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2012 Vol. 34, No. 10
Display Method:
2012, 34(10): 2287-2292.
doi: 10.3724/SP.J.1146.2012.00542
Abstract:
Femtocell is a promising technology to enhance indoor coverage and system capacity. However, the interference impairs greatly the network performance for spectrum-sharing OFDMA femtocell networks. This paper investigates a power control scheme for th...
Femtocell is a promising technology to enhance indoor coverage and system capacity. However, the interference impairs greatly the network performance for spectrum-sharing OFDMA femtocell networks. This paper investigates a power control scheme for th...
2012, 34(10): 2293-2298.
doi: 10.3724/SP.J.1146.2012.00314
Abstract:
Performance is analyzed of the multiple two-way relaying systems with three-slot Time Division BroadCast (TDBC) protocol employing adaptive modulation. The end-to-end SINR of the system is presented when channel estimation error exists. Then the dist...
Performance is analyzed of the multiple two-way relaying systems with three-slot Time Division BroadCast (TDBC) protocol employing adaptive modulation. The end-to-end SINR of the system is presented when channel estimation error exists. Then the dist...
2012, 34(10): 2299-2305.
doi: 10.3724/SP.J.1146.2012.00184
Abstract:
In this paper, a common process of compressed channel estimation is given by the Bayesian Compressed Sensing (BCS) which is based on the probability principle of Maximum A Posteriori (MAP). In the process, signal reconstruction and measurement matrix...
In this paper, a common process of compressed channel estimation is given by the Bayesian Compressed Sensing (BCS) which is based on the probability principle of Maximum A Posteriori (MAP). In the process, signal reconstruction and measurement matrix...
2012, 34(10): 2306-2313.
doi: 10.3724/SP.J.1146.2012.00128
Abstract:
This paper describes a class of offset carrier modulations for Direct Sequence-Spreal Spectrum (DS- SS) called Harmonic Offset Carrier (HOC) modulations. The spread spectrum waveform of HOC signal is composed of spreading code modulated by harmonic s...
This paper describes a class of offset carrier modulations for Direct Sequence-Spreal Spectrum (DS- SS) called Harmonic Offset Carrier (HOC) modulations. The spread spectrum waveform of HOC signal is composed of spreading code modulated by harmonic s...
2012, 34(10): 2314-2319.
doi: 10.3724/SP.J.1146.2012.00341
Abstract:
This paper proposes a scheme of network coding for asymmetric data transmission in three-point cooperative communication system. Since the joint using both cooperative diversity and network coding, the diversity gain and coding gain are achieved in w...
This paper proposes a scheme of network coding for asymmetric data transmission in three-point cooperative communication system. Since the joint using both cooperative diversity and network coding, the diversity gain and coding gain are achieved in w...
2012, 34(10): 2320-2325.
doi: 10.3724/SP.J.1146.2012.00161
Abstract:
Opportunistic relaying coded cooperation is already an efficient and widely investigated cooperative scheme in multi-relay networks. However, the previous works still have deficiencies, such as high system complexity and low resource utilization. In ...
Opportunistic relaying coded cooperation is already an efficient and widely investigated cooperative scheme in multi-relay networks. However, the previous works still have deficiencies, such as high system complexity and low resource utilization. In ...
2012, 34(10): 2326-2330.
doi: 10.3724/SP.J.1146.2012.00349
Abstract:
To solve the estimation problem of multipath channel parameters in CDMA mobile satellite communications, a two-dimensional searching algorithm based on maximum likelihood estimation is proposed. The proposed algorithm searches for delays of two paths...
To solve the estimation problem of multipath channel parameters in CDMA mobile satellite communications, a two-dimensional searching algorithm based on maximum likelihood estimation is proposed. The proposed algorithm searches for delays of two paths...
2012, 34(10): 2331-2335.
doi: 10.3724/SP.J.1146.2012.00384
Abstract:
For improving communication system power efficiency and spectrum efficiency, an orthogonal Prolate Spheroidal Wave Functions (PSWF) pulse modulation method is proposed. The system power efficiency can be improved by using PSWF with high energy concen...
For improving communication system power efficiency and spectrum efficiency, an orthogonal Prolate Spheroidal Wave Functions (PSWF) pulse modulation method is proposed. The system power efficiency can be improved by using PSWF with high energy concen...
A Multi-stage Motion Estimation Algorithm Based on 3-D Recursive Search for Frame Rate up Conversion
2012, 34(10): 2336-2341.
doi: 10.3724/SP.J.1146.2012.00507
Abstract:
Motion-Compensated Frame Interpolation (MCFI) is a primary method for frame rate up conversion. A multi-stage block-matching motion estimation algorithm based on 3-D Recursive Search (3-D RS) is proposed in this paper to decrease the block artifact i...
Motion-Compensated Frame Interpolation (MCFI) is a primary method for frame rate up conversion. A multi-stage block-matching motion estimation algorithm based on 3-D Recursive Search (3-D RS) is proposed in this paper to decrease the block artifact i...
2012, 34(10): 2342-2347.
doi: 10.3724/SP.J.1146.2011.01297
Abstract:
A scheme is proposed for transmission of wavelet-based progressive image coding over packet erasure channel. The scheme uses layered multiple description coding to improve the error resilience performance of the source coding, and uses channel coding...
A scheme is proposed for transmission of wavelet-based progressive image coding over packet erasure channel. The scheme uses layered multiple description coding to improve the error resilience performance of the source coding, and uses channel coding...
A Laplacian-Cauchy Mixture Model for Improved Correlation Noise Modeling in Distributed Video Coding
2012, 34(10): 2348-2352.
doi: 10.3724/SP.J.1146.2012.00317
Abstract:
A novel Laplacian-Cauchy Mixture Distribution (LCMD) model is proposed to characterize the distribution of correlation noise between the original Wyner-Ziv frame and the side information in transform domain distributed video coding schemes. Observing...
A novel Laplacian-Cauchy Mixture Distribution (LCMD) model is proposed to characterize the distribution of correlation noise between the original Wyner-Ziv frame and the side information in transform domain distributed video coding schemes. Observing...
2012, 34(10): 2353-2357.
doi: 10.3724/SP.J.1146.2012.00242
Abstract:
Private information retrieval is the important issue of secure multi-party computation. Many assumptions of traditional Symmetric Private Information Retrieval (SPIR) are vulnerable in quantum mechanics and the present quantum SPIR protocols are comp...
Private information retrieval is the important issue of secure multi-party computation. Many assumptions of traditional Symmetric Private Information Retrieval (SPIR) are vulnerable in quantum mechanics and the present quantum SPIR protocols are comp...
2012, 34(10): 2358-2362.
doi: 10.3724/SP.J.1146.2012.00329
Abstract:
In this paper, a new class of rotation symmetric Boolean functions with good cryptographic properties are constructed when the number of variables is 2m. These constructed functions are balanced, and have maximum algebraic immunity, optimum algebraic...
In this paper, a new class of rotation symmetric Boolean functions with good cryptographic properties are constructed when the number of variables is 2m. These constructed functions are balanced, and have maximum algebraic immunity, optimum algebraic...
2012, 34(10): 2363-2368.
doi: 10.3724/SP.J.1146.2012.00497
Abstract:
In view of the fast development of information countermeasure and intelligent communication, recognition of channel coding has been a vital issue in information interception. This paper proposes a new method of recognition in order to recognize the(n...
In view of the fast development of information countermeasure and intelligent communication, recognition of channel coding has been a vital issue in information interception. This paper proposes a new method of recognition in order to recognize the(n...
2012, 34(10): 2369-2374.
doi: 10.3724/SP.J.1146.2012.00331
Abstract:
Due to the characteristics of the mobile device, it is difficult to implement the existing network discovery algorithm based on clique in mobile social network. In order to solve the problem, through analyzing the mobile user behaviors, an algorithm ...
Due to the characteristics of the mobile device, it is difficult to implement the existing network discovery algorithm based on clique in mobile social network. In order to solve the problem, through analyzing the mobile user behaviors, an algorithm ...
2012, 34(10): 2375-2381.
doi: 10.3724/SP.J.1146.2012.00361
Abstract:
Wireless Sensor Networks (WSNs) have such characteristics as energy depletion and nodes random failure fault caused by harsh environment. So in this paper, a Fault-tolerant Topology Control Approach (FTCA), which can optimize node energy and random f...
Wireless Sensor Networks (WSNs) have such characteristics as energy depletion and nodes random failure fault caused by harsh environment. So in this paper, a Fault-tolerant Topology Control Approach (FTCA), which can optimize node energy and random f...
2012, 34(10): 2382-2388.
doi: 10.3724/SP.J.1146.2011.01313
Abstract:
Considering the high computational cost and complex object representation problems in human tracking, this paper presents a model-free tracking approach using a combination of multiple spatial-temporal slices. The human is represented with a variable...
Considering the high computational cost and complex object representation problems in human tracking, this paper presents a model-free tracking approach using a combination of multiple spatial-temporal slices. The human is represented with a variable...
2012, 34(10): 2389-2395.
doi: 10.3724/SP.J.1146.2011.00789
Abstract:
This paper presents a blind color image watermarking scheme using the combination of the holistic transformation of Quaternion Fourier Transformation (QFT) and Quaternion Singular Value Decomposition (QSVD). The host image is first divided into block...
This paper presents a blind color image watermarking scheme using the combination of the holistic transformation of Quaternion Fourier Transformation (QFT) and Quaternion Singular Value Decomposition (QSVD). The host image is first divided into block...
2012, 34(10): 2396-2401.
doi: 10.3724/SP.J.1146.2011.01082
Abstract:
Improved Local Tangent Space Alignment (ILTSA) is a recent manifold learning method. In this paper, based on linearization and discriminant extension of ILTSA, a novel feature extraction method named Discriminant ILTSA (DILTSA) is proposed with its t...
Improved Local Tangent Space Alignment (ILTSA) is a recent manifold learning method. In this paper, based on linearization and discriminant extension of ILTSA, a novel feature extraction method named Discriminant ILTSA (DILTSA) is proposed with its t...
2012, 34(10): 2402-2408.
doi: 10.3724/SP.J.1146.2012.00158
Abstract:
In traditional Gaussian Mixture Modeling (GMM) algorithm, the risk that foreground model changes into background model rises with the cumulating of model weight under certain learning rate. That makes the algorithm unable to deal with slow moving obj...
In traditional Gaussian Mixture Modeling (GMM) algorithm, the risk that foreground model changes into background model rises with the cumulating of model weight under certain learning rate. That makes the algorithm unable to deal with slow moving obj...
2012, 34(10): 2409-2414.
doi: 10.3724/SP.J.1146.2012.00357
Abstract:
A new forensics method is proposed to detect asymmetric cropping. According to the method, the inconsistency of the principal point is used as evidence of cropping, and the camera calibration method is introduced to estimate the principal point. The ...
A new forensics method is proposed to detect asymmetric cropping. According to the method, the inconsistency of the principal point is used as evidence of cropping, and the camera calibration method is introduced to estimate the principal point. The ...
2012, 34(10): 2415-2420.
doi: 10.3724/SP.J.1146.2012.00286
Abstract:
The orthogonal pulse design based on Prolate Spheroidal Wave Function (PSWF) is hard for hardware design. By the optimization and integration of the pulse solution and orthogonalizaiton procedure, a novel orthogonal PSWF pulse waveform design based o...
The orthogonal pulse design based on Prolate Spheroidal Wave Function (PSWF) is hard for hardware design. By the optimization and integration of the pulse solution and orthogonalizaiton procedure, a novel orthogonal PSWF pulse waveform design based o...
2012, 34(10): 2421-2426.
doi: 10.3724/SP.J.1146.2011.01407
Abstract:
To solve the degradation of robustness against array steering vector error with finite snapshot in the adaptive beamformer, a novel single-channel robust adaptive beamforming algorithm based on Compressive Sensing (CS) is derived. A single-channel ar...
To solve the degradation of robustness against array steering vector error with finite snapshot in the adaptive beamformer, a novel single-channel robust adaptive beamforming algorithm based on Compressive Sensing (CS) is derived. A single-channel ar...
2012, 34(10): 2427-2431.
doi: 10.3724/SP.J.1146.2012.00350
Abstract:
The existing algorithms for Prolate Spheroidal Wave Functions (PSWFs) have poor efficiency, high complexity in hardware implementation and especially uncontrollable precision. To overcome the above weaknesses, a new algorithm based on state transitio...
The existing algorithms for Prolate Spheroidal Wave Functions (PSWFs) have poor efficiency, high complexity in hardware implementation and especially uncontrollable precision. To overcome the above weaknesses, a new algorithm based on state transitio...
2012, 34(10): 2432-2438.
doi: 10.3724/SP.J.1146.2012.00460
Abstract:
Infrared ship segmentation is very important for automatic infrared ship recognition in the sea. The thresholding based algorithms are widely applied to segmentation due to the intrinsic merits. The threshold is set based on the assumption that the i...
Infrared ship segmentation is very important for automatic infrared ship recognition in the sea. The thresholding based algorithms are widely applied to segmentation due to the intrinsic merits. The threshold is set based on the assumption that the i...
2012, 34(10): 2439-2444.
doi: 10.3724/SP.J.1146.2012.00069
Abstract:
In accordance with the problem of failure tracking in coherent composite code tracking loop leaded by greater carrier phase tracking error, a non-coherent tracking loop is proposed in this paper. The methods of constructing composite Pseudo-Noise (PN...
In accordance with the problem of failure tracking in coherent composite code tracking loop leaded by greater carrier phase tracking error, a non-coherent tracking loop is proposed in this paper. The methods of constructing composite Pseudo-Noise (PN...
2012, 34(10): 2445-2450.
doi: 10.3724/SP.J.1146.2012.00366
Abstract:
Terrain Observation by Progressive scans SAR (TOPSAR) is a new and prospective mode of space-borne SAR. It keeps the wide swath advantage of ScanSAR, and solves the problems as scalloping. The signal of TOPSAR is alias in both frequency domain and ti...
Terrain Observation by Progressive scans SAR (TOPSAR) is a new and prospective mode of space-borne SAR. It keeps the wide swath advantage of ScanSAR, and solves the problems as scalloping. The signal of TOPSAR is alias in both frequency domain and ti...
2012, 34(10): 2451-2457.
doi: 10.3724/SP.J.1146.2012.00308
Abstract:
In this paper, the issue of volume scattering overestimation as all known existing in Freeman decomposition is analyzed in detail, and a three-component decomposition model based on de-orientation and a generalized volume scattering model is presente...
In this paper, the issue of volume scattering overestimation as all known existing in Freeman decomposition is analyzed in detail, and a three-component decomposition model based on de-orientation and a generalized volume scattering model is presente...
2012, 34(10): 2458-2465.
doi: 10.3724/SP.J.1146.2012.00297
Abstract:
Due to wind turbulence and flight instability, the flight trajectories of drones often exhibit highly variety in position and attitude. The deviation from linear stable paths causes non-uniform illuminating energy of Synthetic Aperture Radar (SAR) sy...
Due to wind turbulence and flight instability, the flight trajectories of drones often exhibit highly variety in position and attitude. The deviation from linear stable paths causes non-uniform illuminating energy of Synthetic Aperture Radar (SAR) sy...
The Long-range Dependence Characteristic Analysis of Sea Clutter Based on the Semivariogram Function
2012, 34(10): 2466-2469.
doi: 10.3724/SP.J.1146.2011.01341
Abstract:
A target detection method based on the long-range dependence characteristic of sea clutter is proposed. By using the semivariogram function, the long-range dependence feature curve of sea clutter versus time is obtained. According to the curve, we su...
A target detection method based on the long-range dependence characteristic of sea clutter is proposed. By using the semivariogram function, the long-range dependence feature curve of sea clutter versus time is obtained. According to the curve, we su...
2012, 34(10): 2470-2474.
doi: 10.3724/SP.J.1146.2012.00382
Abstract:
Insufficient samples result in estimation error of covariance matrix for Space-Time Adaptive Process (STAP), a merged method of multi-frequency space-time data is presented to improve the estimation accuracy. Based on the analysis of clutter characte...
Insufficient samples result in estimation error of covariance matrix for Space-Time Adaptive Process (STAP), a merged method of multi-frequency space-time data is presented to improve the estimation accuracy. Based on the analysis of clutter characte...
2012, 34(10): 2475-2481.
doi: 10.3724/SP.J.1146.2012.00079
Abstract:
In this paper, the preprocessing method for the visibility functions in synthetic aperture radiometer is proposed, including the correction on the AD bias, the inversion of the analog correlation from the raw 3-level digitized correlation, the correc...
In this paper, the preprocessing method for the visibility functions in synthetic aperture radiometer is proposed, including the correction on the AD bias, the inversion of the analog correlation from the raw 3-level digitized correlation, the correc...
2012, 34(10): 2482-2488.
doi: 10.3724/SP.J.1146.2012.00276
Abstract:
In order to achieve reasonable and reliable results of directional spectrum used in wave measurement of Acoustic Doppler Current Profiler (ADCP), three practical inversion algorithms based on array measurement are analyzed on performance in theory an...
In order to achieve reasonable and reliable results of directional spectrum used in wave measurement of Acoustic Doppler Current Profiler (ADCP), three practical inversion algorithms based on array measurement are analyzed on performance in theory an...
2012, 34(10): 2489-2493.
doi: 10.3724/SP.J.1146.2012.00299
Abstract:
This paper presents a method of double-probe electric field in-orbit detection. Differences of three kinds of instrument including double-probe type, antenna type and electron drift type are briefly introduced. The principle，architecture and calibrat...
This paper presents a method of double-probe electric field in-orbit detection. Differences of three kinds of instrument including double-probe type, antenna type and electron drift type are briefly introduced. The principle，architecture and calibrat...
2012, 34(10): 2494-2500.
doi: 10.3724/SP.J.1146.2012.00402
Abstract:
Cyber-Physical System (CPS) components substitution is an important issue for CPS troubleshooting and system upgrading. Based on a service-oriented architecture of CPS, this issue is equated to CPS service substitution. A formal method for modeling C...
Cyber-Physical System (CPS) components substitution is an important issue for CPS troubleshooting and system upgrading. Based on a service-oriented architecture of CPS, this issue is equated to CPS service substitution. A formal method for modeling C...
2012, 34(10): 2501-2507.
doi: 10.3724/SP.J.1146.2012.00099
Abstract:
In the system of Network on Chip (NoC), local systems normally adopt bus-based architectures while global networks use packet-based communications. However, since the natural difference between these two architectures is unavoidable, it introduces pe...
In the system of Network on Chip (NoC), local systems normally adopt bus-based architectures while global networks use packet-based communications. However, since the natural difference between these two architectures is unavoidable, it introduces pe...
2012, 34(10): 2508-2513.
doi: 10.3724/SP.J.1146.2012.00375
Abstract:
With the deficiency of the efficient of the Boolean SATisfiability (SAT) in the nano-meter CMOS circuit (CMOS/nanowire/MOLecular, CMOL) cell assignment resulted from the huge number of clauses and the big intermediate processing file, a novel approac...
With the deficiency of the efficient of the Boolean SATisfiability (SAT) in the nano-meter CMOS circuit (CMOS/nanowire/MOLecular, CMOL) cell assignment resulted from the huge number of clauses and the big intermediate processing file, a novel approac...
2012, 34(10): 2514-2519.
doi: 10.3724/SP.J.1146.2012.00447
Abstract:
By researching the adiabatic domino circuit and the adder, a novel design of low power ternary adder on switch-level is proposed. First, the switch-level structure of ternary adders summing circuit and carrying circuit are derived according to the sw...
By researching the adiabatic domino circuit and the adder, a novel design of low power ternary adder on switch-level is proposed. First, the switch-level structure of ternary adders summing circuit and carrying circuit are derived according to the sw...
2012, 34(10): 2520-2526.
doi: 10.3724/SP.J.1146.2012.00376
Abstract:
Recently Fang et al. (2011) proposed a password-based remote user authentication scheme using smart cards for resource-constrained environment, and claimed that their scheme was secure and practical. However, it is found that their scheme can not ach...
Recently Fang et al. (2011) proposed a password-based remote user authentication scheme using smart cards for resource-constrained environment, and claimed that their scheme was secure and practical. However, it is found that their scheme can not ach...
2012, 34(10): 2527-2531.
doi: 10.3724/SP.J.1146.2011.01199
Abstract:
To solve the power allocation collision in decentralized cognitive radio networks with asymmetric channel state information, a new Signaling Games (SG) based power control algorithm is proposed. The competitive secondary users allocate power using si...
To solve the power allocation collision in decentralized cognitive radio networks with asymmetric channel state information, a new Signaling Games (SG) based power control algorithm is proposed. The competitive secondary users allocate power using si...
2012, 34(10): 2532-2536.
doi: 10.3724/SP.J.1146.2012.00290
Abstract:
The performance of subspace estimation algorithms degrades substantially in the presence of mutual coupling and coherent environments by the perturbance of steering matrix and the rank defect of covariance matrix. In order to settle these issues, a n...
The performance of subspace estimation algorithms degrades substantially in the presence of mutual coupling and coherent environments by the perturbance of steering matrix and the rank defect of covariance matrix. In order to settle these issues, a n...
2012, 34(10): 2537-2540.
doi: 10.3724/SP.J.1146.2012.00141
Abstract:
According to the equivalent circuit of the mushroom-like Electromagnetic Band Gap (EBG) structure, a novel method of inserting the Inter-Digital Capacitor (IDC) to broaden the bandwidth of the stop-band is proposed in this paper. The T-shaped IDC EBG...
According to the equivalent circuit of the mushroom-like Electromagnetic Band Gap (EBG) structure, a novel method of inserting the Inter-Digital Capacitor (IDC) to broaden the bandwidth of the stop-band is proposed in this paper. The T-shaped IDC EBG...
