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2014 Vol. 36, No. 2
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2014, 36(2): 255-259.
doi: 10.3724/SP.J.1146.2013.00726
Abstract:
Under the influence of additive white Gaussian noise, the classical dectionary learning algorithms, such as K-means Singular Value Decomposition (K-SVD), Recursive Least Squares Dictionary Learning Algorithm (RLS-DLA) and K-means Singular Value Decom...
Under the influence of additive white Gaussian noise, the classical dectionary learning algorithms, such as K-means Singular Value Decomposition (K-SVD), Recursive Least Squares Dictionary Learning Algorithm (RLS-DLA) and K-means Singular Value Decom...
2014, 36(2): 260-265.
doi: 10.3724/SP.J.1146.2013.00601
Abstract:
Most DOA estimation algorithms of distributed sources only estimate central angle of the arriving signal and its distribution parameters. These methods can not obtain the real distribution curve, and may require a two-dimensional search which costs a...
Most DOA estimation algorithms of distributed sources only estimate central angle of the arriving signal and its distribution parameters. These methods can not obtain the real distribution curve, and may require a two-dimensional search which costs a...
2014, 36(2): 266-270.
doi: 10.3724/SP.J.1146.2013.00593
Abstract:
The adaptive phase-only beamforming technique is very important for conventional phased array radar to suppress interference. For the digital array radar, the phase-only technique can be used to enhance the radar power by making full use of transmitt...
The adaptive phase-only beamforming technique is very important for conventional phased array radar to suppress interference. For the digital array radar, the phase-only technique can be used to enhance the radar power by making full use of transmitt...
2014, 36(2): 271-276.
doi: 10.3724/SP.J.1146.2013.00558
Abstract:
图像彩色化是根据人工描绘的局部初始颜色用计算机为灰度图像着色。该文提出一种各向异性的非线性扩散图像彩色化方法，该方法能够克服颜色越界问题。首先建立基于偏微分的扩散方程，通过设置自适应的张量函数，使颜色在平滑区域快速均匀扩散，在颜色交界处按各向异性方式扩散，能够有效增强边缘颜色的连贯性。算法采用有限差分法实现扩散方程的数值求解，与当前流行的彩色化技术相比，该方法能得到更加清晰自然的彩色化图像和更高的图像质量。
图像彩色化是根据人工描绘的局部初始颜色用计算机为灰度图像着色。该文提出一种各向异性的非线性扩散图像彩色化方法，该方法能够克服颜色越界问题。首先建立基于偏微分的扩散方程，通过设置自适应的张量函数，使颜色在平滑区域快速均匀扩散，在颜色交界处按各向异性方式扩散，能够有效增强边缘颜色的连贯性。算法采用有限差分法实现扩散方程的数值求解，与当前流行的彩色化技术相比，该方法能得到更加清晰自然的彩色化图像和更高的图像质量。
2014, 36(2): 277-284.
doi: 10.3724/SP.J.1146.2013.00135
Abstract:
The Local Tangent Space Alignment (LTSA) is one of the popular manifold learning algorithms since it is straightforward to implementation and global optimal. However, LTSA may fail when high-dimensional observation data are sparse or non-uniformly di...
The Local Tangent Space Alignment (LTSA) is one of the popular manifold learning algorithms since it is straightforward to implementation and global optimal. However, LTSA may fail when high-dimensional observation data are sparse or non-uniformly di...
2014, 36(2): 285-292.
doi: 10.3724/SP.J.1146.2013.00396
Abstract:
To improve the rate-distortion performance of video Compressed Sensing (CS) reconstruction, the temporal-spatial characteristics of video are used to jointly recover the video signal in this paper. At the collection terminal, each block in a single-f...
To improve the rate-distortion performance of video Compressed Sensing (CS) reconstruction, the temporal-spatial characteristics of video are used to jointly recover the video signal in this paper. At the collection terminal, each block in a single-f...
2014, 36(2): 293-297.
doi: 10.3724/SP.J.1146.2013.00582
Abstract:
The traditional methods based on linear regression model preserve the edge in some degree, but hardly work on the sharp edge. To solve this problem, an edge directed interpolation algorithm based on regularization is proposed in this paper, which is ...
The traditional methods based on linear regression model preserve the edge in some degree, but hardly work on the sharp edge. To solve this problem, an edge directed interpolation algorithm based on regularization is proposed in this paper, which is ...
2014, 36(2): 298-303.
doi: 10.3724/SP.J.1146.2013.00421
Abstract:
Weighting methods, such as Hamming window, can suppress the peak sidelobe level of matching filter output of Linear Frequency Modulated (LFM) signal, but they also cause obviously mainlobe widening which results in range resolution worsening. Conside...
Weighting methods, such as Hamming window, can suppress the peak sidelobe level of matching filter output of Linear Frequency Modulated (LFM) signal, but they also cause obviously mainlobe widening which results in range resolution worsening. Conside...
2014, 36(2): 304-311.
doi: 10.3724/SP.J.1146.2013.00542
Abstract:
The Improved Non-Subsampled Contourlet Transform (INSCT) algorithm combines redundancy ascending transform and multi direction analysis. Neville-operator is used in the part of redundancy ascending and direction information is lost in the process of ...
The Improved Non-Subsampled Contourlet Transform (INSCT) algorithm combines redundancy ascending transform and multi direction analysis. Neville-operator is used in the part of redundancy ascending and direction information is lost in the process of ...
A Method for People Counting in Complex Scenes Based on Normalized Foreground and Corner Information
2014, 36(2): 312-317.
doi: 10.3724/SP.J.1146.2013.00620
Abstract:
For the problem of people counting in intelligent video surveillance, a method of people counting in complex scenes based on the normalized foreground and corner information is proposed. First, based on the binary foreground, the area of normalized f...
For the problem of people counting in intelligent video surveillance, a method of people counting in complex scenes based on the normalized foreground and corner information is proposed. First, based on the binary foreground, the area of normalized f...
2014, 36(2): 318-324.
doi: 10.3724/SP.J.1146.2012.01373
Abstract:
The location estimated accuracy of Autonomous Underwater Vehicle (AUV) and landmarks decrease because of the degeneracy and impoverishment of samples in standard Fast Simultaneous Localization And Mapping (FastSLAM) algorithm. A improved FastSLAM alg...
The location estimated accuracy of Autonomous Underwater Vehicle (AUV) and landmarks decrease because of the degeneracy and impoverishment of samples in standard Fast Simultaneous Localization And Mapping (FastSLAM) algorithm. A improved FastSLAM alg...
2014, 36(2): 325-331.
doi: 10.3724/SP.J.1146.2013.00657
Abstract:
The temproral link prediction method is investigated in this paper. The disadvantages of the static link prediction methods are analyzed, considering that ignoring the evolving information of networks will lead to a negative impact on link predicting...
The temproral link prediction method is investigated in this paper. The disadvantages of the static link prediction methods are analyzed, considering that ignoring the evolving information of networks will lead to a negative impact on link predicting...
2014, 36(2): 332-339.
doi: 10.3724/SP.J.1146.2013.00584
Abstract:
To solve the issues of blind identification of primitive BCH codes encoding parameters, a novel identification algorithm with probability approximation is presented. Frist, by taking advantage of the approximation of random code words root probabilit...
To solve the issues of blind identification of primitive BCH codes encoding parameters, a novel identification algorithm with probability approximation is presented. Frist, by taking advantage of the approximation of random code words root probabilit...
2014, 36(2): 340-345.
doi: 10.3724/SP.J.1146.2013.00595
Abstract:
Based on orthogonal matrixes, a class of polyphase periodic complementary sequence sets with Zero- Correlation Zone (ZCZ) are proposed. The resultant polyphase ZCZ periodic complementary sets are optimal with respect to the theoretical bound. Moreove...
Based on orthogonal matrixes, a class of polyphase periodic complementary sequence sets with Zero- Correlation Zone (ZCZ) are proposed. The resultant polyphase ZCZ periodic complementary sets are optimal with respect to the theoretical bound. Moreove...
2014, 36(2): 346-352.
doi: 10.3724/SP.J.1146.2013.00512
Abstract:
An anti-frequency-offset algorithm is proposed by utilizing amplitude distribution feature for modulation recognition of conventional satellite modulations, such as QPSK, 16QAM and new modulations like 16APSK and 32APSK. The algorithm is based on ada...
An anti-frequency-offset algorithm is proposed by utilizing amplitude distribution feature for modulation recognition of conventional satellite modulations, such as QPSK, 16QAM and new modulations like 16APSK and 32APSK. The algorithm is based on ada...
2014, 36(2): 353-357.
doi: 10.3724/SP.J.1146.2013.00445
Abstract:
The Signal-to-Noise Ratio (SNR) is an important parameter to measure the quality of the channel, this paper studies SNR estimation method based on Sounding Reference Signal (SRS) in the Long Term Evolution (LTE) system. Since the noise estimation err...
The Signal-to-Noise Ratio (SNR) is an important parameter to measure the quality of the channel, this paper studies SNR estimation method based on Sounding Reference Signal (SRS) in the Long Term Evolution (LTE) system. Since the noise estimation err...
2014, 36(2): 358-363.
doi: 10.3724/SP.J.1146.2013.00316
Abstract:
In this paper, the Bit Error Rate (BER) performance of OFDM based on Co-time Co-frequency Full Duplex (CCFD) is analyzed with amplitude estimation error of self-interference and phase error, in remote multi-path Rayleigh fading channel and Additive W...
In this paper, the Bit Error Rate (BER) performance of OFDM based on Co-time Co-frequency Full Duplex (CCFD) is analyzed with amplitude estimation error of self-interference and phase error, in remote multi-path Rayleigh fading channel and Additive W...
2014, 36(2): 364-370.
doi: 10.3724/SP.J.1146.2013.00928
Abstract:
Energy Detector (ED) is the most common way of idle spectrum sensing in cognitive radio. However, its performance may suffer seriously from the Noise Power Uncertainty (NPU). In this paper, a low computational algorithm is proposed to estimate the NP...
Energy Detector (ED) is the most common way of idle spectrum sensing in cognitive radio. However, its performance may suffer seriously from the Noise Power Uncertainty (NPU). In this paper, a low computational algorithm is proposed to estimate the NP...
2014, 36(2): 371-376.
doi: 10.3724/SP.J.1146.2013.00653
Abstract:
It can not make decision by multi-objective optimization over the multipath channel for Single Carrier Frequency Domain Equalization (SC-FDE) cognitive systems. In order to solve the issue, a novel cognitive radio decision engine is proposed based on...
It can not make decision by multi-objective optimization over the multipath channel for Single Carrier Frequency Domain Equalization (SC-FDE) cognitive systems. In order to solve the issue, a novel cognitive radio decision engine is proposed based on...
2014, 36(2): 377-383.
doi: 10.3724/SP.J.1146.2013.00528
Abstract:
To deal with the problem of entire B-frame loss in stereoscopic video coding with Hierarchical B Pictures (HBP) predict structure, this paper analyzes the motion vector correlations in the frames of adjacent views in a double-view sequence, and propo...
To deal with the problem of entire B-frame loss in stereoscopic video coding with Hierarchical B Pictures (HBP) predict structure, this paper analyzes the motion vector correlations in the frames of adjacent views in a double-view sequence, and propo...
2014, 36(2): 384-389.
doi: 10.3724/SP.J.1146.2013.01143
Abstract:
When the probabilistic packet marking technique for traceback and localization of malicious nodes in Wireless Sensor Networks (WSNs), the determination of marking probability is the key to influence the convergence, the weakest link, and the node bur...
When the probabilistic packet marking technique for traceback and localization of malicious nodes in Wireless Sensor Networks (WSNs), the determination of marking probability is the key to influence the convergence, the weakest link, and the node bur...
2014, 36(2): 390-395.
doi: 10.3724/SP.J.1146.2012.01677
Abstract:
The buffer resource utilization in opportunistic networks can be improved by efficient buffer management strategy. The delivery probability of message is directly related to its necessity of forwarding and buffering. An adaptive buffer management str...
The buffer resource utilization in opportunistic networks can be improved by efficient buffer management strategy. The delivery probability of message is directly related to its necessity of forwarding and buffering. An adaptive buffer management str...
2014, 36(2): 396-402.
doi: 10.3724/SP.J.1146.2013.00367
Abstract:
A fault tolerant virtual network mapping model based on Openflow network is proposed, and it is solved by the ant colony algorithm. In view of the virtual network fault recovery mechanism, a distinction user priority failure recovery algorithm named ...
A fault tolerant virtual network mapping model based on Openflow network is proposed, and it is solved by the ant colony algorithm. In view of the virtual network fault recovery mechanism, a distinction user priority failure recovery algorithm named ...
2014, 36(2): 403-408.
doi: 10.3724/SP.J.1146.2013.00731
Abstract:
This paper presents clustering data gathering algorithm based on multiple cluster heads to enhance the reliability of data gathering and prolong the lifetime of network.First, the network is divided into equal grids, and the nodes in the same grid fo...
This paper presents clustering data gathering algorithm based on multiple cluster heads to enhance the reliability of data gathering and prolong the lifetime of network.First, the network is divided into equal grids, and the nodes in the same grid fo...
2014, 36(2): 409-414.
doi: 10.3724/SP.J.1146.2013.00609
Abstract:
A novel efficient geolocation method for spaceborne Synthetic Aperture Radar (SAR) is proposed based on recursion formulae in this paper. In this method, three groups of recursion formulae are utilized to compute the three-axis position increments be...
A novel efficient geolocation method for spaceborne Synthetic Aperture Radar (SAR) is proposed based on recursion formulae in this paper. In this method, three groups of recursion formulae are utilized to compute the three-axis position increments be...
2014, 36(2): 415-421.
doi: 10.3724/SP.J.1146.2013.00479
Abstract:
In order to analyze quantitatively the effects of Center-Beam Approximation (CBA) on MOtion COmpensation (MOCO) for airborne Interferometric SAR (InSAR), a mathematical model of MOCO residual error under the condition of squint is firstly established...
In order to analyze quantitatively the effects of Center-Beam Approximation (CBA) on MOtion COmpensation (MOCO) for airborne Interferometric SAR (InSAR), a mathematical model of MOCO residual error under the condition of squint is firstly established...
2014, 36(2): 422-427.
doi: 10.3724/SP.J.1146.2013.00426
Abstract:
Accurate estimation of the clutter covariance matrix is the core issue of STAP. The sample covariance matrix estimation method based on maximum likelihood criterion is only applicable to homogeneous environment. For improving the estimation precision...
Accurate estimation of the clutter covariance matrix is the core issue of STAP. The sample covariance matrix estimation method based on maximum likelihood criterion is only applicable to homogeneous environment. For improving the estimation precision...
2014, 36(2): 428-434.
doi: 10.3724/SP.J.1146.2013.00500
Abstract:
The effect of waveform selection on compressive sensing MIMO radar imaging using sparse model and an improved calibration method in the presence of angle imperfections are researched in this paper. Firstly the relationship between ambiguity function ...
The effect of waveform selection on compressive sensing MIMO radar imaging using sparse model and an improved calibration method in the presence of angle imperfections are researched in this paper. Firstly the relationship between ambiguity function ...
2014, 36(2): 435-440.
doi: 10.3724/SP.J.1146.2013.00475
Abstract:
The waiting time between transmitting and receiving time is not used in conventional task scheduling methods for phased array radar in which dell is impartible, thus system scheduling capacity is restrained. Based on analysis of dell interleaving rul...
The waiting time between transmitting and receiving time is not used in conventional task scheduling methods for phased array radar in which dell is impartible, thus system scheduling capacity is restrained. Based on analysis of dell interleaving rul...
2014, 36(2): 441-444.
doi: 10.3724/SP.J.1146.2013.00465
Abstract:
A method of Ground Moving Target Indication (GMTI) for spaceborne multi-channel High Resolution Wide Swath (HRWS) Synthetic Aperture Radar (SAR) system is presented. Firstly, the method utilizes beamforming for clutter suppression, then estimates mov...
A method of Ground Moving Target Indication (GMTI) for spaceborne multi-channel High Resolution Wide Swath (HRWS) Synthetic Aperture Radar (SAR) system is presented. Firstly, the method utilizes beamforming for clutter suppression, then estimates mov...
2014, 36(2): 445-452.
doi: 10.3724/SP.J.1146.2013.00596
Abstract:
In order to suppress range sidelobes and improve anti-deception interference performance of conventional radar, a novel waveform transmitting strategy is proposed for conventional radar using nearly orthogonal waveforms. Given a bunch of polyphase co...
In order to suppress range sidelobes and improve anti-deception interference performance of conventional radar, a novel waveform transmitting strategy is proposed for conventional radar using nearly orthogonal waveforms. Given a bunch of polyphase co...
2014, 36(2): 453-458.
doi: 10.3724/SP.J.1146.2013.00624
Abstract:
The micro-Doppler effect induced by the rotating parts of the target, which provides a new approach for accurate auto radar target recognition, attracts great research attention in recent years. In this paper, taking target with rotating parts for an...
The micro-Doppler effect induced by the rotating parts of the target, which provides a new approach for accurate auto radar target recognition, attracts great research attention in recent years. In this paper, taking target with rotating parts for an...
2014, 36(2): 459-464.
doi: 10.3724/SP.J.1146.2013.00257
Abstract:
A polarization filtering scheme is employed to resolve interference from GSM base station to the radar in practice. By analyzing the existing Auto Polarization Cancellation (APC) algorithm, a new filtering algorithm based on the optimal reception of ...
A polarization filtering scheme is employed to resolve interference from GSM base station to the radar in practice. By analyzing the existing Auto Polarization Cancellation (APC) algorithm, a new filtering algorithm based on the optimal reception of ...
2014, 36(2): 465-470.
doi: 10.3724/SP.J.1146.2013.01142
Abstract:
At present the height of the warhead of ballistic missile is measured by the radio fuze for the burst height control of the warhead, but the reentry environment of the warhead has very high requirement for the measure set of the radio fuze, and there...
At present the height of the warhead of ballistic missile is measured by the radio fuze for the burst height control of the warhead, but the reentry environment of the warhead has very high requirement for the measure set of the radio fuze, and there...
2014, 36(2): 471-475.
doi: 10.3724/SP.J.1146.2013.00499
Abstract:
An ultra-wideband planar antenna with a shallow cavity for the life detection radar is designed. The antenna is composed of a pair of semi-elliptical antenna arms and fed by a compact 1:2 unbalanced to balanced transmission line transformer. For the ...
An ultra-wideband planar antenna with a shallow cavity for the life detection radar is designed. The antenna is composed of a pair of semi-elliptical antenna arms and fed by a compact 1:2 unbalanced to balanced transmission line transformer. For the ...
2014, 36(2): 476-481.
doi: 10.3724/SP.J.1146.2013.00526
Abstract:
A dimensionality reduction method based on modified genetic algorithm is presented under the constraints of fixing the aperture, the number of elements and the minimum element spacing. In order to utilize effectively the freedom of array element, the...
A dimensionality reduction method based on modified genetic algorithm is presented under the constraints of fixing the aperture, the number of elements and the minimum element spacing. In order to utilize effectively the freedom of array element, the...
2014, 36(2): 482-487.
doi: 10.3724/SP.J.1146.2013.00643
Abstract:
A dual band-notched UltraWide Band (UWB) antenna is presented to avoid the interference of service that work in the UWB band such as WiMax and WLAN applications. The dual band-notched characteristics are achieved by employing an arc H-shaped slot on ...
A dual band-notched UltraWide Band (UWB) antenna is presented to avoid the interference of service that work in the UWB band such as WiMax and WLAN applications. The dual band-notched characteristics are achieved by employing an arc H-shaped slot on ...
2014, 36(2): 488-492.
doi: 10.3724/SP.J.1146.2013.00634
Abstract:
Combination of business and Service Oriented Architetures (SOA) is getting more attention of enterprise decision makers. The combination employs information technology to improve the business performance of enterprises. SOA possesses the features of ...
Combination of business and Service Oriented Architetures (SOA) is getting more attention of enterprise decision makers. The combination employs information technology to improve the business performance of enterprises. SOA possesses the features of ...
