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2002 Vol. 24, No. 4
Display Method:
2002, 24(4): 433-438.
Abstract:
Based on video editing model, several important characteristics that can be used for detecting fade and dissolve, such as the variance, edge intensity, Effective Average gradient (EAG) and Double Chromatic Difference (DCD) of video sequence are deriv...
Based on video editing model, several important characteristics that can be used for detecting fade and dissolve, such as the variance, edge intensity, Effective Average gradient (EAG) and Double Chromatic Difference (DCD) of video sequence are deriv...
2002, 24(4): 439-444.
Abstract:
In this paper, a new medical image coding algorithm is reported. This type of algorithm is called interframe predictive coding of medical image using a wavelet transform for motion compensated estimation. Simulation results show that this new algorit...
In this paper, a new medical image coding algorithm is reported. This type of algorithm is called interframe predictive coding of medical image using a wavelet transform for motion compensated estimation. Simulation results show that this new algorit...
2002, 24(4): 445-449.
Abstract:
Among the wavelet image coding algorithms, SPIHT is the most well-known coding algorithm because of its outstanding preformance. But it needs too many memories for hardware implementation. LZC reduces the requirement of memory as well as its preforma...
Among the wavelet image coding algorithms, SPIHT is the most well-known coding algorithm because of its outstanding preformance. But it needs too many memories for hardware implementation. LZC reduces the requirement of memory as well as its preforma...
2002, 24(4): 450-454.
Abstract:
A new approach is presented for the task assignment in multi-station multi-satellite data reception mission management systems by applying the optimal assignment algorithm in c.ombinatorial mathematics based upon the definition of satellite data rece...
A new approach is presented for the task assignment in multi-station multi-satellite data reception mission management systems by applying the optimal assignment algorithm in c.ombinatorial mathematics based upon the definition of satellite data rece...
2002, 24(4): 455-460.
Abstract:
The eigenspace-based multiple constrained minimum variance beamformer (EMCMVB) is presented here, which combines the multiple constrained minimum variance beamformer (MCMBV) with the eigenspace-based beamformer. Coherent interference can be suppresse...
The eigenspace-based multiple constrained minimum variance beamformer (EMCMVB) is presented here, which combines the multiple constrained minimum variance beamformer (MCMBV) with the eigenspace-based beamformer. Coherent interference can be suppresse...
2002, 24(4): 461-466.
Abstract:
A novel class of nonlinear adaptive active noise cancellation filter-sigmoid-based Volterra adaptive active noise cancellation filter is introduced. The normalized data and instantaneous error LMS algorithm is modified to update the coefficients of t...
A novel class of nonlinear adaptive active noise cancellation filter-sigmoid-based Volterra adaptive active noise cancellation filter is introduced. The normalized data and instantaneous error LMS algorithm is modified to update the coefficients of t...
2002, 24(4): 467-472.
Abstract:
In this paper, a new frequency-domain DAPSK+OFDM is proposed. Its modulation and demodulation are discussed, and its BER performance is analysed in AWGN channel. In the case f the typical AM channel, the simulation results indicate that the BER perfo...
In this paper, a new frequency-domain DAPSK+OFDM is proposed. Its modulation and demodulation are discussed, and its BER performance is analysed in AWGN channel. In the case f the typical AM channel, the simulation results indicate that the BER perfo...
2002, 24(4): 473-478.
Abstract:
A squaring method to find the maximal-ratio receive combining scheme of the orthogonal space-time block codes is presented. Furthermore, it is proved that this method can be used as a general method for the orthogonal space-time block codes. Consider...
A squaring method to find the maximal-ratio receive combining scheme of the orthogonal space-time block codes is presented. Furthermore, it is proved that this method can be used as a general method for the orthogonal space-time block codes. Consider...
2002, 24(4): 479-485.
Abstract:
In this paper, the problem of stability for the cellular neural networks(CNNs) with delay is studied. Two types of sufficient conditions for global asymptotic stability of cellular neural networks with delay are obtained by means of Lyapunov function...
In this paper, the problem of stability for the cellular neural networks(CNNs) with delay is studied. Two types of sufficient conditions for global asymptotic stability of cellular neural networks with delay are obtained by means of Lyapunov function...
2002, 24(4): 486-491.
Abstract:
Lifting scheme, which is a new approach of constructing the second-generation wavelets, can also be used to construct first-generation ones. Compared with Daubechiess construction approach, lifting scheme can easily be grasped by readers who are not ...
Lifting scheme, which is a new approach of constructing the second-generation wavelets, can also be used to construct first-generation ones. Compared with Daubechiess construction approach, lifting scheme can easily be grasped by readers who are not ...
2002, 24(4): 492-498.
Abstract:
This paper deals with the influence induced by multipath propagation and optimal selection of M/N when frequency diversity technique is used. To ensure the detection statistic and choose the correct M and N, it must be known that the probability dens...
This paper deals with the influence induced by multipath propagation and optimal selection of M/N when frequency diversity technique is used. To ensure the detection statistic and choose the correct M and N, it must be known that the probability dens...
2002, 24(4): 499-506.
Abstract:
This paper derives the ideal AGC(Automatic Gain Control) algorithm for SAR system from the statistical model of SAR echoes. Compared with the conventional algorithm, the two methods have both advantages and disadvantages. The conventional method is m...
This paper derives the ideal AGC(Automatic Gain Control) algorithm for SAR system from the statistical model of SAR echoes. Compared with the conventional algorithm, the two methods have both advantages and disadvantages. The conventional method is m...
2002, 24(4): 507-513.
Abstract:
Based on the multiplication speckle model, the statistical characteristics of the polarimetric signatures are analyzed,which include co-polar and cross-polar ratios and co-polar phase difference for multi-look polarimetric SAR data. With the simulate...
Based on the multiplication speckle model, the statistical characteristics of the polarimetric signatures are analyzed,which include co-polar and cross-polar ratios and co-polar phase difference for multi-look polarimetric SAR data. With the simulate...
2002, 24(4): 514-519.
Abstract:
A new airborne slow-moving target detection method for mechanically scanned antennas is analyzed in detail. Compared with conventional DPCA technology under engineering conditions, the method is easily realized and its performance is higher than that...
A new airborne slow-moving target detection method for mechanically scanned antennas is analyzed in detail. Compared with conventional DPCA technology under engineering conditions, the method is easily realized and its performance is higher than that...
2002, 24(4): 520-526.
Abstract:
Passive-star Time-Wavelength Division Multiplexing (TWDM) is an attractive technology suitable for very high speed large capacity communication. One of its key issues is to find a minimum frame length with arbitrary traffic pattern and arbitrary tuni...
Passive-star Time-Wavelength Division Multiplexing (TWDM) is an attractive technology suitable for very high speed large capacity communication. One of its key issues is to find a minimum frame length with arbitrary traffic pattern and arbitrary tuni...
2002, 24(4): 527-533.
Abstract:
In accordance with the uplink frame structure of WCDMA system, this paper develops the LS-DRMAT algorithm proposed by Z. Rong, et al.(1997) into a new algorithm named LMS-DRMAT with training sequence. The use of training sequence does not complicate ...
In accordance with the uplink frame structure of WCDMA system, this paper develops the LS-DRMAT algorithm proposed by Z. Rong, et al.(1997) into a new algorithm named LMS-DRMAT with training sequence. The use of training sequence does not complicate ...
2002, 24(4): 534-538.
Abstract:
This paper proposes a new method to exploit the symmetric structure of prototype filters and provides a practical implementation structure which can be used in FPGAs, DSPs or commercial available digital filters. In the development of WCDMA mobile co...
This paper proposes a new method to exploit the symmetric structure of prototype filters and provides a practical implementation structure which can be used in FPGAs, DSPs or commercial available digital filters. In the development of WCDMA mobile co...
2002, 24(4): 539-544.
Abstract:
In this paper, the blind multiuser detector operating over multipath fading channel with high-power Narrow Bandwidth Interference (NBI) is presented. It has the basic structure of RAKE receiver in which every path signal could be traced by MMSE optim...
In this paper, the blind multiuser detector operating over multipath fading channel with high-power Narrow Bandwidth Interference (NBI) is presented. It has the basic structure of RAKE receiver in which every path signal could be traced by MMSE optim...
2002, 24(4): 545-551.
Abstract:
This paper investigates the performance of the AAL2 packet voice multiplexer as a function of the transmission capacity of the ATM VC when the ATM VC bandwidth utilization is constant. A conclusion is drawn that packet delay and probability of packet...
This paper investigates the performance of the AAL2 packet voice multiplexer as a function of the transmission capacity of the ATM VC when the ATM VC bandwidth utilization is constant. A conclusion is drawn that packet delay and probability of packet...
2002, 24(4): 552-556.
Abstract:
Based on fourth-order cumulants, a new optimizing criterion is discussed and proven to have the global minima, while the minima satisfy the decorrelating conditions. Thereby, a new scheme for the blind multiuser detection can be obtained by solving t...
Based on fourth-order cumulants, a new optimizing criterion is discussed and proven to have the global minima, while the minima satisfy the decorrelating conditions. Thereby, a new scheme for the blind multiuser detection can be obtained by solving t...
2002, 24(4): 557-562.
Abstract:
This paper studies chaotic attractors in nonautonomous nonlinear systems. Based on the mathematical analysis and digital simulation of the Genesio system in detail, a cell model of chaotic attractor in a kind of nonautonomous systems is obtained.
This paper studies chaotic attractors in nonautonomous nonlinear systems. Based on the mathematical analysis and digital simulation of the Genesio system in detail, a cell model of chaotic attractor in a kind of nonautonomous systems is obtained.
2002, 24(4): 563-567.
Abstract:
On the basis of theory of three essential circuits elements, this paper presents a universal synthesis of bipolar circuits. The generalized binary signal to be applicable to voltagemode and current-mode circuits is introduced first. Then the simplifi...
On the basis of theory of three essential circuits elements, this paper presents a universal synthesis of bipolar circuits. The generalized binary signal to be applicable to voltagemode and current-mode circuits is introduced first. Then the simplifi...
2002, 24(4): 568-572.
Abstract:
The data transmission control schemes have the significant influences on the packet delay and system capacity. In this paper, three types of data transmission control schemes are presented and their influences on the system performance are simulated....
The data transmission control schemes have the significant influences on the packet delay and system capacity. In this paper, three types of data transmission control schemes are presented and their influences on the system performance are simulated....
2002, 24(4): 573-576.
Abstract:
This paper presents the design and implementation of system control for HDTV video decoder. The principle of the system control is described in detail too. FPGA is adopted for its programmable and reconfigurable features. The system control works per...
This paper presents the design and implementation of system control for HDTV video decoder. The principle of the system control is described in detail too. FPGA is adopted for its programmable and reconfigurable features. The system control works per...
