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2011 Vol. 33, No. 9
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2011, 33(9): 2033-2038.
doi: 10.3724/SP.J.1146.2011.00017
Abstract:
Considering the uncertainty of message bit width, the Cramer-Rao Bounds (CRBs) for Frequency Of Arrival (FOA) and Time Of Arrival (TOA) estimation from single Galileo Search And Rescue (SAR) signal are researched. Calculation expressions for the elem...
Considering the uncertainty of message bit width, the Cramer-Rao Bounds (CRBs) for Frequency Of Arrival (FOA) and Time Of Arrival (TOA) estimation from single Galileo Search And Rescue (SAR) signal are researched. Calculation expressions for the elem...
2011, 33(9): 2039-2044.
doi: 10.3724/SP.J.1146.2010.01216
Abstract:
A new method is proposed to improve the performance of estimating the number of signal components in low Signal-to-Noise Ratio (SNR) environment, based on singular values of noise subspace and the principle of Constant False Alarm Rate (CFAR). Throug...
A new method is proposed to improve the performance of estimating the number of signal components in low Signal-to-Noise Ratio (SNR) environment, based on singular values of noise subspace and the principle of Constant False Alarm Rate (CFAR). Throug...
2011, 33(9): 2045-2049.
doi: 10.3724/SP.J.1146.2011.00127
Abstract:
Standard Capon beamformer has serious distortion in the small snapshot or steering vectors mismatched or high SNR. In order to improve the robustness of beam, a robust Capon Beamforming with Orthomodular Constraints algorithm (OCCB) is proposed, thro...
Standard Capon beamformer has serious distortion in the small snapshot or steering vectors mismatched or high SNR. In order to improve the robustness of beam, a robust Capon Beamforming with Orthomodular Constraints algorithm (OCCB) is proposed, thro...
2011, 33(9): 2050-2055.
doi: 10.3724/SP.J.1146.2011.00110
Abstract:
Aiming at the defects of large computational loads and slow convergence speed of Time diversity fractionally spaced Decision feedback blind equalization algorithm (TD), on the basis of defining spline function Renyi entropy, Spline function Renyi ent...
Aiming at the defects of large computational loads and slow convergence speed of Time diversity fractionally spaced Decision feedback blind equalization algorithm (TD), on the basis of defining spline function Renyi entropy, Spline function Renyi ent...
2011, 33(9): 2056-2061.
doi: 10.3724/SP.J.1146.2010.01273
Abstract:
A multi-source time-delay estimation algorithm based on iterative cross-spectrum weighted histogram is studied for real-time passive direction finding of multiple sound sources with a widely spaced microphone array. By using the short-time spectral s...
A multi-source time-delay estimation algorithm based on iterative cross-spectrum weighted histogram is studied for real-time passive direction finding of multiple sound sources with a widely spaced microphone array. By using the short-time spectral s...
2011, 33(9): 2062-2067.
doi: 10.3724/SP.J.1146.2011.00014
Abstract:
For low bit rate speech coding applications, it is very important to quantize the Line Spectrum Pair (LSP) parameters accurately using as few bits as possible without sacrificing the speech quality. In this paper, the sparsity of LSP parameters on th...
For low bit rate speech coding applications, it is very important to quantize the Line Spectrum Pair (LSP) parameters accurately using as few bits as possible without sacrificing the speech quality. In this paper, the sparsity of LSP parameters on th...
2011, 33(9): 2068-2075.
doi: 10.3724/SP.J.1146.2011.00033
Abstract:
Frequency-stepped chirp signal is an effective radar signal which can utilize the digital signal processing to obtain high range resolution with relatively narrow instantaneous bandwidth. Because the anti-jamming ability of frequency-stepped chirp si...
Frequency-stepped chirp signal is an effective radar signal which can utilize the digital signal processing to obtain high range resolution with relatively narrow instantaneous bandwidth. Because the anti-jamming ability of frequency-stepped chirp si...
2011, 33(9): 2076-2082.
doi: 10.3724/SP.J.1146.2010.01449
Abstract:
For the problem of associating the 1D scattering centers at unknown viewing angles existed in the technique of non-cooperative radar target 3D reconstruction, a method of scattering centers association based on geometric constraint is proposed. In th...
For the problem of associating the 1D scattering centers at unknown viewing angles existed in the technique of non-cooperative radar target 3D reconstruction, a method of scattering centers association based on geometric constraint is proposed. In th...
Feature Extraction of Precession and Structure of Cone-shaped Object Based on Time-HRRP Distribution
2011, 33(9): 2083-2088.
doi: 10.3724/SP.J.1146.2011.00097
Abstract:
Utilizing multi-feature for ballistic target recognition is a trend in the ballistic missile defense field. In the published literatures, the structure feature extraction of ballistic targets need know some precession parameters, while the precession...
Utilizing multi-feature for ballistic target recognition is a trend in the ballistic missile defense field. In the published literatures, the structure feature extraction of ballistic targets need know some precession parameters, while the precession...
2011, 33(9): 2089-2096.
doi: 10.3724/SP.J.1146.2011.00047
Abstract:
Because of the long integration time of Medium Earth Orbit SAR (MEO SAR), the hyperbolic range equation based on linear trajectory module is not suit for MEO SAR. Considering this issue, a high-order modified hyperbolic range equation is proposed. In...
Because of the long integration time of Medium Earth Orbit SAR (MEO SAR), the hyperbolic range equation based on linear trajectory module is not suit for MEO SAR. Considering this issue, a high-order modified hyperbolic range equation is proposed. In...
2011, 33(9): 2097-2102.
doi: 10.3724/SP.J.1146.2011.00021
Abstract:
To enhance the performance of Compressive Sensing Radar (CSR) target information extraction ability, a CSR optimal waveform design method based on minimizing the statistical coherence of the sensing matrix is proposed. First, a universal CSR model is...
To enhance the performance of Compressive Sensing Radar (CSR) target information extraction ability, a CSR optimal waveform design method based on minimizing the statistical coherence of the sensing matrix is proposed. First, a universal CSR model is...
2011, 33(9): 2103-2107.
doi: 10.3724/SP.J.1146.2011.00073
Abstract:
Multiple target Doppler ambiguity resolution is one of key processing techniques for low Pulse Repetition Frequency (PRF) radar. A new Doppler ambiguity resolution approach based on Compressive Sensing (CS) theory is presented. Making use of the char...
Multiple target Doppler ambiguity resolution is one of key processing techniques for low Pulse Repetition Frequency (PRF) radar. A new Doppler ambiguity resolution approach based on Compressive Sensing (CS) theory is presented. Making use of the char...
2011, 33(9): 2108-2113.
doi: 10.3724/SP.J.1146.2011.00150
Abstract:
Based on the equivalent-squint range model, an modified-k algorithm for wide-field and high-resolution spaceborne spotlight SAR is proposed. In order to process the wide field and high resolution spaceborne SAR data precisely, by taking use of the re...
Based on the equivalent-squint range model, an modified-k algorithm for wide-field and high-resolution spaceborne spotlight SAR is proposed. In order to process the wide field and high resolution spaceborne SAR data precisely, by taking use of the re...
2011, 33(9): 2114-2119.
doi: 10.3724/SP.J.1146.2011.00190
Abstract:
Bandwidth synthetic technique provides a fine range resolution for the advanced airborne SAR system. In strip-map mode, in order to get an as good azimuth resolution as the range, the precise motion compensation is important. This paper studies sever...
Bandwidth synthetic technique provides a fine range resolution for the advanced airborne SAR system. In strip-map mode, in order to get an as good azimuth resolution as the range, the precise motion compensation is important. This paper studies sever...
2011, 33(9): 2120-2124.
doi: 10.3724/SP.J.1146.2010.01133
Abstract:
In Forward-Looking Airborne Radar (FLAR), the covariance matrix of the Cell Under Test (CUT) is not accurately estimated which is caused by the range-dependence problem, and it declines the clutter rejection performance of the Space-Time Adaptive Pro...
In Forward-Looking Airborne Radar (FLAR), the covariance matrix of the Cell Under Test (CUT) is not accurately estimated which is caused by the range-dependence problem, and it declines the clutter rejection performance of the Space-Time Adaptive Pro...
2011, 33(9): 2125-2131.
doi: 10.3724/SP.J.1146.2010.01135
Abstract:
This paper focuses on the problem of clutter rank estimation of coherent airborne MIMO radar with arbitrary transmitted waveform synthetic structures. A new construct method of clutter rank estimation for Multiple Input Multiple Output (MIMO) radar i...
This paper focuses on the problem of clutter rank estimation of coherent airborne MIMO radar with arbitrary transmitted waveform synthetic structures. A new construct method of clutter rank estimation for Multiple Input Multiple Output (MIMO) radar i...
2011, 33(9): 2132-2137.
doi: 10.3724/SP.J.1146.2011.00018
Abstract:
Ship detection in harbor region is an important aspect in SAR ocean application research. Fast and accurate ship detection can improve the ability of automatic SAR images interpretation greatly. By analyzing of the characteristics of ship berthing in...
Ship detection in harbor region is an important aspect in SAR ocean application research. Fast and accurate ship detection can improve the ability of automatic SAR images interpretation greatly. By analyzing of the characteristics of ship berthing in...
2011, 33(9): 2138-2143.
doi: 10.3724/SP.J.1146.2010.01392
Abstract:
Zero value measurement is an important measurement of navigation receivers. The non-ideal characteristic of actual receiver channel, including the amplitude-frequency response and the phase-frequency response, has different influence on zero value es...
Zero value measurement is an important measurement of navigation receivers. The non-ideal characteristic of actual receiver channel, including the amplitude-frequency response and the phase-frequency response, has different influence on zero value es...
2011, 33(9): 2144-2151.
doi: 10.3724/SP.J.1146.2011.00074
Abstract:
The key point in applying high-dimensional local features to remote sensing image retrieval is to improve the efficiency of feature matching. A new Compressed Priority Filter (CPF) algorithm is investigated that quantizes the feature vectors to compr...
The key point in applying high-dimensional local features to remote sensing image retrieval is to improve the efficiency of feature matching. A new Compressed Priority Filter (CPF) algorithm is investigated that quantizes the feature vectors to compr...
2011, 33(9): 2152-2157.
doi: 10.3724/SP.J.1146.2011.00007
Abstract:
In order to solve the problem that it is difficult to balance the real-time performance and robustness in image matching using local feature, an image matching algorithm based on Signed Contrast Context Histogram (SCCH) feature descriptor is presente...
In order to solve the problem that it is difficult to balance the real-time performance and robustness in image matching using local feature, an image matching algorithm based on Signed Contrast Context Histogram (SCCH) feature descriptor is presente...
2011, 33(9): 2158-2163.
doi: 10.3724/SP.J.1146.2011.00156
Abstract:
Most traditional information fusion methods depend on system models, where certain simplification will be introduced. However, with increased complexity of applications, these models tend to be inadequate and show bias to the real situation. In some ...
Most traditional information fusion methods depend on system models, where certain simplification will be introduced. However, with increased complexity of applications, these models tend to be inadequate and show bias to the real situation. In some ...
2011, 33(9): 2164-2168.
doi: 10.3724/SP.J.1146.2010.01400
Abstract:
Interfered image quality assessment is a key issue on photoelectric interference. The assessment result should match with visual perceptual factors. First, the characteristic of interfered image and the shortage of normal image quality assessment met...
Interfered image quality assessment is a key issue on photoelectric interference. The assessment result should match with visual perceptual factors. First, the characteristic of interfered image and the shortage of normal image quality assessment met...
2011, 33(9): 2169-2174.
doi: 10.3724/SP.J.1146.2010.01410
Abstract:
For good security and large payload in steganography, it is desired to embed as many messages as possible per change of the cover-object, i.e., to have high embedding efficiency. Matrix embedding is the most popular method for increasing the embeddin...
For good security and large payload in steganography, it is desired to embed as many messages as possible per change of the cover-object, i.e., to have high embedding efficiency. Matrix embedding is the most popular method for increasing the embeddin...
2011, 33(9): 2175-2180.
doi: 10.3724/SP.J.1146.2010.01358
Abstract:
It is difficult for the traditional projection algorithms to extend to incremental learning since they use the whole training sets for solving out the projection matrix directly. To tackle this problem, a novel method, named Block optimization and Co...
It is difficult for the traditional projection algorithms to extend to incremental learning since they use the whole training sets for solving out the projection matrix directly. To tackle this problem, a novel method, named Block optimization and Co...
2011, 33(9): 2181-2186.
doi: 10.3724/SP.J.1146.2011.00107
Abstract:
The number of Support Vectors (SVs) of SVM is usually large and this results in a substantially slower classification speed than many other approaches. The less SVs means the more sparseness and higher classification speed. How to reduce the number o...
The number of Support Vectors (SVs) of SVM is usually large and this results in a substantially slower classification speed than many other approaches. The less SVs means the more sparseness and higher classification speed. How to reduce the number o...
2011, 33(9): 2187-2191.
doi: 10.3724/SP.J.1146.2010.01434
Abstract:
In order to circumvent the deficiencies of Support Vector Machine (SVM) and its improved algorithms, this paper presents Maximum-margin Learning Machine based on Entropy concept and Kernel density estimation (MLMEK). In MLMEK, data distributions in s...
In order to circumvent the deficiencies of Support Vector Machine (SVM) and its improved algorithms, this paper presents Maximum-margin Learning Machine based on Entropy concept and Kernel density estimation (MLMEK). In MLMEK, data distributions in s...
2011, 33(9): 2192-2198.
doi: 10.3724/SP.J.1146.2011.00396
Abstract:
Based on the existing Coverage-Based Fault-Localization (CBFL) methods can not effectively solve the problem of failure propagation impact for the location precision, this paper proposes a propagation-aware program fault location method. This method ...
Based on the existing Coverage-Based Fault-Localization (CBFL) methods can not effectively solve the problem of failure propagation impact for the location precision, this paper proposes a propagation-aware program fault location method. This method ...
2011, 33(9): 2199-2204.
doi: 10.3724/SP.J.1146.2011.00001
Abstract:
In cloud storage, in order to allow users to verify that the storage service providers store the user's data intactly. A homomorphic hashing based Provable Data Possession (PDP) method is proposed. Because of the homomorphism of hash algorithm, the h...
In cloud storage, in order to allow users to verify that the storage service providers store the user's data intactly. A homomorphic hashing based Provable Data Possession (PDP) method is proposed. Because of the homomorphism of hash algorithm, the h...
2011, 33(9): 2205-2211.
doi: 10.3724/SP.J.1146.2010.01266
Abstract:
A method for energy optimization based on the partitioning, assignment, and task mapping of voltage-frequency islands is proposed, considering the issue of energy optimization of Network-on-Chip (NoC) that supports voltage-frequency islands. The ener...
A method for energy optimization based on the partitioning, assignment, and task mapping of voltage-frequency islands is proposed, considering the issue of energy optimization of Network-on-Chip (NoC) that supports voltage-frequency islands. The ener...
2011, 33(9): 2212-2218.
doi: 10.3724/SP.J.1146.2011.00058
Abstract:
Within the confines of access width and storage capacity in Ternary Content Addressable Memory (TCAM) chip, pattern matching algorithm using TCAM has low throughput and limited memory. This paper proposes BF-TCAM algorithm based on access compression...
Within the confines of access width and storage capacity in Ternary Content Addressable Memory (TCAM) chip, pattern matching algorithm using TCAM has low throughput and limited memory. This paper proposes BF-TCAM algorithm based on access compression...
2011, 33(9): 2219-2224.
doi: 10.3724/SP.J.1146.2010.00975
Abstract:
P2P-based IPTV (P2P-TV) is one of the Internet applications grown dramatically currently. It is the key to identify P2P-TV video streaming in real-time for managing the P2P-TV traffic and understanding the networking behaviors. Analyzing the architec...
P2P-based IPTV (P2P-TV) is one of the Internet applications grown dramatically currently. It is the key to identify P2P-TV video streaming in real-time for managing the P2P-TV traffic and understanding the networking behaviors. Analyzing the architec...
2011, 33(9): 2225-2230.
doi: 10.3724/SP.J.1146.2011.00026
Abstract:
To solve the puzzle faced by traditional Internet infrastructure, a new Reconfigurable Flexible Network (ReFlexNet) Infrastructure is proposed. The inter-domain Reconfigurable Embedded Carrying Network (RECN) construction issues in ReFlexNet are disc...
To solve the puzzle faced by traditional Internet infrastructure, a new Reconfigurable Flexible Network (ReFlexNet) Infrastructure is proposed. The inter-domain Reconfigurable Embedded Carrying Network (RECN) construction issues in ReFlexNet are disc...
2011, 33(9): 2231-2236.
doi: 10.3724/SP.J.1146.2010.00919
Abstract:
Crosstalk is one of the important parameters for InfraRed Focal Plane Array (IRFPA) performance evaluation. As the size of IRFPA element reduces, the size of testing spot of traditional small spot test method is close to or even greater than that of ...
Crosstalk is one of the important parameters for InfraRed Focal Plane Array (IRFPA) performance evaluation. As the size of IRFPA element reduces, the size of testing spot of traditional small spot test method is close to or even greater than that of ...
2011, 33(9): 2237-2242.
doi: 10.3724/SP.J.1146.2010.01262
Abstract:
The method of feedforward current control slope compensation and its circuit structure are proposed. With this method, the zero-crossing distortion of boundary boost Power Factor Correction (PFC) converter is reduced, for improving limits for harmoni...
The method of feedforward current control slope compensation and its circuit structure are proposed. With this method, the zero-crossing distortion of boundary boost Power Factor Correction (PFC) converter is reduced, for improving limits for harmoni...
2011, 33(9): 2243-2247.
doi: 10.3724/SP.J.1146.2010.01443
Abstract:
In the high power klystrons, the AC space-charge effects from the bunching of electrons in gap can not be ignored due to the higher beam current and longer gap distance. The traditional coupling coefficient calculation model according to the simplifi...
In the high power klystrons, the AC space-charge effects from the bunching of electrons in gap can not be ignored due to the higher beam current and longer gap distance. The traditional coupling coefficient calculation model according to the simplifi...
2011, 33(9): 2248-2252.
doi: 10.3724/SP.J.1146.2010.01343
Abstract:
According to the correlation analysis of Compressed Sensing (CS) measurements for hyperspectral images, a new reconstruction algorithm based on interband prediction and joint optimization is proposed. In the method, linear prediction is first applied...
According to the correlation analysis of Compressed Sensing (CS) measurements for hyperspectral images, a new reconstruction algorithm based on interband prediction and joint optimization is proposed. In the method, linear prediction is first applied...
2011, 33(9): 2253-2257.
doi: 10.3724/SP.J.1146.2010.01435
Abstract:
To improve the temporal-spatial resolution of video, a space-time super-resolution reconstruction algorithm using L1 norm minimization is proposed, and space-time regularization based on the total variation is utilized. The proposed algorithm can inc...
To improve the temporal-spatial resolution of video, a space-time super-resolution reconstruction algorithm using L1 norm minimization is proposed, and space-time regularization based on the total variation is utilized. The proposed algorithm can inc...
2011, 33(9): 2258-2262.
doi: 10.3724/SP.J.1146.2010.01422
Abstract:
Magnetic Induction Tomography (MIT) is a new technique for conductivity of biological tissue to reconstruct image. Weak eddy current signal within biological tissue restricts the precision of detection device and resolution of reconstruction image. A...
Magnetic Induction Tomography (MIT) is a new technique for conductivity of biological tissue to reconstruct image. Weak eddy current signal within biological tissue restricts the precision of detection device and resolution of reconstruction image. A...
2011, 33(9): 2263-2267.
doi: 10.3724/SP.J.1146.2010.01431
Abstract:
Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China
Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China
2011, 33(9): 2268-2272.
doi: 10.3724/SP.J.1146.2011.00103
Abstract:
Specific Emitter Verification (SEV) is one of the key technology to identify a specific emitter. Specific Emitter Verification algorithm based on Support Vector Data Description (SVDD) is studied in this paper. To improve the low fraction of target c...
Specific Emitter Verification (SEV) is one of the key technology to identify a specific emitter. Specific Emitter Verification algorithm based on Support Vector Data Description (SVDD) is studied in this paper. To improve the low fraction of target c...
2011, 33(9): 2273-2277.
doi: 10.3724/SP.J.1146.2011.00041
Abstract:
An implementing scheme of sum-product algorithm is proposed based on 2-dimation broken line approach, which avoids the look-up table with size related to the exponential of the number of quantization bits and reduces the memory consumption of the dec...
An implementing scheme of sum-product algorithm is proposed based on 2-dimation broken line approach, which avoids the look-up table with size related to the exponential of the number of quantization bits and reduces the memory consumption of the dec...
2011, 33(9): 2278-2282.
doi: 10.3724/SP.J.1146.2010.00814
Abstract:
This paper addresses the issue of temporal dependence network link loss inference, presents a k-th order Markov chain based unicast network loss tomography method. The method introduces firstly k-th order Markov Chain (k-MC) to describe the link pack...
This paper addresses the issue of temporal dependence network link loss inference, presents a k-th order Markov chain based unicast network loss tomography method. The method introduces firstly k-th order Markov Chain (k-MC) to describe the link pack...
2011, 33(9): 2283-2286.
doi: 10.3724/SP.J.1146.2011.00022
Abstract:
According to the physical mechanism of the Electromagnetic Band-Gap (EBG) structure and the equivalent circuit model of the planar EBG structure, a novel compact EBG structure is proposed for Simultaneous Switching Noise (SSN) suppression in high spe...
According to the physical mechanism of the Electromagnetic Band-Gap (EBG) structure and the equivalent circuit model of the planar EBG structure, a novel compact EBG structure is proposed for Simultaneous Switching Noise (SSN) suppression in high spe...
