Email alert
2002 Vol. 24, No. 10
Display Method:
2002, 24(10): 1297-1303.
Abstract:
Independent component analysis aims to find a linearly transformation to coordinates in which the data are maximally statistical independent. In the method, by using the independent vector basis, the mixed signal will be decomposed to the independent...
Independent component analysis aims to find a linearly transformation to coordinates in which the data are maximally statistical independent. In the method, by using the independent vector basis, the mixed signal will be decomposed to the independent...
2002, 24(10): 1304-1309.
Abstract:
In this paper, researches are deep done on using PCNN-pulse coupled neural network, a new artificial neural network based on biology, to reduce binary images noise and smooth images. Meanwhile, the image restoration algorithm based on PCNN is brought...
In this paper, researches are deep done on using PCNN-pulse coupled neural network, a new artificial neural network based on biology, to reduce binary images noise and smooth images. Meanwhile, the image restoration algorithm based on PCNN is brought...
2002, 24(10): 1310-1315.
Abstract:
This paper presents a new strategy for efficiently coding stereo video sequences. In the scheme, the auxiliary sequence is coded by disparity compensated prediction and 3D-SPIHT algorithm. 3D-SPIHT algorithm is based on genuine 3D wavelet transform, ...
This paper presents a new strategy for efficiently coding stereo video sequences. In the scheme, the auxiliary sequence is coded by disparity compensated prediction and 3D-SPIHT algorithm. 3D-SPIHT algorithm is based on genuine 3D wavelet transform, ...
2002, 24(10): 1316-1320.
Abstract:
A fast codebook training algorithm without the computation of distortion by the property of centroid sequence convergence is presented in this paper. The performance of the new algorithm is tested by typical test image Lena. The result shows that the...
A fast codebook training algorithm without the computation of distortion by the property of centroid sequence convergence is presented in this paper. The performance of the new algorithm is tested by typical test image Lena. The result shows that the...
2002, 24(10): 1321-1328.
Abstract:
As an effective method to provide copyright protection for digital media, digital watermarking has drawn extensive attention recently. By inserting the signature watermarking DCT coefficients into some middle-high frequency range DCT coefficients of ...
As an effective method to provide copyright protection for digital media, digital watermarking has drawn extensive attention recently. By inserting the signature watermarking DCT coefficients into some middle-high frequency range DCT coefficients of ...
2002, 24(10): 1329-1333.
Abstract:
The subimaging target recognition system of infrared rosette scanning is the main optimal terminal guidance system, however, the resolution of the imaging space is not high. Based on the optimal controlling rule of scanning parameter, this paper prop...
The subimaging target recognition system of infrared rosette scanning is the main optimal terminal guidance system, however, the resolution of the imaging space is not high. Based on the optimal controlling rule of scanning parameter, this paper prop...
2002, 24(10): 1334-1340.
Abstract:
As the rank of Volterra adaptive filter interferes with predictive performance, how to determine the optimal rank of Volterra adaptive filter becomes a key problem in practical prediction. Using theory of phase space reconstruction, this paper derive...
As the rank of Volterra adaptive filter interferes with predictive performance, how to determine the optimal rank of Volterra adaptive filter becomes a key problem in practical prediction. Using theory of phase space reconstruction, this paper derive...
2002, 24(10): 1341-1345.
Abstract:
In this paper, stability losing of periodic solution and chaotic phenomenon in a simplest neuron equation with time delay are studied, The numerical simulations show that a new chaotic source is found in a first order nonlinear dynamical system. Some...
In this paper, stability losing of periodic solution and chaotic phenomenon in a simplest neuron equation with time delay are studied, The numerical simulations show that a new chaotic source is found in a first order nonlinear dynamical system. Some...
2002, 24(10): 1346-1351.
Abstract:
It is very difficult to resolve multiple jammers in the mainlobe of a passive monopulse radar. This paper discusses monopulse radar response to noise frequency modulation (FM) jamming. By means of selecting proper receiver bandwidth, it makes jamming...
It is very difficult to resolve multiple jammers in the mainlobe of a passive monopulse radar. This paper discusses monopulse radar response to noise frequency modulation (FM) jamming. By means of selecting proper receiver bandwidth, it makes jamming...
2002, 24(10): 1352-1357.
Abstract:
The imaging method on low-altitude target in strong ground clutter is presented. The identical amount of stretching time-delay with the adjoined echoes is applied in the signal stretching process, and then the ground clutter is filtered through the o...
The imaging method on low-altitude target in strong ground clutter is presented. The identical amount of stretching time-delay with the adjoined echoes is applied in the signal stretching process, and then the ground clutter is filtered through the o...
2002, 24(10): 1358-1365.
Abstract:
In this pa per, the characteristics of communication electronic warfare and communication interception information (CI2) are analyzed concisely. IFS/CI2: an intelligent fusion system of CI2 is introduced. The fusion model and key methods are discusse...
In this pa per, the characteristics of communication electronic warfare and communication interception information (CI2) are analyzed concisely. IFS/CI2: an intelligent fusion system of CI2 is introduced. The fusion model and key methods are discusse...
2002, 24(10): 1366-1371.
Abstract:
This paper presents a new method of designing an interleaver for turbo codes, which is termed as Golden-spread interleaver. This method fits for designing interleavers of arbitrary length. The principle and process are detailed with the analysis of a...
This paper presents a new method of designing an interleaver for turbo codes, which is termed as Golden-spread interleaver. This method fits for designing interleavers of arbitrary length. The principle and process are detailed with the analysis of a...
2002, 24(10): 1372-1377.
Abstract:
Code Division Multiple Access (CDMA) is an effective technique to support radio multimedia service. This paper presents an analysis on the uplink capacity of a multimedia CDMA system under multicell environment. The effect of the users maximum transm...
Code Division Multiple Access (CDMA) is an effective technique to support radio multimedia service. This paper presents an analysis on the uplink capacity of a multimedia CDMA system under multicell environment. The effect of the users maximum transm...
2002, 24(10): 1378-1384.
Abstract:
In this paper, the co-channel interference on the downlink channel of the MC-CDMA cellular system is investigated. The analytic formula of the co-channel interference is induced. The downlink channel performance of the MC-CDMA cellular system with co...
In this paper, the co-channel interference on the downlink channel of the MC-CDMA cellular system is investigated. The analytic formula of the co-channel interference is induced. The downlink channel performance of the MC-CDMA cellular system with co...
2002, 24(10): 1385-1390.
Abstract:
This paper presents a new method of fast code acquisition under low SNR, and large Doppler shift condition. The method gives decision base on the peak existence in the spectral of instant correlation between the local code and the zero-IF received si...
This paper presents a new method of fast code acquisition under low SNR, and large Doppler shift condition. The method gives decision base on the peak existence in the spectral of instant correlation between the local code and the zero-IF received si...
2002, 24(10): 1391-1397.
Abstract:
In this paper, an algorithm based on the packet drop history in RED is presented, aimed at solving the problem that the bandwidth is not balancedly allocated to responsive and unresponsive flows in today s Internet. This algorithm is able to detect h...
In this paper, an algorithm based on the packet drop history in RED is presented, aimed at solving the problem that the bandwidth is not balancedly allocated to responsive and unresponsive flows in today s Internet. This algorithm is able to detect h...
2002, 24(10): 1398-1404.
Abstract:
For enlarging the capacities of WDM star networks free from the number of limited wavelengths, a scheme of reusing wavelengths twice is proposed in this paper. According to the scheme, not only the number of nodes can be increased twice, but also all...
For enlarging the capacities of WDM star networks free from the number of limited wavelengths, a scheme of reusing wavelengths twice is proposed in this paper. According to the scheme, not only the number of nodes can be increased twice, but also all...
2002, 24(10): 1405-1411.
Abstract:
A normalized two dimensional band-limited Weierstrass fractal function is used for modeling the rough surface. Based on Kirchhoff theory, an analytic solution of the average electromagnetic scattering field and the variance of scattering intensity ar...
A normalized two dimensional band-limited Weierstrass fractal function is used for modeling the rough surface. Based on Kirchhoff theory, an analytic solution of the average electromagnetic scattering field and the variance of scattering intensity ar...
2002, 24(10): 1412-1417.
Abstract:
An integralization design method in the antenna and feed system of active phased array for low side lobe is presented in this paper. From some main rsepects detail how to do the integral design. Some experiments have been done on the 248 elements ant...
An integralization design method in the antenna and feed system of active phased array for low side lobe is presented in this paper. From some main rsepects detail how to do the integral design. Some experiments have been done on the 248 elements ant...
2002, 24(10): 1418-1423.
Abstract:
In this paper, a more efficient FDTD algorithm, with the Gilbert s equation of motion being discretized directly, is introduced for the analysis of the RCS of a microstrip patch on an arbitrarily biased ferrite substrate. Some new techniques are adop...
In this paper, a more efficient FDTD algorithm, with the Gilbert s equation of motion being discretized directly, is introduced for the analysis of the RCS of a microstrip patch on an arbitrarily biased ferrite substrate. Some new techniques are adop...
2002, 24(10): 1424-1427.
Abstract:
This paper applies a multiple population Genetic Algorithm (GA) to solving the TSP (Traveling Salesman Problem). Different populations apply different mutation factors to achieve different search objects. The transition factor among the groups is use...
This paper applies a multiple population Genetic Algorithm (GA) to solving the TSP (Traveling Salesman Problem). Different populations apply different mutation factors to achieve different search objects. The transition factor among the groups is use...
2002, 24(10): 1428-1432.
Abstract:
In this paper, chaotic synchronization in a coupled system of neuron model with discrete time delay is studied. A chaotic system of neuron model with discrete time delay is sensitive to the continuous initial function. For arbitrary activate function...
In this paper, chaotic synchronization in a coupled system of neuron model with discrete time delay is studied. A chaotic system of neuron model with discrete time delay is sensitive to the continuous initial function. For arbitrary activate function...
2002, 24(10): 1433-1436.
Abstract:
Ray-tracing technique is an efficient method to analyse the propagation in urban and indoor environment, but there are still many questions which need to be studied while realizing. In this paper, octatree technique which was first used in computer g...
Ray-tracing technique is an efficient method to analyse the propagation in urban and indoor environment, but there are still many questions which need to be studied while realizing. In this paper, octatree technique which was first used in computer g...
2002, 24(10): 1437-1440.
Abstract:
In this paper, Coifman intervallic scaling functions are used as basis and testing functions in the moment method solution of electromagnetic field integral equation. The number of numerical integral is reduced with the help of the vanishing moment o...
In this paper, Coifman intervallic scaling functions are used as basis and testing functions in the moment method solution of electromagnetic field integral equation. The number of numerical integral is reduced with the help of the vanishing moment o...
