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2011 Vol. 33, No. 10
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2011, 33(10): 2287-2292.
doi: 10.3724/SP.J.1146.2011.00157
Abstract:
The capacity of a Mobile User (MU) is analyzed for downlink distributed communication system in multi-cell environment, when MU locates at any position within the cell. Moreover, the closed-form expression of the capacity is derived. Most papers adop...
The capacity of a Mobile User (MU) is analyzed for downlink distributed communication system in multi-cell environment, when MU locates at any position within the cell. Moreover, the closed-form expression of the capacity is derived. Most papers adop...
2011, 33(10): 2293-2299.
doi: 10.3724/SP.J.1146.2011.00197
Abstract:
A joint precoding algorithmZero Force-Tomlinson-Harashima Precoding (ZF-THP) algorithm is proposed based on overlapped clustering model. Then, two problems in existing clustering scheme are investigated and corresponding resolutions are designed by e...
A joint precoding algorithmZero Force-Tomlinson-Harashima Precoding (ZF-THP) algorithm is proposed based on overlapped clustering model. Then, two problems in existing clustering scheme are investigated and corresponding resolutions are designed by e...
2011, 33(10): 2300-2305.
doi: 10.3724/SP.J.1146.2011.00413
Abstract:
There exists circular trap in Circular Viterbi Algorithm (CVA) and deficiencies in CVA-based decoding algorithms of Tail-Biting Convolutional Codes (TBCC). A high efficient decoding algorithm is proposed for TBCC. The checking rule for circular trap ...
There exists circular trap in Circular Viterbi Algorithm (CVA) and deficiencies in CVA-based decoding algorithms of Tail-Biting Convolutional Codes (TBCC). A high efficient decoding algorithm is proposed for TBCC. The checking rule for circular trap ...
2011, 33(10): 2306-2311.
doi: 10.3724/SP.J.1146.2011.00242
Abstract:
To solve the spectrum assignment issue in cognitive network, a new ant optimization algorithm for spectrum assignment is proposed in this paper. In the cognitive radio network model, where primary and secondary users are coexistent, ants visit second...
To solve the spectrum assignment issue in cognitive network, a new ant optimization algorithm for spectrum assignment is proposed in this paper. In the cognitive radio network model, where primary and secondary users are coexistent, ants visit second...
2011, 33(10): 2312-2316.
doi: 10.3724/SP.J.1146.2010.01409
Abstract:
The effective capacity of the multi-user OFDMA (Orthogonal Frequency-Division Multiple Access) system for time-varying channel is characterized. Then to maximize the system average effective capacity, through the Tayler approximation, an asymptotical...
The effective capacity of the multi-user OFDMA (Orthogonal Frequency-Division Multiple Access) system for time-varying channel is characterized. Then to maximize the system average effective capacity, through the Tayler approximation, an asymptotical...
2011, 33(10): 2317-2321.
doi: 10.3724/SP.J.1146.2010.01240
Abstract:
A dual-beam spread spectrum signal based on directional modulation is proposed to increase the difficulty of the wireless communication tapping. The transmitted signal is not only associated with the spread spectrum sequence but also with the azimuth...
A dual-beam spread spectrum signal based on directional modulation is proposed to increase the difficulty of the wireless communication tapping. The transmitted signal is not only associated with the spread spectrum sequence but also with the azimuth...
2011, 33(10): 2322-2327.
doi: 10.3724/SP.J.1146.2011.00263
Abstract:
Cooperative transmission for cognitive radio networks not only enhances the anti-fading capability of the system, but also improves the bandwidth efficiency. But its really a worth considering issue when the relay node should assit the source node to...
Cooperative transmission for cognitive radio networks not only enhances the anti-fading capability of the system, but also improves the bandwidth efficiency. But its really a worth considering issue when the relay node should assit the source node to...
2011, 33(10): 2328-2333.
doi: 10.3724/SP.J.1146.2010.01384
Abstract:
The k-error linear complexity of the output sequences by-bit of single cycle T-function is investigated with the polynomial and the Chan Games algorithm as the main tools. The distribution of k-error linear complexity and k-error linear complexity pr...
The k-error linear complexity of the output sequences by-bit of single cycle T-function is investigated with the polynomial and the Chan Games algorithm as the main tools. The distribution of k-error linear complexity and k-error linear complexity pr...
2011, 33(10): 2334-2339.
doi: 10.3724/SP.J.1146.2010.01202
Abstract:
This paper considers the issue of finding good puncturing patterns for rate-compatible LDPC codes. When studying the puncturing of LDPC codes, Ha, et al. obtain a so-called grouping and sorting puncturing scheme to maximize the number of lower k-SR n...
This paper considers the issue of finding good puncturing patterns for rate-compatible LDPC codes. When studying the puncturing of LDPC codes, Ha, et al. obtain a so-called grouping and sorting puncturing scheme to maximize the number of lower k-SR n...
2011, 33(10): 2340-2346.
doi: 10.3724/SP.J.1146.2010.01445
Abstract:
When the service capacity of a terminal is limited, how to aggregate heterogeneous terminals according to their capacity to support service application is a challenge. This paper proposes a terminal aggregative selection algorithm based on Multi-Obje...
When the service capacity of a terminal is limited, how to aggregate heterogeneous terminals according to their capacity to support service application is a challenge. This paper proposes a terminal aggregative selection algorithm based on Multi-Obje...
2011, 33(10): 2347-2352.
doi: 10.3724/SP.J.1146.2011.00116
Abstract:
At present, virtual network mapping algorithms obtain suboptimal solution based on constraint condition, they still have the issues of solving mapping equations complicatedly, high computation cost and lack of specific path selection method. To addre...
At present, virtual network mapping algorithms obtain suboptimal solution based on constraint condition, they still have the issues of solving mapping equations complicatedly, high computation cost and lack of specific path selection method. To addre...
2011, 33(10): 2353-2357.
doi: 10.3724/SP.J.1146.2011.00199
Abstract:
In most mobile-assisted localization schemes, mobile anchors usually follow predefined scan trajectories or move randomly. When sensors are deployed non-uniformly in various terrains with complex shapes, random and predefined trajectories lead to was...
In most mobile-assisted localization schemes, mobile anchors usually follow predefined scan trajectories or move randomly. When sensors are deployed non-uniformly in various terrains with complex shapes, random and predefined trajectories lead to was...
2011, 33(10): 2358-2363.
doi: 10.3724/SP.J.1146.2011.00275
Abstract:
Considering the issue of energy consumption and robustness in three-Dimensional Wireless Sensor Networks (3D-WSN), this paper builds an energy consumption and robustness trade-off model, and proves that the model has a stable equilibrium solution wit...
Considering the issue of energy consumption and robustness in three-Dimensional Wireless Sensor Networks (3D-WSN), this paper builds an energy consumption and robustness trade-off model, and proves that the model has a stable equilibrium solution wit...
2011, 33(10): 2364-2371.
doi: 10.3724/SP.J.1146.2010.01332
Abstract:
Based on the high data rate evolution of next generation Wireless Local Area Network (WLAN), a cross-layer rate control algorithm of MIMO system is proposed. Firstly, the limit of physical layer rate control algorithm which maximizes the throughput o...
Based on the high data rate evolution of next generation Wireless Local Area Network (WLAN), a cross-layer rate control algorithm of MIMO system is proposed. Firstly, the limit of physical layer rate control algorithm which maximizes the throughput o...
2011, 33(10): 2372-2377.
doi: 10.3724/SP.J.1146.2011.00125
Abstract:
The sparse representation based on overcomplete dictionary is a new signal representation theory. Recent activities in this field concentrate mainly on the study of dictionary design algorithm and sparse decomposition algorithm. In this paper, a nove...
The sparse representation based on overcomplete dictionary is a new signal representation theory. Recent activities in this field concentrate mainly on the study of dictionary design algorithm and sparse decomposition algorithm. In this paper, a nove...
2011, 33(10): 2378-2383.
doi: 10.3724/SP.J.1146.2011.00051
Abstract:
As a nonparametric classification algorithm, K-Nearest Neighbor (KNN) is very efficient and can be easily realized. However, the traditional KNN suggests that the contributions of all K nearest neighbors are equal, which makes it easy to be disturbed...
As a nonparametric classification algorithm, K-Nearest Neighbor (KNN) is very efficient and can be easily realized. However, the traditional KNN suggests that the contributions of all K nearest neighbors are equal, which makes it easy to be disturbed...
2011, 33(10): 2384-2389.
doi: 10.3724/SP.J.1146.2011.00009
Abstract:
A blind audio watermarking algorithm with self-synchronization for copyright protection is proposed. In the application of media copyright management, the decoding results should have a time precision, better robustness and fidelity. However, most of...
A blind audio watermarking algorithm with self-synchronization for copyright protection is proposed. In the application of media copyright management, the decoding results should have a time precision, better robustness and fidelity. However, most of...
2011, 33(10): 2390-2395.
doi: 10.3724/SP.J.1146.2010.00939
Abstract:
In the existing local discriminant analysis methods, weight matrices in objective functions are determined by neighborhood relationship (in original space) of samples before they are projected, without consideration of changes of the neighborhood aft...
In the existing local discriminant analysis methods, weight matrices in objective functions are determined by neighborhood relationship (in original space) of samples before they are projected, without consideration of changes of the neighborhood aft...
2011, 33(10): 2396-2401.
doi: 10.3724/SP.J.1146.2011.00339
Abstract:
In multi-beam bathymetric sonar, noise is one of the most important disadvantageous factors that restrict the estimation precision. Fixed bandwidth filter is currently widely used to suppress noise in sonar systems. On the measuring swath, the impact...
In multi-beam bathymetric sonar, noise is one of the most important disadvantageous factors that restrict the estimation precision. Fixed bandwidth filter is currently widely used to suppress noise in sonar systems. On the measuring swath, the impact...
2011, 33(10): 2402-2406.
doi: 10.3724/SP.J.1146.2011.00255
Abstract:
To solve the problem of estimating two dimensional Direction Of Arrival (DOA) using sparse representation, a novel DOA estimation method is proposed to estimate the DOAs of two-dimensional signals based on sparse representation of space angle. So the...
To solve the problem of estimating two dimensional Direction Of Arrival (DOA) using sparse representation, a novel DOA estimation method is proposed to estimate the DOAs of two-dimensional signals based on sparse representation of space angle. So the...
2011, 33(10): 2407-2412.
doi: 10.3724/SP.J.1146.2011.00070
Abstract:
A conical polarization sensitive conformal array is structured with crossed dipole elements and its data model is built, on the basis of which, a joint two Dimensional Directional Of Arrival (2D DOA) and polarization estimation algorithm is given. In...
A conical polarization sensitive conformal array is structured with crossed dipole elements and its data model is built, on the basis of which, a joint two Dimensional Directional Of Arrival (2D DOA) and polarization estimation algorithm is given. In...
Precession and Structural Parameter Estimation of the Cone-shaped Warhead Based on the Micro-Doppler
2011, 33(10): 2413-2419.
doi: 10.3724/SP.J.1146.2011.00120
Abstract:
Micro-motion feature is one of the effective features used for radar target recognition in the middle section of the ballistic curve. The micro-Doppler expressions of the scattering center at the conical point and two sliding scattering centers in th...
Micro-motion feature is one of the effective features used for radar target recognition in the middle section of the ballistic curve. The micro-Doppler expressions of the scattering center at the conical point and two sliding scattering centers in th...
2011, 33(10): 2420-2426.
doi: 10.3724/SP.J.1146.2010.01138
Abstract:
A novel approach to moving target detection is proposed for multi-channel SAR system. This approach utilizes multistage Wiener filter to suppress clutter. To improve performance of moving target detection in heterogeneous clutter environment, this ne...
A novel approach to moving target detection is proposed for multi-channel SAR system. This approach utilizes multistage Wiener filter to suppress clutter. To improve performance of moving target detection in heterogeneous clutter environment, this ne...
2011, 33(10): 2427-2432.
doi: 10.3724/SP.J.1146.2011.00117
Abstract:
A new method is proposed to estimate micro-motion parameters of space precession targets. Based on the micro-Doppler characteristic of a precession target, the Fourier transformation is applied to estimate precession parameters roughly. Then based on...
A new method is proposed to estimate micro-motion parameters of space precession targets. Based on the micro-Doppler characteristic of a precession target, the Fourier transformation is applied to estimate precession parameters roughly. Then based on...
2011, 33(10): 2433-2437.
doi: 10.3724/SP.J.1146.2010.01412
Abstract:
The adaptive detection of signal embedded in compound Gaussian clutter of nonhomogeneous environments, i.e., the training samples used for adaption do not share the same covariance matrix as the vector under test is considered in this paper, and the ...
The adaptive detection of signal embedded in compound Gaussian clutter of nonhomogeneous environments, i.e., the training samples used for adaption do not share the same covariance matrix as the vector under test is considered in this paper, and the ...
2011, 33(10): 2438-2444.
doi: 10.3724/SP.J.1146.2011.00123
Abstract:
A comprehensive and systematic study of the operational imaging modes for the Spaceborne/Airborne hybrid Bistatic SAR (SA-BiSAR) is made firstly, including imaging geometry, echo equation, scene width, Doppler history, and resolutions and so on. To o...
A comprehensive and systematic study of the operational imaging modes for the Spaceborne/Airborne hybrid Bistatic SAR (SA-BiSAR) is made firstly, including imaging geometry, echo equation, scene width, Doppler history, and resolutions and so on. To o...
2011, 33(10): 2445-2451.
doi: 10.3724/SP.J.1146.2011.00225
Abstract:
This paper proposes a new full-aperture imaging algorithm for ScanSAR. Firstly, the two dimensional (2-D) spectrum is obtained by the azimuth pro-filtering which adopts the idea of SPECAN. Then the Nonlinear Chirp Scaling (NCS) method is used to comp...
This paper proposes a new full-aperture imaging algorithm for ScanSAR. Firstly, the two dimensional (2-D) spectrum is obtained by the azimuth pro-filtering which adopts the idea of SPECAN. Then the Nonlinear Chirp Scaling (NCS) method is used to comp...
2011, 33(10): 2452-2457.
doi: 10.3724/SP.J.1146.2011.00287
Abstract:
The number of antenna elements of MIMO radar is too many when imaging for moving target with single snapshot. To solve the problem, an imaging method for MIMO radar with sparse array is proposed. Firstly the configuration of sparse antenna array is a...
The number of antenna elements of MIMO radar is too many when imaging for moving target with single snapshot. To solve the problem, an imaging method for MIMO radar with sparse array is proposed. Firstly the configuration of sparse antenna array is a...
2011, 33(10): 2458-2463.
doi: 10.3724/SP.J.1146.2011.00012
Abstract:
Synthetic aperture radar can obtain two-dimensional high resolution radar images, but it has to work in side-looking mode without forward-looking imaging capability, and can not focus stationary and moving targets simultaneously as well. Virtual aper...
Synthetic aperture radar can obtain two-dimensional high resolution radar images, but it has to work in side-looking mode without forward-looking imaging capability, and can not focus stationary and moving targets simultaneously as well. Virtual aper...
2011, 33(10): 2464-2470.
doi: 10.3724/SP.J.1146.2011.00028
Abstract:
This paper focuses on the system error correction of a millimeter-wave three-baseline InSAR. The system error correction scheme is presented, in order to achieve the signal amplitude and phase consistency between three channels. The effect of pulse c...
This paper focuses on the system error correction of a millimeter-wave three-baseline InSAR. The system error correction scheme is presented, in order to achieve the signal amplitude and phase consistency between three channels. The effect of pulse c...
2011, 33(10): 2471-2476.
doi: 10.3724/SP.J.1146.2011.00105
Abstract:
The influence of SAR system resolution to the image power spectrum density is represented. The one-dimensional circular power spectrum of SAR image is modeled based on negative exponent function and the relationship between the SNR of scene matching ...
The influence of SAR system resolution to the image power spectrum density is represented. The one-dimensional circular power spectrum of SAR image is modeled based on negative exponent function and the relationship between the SNR of scene matching ...
2011, 33(10): 2477-2482.
doi: 10.3724/SP.J.1146.2011.00193
Abstract:
Based on the bistatic scattering coefficients deduced from perturbation method and the simulated data of bistatic sea echo spectrum, Howells algorithm is adopted to derive the wave-number spectrum and to extract the information of significant wave he...
Based on the bistatic scattering coefficients deduced from perturbation method and the simulated data of bistatic sea echo spectrum, Howells algorithm is adopted to derive the wave-number spectrum and to extract the information of significant wave he...
2011, 33(10): 2483-2488.
doi: 10.3724/SP.J.1146.2011.00231
Abstract:
An algorithm for multi-target three-dimensional (3D) localization in bistatic Multiple-Input Multiple- Output (MIMO) radar system with uniform linear transmit array and L-shape receive array is presented. After forming a complex matrix based on ESPRI...
An algorithm for multi-target three-dimensional (3D) localization in bistatic Multiple-Input Multiple- Output (MIMO) radar system with uniform linear transmit array and L-shape receive array is presented. After forming a complex matrix based on ESPRI...
2011, 33(10): 2489-2493.
doi: 10.3724/SP.J.1146.2011.00132
Abstract:
According to the signal structure of China Mobile Multimedia Broadcasting (CMMB), this paper analyzes the ambiguity function of CMMB signal as illuminator of opportunity for passive radar systems. The mechanism of these ambiguity peaks is researched ...
According to the signal structure of China Mobile Multimedia Broadcasting (CMMB), this paper analyzes the ambiguity function of CMMB signal as illuminator of opportunity for passive radar systems. The mechanism of these ambiguity peaks is researched ...
2011, 33(10): 2494-2499.
doi: 10.3724/SP.J.1146.2011.00147
Abstract:
In the paper, the percentage of the Intrinsic Mode Function (IMFs) energy in the whole sea clutter energy is analyzed, the percentage variation affected by the target is discussed. As shown of the results, the energy of the pure sea clutter is focuse...
In the paper, the percentage of the Intrinsic Mode Function (IMFs) energy in the whole sea clutter energy is analyzed, the percentage variation affected by the target is discussed. As shown of the results, the energy of the pure sea clutter is focuse...
2011, 33(10): 2500-2505.
doi: 10.3724/SP.J.1146.2011.00053
Abstract:
To accelerate the locking speed of the Digitally Controlled Phase-Locked Loop (DCPLL), a Dynamic Bandwidth Management (DBM) algorithm for DCPLL is presented. Only when the phase error sensed by the phase detector is less than the boundary condition f...
To accelerate the locking speed of the Digitally Controlled Phase-Locked Loop (DCPLL), a Dynamic Bandwidth Management (DBM) algorithm for DCPLL is presented. Only when the phase error sensed by the phase detector is less than the boundary condition f...
2011, 33(10): 2506-2510.
doi: 10.3724/SP.J.1146.2011.00085
Abstract:
Considering that the Code-Aided (CA) carrier recovery algorithms perform small synchronization range and big inaccuracy in extremely low Signal to Noise Ratio (SNR) deep space communication systems, two joint assisted carrier synchronization algorith...
Considering that the Code-Aided (CA) carrier recovery algorithms perform small synchronization range and big inaccuracy in extremely low Signal to Noise Ratio (SNR) deep space communication systems, two joint assisted carrier synchronization algorith...
2011, 33(10): 2511-2515.
doi: 10.3724/SP.J.1146.2011.00290
Abstract:
In the Orthogonal Frequency Division Multiplexing (OFDM) systems, based on the studying of Peak to Average Power Ratio (PAPR) reduction by using Partial Transmit Sequence (PTS) technology, an improved PTS scheme of multi-stage optimization is propose...
In the Orthogonal Frequency Division Multiplexing (OFDM) systems, based on the studying of Peak to Average Power Ratio (PAPR) reduction by using Partial Transmit Sequence (PTS) technology, an improved PTS scheme of multi-stage optimization is propose...
2011, 33(10): 2516-2520.
doi: 10.3724/SP.J.1146.2011.00239
Abstract:
Reasonable clustering algorithm can prolong the Large Scale Wireless Sensor Network (LS-WSN) lifetime, so as to reduce the cost of using it. Up to now, most research on WSN clustering assumes that the nodes in WSN are uniformly distributed. But this ...
Reasonable clustering algorithm can prolong the Large Scale Wireless Sensor Network (LS-WSN) lifetime, so as to reduce the cost of using it. Up to now, most research on WSN clustering assumes that the nodes in WSN are uniformly distributed. But this ...
2011, 33(10): 2521-2525.
doi: 10.3724/SP.J.1146.2011.00270
Abstract:
In order to achieve bit synchronization of high-dynamic and weak GPS signal, a bit synchronization method based on differential coherent accumulation is proposed, called differential accumulation method. With this method, every one of complex samples...
In order to achieve bit synchronization of high-dynamic and weak GPS signal, a bit synchronization method based on differential coherent accumulation is proposed, called differential accumulation method. With this method, every one of complex samples...
2011, 33(10): 2526-2530.
doi: 10.3724/SP.J.1146.2011.00298
Abstract:
Due to suppression the influence of impulsive noise spikes (outliers) from desired signal direction of arrival in Global Positioning System (GPS) signals, an improved Householder-based MultiStage Wiener Filter (HMSWF) is proposed. The method substitu...
Due to suppression the influence of impulsive noise spikes (outliers) from desired signal direction of arrival in Global Positioning System (GPS) signals, an improved Householder-based MultiStage Wiener Filter (HMSWF) is proposed. The method substitu...
2011, 33(10): 2531-2535.
doi: 10.3724/SP.J.1146.2011.00153
Abstract:
Since human face movements distribute on a nonlinear manifold, there are inherent alignment residuals brought by the global linearity hypothesis in the traditional Principal Component Analysis (PCA) based Active Appearance Models (AAM). In this paper...
Since human face movements distribute on a nonlinear manifold, there are inherent alignment residuals brought by the global linearity hypothesis in the traditional Principal Component Analysis (PCA) based Active Appearance Models (AAM). In this paper...
2011, 33(10): 2536-2540.
doi: 10.3724/SP.J.1146.2011.00363
Abstract:
Betweenness centrality is a widely used indicator to measure the node importance in complex network s, but it is computationally-expensive to calculate betweenness centrality. In this paper, analysis on the traditional betweenness centrality algorith...
Betweenness centrality is a widely used indicator to measure the node importance in complex network s, but it is computationally-expensive to calculate betweenness centrality. In this paper, analysis on the traditional betweenness centrality algorith...
