object Services Specifications (COSS) do not include integrated formal description. Petri nets are a powerful instrum...
CORBA has provided a set of Common Object Services (COS), which help users to build large-scale distributed applications, but Common Object Services Specifications (COSS) do not include integrated formal description. Petri nets are a powerful instrum...
2004, 26(11): 1837-1842.
Abstract:
To accurately estimate multi-section traffic states of freeway, a new multi-section error state equations are built up. In the new model, error propagations of both the traffic density and the average velocity are considered and the extended Kalman f...
To accurately estimate multi-section traffic states of freeway, a new multi-section error state equations are built up. In the new model, error propagations of both the traffic density and the average velocity are considered and the extended Kalman f...
2004, 26(11): 1843-1848.
Abstract:
Based on code division multiple access and amicable orthogonal design, a non-coherent space-time transmission scheme is proposed for multiple-antenna systems, which allows full-diversity communication and is resistant to multiuser interference. Then ...
Based on code division multiple access and amicable orthogonal design, a non-coherent space-time transmission scheme is proposed for multiple-antenna systems, which allows full-diversity communication and is resistant to multiuser interference. Then ...
