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2010 Vol. 32, No. 5
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2010, 32(5): 1017-1022.
doi: 10.3724/SP.J.1146.2009.00552
Abstract:
A novel target automatic detection algorithm is proposed in this paper, and it is mainly used for the processing of the man-made targets with a relatively complex structure in natural scenes images and high-resolution remote sensing images. Based on ...
A novel target automatic detection algorithm is proposed in this paper, and it is mainly used for the processing of the man-made targets with a relatively complex structure in natural scenes images and high-resolution remote sensing images. Based on ...
2010, 32(5): 1023-1028.
doi: 10.3724/SP.J.1146.2009.01275
Abstract:
The centerline as a distinct feature in ship ISAR image, its precision affects the recognition result. In this paper, a new ship centerline extraction algorithm is presented. According to this algorithm, the ship width and centerline are together det...
The centerline as a distinct feature in ship ISAR image, its precision affects the recognition result. In this paper, a new ship centerline extraction algorithm is presented. According to this algorithm, the ship width and centerline are together det...
2010, 32(5): 1029-1033.
doi: 10.3724/SP.J.1146.2009.00737
Abstract:
In the applications of airborne multi-baseline SAR tomography, the baseline is needed to be small while the aperture is required to be large. However, it is difficult to meet the two conditions simultaneously. In this paper, the sparse signal represe...
In the applications of airborne multi-baseline SAR tomography, the baseline is needed to be small while the aperture is required to be large. However, it is difficult to meet the two conditions simultaneously. In this paper, the sparse signal represe...
2010, 32(5): 1034-1039.
doi: 10.3724/SP.J.1146.2009.00582
Abstract:
The inherent errors of radar system degrade seriously the performance of Synthetic Aperture Radar(SAR), and these errors should be calibrated to acquire high quality images. In this paper, to the issue of the impact of system errors and non-lineariti...
The inherent errors of radar system degrade seriously the performance of Synthetic Aperture Radar(SAR), and these errors should be calibrated to acquire high quality images. In this paper, to the issue of the impact of system errors and non-lineariti...
2010, 32(5): 1040-1044.
doi: 10.3724/SP.J.1146.2009.00733
Abstract:
In this paper, an algorithm for compressing SAR raw data is proposed. This algorithm is based on the combination of Discrete Cosine Transform(DCT) and Trellis Coding Quantization(TCQ). Because SAR raw data consists of mass linear frequency modulation...
In this paper, an algorithm for compressing SAR raw data is proposed. This algorithm is based on the combination of Discrete Cosine Transform(DCT) and Trellis Coding Quantization(TCQ). Because SAR raw data consists of mass linear frequency modulation...
2010, 32(5): 1045-1049.
doi: 10.3724/SP.J.1146.2009.01215
Abstract:
Adaptive Pulse Compression (APC) can effectively mitigate the mutual interference between the transmitting waveforms of Multiple-Input Multiple-Output (MIMO) radar. In this paper, APC of MIMO radar based on Multi-Stage Wiener Filter (MSWF) is propose...
Adaptive Pulse Compression (APC) can effectively mitigate the mutual interference between the transmitting waveforms of Multiple-Input Multiple-Output (MIMO) radar. In this paper, APC of MIMO radar based on Multi-Stage Wiener Filter (MSWF) is propose...
2010, 32(5): 1050-1055.
doi: 10.3724/SP.J.1146.2009.00669
Abstract:
It is important to classify and recognize ground moving targets such as armored cars. Micro-Doppler features have special advantages in identification due to the detailed information of target. The micro-Doppler features of turret and gun tube which ...
It is important to classify and recognize ground moving targets such as armored cars. Micro-Doppler features have special advantages in identification due to the detailed information of target. The micro-Doppler features of turret and gun tube which ...
2010, 32(5): 1056-1060.
doi: 10.3724/SP.J.1146.2009.00239
Abstract:
With the requirement of high resolution and wide swath, multiple-transit and multiple-receive SAR becomes a important research field, multiple apertures use the same carrier wave frequency, transit orthogonal phase coding signal is one of modes, whic...
With the requirement of high resolution and wide swath, multiple-transit and multiple-receive SAR becomes a important research field, multiple apertures use the same carrier wave frequency, transit orthogonal phase coding signal is one of modes, whic...
2010, 32(5): 1061-1065.
doi: 10.3724/SP.J.1146.2009.00577
Abstract:
The traditional image quality assessment methods based on pixels have their own limitations, such as the lack of consideration of the image structure, or the need of a complete reference image. To avoid these problems, this paper presented a new imag...
The traditional image quality assessment methods based on pixels have their own limitations, such as the lack of consideration of the image structure, or the need of a complete reference image. To avoid these problems, this paper presented a new imag...
2010, 32(5): 1066-1070.
doi: 10.3724/SP.J.1146.2009.00750
Abstract:
Based on the uniqueness condition of the solution of Nonorthogonal Joint Diagonalization (NJD), the identifiability for Blind Signal Separation (BSS) is analyzed. Firstly, it is proved that the target matrices consisting of Second-Order Statistics (S...
Based on the uniqueness condition of the solution of Nonorthogonal Joint Diagonalization (NJD), the identifiability for Blind Signal Separation (BSS) is analyzed. Firstly, it is proved that the target matrices consisting of Second-Order Statistics (S...
2010, 32(5): 1071-1076.
doi: 10.3724/SP.J.1146.2009.00513
Abstract:
For a special signal environment, where all of the sources have identical nonzero mean values, taking advantages of the Vandermonde structured steering vector of the uniform linear antenna array, an analytical solution of null-subspace is educed in t...
For a special signal environment, where all of the sources have identical nonzero mean values, taking advantages of the Vandermonde structured steering vector of the uniform linear antenna array, an analytical solution of null-subspace is educed in t...
2010, 32(5): 1077-1082.
doi: 10.3724/SP.J.1146.2009.00613
Abstract:
In the traditional characteristic waveform interpolation speech coding, the high frequency harmonics of the synthetic speech are usually lost, which makes the speech feel noisy, due to the phase information neglect of the characteristic waveform and ...
In the traditional characteristic waveform interpolation speech coding, the high frequency harmonics of the synthetic speech are usually lost, which makes the speech feel noisy, due to the phase information neglect of the characteristic waveform and ...
2010, 32(5): 1083-1087.
doi: 10.3724/SP.J.1146.2009.00574
Abstract:
For blind convolutive separation of speech signals, a cost function improved from the least squares fitting function is developed based on second-order statistic, which simplifies the quartic-function with respect to the mixture matrix into three qua...
For blind convolutive separation of speech signals, a cost function improved from the least squares fitting function is developed based on second-order statistic, which simplifies the quartic-function with respect to the mixture matrix into three qua...
2010, 32(5): 1088-1093.
doi: 10.3724/SP.J.1146.2009.00362
Abstract:
If there are obstacles in the search sea area, the heuristic search algorithm can be applied into the search process of moving underwater targets, to study the heuristic search for moving underwater targets based on Markov process in this paper. The ...
If there are obstacles in the search sea area, the heuristic search algorithm can be applied into the search process of moving underwater targets, to study the heuristic search for moving underwater targets based on Markov process in this paper. The ...
2010, 32(5): 1094-1099.
doi: 10.3724/SP.J.1146.2009.00643
Abstract:
Classical region-based geometric active contours (e.g. C-V model) only take intensity homogeneity as the similarity measure for regions, and can not obtain satisfactory segmentation results of complicated images. Thus, a fast active contour model bas...
Classical region-based geometric active contours (e.g. C-V model) only take intensity homogeneity as the similarity measure for regions, and can not obtain satisfactory segmentation results of complicated images. Thus, a fast active contour model bas...
2010, 32(5): 1100-1104.
doi: 10.3724/SP.J.1146.2009.00627
Abstract:
Traditional 2D Otsus method supposes that the sum of probabilities of main- diagonal distinct in 2D histogram is approximately one. This papers experiments and theory prove that the sum of probabilities of counter-diagonal distinct in 2D histogram is...
Traditional 2D Otsus method supposes that the sum of probabilities of main- diagonal distinct in 2D histogram is approximately one. This papers experiments and theory prove that the sum of probabilities of counter-diagonal distinct in 2D histogram is...
2010, 32(5): 1105-1110.
doi: 10.3724/SP.J.1146.2009.00599
Abstract:
Similarity computation is one of the significant issue in Template-Matching-Method (TMM) based high range resolution automatic target recognition. This paper demonstrates error computation and similarity measurement metrics in similarity computation,...
Similarity computation is one of the significant issue in Template-Matching-Method (TMM) based high range resolution automatic target recognition. This paper demonstrates error computation and similarity measurement metrics in similarity computation,...
2010, 32(5): 1111-1115.
doi: 10.3724/SP.J.1146.2008.01755
Abstract:
For the widely demanding of adaptive multiple moving targets tracking, a type of feature based multi-target tracking algorithm is presented. Background is adaptively modeled by Marr wavelet kernel function and a background subtraction technique based...
For the widely demanding of adaptive multiple moving targets tracking, a type of feature based multi-target tracking algorithm is presented. Background is adaptively modeled by Marr wavelet kernel function and a background subtraction technique based...
2010, 32(5): 1116-1120.
doi: 10.3724/SP.J.1146.2009.00298
Abstract:
A new algorithm based on Interacting Multiple Model (IMM) iterated extended Kalman particle filter is proposed for maneuvering target tracking, which uses an improved Particle Filter (PF) in multiple model. First, the Iterated Extended Kalman Filter ...
A new algorithm based on Interacting Multiple Model (IMM) iterated extended Kalman particle filter is proposed for maneuvering target tracking, which uses an improved Particle Filter (PF) in multiple model. First, the Iterated Extended Kalman Filter ...
2010, 32(5): 1121-1125.
doi: 10.3724/SP.J.1146.2009.00622
Abstract:
Face recognition is an active research area in the artificial intelligence. A face recognition algorithm using improved Non-negative Matrix Factorization(NMF) with Projected Gradient(PG) for single-trial feature extraction is proposed based on this p...
Face recognition is an active research area in the artificial intelligence. A face recognition algorithm using improved Non-negative Matrix Factorization(NMF) with Projected Gradient(PG) for single-trial feature extraction is proposed based on this p...
2010, 32(5): 1126-1130.
doi: 10.3724/SP.J.1146.2009.00549
Abstract:
In this paper a complete on-line handwritten arithmetic expression recognition system is introduced. During the process of stroke grouping and symbol recognition, pre-processing strategy and searching procedure are combined to optimize the confidence...
In this paper a complete on-line handwritten arithmetic expression recognition system is introduced. During the process of stroke grouping and symbol recognition, pre-processing strategy and searching procedure are combined to optimize the confidence...
2010, 32(5): 1131-1135.
doi: 10.3724/SP.J.1146.2009.00748
Abstract:
It is important to identify the source or owner after the vector map is leaked in some key application areas. In this paper proposed scheme, the characteristics of the map owners fingerprint can be extracted and converted into the binary character st...
It is important to identify the source or owner after the vector map is leaked in some key application areas. In this paper proposed scheme, the characteristics of the map owners fingerprint can be extracted and converted into the binary character st...
2010, 32(5): 1136-1140.
doi: 10.3724/SP.J.1146.2009.00530
Abstract:
Secret message can be embedded into letters in tags of a webpage in ways that are imperceptible to human eye viewed with a browser. These messages, however, alter the inherent characteristic of the offset of a tag. This paper presents a new higher-or...
Secret message can be embedded into letters in tags of a webpage in ways that are imperceptible to human eye viewed with a browser. These messages, however, alter the inherent characteristic of the offset of a tag. This paper presents a new higher-or...
2010, 32(5): 1141-1145.
doi: 10.3724/SP.J.1146.2009.00641
Abstract:
It is a valuable task of mining hot topics on Internet utilizing users feedback under Web 2.0 environment. Motivated by heat diffusion phenomena, the information activities on the Internet are treated as heat flow, and heat diffusion model is used to...
It is a valuable task of mining hot topics on Internet utilizing users feedback under Web 2.0 environment. Motivated by heat diffusion phenomena, the information activities on the Internet are treated as heat flow, and heat diffusion model is used to...
2010, 32(5): 1146-1151.
doi: 10.3724/SP.J.1146.2009.00523
Abstract:
In non-cooperative communication scenarios, coherent demodulation of Continuous Phase Modulation (CPM) signals requires precise estimation of CPM modulation parameters. A new data-aided modulation index and shaping pulse joint estimation algorithm is...
In non-cooperative communication scenarios, coherent demodulation of Continuous Phase Modulation (CPM) signals requires precise estimation of CPM modulation parameters. A new data-aided modulation index and shaping pulse joint estimation algorithm is...
2010, 32(5): 1152-1156.
doi: 10.3724/SP.J.1146.2009.00838
Abstract:
Most of the proposed constructions for Low-Density Parity-Check (LDPC) codes with girth at least eight are focused on (semi-) stochastic methods with the aid of computer search. Motivated by the resulting parity-check matrices obtained from the Greed...
Most of the proposed constructions for Low-Density Parity-Check (LDPC) codes with girth at least eight are focused on (semi-) stochastic methods with the aid of computer search. Motivated by the resulting parity-check matrices obtained from the Greed...
2010, 32(5): 1157-1162.
doi: 10.3724/SP.J.1146.2009.00586
Abstract:
For Space-Time Block Code (STBC) systems with unknown co-channel interference in multi-cell environment, focusing on the problem that the Capon-style receivers will result the self-interference in the STBC codeword from the finite samples, a robust l...
For Space-Time Block Code (STBC) systems with unknown co-channel interference in multi-cell environment, focusing on the problem that the Capon-style receivers will result the self-interference in the STBC codeword from the finite samples, a robust l...
2010, 32(5): 1163-1167.
doi: 10.3724/SP.J.1146.2009.00614
Abstract:
For Multiple-Input Multiple-Output with Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems, Maximum A posteriori Probability (MAP) channel estimation algorithm uses expectation maximum (EM) algorithm to reduce complexity, but it will lead...
For Multiple-Input Multiple-Output with Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems, Maximum A posteriori Probability (MAP) channel estimation algorithm uses expectation maximum (EM) algorithm to reduce complexity, but it will lead...
A Minimum Jamming Precoding Algorithm and Its Performance Analysis for the Downlink Multiuser System
2010, 32(5): 1168-1172.
doi: 10.3724/SP.J.1146.2009.00623
Abstract:
In this paper, a linearly precoding algorithm is presented based on the minimum jamming criterion for the downlink multi-element multi-user system. And by using nonlinear programming method, the closed-form expression of precoding weights is also der...
In this paper, a linearly precoding algorithm is presented based on the minimum jamming criterion for the downlink multi-element multi-user system. And by using nonlinear programming method, the closed-form expression of precoding weights is also der...
2010, 32(5): 1173-1177.
doi: 10.3724/SP.J.1146.2009.00783
Abstract:
The small spacing between the double circular polarized antennas installed in the small mobile terminal can lead to the strong spatial correlation, which will directly diminish the channel capacity. From the theoretical point, this paper studies the ...
The small spacing between the double circular polarized antennas installed in the small mobile terminal can lead to the strong spatial correlation, which will directly diminish the channel capacity. From the theoretical point, this paper studies the ...
2010, 32(5): 1178-1182.
doi: 10.3724/SP.J.1146.2009.00587
Abstract:
Intrinsic Time-scale Decomposition(ITD) algorithm is a kind of local wave analysis algorithm. In this paper, Direct Sequence Spread Spectrum (DSSS) signal is decomposed by ITD and a fast algorithm for detecting the chip rate and carrier frequency of ...
Intrinsic Time-scale Decomposition(ITD) algorithm is a kind of local wave analysis algorithm. In this paper, Direct Sequence Spread Spectrum (DSSS) signal is decomposed by ITD and a fast algorithm for detecting the chip rate and carrier frequency of ...
2010, 32(5): 1183-1187.
doi: 10.3724/SP.J.1146.2009.00556
Abstract:
A virtual MIMO transmission scheme based on Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) with Block-Space-Time Block Coding (B-STBC)is proposed and a lower complexity detection algorithm for the virtual MI...
A virtual MIMO transmission scheme based on Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) with Block-Space-Time Block Coding (B-STBC)is proposed and a lower complexity detection algorithm for the virtual MI...
2010, 32(5): 1188-1192.
doi: 10.3724/SP.J.1146.2009.00463
Abstract:
This paper proposes a novel transform coding method based on the Karhunen-Loeve (KL) transform in multiple linear spaces. This method uses multiple linear subspaces to approximate image signals, and use a KL transform for each linear subspace, so tha...
This paper proposes a novel transform coding method based on the Karhunen-Loeve (KL) transform in multiple linear spaces. This method uses multiple linear subspaces to approximate image signals, and use a KL transform for each linear subspace, so tha...
2010, 32(5): 1193-1199.
doi: 10.3724/SP.J.1146.2009.00775
Abstract:
Due to the deficiencies of current schemes in the aspecct of energy consumption efficiently, this paper proposes a novel Multi-Radio Channel Searching Scheme (MRCSS) based on Partially Observable Markov Decision Process (POMDP) in rayleigh fading env...
Due to the deficiencies of current schemes in the aspecct of energy consumption efficiently, this paper proposes a novel Multi-Radio Channel Searching Scheme (MRCSS) based on Partially Observable Markov Decision Process (POMDP) in rayleigh fading env...
2010, 32(5): 1200-1204.
doi: 10.3724/SP.J.1146.2009.00744
Abstract:
Cooperative communication enables nodes to share their antennas to form a virtual multiple-input multiple-output system and achieve spatial diversity gain. Exploiting the diversity gain of V-MIMO channels, a multi-packet reception method is proposed ...
Cooperative communication enables nodes to share their antennas to form a virtual multiple-input multiple-output system and achieve spatial diversity gain. Exploiting the diversity gain of V-MIMO channels, a multi-packet reception method is proposed ...
2010, 32(5): 1205-1211.
doi: 10.3724/SP.J.1146.2009.00201
Abstract:
The efficiency of energy consumption in wireless sensor networks is closely related to the traffic of each node. In this paper, the issue of load balancing in wireless sensor networks is researched on the microscopic scale. Based on an equiprobable r...
The efficiency of energy consumption in wireless sensor networks is closely related to the traffic of each node. In this paper, the issue of load balancing in wireless sensor networks is researched on the microscopic scale. Based on an equiprobable r...
2010, 32(5): 1212-1218.
doi: 10.3724/SP.J.1146.2009.00295
Abstract:
For that the communications by unreliable links wastes too much energy in wireless sensor networks, based on link quality, routing cost functions are constructed and proper selective probability is allocated to paths. Then the algorithm CBLQ (Cost Ba...
For that the communications by unreliable links wastes too much energy in wireless sensor networks, based on link quality, routing cost functions are constructed and proper selective probability is allocated to paths. Then the algorithm CBLQ (Cost Ba...
2010, 32(5): 1219-1223.
doi: 10.3724/SP.J.1146.2009.00754
Abstract:
The proposed proxy re-signature schemes had no message blinded properties as yet, so there is a problem that they can not protect the original signers privacy. The general proxy re-signature scheme is extended using the idea of blind signature. The d...
The proposed proxy re-signature schemes had no message blinded properties as yet, so there is a problem that they can not protect the original signers privacy. The general proxy re-signature scheme is extended using the idea of blind signature. The d...
2010, 32(5): 1224-1228.
doi: 10.3724/SP.J.1146.2009.00739
Abstract:
MTL (Multiconductor Transmission Line) inductance matrix is commonly computed through complex and tiresome indirect transform method, so a novel method to directly compute the MTL inductance matrix is proposed. Double filaments circuit is utilized to...
MTL (Multiconductor Transmission Line) inductance matrix is commonly computed through complex and tiresome indirect transform method, so a novel method to directly compute the MTL inductance matrix is proposed. Double filaments circuit is utilized to...
2010, 32(5): 1229-1233.
doi: 10.3724/SP.J.1146.2009.00631
Abstract:
A innovative digital signal processing technique for fast measurements of ElectroMagnetic Interference(EMI) from devices under test in the time-domain at open area test sites is presented. Suppressing ambient noise by using the wavelet analysis, the ...
A innovative digital signal processing technique for fast measurements of ElectroMagnetic Interference(EMI) from devices under test in the time-domain at open area test sites is presented. Suppressing ambient noise by using the wavelet analysis, the ...
2010, 32(5): 1234-1238.
doi: 10.3724/SP.J.1146.2009.01223
Abstract:
Compressive sensing technique has been shown to be able to reduce effectively the data rate of high- resolution radar imaging system. A phase-preserving range compression algorithm based on Compressive Sensing (CS) technique is proposed, after analyz...
Compressive sensing technique has been shown to be able to reduce effectively the data rate of high- resolution radar imaging system. A phase-preserving range compression algorithm based on Compressive Sensing (CS) technique is proposed, after analyz...
2010, 32(5): 1239-1243.
doi: 10.3724/SP.J.1146.2009.00565
Abstract:
The sub-aperture algorithm has great important role in SAR real-time processing. The algorithm combined the sub-aperture and Nonlinear Chirp Scaling (NCS) algorithm has good performance in real-time processing of UWB SAR. However the ghost or false t...
The sub-aperture algorithm has great important role in SAR real-time processing. The algorithm combined the sub-aperture and Nonlinear Chirp Scaling (NCS) algorithm has good performance in real-time processing of UWB SAR. However the ghost or false t...
2010, 32(5): 1244-1247.
doi: 10.3724/SP.J.1146.2009.00640
Abstract:
Interferometric parameters calibration of InSAR system can acquire both interferometric phase bias and accurate baseline parameters. Then planimetric and vertical accuracies can be improved much. An approach of interferometric calibration over very l...
Interferometric parameters calibration of InSAR system can acquire both interferometric phase bias and accurate baseline parameters. Then planimetric and vertical accuracies can be improved much. An approach of interferometric calibration over very l...
2010, 32(5): 1248-1252.
doi: 10.3724/SP.J.1146.2009.00544
Abstract:
In this paper a new kind of waveform is proposed to improve covertness of active sonar. A specified code is used to modulate the chaotic signal as waveform of active sonar. The issues of the distortions introduced by filtered by physical underwater c...
In this paper a new kind of waveform is proposed to improve covertness of active sonar. A specified code is used to modulate the chaotic signal as waveform of active sonar. The issues of the distortions introduced by filtered by physical underwater c...
2010, 32(5): 1253-1256.
doi: 10.3724/SP.J.1146.2009.00460
Abstract:
A novel method of multi-sources distinguishing is proposed single acoustic vector sensor by detecting the line spectra. The distinguishing capability is found to be only relative to the output SNR of the line spectra. with the direction finding abili...
A novel method of multi-sources distinguishing is proposed single acoustic vector sensor by detecting the line spectra. The distinguishing capability is found to be only relative to the output SNR of the line spectra. with the direction finding abili...
2010, 32(5): 1257-1261.
doi: 10.3724/SP.J.1146.2009.00726
Abstract:
The average Hamming correlation is an important performance indicator of the frequency hopping sequences. Based on power residue module p, a class of frequency-hopping sequence family with length of sequences being p2 and family size (p-1)2 is constr...
The average Hamming correlation is an important performance indicator of the frequency hopping sequences. Based on power residue module p, a class of frequency-hopping sequence family with length of sequences being p2 and family size (p-1)2 is constr...
2010, 32(5): 1262-1266.
doi: 10.3724/SP.J.1146.2009.00647
Abstract:
In the 802.16e system, when multiple Mobile Stations (MS) with real-time services enter sleep mode, the efficiency of power saving is impacted by the competition of the data scheduling in the overlapping listening windows. This paper analyzes the imp...
In the 802.16e system, when multiple Mobile Stations (MS) with real-time services enter sleep mode, the efficiency of power saving is impacted by the competition of the data scheduling in the overlapping listening windows. This paper analyzes the imp...
2010, 32(5): 1267-1270.
doi: 10.3724/SP.J.1146.2009.00568
Abstract:
The influence of Electromagnetic Band-Gap (EBG) structure on signal transmission is investigated in this paper. The signal integrity in time domain and frequency domain is analyzed by HFSS and S parameter model. The simulation results show that the s...
The influence of Electromagnetic Band-Gap (EBG) structure on signal transmission is investigated in this paper. The signal integrity in time domain and frequency domain is analyzed by HFSS and S parameter model. The simulation results show that the s...
