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2003 Vol. 25, No. 10
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2003, 25(10): 1297-1301.
Abstract:
In this paper, SAR ATR (Synthetic Aperture Radar Automatic Target Recogni-tion) approach based on KPCA (Kernel Principal Component Analysis) is proposed. KPCA first maps the input data into some feature space using kernel functions and then performs ...
In this paper, SAR ATR (Synthetic Aperture Radar Automatic Target Recogni-tion) approach based on KPCA (Kernel Principal Component Analysis) is proposed. KPCA first maps the input data into some feature space using kernel functions and then performs ...
2003, 25(10): 1302-1307.
Abstract:
This paper presents a new SAR raw data simulation method that is used to test and analyze the algorithm of moving target detection. The simulated SAR raw data are generated by superimposing the simulation moving target echo to a real background refle...
This paper presents a new SAR raw data simulation method that is used to test and analyze the algorithm of moving target detection. The simulated SAR raw data are generated by superimposing the simulation moving target echo to a real background refle...
2003, 25(10): 1308-1315.
Abstract:
Based on the forward-squint-looking SAR mode of SAR system, this paper gives the mathematical model of SAR echo signal, and carefully analyses the instantaneous azimuth frequency , the instantaneous Doppler frequency component of the azimuth frequenc...
Based on the forward-squint-looking SAR mode of SAR system, this paper gives the mathematical model of SAR echo signal, and carefully analyses the instantaneous azimuth frequency , the instantaneous Doppler frequency component of the azimuth frequenc...
2003, 25(10): 1316-1320.
Abstract:
The simulation of radio holographic signal for moving objects acts an important role in the study of the target imaging and recognition in the research of the SISAR. A gener-alized expression is induced on the basis of analyzing the relation between ...
The simulation of radio holographic signal for moving objects acts an important role in the study of the target imaging and recognition in the research of the SISAR. A gener-alized expression is induced on the basis of analyzing the relation between ...
2003, 25(10): 1321-1326.
Abstract:
Bayesian network is a new inference and express method of uncertain knowledge. It is proposed an inference and express technique for remote sensing imagery data which has complexity and uncertainty based on Bayesian Network Model(BNM). In the paper, ...
Bayesian network is a new inference and express method of uncertain knowledge. It is proposed an inference and express technique for remote sensing imagery data which has complexity and uncertainty based on Bayesian Network Model(BNM). In the paper, ...
2003, 25(10): 1327-1333.
Abstract:
A new method for analyzing nonstationary signal designated as local wave analysis is introduced. It stems from the concept of instantaneous frequency, and it can describe accu-rately the local properties of dynamic data in the time-frequency plane. T...
A new method for analyzing nonstationary signal designated as local wave analysis is introduced. It stems from the concept of instantaneous frequency, and it can describe accu-rately the local properties of dynamic data in the time-frequency plane. T...
2003, 25(10): 1334-1340.
Abstract:
In this paper, a fast recursive algorithm for the 2D sliding rectangular window FFT is proposed, based on the relationship of neighbor windows and the transformation property of the FFT. Further, the fast recursive algorithm is extended into 2D Gabor...
In this paper, a fast recursive algorithm for the 2D sliding rectangular window FFT is proposed, based on the relationship of neighbor windows and the transformation property of the FFT. Further, the fast recursive algorithm is extended into 2D Gabor...
2003, 25(10): 1341-1348.
Abstract:
Most existing content-based image retrieval systems using low-level features that could not describe high-level semantics thoroughly and accurately. In this paper, a novel system for content-based image retrieval is designed and created, which combin...
Most existing content-based image retrieval systems using low-level features that could not describe high-level semantics thoroughly and accurately. In this paper, a novel system for content-based image retrieval is designed and created, which combin...
2003, 25(10): 1349-1354.
Abstract:
A digital watermark is an invisible mark embedded in digital images,video or audio documentSjWhich may be used for a number of different purposes including copyright protec-tion,authentication and captioning, In this paper, an effective adaptive wate...
A digital watermark is an invisible mark embedded in digital images,video or audio documentSjWhich may be used for a number of different purposes including copyright protec-tion,authentication and captioning, In this paper, an effective adaptive wate...
2003, 25(10): 1355-1360.
Abstract:
To reduce the incorrect association rate using NN (Nearest, Neighbor) algorithm in complex environment in clutter, a new plot-track association algorithm-Approximate Multi-Sensor multi-target Joint Probabilistic Data Association (AMSJPDA) is presente...
To reduce the incorrect association rate using NN (Nearest, Neighbor) algorithm in complex environment in clutter, a new plot-track association algorithm-Approximate Multi-Sensor multi-target Joint Probabilistic Data Association (AMSJPDA) is presente...
2003, 25(10): 1361-1366.
Abstract:
In this paper, the existence, uniqueness and global exponential stability of the equilibrium point of a class of Hopfield neural networks are investigated by using Liapunov direct method. Lipschitz continuous activations are considered and the limit ...
In this paper, the existence, uniqueness and global exponential stability of the equilibrium point of a class of Hopfield neural networks are investigated by using Liapunov direct method. Lipschitz continuous activations are considered and the limit ...
2003, 25(10): 1367-1372.
Abstract:
This paper presents a novel method based on Tabu algorithm to design the fi-nite wordlength FIR digital niters, which is a deterministic paralell optimization algorithm simulating human intelligence. Firstly, Tabu algorithm is detailedly described an...
This paper presents a novel method based on Tabu algorithm to design the fi-nite wordlength FIR digital niters, which is a deterministic paralell optimization algorithm simulating human intelligence. Firstly, Tabu algorithm is detailedly described an...
2003, 25(10): 1373-1378.
Abstract:
A channel estimation scheme, using measured autocorrelation coefficients as weighting coefficients of the channel processor, and its error performance in equation are presented in this paper. Error performance of moving averaging channel estimation i...
A channel estimation scheme, using measured autocorrelation coefficients as weighting coefficients of the channel processor, and its error performance in equation are presented in this paper. Error performance of moving averaging channel estimation i...
2003, 25(10): 1379-1385.
Abstract:
SIR-based preamble detection is investigated under multipath fading condition. Two-antenna receiver is designed for the random access channel and common packet channel in WCDMA uplink. The preamble detection performance is derived and closed-form exp...
SIR-based preamble detection is investigated under multipath fading condition. Two-antenna receiver is designed for the random access channel and common packet channel in WCDMA uplink. The preamble detection performance is derived and closed-form exp...
2003, 25(10): 1386-1391.
Abstract:
The performance of Turbo Product Coded Pilot Symbol Assisted Modulation (TPC-PSAM) system is studied and a novel method to improve the performance of TPC-PSAM in Rayleigh fading channels by clipping the soft input information of decoder is presented ...
The performance of Turbo Product Coded Pilot Symbol Assisted Modulation (TPC-PSAM) system is studied and a novel method to improve the performance of TPC-PSAM in Rayleigh fading channels by clipping the soft input information of decoder is presented ...
2003, 25(10): 1392-1397.
Abstract:
This paper presents the effect of carrier phase error on MC-CDMA performance in downlink mobile communications. Signal-to-Noise Ratio (SNR) and Bit-Error-Rate (BER.) is analyzed taking into account the effect, of carrier phase error. It is shown that...
This paper presents the effect of carrier phase error on MC-CDMA performance in downlink mobile communications. Signal-to-Noise Ratio (SNR) and Bit-Error-Rate (BER.) is analyzed taking into account the effect, of carrier phase error. It is shown that...
2003, 25(10): 1398-1402.
Abstract:
This paper presents the probability model of the control-choice cryptographic logic. A necessery and sufficient condition is gained which satisfies that the mutual information is zero between control and output sequences of the control-choice cryptog...
This paper presents the probability model of the control-choice cryptographic logic. A necessery and sufficient condition is gained which satisfies that the mutual information is zero between control and output sequences of the control-choice cryptog...
2003, 25(10): 1403-1410.
Abstract:
A static routing algorithm which applied in traffic ungiiiooring environment is put, forward. This algorithm calculates and configures the path of LSP by taking the1 current network resource into account. When needing to configure more than one LSPs ...
A static routing algorithm which applied in traffic ungiiiooring environment is put, forward. This algorithm calculates and configures the path of LSP by taking the1 current network resource into account. When needing to configure more than one LSPs ...
2003, 25(10): 1411-1417.
Abstract:
According to the management requirements of connection service in multitech-nology networks environment, a connection service management framework based on Telecom Operations Map(TOM) is proposed, which achieves the automation of the configuration an...
According to the management requirements of connection service in multitech-nology networks environment, a connection service management framework based on Telecom Operations Map(TOM) is proposed, which achieves the automation of the configuration an...
2003, 25(10): 1418-1424.
Abstract:
The dispersion equation of the axial symmetric hybrid mode inside the helix with a partially filled plasma column is derived, its dispersion curves are calculated, and the conditions to form that mode are illustrated. The effect of confining magnetic...
The dispersion equation of the axial symmetric hybrid mode inside the helix with a partially filled plasma column is derived, its dispersion curves are calculated, and the conditions to form that mode are illustrated. The effect of confining magnetic...
2003, 25(10): 1425-1429.
Abstract:
Wide swath SAR is a hotspot of the research of SAR (Synthetic Aperture Radar). In many fields of SAR application which require global and dynamic surveillance or frequent surveillance of a certain part of the earth surface, it is expected that the sw...
Wide swath SAR is a hotspot of the research of SAR (Synthetic Aperture Radar). In many fields of SAR application which require global and dynamic surveillance or frequent surveillance of a certain part of the earth surface, it is expected that the sw...
2003, 25(10): 1436-1440.
Abstract:
A new symmetrical formulation without O(1/R2) singularity is presented to cal-culate the impedance matrix elements as long as the rooftop basis functions have the character of local continuity. With this new formulation, one needs only take care abou...
A new symmetrical formulation without O(1/R2) singularity is presented to cal-culate the impedance matrix elements as long as the rooftop basis functions have the character of local continuity. With this new formulation, one needs only take care abou...
2003, 25(10): 1430-1435.
Abstract:
With same circular radiating antenna, same center frequency pulse, the analytical and numerical results of axial energy of several typical waveform pulse are offered by electromagnetic theory. The results indicate: in the slow decaying area, the axia...
With same circular radiating antenna, same center frequency pulse, the analytical and numerical results of axial energy of several typical waveform pulse are offered by electromagnetic theory. The results indicate: in the slow decaying area, the axia...
