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2001 Vol. 23, No. 12
Display Method:
2001, 23(12): 1249-1255.
Abstract:
Meeting the application requirements of wideband radar optical region target recognition, this paper presents a simple and effective frequency-domain recognition method. First, two kinds of waves called backscattering amplitude wave and phase feature...
Meeting the application requirements of wideband radar optical region target recognition, this paper presents a simple and effective frequency-domain recognition method. First, two kinds of waves called backscattering amplitude wave and phase feature...
2001, 23(12): 1256-1263.
Abstract:
The ambiguity is one of the most important facts that influence the quality of SAR images. In the process of designing a spaceborne polarimetric SAR system it is required to restrain the system ambiguity and improve the image quality effectively. Alt...
The ambiguity is one of the most important facts that influence the quality of SAR images. In the process of designing a spaceborne polarimetric SAR system it is required to restrain the system ambiguity and improve the image quality effectively. Alt...
2001, 23(12): 1264-1270.
Abstract:
In this paper, a spectral analysis method is presented to assess the quality of Synthetic Aperture Radar(SAR) image whose raw data is non-linear coding compressed. Usually, it is assumed that the SAR raw data compression will result in the reduction ...
In this paper, a spectral analysis method is presented to assess the quality of Synthetic Aperture Radar(SAR) image whose raw data is non-linear coding compressed. Usually, it is assumed that the SAR raw data compression will result in the reduction ...
2001, 23(12): 1271-1277.
Abstract:
ISAR imaging of airplane has been researched thoroughly in China. But research on ISAR imaging for ship, which is also very important in national defense, is very little. Although the difference is little in principle between airplane imaging and shi...
ISAR imaging of airplane has been researched thoroughly in China. But research on ISAR imaging for ship, which is also very important in national defense, is very little. Although the difference is little in principle between airplane imaging and shi...
2001, 23(12): 1278-1283.
Abstract:
The MTI performance in non-Gaussian type clutter such as cubic and square clutter PSD (Power Spectrum Density) environments is analyzed. The up limit curves of the average improvement factor are given. Results show that the MTI performance in cubic o...
The MTI performance in non-Gaussian type clutter such as cubic and square clutter PSD (Power Spectrum Density) environments is analyzed. The up limit curves of the average improvement factor are given. Results show that the MTI performance in cubic o...
2001, 23(12): 1284-1291.
Abstract:
This paper studies the optional effective methods for clutter suppression and platform motion compensation in Heliborne Battlefield Surveillance Radar (HBSR), which includes the traditional DPCA method, -ADPCA method, -STAP method, -STAP method with ...
This paper studies the optional effective methods for clutter suppression and platform motion compensation in Heliborne Battlefield Surveillance Radar (HBSR), which includes the traditional DPCA method, -ADPCA method, -STAP method, -STAP method with ...
2001, 23(12): 1292-1297.
Abstract:
A realization of the interface reverberation simulation based on the network model in presented. The brief introduction, main operational steps and simulation results about the interface reverberation are given. Then the statistic characteristics, th...
A realization of the interface reverberation simulation based on the network model in presented. The brief introduction, main operational steps and simulation results about the interface reverberation are given. Then the statistic characteristics, th...
2001, 23(12): 1298-1302.
Abstract:
Based on evolutionary programming, a novel algorithm named EPANN for designing the topology and weight distributions of feedforward networks is proposed in this paper. EPANN algorithm evolves network architectures and connection weights (including bi...
Based on evolutionary programming, a novel algorithm named EPANN for designing the topology and weight distributions of feedforward networks is proposed in this paper. EPANN algorithm evolves network architectures and connection weights (including bi...
2001, 23(12): 1303-1310.
Abstract:
This paper presents an efficient algorithm for voice over packet switching system using the digital speech interpolation (DSI) technique. More than twice of the interpolation gain (IG) can be obtained by applying DSI to the voice channel. The adaptab...
This paper presents an efficient algorithm for voice over packet switching system using the digital speech interpolation (DSI) technique. More than twice of the interpolation gain (IG) can be obtained by applying DSI to the voice channel. The adaptab...
2001, 23(12): 1311-1315.
Abstract:
In this paper the nonlinear least squares solution for signal-pole estimation is offered. The condition of optimization contented in its structure is both sufficient and necessary, thus the point of convergence is sole.
In this paper the nonlinear least squares solution for signal-pole estimation is offered. The condition of optimization contented in its structure is both sufficient and necessary, thus the point of convergence is sole.
2001, 23(12): 1316-1320.
Abstract:
A new DCT-based information hiding algorithm is presented in this paper. The excellent features of the new method are: (1) the difference between the carrier image containing the secret and the original one is perceptually invisible; (2) the embedded...
A new DCT-based information hiding algorithm is presented in this paper. The excellent features of the new method are: (1) the difference between the carrier image containing the secret and the original one is perceptually invisible; (2) the embedded...
2001, 23(12): 1321-1325.
Abstract:
In this paper, an improved algorithm combining optical flow field with labeling field is presented for estimating the two-dimension motion. Based on the basic constraint and the global smooth constraint, a labeling field is introduced, by which Horn-...
In this paper, an improved algorithm combining optical flow field with labeling field is presented for estimating the two-dimension motion. Based on the basic constraint and the global smooth constraint, a labeling field is introduced, by which Horn-...
2001, 23(12): 1326-1332.
Abstract:
This paper presents a new adaptive multilevel median filter based on direction information measure to solve the contradiction between noise attenuation and image details-preserving (edge-preserving). Direction is one of nature distinctions between no...
This paper presents a new adaptive multilevel median filter based on direction information measure to solve the contradiction between noise attenuation and image details-preserving (edge-preserving). Direction is one of nature distinctions between no...
2001, 23(12): 1333-1339.
Abstract:
In this paper, a general method for synthesizing the voltage data in electrical impedance tomography is presented. Based on this, a method for eliminating the reciprocity noises in measured voltages is proposed. This method can be used to eliminate t...
In this paper, a general method for synthesizing the voltage data in electrical impedance tomography is presented. Based on this, a method for eliminating the reciprocity noises in measured voltages is proposed. This method can be used to eliminate t...
2001, 23(12): 1340-1347.
Abstract:
In this paper, logarithm MAP algorithm used for turbo iterative decoding is analyzed and deduced. Based on the characteristic of turbo coding and decoding and the analysis of branch metric in the trellis, methods of simplifying computation of branch ...
In this paper, logarithm MAP algorithm used for turbo iterative decoding is analyzed and deduced. Based on the characteristic of turbo coding and decoding and the analysis of branch metric in the trellis, methods of simplifying computation of branch ...
2001, 23(12): 1348-1355.
Abstract:
The throughput and fairness of EPD and PPD schemes are studies in the environment of heterogeneous traffic and in the environment of time-varying available bandwidth. The queuing system with EPD algorithm gives higher goodput to the sources near it, ...
The throughput and fairness of EPD and PPD schemes are studies in the environment of heterogeneous traffic and in the environment of time-varying available bandwidth. The queuing system with EPD algorithm gives higher goodput to the sources near it, ...
2001, 23(12): 1356-1364.
Abstract:
This paper proposed and created an intelligent task allocating and load balancing model based on PVM in cluster of workstations-ITALBM, which introduced knowledge processing and multi-agent in DAI to the traditional task allocating and load banlancin...
This paper proposed and created an intelligent task allocating and load balancing model based on PVM in cluster of workstations-ITALBM, which introduced knowledge processing and multi-agent in DAI to the traditional task allocating and load banlancin...
2001, 23(12): 1365-1371.
Abstract:
This paper reviews the SDH SHR, summarily depicts the architecture of U-SHR. Two APS methods of U-SHR are compared. Finally, this paper addresses the problems of lowering the cost of ADM device, timing manners in the U-SHR and working mode of the net...
This paper reviews the SDH SHR, summarily depicts the architecture of U-SHR. Two APS methods of U-SHR are compared. Finally, this paper addresses the problems of lowering the cost of ADM device, timing manners in the U-SHR and working mode of the net...
2001, 23(12): 1372-1376.
Abstract:
A novel Digital Phase-Tracking Loop(DPTL) thoroughly eliminating hangup effect in high SNR is proposed to fulfil fast phase acquisition. The theory of finite Markov chains is utilized to evaluate the phase acquisition time in the presence of additive...
A novel Digital Phase-Tracking Loop(DPTL) thoroughly eliminating hangup effect in high SNR is proposed to fulfil fast phase acquisition. The theory of finite Markov chains is utilized to evaluate the phase acquisition time in the presence of additive...
2001, 23(12): 1377-1383.
Abstract:
A secure and efficient multi-round electronic auction scheme is presented using a new secret sharing scheme and the technique of signcryption. In this scheme, all bidder s bidding values are always kept secret except for the winner s. The technique o...
A secure and efficient multi-round electronic auction scheme is presented using a new secret sharing scheme and the technique of signcryption. In this scheme, all bidder s bidding values are always kept secret except for the winner s. The technique o...
2001, 23(12): 1384-1389.
Abstract:
Power control is an effective approach to overcome near-far problem, reduce intercell interference and increase system capacity in code division multiple access (CDMA) mobile communication systems. At the same time, power control can provide differen...
Power control is an effective approach to overcome near-far problem, reduce intercell interference and increase system capacity in code division multiple access (CDMA) mobile communication systems. At the same time, power control can provide differen...
2001, 23(12): 1390-1395.
Abstract:
Space-time channel can be described by Vector Channel Impulse Response (VCIR). Estimating and tracking the time varying VCIR is very important for smart antenna systems. In this paper an estimation and tracking method has been proposed. In this metho...
Space-time channel can be described by Vector Channel Impulse Response (VCIR). Estimating and tracking the time varying VCIR is very important for smart antenna systems. In this paper an estimation and tracking method has been proposed. In this metho...
2001, 23(12): 1396-1402.
Abstract:
In this paper, a new multicarrier MC-CDMA system is proposed. Comparing with the conventional MC-CDMA system, the difference is that transmitted data bits are serial to parallel converted to a number of parallel branches first, then each branch is mo...
In this paper, a new multicarrier MC-CDMA system is proposed. Comparing with the conventional MC-CDMA system, the difference is that transmitted data bits are serial to parallel converted to a number of parallel branches first, then each branch is mo...
2001, 23(12): 1403-1410.
Abstract:
Currently, most papers that study the effect of wavelength translation on WDM network usually aim at single-fiber network and do not consider the requirement of network survivability. This paper studies network performance of multi-fiber WDM mesh net...
Currently, most papers that study the effect of wavelength translation on WDM network usually aim at single-fiber network and do not consider the requirement of network survivability. This paper studies network performance of multi-fiber WDM mesh net...
2001, 23(12): 1411-1416.
Abstract:
In this paper, Finite Difference Time Domain(FDTD) method is used to calculate the radiation characteristics of the antenna located on loss ground. For FDTD method, there are different feed models to calculate the input impendence of antenna. The res...
In this paper, Finite Difference Time Domain(FDTD) method is used to calculate the radiation characteristics of the antenna located on loss ground. For FDTD method, there are different feed models to calculate the input impendence of antenna. The res...
2001, 23(12): 1417-1422.
Abstract:
A HYBRID algorithm is presented for the planar near-field diagnostic measurement based on plane-wave spectra and equivalent magnetic currents. With the main computational formulae given, the algorithm is proved to be accurate and effective by the use...
A HYBRID algorithm is presented for the planar near-field diagnostic measurement based on plane-wave spectra and equivalent magnetic currents. With the main computational formulae given, the algorithm is proved to be accurate and effective by the use...
2001, 23(12): 1423-1426.
Abstract:
The induced pulse current by EMP on cable that is connected to electric system threatens seriously the system. In this paper, the influence of conductivity and permittivity of plane ground on this current is calculated by FDTD method. The relationshi...
The induced pulse current by EMP on cable that is connected to electric system threatens seriously the system. In this paper, the influence of conductivity and permittivity of plane ground on this current is calculated by FDTD method. The relationshi...
2001, 23(12): 1434-1437.
Abstract:
This paper deals with automatic object segmentation method for object-oriented video encoding. Since methods of mathematical morphology are capable of detecting geometrical features such as size, contrast, or connectivity which are important to image...
This paper deals with automatic object segmentation method for object-oriented video encoding. Since methods of mathematical morphology are capable of detecting geometrical features such as size, contrast, or connectivity which are important to image...
2001, 23(12): 1438-1440.
Abstract:
In this paper, the feasibility of real-time moving target detection using RDM is verified via the estimation of its calculation. The project of moving target imaging based on RDM for LSAR is also proposed.
In this paper, the feasibility of real-time moving target detection using RDM is verified via the estimation of its calculation. The project of moving target imaging based on RDM for LSAR is also proposed.
2001, 23(12): 1427-1433.
Abstract:
In many problems, it is of interest to analyze and recognize the phenomena occurring at different scales. The recently introduced multiscale framework offers the possibility of such an analysis. In this paper; the development of the multiscale system...
In many problems, it is of interest to analyze and recognize the phenomena occurring at different scales. The recently introduced multiscale framework offers the possibility of such an analysis. In this paper; the development of the multiscale system...
