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2010 Vol. 32, No. 8
Display Method:
2010, 32(8): 1779-1785.
doi: 10.3724/SP.J.1146.2009.01194
Abstract:
Image quality estimation is an important part of performance evaluation for Automatic Target Recognition (ATR). Traditional image metrics are focused on single image, and there is no valid method to estimate the quality of image sequence. According t...
Image quality estimation is an important part of performance evaluation for Automatic Target Recognition (ATR). Traditional image metrics are focused on single image, and there is no valid method to estimate the quality of image sequence. According t...
2010, 32(8): 1786-1791.
doi: 10.3724/SP.J.1146.2009.01120
Abstract:
Diffusion Tensor Magnetic Resonance Imaging (DT-MRI) can track the brain white matter fiber by tracing the local tensor orientation and reconstruct the three dimensional image noninvasively. The commonly used tracking method is usually based on the l...
Diffusion Tensor Magnetic Resonance Imaging (DT-MRI) can track the brain white matter fiber by tracing the local tensor orientation and reconstruct the three dimensional image noninvasively. The commonly used tracking method is usually based on the l...
2010, 32(8): 1792-1796.
doi: 10.3724/SP.J.1146.2009.00922
Abstract:
A novel color image segmentation method is proposed in this paper. Multidimensional space is defined by using the PCA technique to computing the most discriminating color components for a given color image among a set of conventional color spaces. Th...
A novel color image segmentation method is proposed in this paper. Multidimensional space is defined by using the PCA technique to computing the most discriminating color components for a given color image among a set of conventional color spaces. Th...
2010, 32(8): 1797-1801.
doi: 10.3724/SP.J.1146.2009.01210
Abstract:
A novel signal model with missing-data is proposed to directly blindly despread the long-code Direct Sequence Spread Spectrum (DS-SS) signals with unknown carrier frequency. The long-code DS-SS signals are represented as the short-code ones with miss...
A novel signal model with missing-data is proposed to directly blindly despread the long-code Direct Sequence Spread Spectrum (DS-SS) signals with unknown carrier frequency. The long-code DS-SS signals are represented as the short-code ones with miss...
2010, 32(8): 1802-1805.
doi: 10.3724/SP.J.1146.2009.00718
Abstract:
The Chinese remainder theorem is not robust in the sense that a small error in its remainders may cause a large error in the determined integer by the CRT. In this paper, a Generalized Robust Chinese Remainder Theorem (GRCRT) is presented when moduli...
The Chinese remainder theorem is not robust in the sense that a small error in its remainders may cause a large error in the determined integer by the CRT. In this paper, a Generalized Robust Chinese Remainder Theorem (GRCRT) is presented when moduli...
2010, 32(8): 1806-1811.
doi: 10.3724/SP.J.1146.2009.01015
Abstract:
The modeling and reasoning with uncertain context information is one of key problems of building context-aware applications in pervasive computing environment. In this paper, a method of modeling uncertain contexts is proposed by combining the D-S th...
The modeling and reasoning with uncertain context information is one of key problems of building context-aware applications in pervasive computing environment. In this paper, a method of modeling uncertain contexts is proposed by combining the D-S th...
2010, 32(8): 1812-1817.
doi: 10.3724/SP.J.1146.2009.01127
Abstract:
Spatial motion feature is one of main target features for missile target identification. This paper investigates micro-motion of the missile target. Time-frequency analysis is used to extract micro-Doppler signature, based on which an approach is pro...
Spatial motion feature is one of main target features for missile target identification. This paper investigates micro-motion of the missile target. Time-frequency analysis is used to extract micro-Doppler signature, based on which an approach is pro...
2010, 32(8): 1818-1824.
doi: 10.3724/SP.J.1146.2009.00870
Abstract:
The conventional methods for the stepped-frequency high resolution ISAR imaging are usually difficult to accurately estimate the velocity and acceleration of a moving target. Thus, the residual phase error via the motion compensation has a serious ef...
The conventional methods for the stepped-frequency high resolution ISAR imaging are usually difficult to accurately estimate the velocity and acceleration of a moving target. Thus, the residual phase error via the motion compensation has a serious ef...
2010, 32(8): 1825-1830.
doi: 10.3724/SP.J.1146.2009.00835
Abstract:
Estimating targets dimension using High Resolution Range Profile (HRRP) is an important means of character extraction and target recognition of ballistic missile mid-course defense radars. In this paper, a new estimation method of middle-course balli...
Estimating targets dimension using High Resolution Range Profile (HRRP) is an important means of character extraction and target recognition of ballistic missile mid-course defense radars. In this paper, a new estimation method of middle-course balli...
2010, 32(8): 1831-1836.
doi: 10.3724/SP.J.1146.2009.00979
Abstract:
Adaptive space-time coding design is investigated for improving the detection performance of MIMO array radar, with multiple targets and space-time correlation property of clutter RCS considered in this paper. Optimal principle and two suboptimal pri...
Adaptive space-time coding design is investigated for improving the detection performance of MIMO array radar, with multiple targets and space-time correlation property of clutter RCS considered in this paper. Optimal principle and two suboptimal pri...
2010, 32(8): 1837-1842.
doi: 10.3724/SP.J.1146.2009.01080
Abstract:
Wideband radars have higher range resolution than narrowband radars, and the target fluctuation is less. The wideband and narrowband returns of the wideband non-fluctuation target model, the wideband Rayleigh target model and the wideband Ricean targ...
Wideband radars have higher range resolution than narrowband radars, and the target fluctuation is less. The wideband and narrowband returns of the wideband non-fluctuation target model, the wideband Rayleigh target model and the wideband Ricean targ...
2010, 32(8): 1843-1848.
doi: 10.3724/SP.J.1146.2009.01133
Abstract:
A new algorithm to jointly estimate the DOD-DOA and Doppler frequency of bistatic MIMO radar is proposed based on the parallel factor. The receiver signal expression is derived under SweilingII target model, which shows it has three-way array model c...
A new algorithm to jointly estimate the DOD-DOA and Doppler frequency of bistatic MIMO radar is proposed based on the parallel factor. The receiver signal expression is derived under SweilingII target model, which shows it has three-way array model c...
2010, 32(8): 1849-1854.
doi: 10.3724/SP.J.1146.2009.01146
Abstract:
In order to process the multi-channel received data coherently in a convenient way, this paper simplifies MIMO (Multiple-Input Multiple-Output) radar signal model using phase center approximation, firstly. The multiple-transmit multiple-receive array...
In order to process the multi-channel received data coherently in a convenient way, this paper simplifies MIMO (Multiple-Input Multiple-Output) radar signal model using phase center approximation, firstly. The multiple-transmit multiple-receive array...
2010, 32(8): 1855-1862.
doi: 10.3724/SP.J.1146.2009.00706
Abstract:
This paper discusses mainly the image plane of the bistatic ISAR. The image plane is modeled by two different methods separately. One is modeling the image plane according to the bistatic SAR image plane; the other is to model the plane by target rot...
This paper discusses mainly the image plane of the bistatic ISAR. The image plane is modeled by two different methods separately. One is modeling the image plane according to the bistatic SAR image plane; the other is to model the plane by target rot...
2010, 32(8): 1863-1868.
doi: 10.3724/SP.J.1146.2009.01136
Abstract:
In this paper, the GEO spaceborne/airborne multistatic SAR geometry model with one fixed transmitter and multiple receivers is proposed, and the spectrum shift between different receiver echoes is derived. Based on the spectrum shift, a new algorithm...
In this paper, the GEO spaceborne/airborne multistatic SAR geometry model with one fixed transmitter and multiple receivers is proposed, and the spectrum shift between different receiver echoes is derived. Based on the spectrum shift, a new algorithm...
Three-dimensional Spatial-temporal Two-step Dimension-reduced Adaptive Processing for Airborne Radar
2010, 32(8): 1869-1873.
doi: 10.3724/SP.J.1146.2009.01248
Abstract:
Three-dimensional Space-Time Adaptive Processor (3D-STAP) is studied in this paper for airborne radar system, and a new kind of two-step dimension-reduced suboptimum STAP technique is proposed based on the frame of pre-Doppler followed by spatial ada...
Three-dimensional Space-Time Adaptive Processor (3D-STAP) is studied in this paper for airborne radar system, and a new kind of two-step dimension-reduced suboptimum STAP technique is proposed based on the frame of pre-Doppler followed by spatial ada...
2010, 32(8): 1874-1878.
doi: 10.3724/SP.J.1146.2009.00738
Abstract:
To solve the problem of height finding of dual-frequency radar, based on the phase interference theory, the height finding technique of dual-frequency radar is studied. Firstly, the basic principle of phase interference angle measurement is given in ...
To solve the problem of height finding of dual-frequency radar, based on the phase interference theory, the height finding technique of dual-frequency radar is studied. Firstly, the basic principle of phase interference angle measurement is given in ...
2010, 32(8): 1879-1884.
doi: 10.3724/SP.J.1146.2009.00745
Abstract:
Monitoring the weak ocean surface current is one of the most important applications for microwave remote sensing. It is significant for both civil and martial maritime activities. Signal Clutter Ratio (SCR) between ocean surface weak current and wind...
Monitoring the weak ocean surface current is one of the most important applications for microwave remote sensing. It is significant for both civil and martial maritime activities. Signal Clutter Ratio (SCR) between ocean surface weak current and wind...
Star Sensor Attitude Measuring Data Processing Technique in Condition of Complex Satellite Dithering
2010, 32(8): 1885-1891.
doi: 10.3724/SP.J.1146.2009.01079
Abstract:
Because dithering and vibrating exist inevitably while complex satellite running, this will lead to nonsteady and lower precision for star-sensor measurement data and difficult in data processing at low SNR. Therefore, in this paper, the data process...
Because dithering and vibrating exist inevitably while complex satellite running, this will lead to nonsteady and lower precision for star-sensor measurement data and difficult in data processing at low SNR. Therefore, in this paper, the data process...
2010, 32(8): 1892-1897.
doi: 10.3724/SP.J.1146.2009.01048
Abstract:
Link disruption and connection have a considerable impact on satellite networks routing issues. A link disruption tolerant routing strategy is proposed for multilayered satellite networks. In this strategy, the route table is calculated by means of t...
Link disruption and connection have a considerable impact on satellite networks routing issues. A link disruption tolerant routing strategy is proposed for multilayered satellite networks. In this strategy, the route table is calculated by means of t...
2010, 32(8): 1898-1903.
doi: 10.3724/SP.J.1146.2009.01105
Abstract:
A concatenated scheme of Luby Transform (LT) code and q-ary Low Density Parity Check (q-LDPC) code is proposed for the requirement of deep space communications long erasure correcting codes. Considering the performance and complexity of the concatena...
A concatenated scheme of Luby Transform (LT) code and q-ary Low Density Parity Check (q-LDPC) code is proposed for the requirement of deep space communications long erasure correcting codes. Considering the performance and complexity of the concatena...
2010, 32(8): 1904-1909.
doi: 10.3724/SP.J.1146.2009.00464
Abstract:
In order to satisfy the requirement of aerocrafts multi- transmission for further development, this paper leads to a resolution about on-board SpaceWire routing technology. Based on the network level analysis of SpaceWire standard, it built the archi...
In order to satisfy the requirement of aerocrafts multi- transmission for further development, this paper leads to a resolution about on-board SpaceWire routing technology. Based on the network level analysis of SpaceWire standard, it built the archi...
2010, 32(8): 1910-1913.
doi: 10.3724/SP.J.1146.2009.01188
Abstract:
In this paper, a sub-optimal transmission technique is proposed for uplink MU-MIMO systems, which is called Maximum Eigenmode BeamForming (MEBF). Compared with the optimal transmission technique (i.e., Multi-User Iterative Water-Filling, MU-IWF), the...
In this paper, a sub-optimal transmission technique is proposed for uplink MU-MIMO systems, which is called Maximum Eigenmode BeamForming (MEBF). Compared with the optimal transmission technique (i.e., Multi-User Iterative Water-Filling, MU-IWF), the...
2010, 32(8): 1914-1919.
doi: 10.3724/SP.J.1146.2009.01182
Abstract:
A segmented maximum likelihood iterative detection algorithm is proposed for distributed space- frequency coded cooperative communication system with multiple relay nodes over frequency-selective fading channels. The destination node divides each dis...
A segmented maximum likelihood iterative detection algorithm is proposed for distributed space- frequency coded cooperative communication system with multiple relay nodes over frequency-selective fading channels. The destination node divides each dis...
2010, 32(8): 1920-1925.
doi: 10.3724/SP.J.1146.2009.01316
Abstract:
In this article, a relay selection and power allocation strategy based on buyer-seller game is proposed for Decode-and-Forward (DF) cooperative relay network. The user is modeled as a buyer which selects the optimal relay and determines the optimal a...
In this article, a relay selection and power allocation strategy based on buyer-seller game is proposed for Decode-and-Forward (DF) cooperative relay network. The user is modeled as a buyer which selects the optimal relay and determines the optimal a...
2010, 32(8): 1926-1931.
doi: 10.3724/SP.J.1146.2009.01089
Abstract:
考虑一对多天线的信源信宿通过一个单天线的放大前传(AF)中继辅助通信的两跳半双工无线网络。假设通信终端完全获知信道状态信息(CSI)。该文提出了该中继系统的最优波束成型方案，然后对采用此方案时的系统接收信噪比作高SNR下的统计特性分析，推导出瑞利平衰落信道下系统的遍历容量上界和平均误符号率(ASEP)的闭合表达式，并得出相应的分集度和阵列增益。理论分析结果显示了系统性能与天线数和发射功率的确切关系，并且在高SNR时不同的调制方式不影响分集度，只改变阵列增益。蒙特卡罗(Monte Carlo)数值...
考虑一对多天线的信源信宿通过一个单天线的放大前传(AF)中继辅助通信的两跳半双工无线网络。假设通信终端完全获知信道状态信息(CSI)。该文提出了该中继系统的最优波束成型方案，然后对采用此方案时的系统接收信噪比作高SNR下的统计特性分析，推导出瑞利平衰落信道下系统的遍历容量上界和平均误符号率(ASEP)的闭合表达式，并得出相应的分集度和阵列增益。理论分析结果显示了系统性能与天线数和发射功率的确切关系，并且在高SNR时不同的调制方式不影响分集度，只改变阵列增益。蒙特卡罗(Monte Carlo)数值...
2010, 32(8): 1932-1937.
doi: 10.3724/SP.J.1146.2009.00728
Abstract:
This paper studies the network throughput capacity gain of Physical-layer Network Coding (PNC) in data-gathering wireless ad hoc networks. The throughput upper bound and lower bound with the PNC scheme are derived by utilizing the sparsity-cut capaci...
This paper studies the network throughput capacity gain of Physical-layer Network Coding (PNC) in data-gathering wireless ad hoc networks. The throughput upper bound and lower bound with the PNC scheme are derived by utilizing the sparsity-cut capaci...
2010, 32(8): 1938-1942.
doi: 10.3724/SP.J.1146.2009.00814
Abstract:
In order to determine the sending time for the mobile station, a novel synchronous control mechanism for the uplink in the LTE TDD system is proposed in this paper. Firstly, the principle of synchronous control is introduced. Secondly, according to t...
In order to determine the sending time for the mobile station, a novel synchronous control mechanism for the uplink in the LTE TDD system is proposed in this paper. Firstly, the principle of synchronous control is introduced. Secondly, according to t...
2010, 32(8): 1943-1947.
doi: 10.3724/SP.J.1146.2009.00665
Abstract:
The spread-spectrum system usually works in the multipath environment, along with the additive noise there always be some multiplicative noise. In order to solve the Pseudo-Noise (PN) code acquisition in multiplicative noise channel, a new detector u...
The spread-spectrum system usually works in the multipath environment, along with the additive noise there always be some multiplicative noise. In order to solve the Pseudo-Noise (PN) code acquisition in multiplicative noise channel, a new detector u...
2010, 32(8): 1948-1952.
doi: 10.3724/SP.J.1146.2009.00824
Abstract:
Many existing three Party Password-Authenticated Key Exchange (3PAKE) protocols are found insecure. An ideal functionality of 3PAKE is defined in the universal composability model，and a 3PAKE protocol is constructed to realize the 3PAKE ideal functio...
Many existing three Party Password-Authenticated Key Exchange (3PAKE) protocols are found insecure. An ideal functionality of 3PAKE is defined in the universal composability model，and a 3PAKE protocol is constructed to realize the 3PAKE ideal functio...
2010, 32(8): 1953-1955.
doi: 10.3724/SP.J.1146.2009.01313
Abstract:
This paper constructs a diamond structure multicollision with2k initial values and variant lengths, which is used to propose a new chosen target forced prefix preimage attack (herding attack) on hash functions with Strengthening Merkle-Damagard (SMD)...
This paper constructs a diamond structure multicollision with2k initial values and variant lengths, which is used to propose a new chosen target forced prefix preimage attack (herding attack) on hash functions with Strengthening Merkle-Damagard (SMD)...
2010, 32(8): 1956-1960.
doi: 10.3724/SP.J.1146.2009.01160
Abstract:
As layered algorithm can not be used in the decoding of the non-layered LDPC codes, a Parallel- Layered Belief-Propagation (PLBP) algorithm is proposed in this paper. The decoding of this algorithm is quite different from the original layered algorit...
As layered algorithm can not be used in the decoding of the non-layered LDPC codes, a Parallel- Layered Belief-Propagation (PLBP) algorithm is proposed in this paper. The decoding of this algorithm is quite different from the original layered algorit...
2010, 32(8): 1961-1967.
doi: 10.3724/SP.J.1146.2009.01038
Abstract:
Secure Wireless Roaming (SWR) allows a roaming user under the subscription of its home server to establish a secure session key with a foreign server in an authenticated way such that both the foreign server and the roaming user can mutually authenti...
Secure Wireless Roaming (SWR) allows a roaming user under the subscription of its home server to establish a secure session key with a foreign server in an authenticated way such that both the foreign server and the roaming user can mutually authenti...
2010, 32(8): 1968-1973.
doi: 10.3724/SP.J.1146.2009.00725
Abstract:
In order to estimate energy overhead of sensor nodes, it is necessary to model their power consumption reasonably and accurately. However, existing power models are not accurate enough. This paper proposes a novel power model based on power state mac...
In order to estimate energy overhead of sensor nodes, it is necessary to model their power consumption reasonably and accurately. However, existing power models are not accurate enough. This paper proposes a novel power model based on power state mac...
2010, 32(8): 1974-1979.
doi: 10.3724/SP.J.1146.2009.01147
Abstract:
Focusing on the energy consumption and the network delay in wireless sensor network applied to emergent event monitoring, a new Data Gathering algorithm based on Mobile Agent (DGMA) is proposed for the chain-based wireless sensor network. The process...
Focusing on the energy consumption and the network delay in wireless sensor network applied to emergent event monitoring, a new Data Gathering algorithm based on Mobile Agent (DGMA) is proposed for the chain-based wireless sensor network. The process...
2010, 32(8): 1980-1985.
doi: 10.3724/SP.J.1146.2009.01608
Abstract:
As a result of the research and design of Reconfiguration Router Unit (RRU), the producing of network equipment is turned into component composition as building block. Based on the component composition,the character of RRU, and situation that the th...
As a result of the research and design of Reconfiguration Router Unit (RRU), the producing of network equipment is turned into component composition as building block. Based on the component composition,the character of RRU, and situation that the th...
2010, 32(8): 1986-1991.
doi: 10.3724/SP.J.1146.2009.00953
Abstract:
This paper devotes to modeling and the stability study of a Ka-band TE01 mode gyrotron Traveling-Wave Tube (gyro-TWT) based on a modal selective circuit alternately loaded with lossy ceramic shells and metal rings. The linear theory and the self-cons...
This paper devotes to modeling and the stability study of a Ka-band TE01 mode gyrotron Traveling-Wave Tube (gyro-TWT) based on a modal selective circuit alternately loaded with lossy ceramic shells and metal rings. The linear theory and the self-cons...
2010, 32(8): 1992-1996.
doi: 10.3724/SP.J.1146.2009.00796
Abstract:
The space-frequency processing of sub-apertures that obtained from the single-antenna airborne SAR is proposed for the moving target detection. First the process of how to gain the sub-apertures is presented through the azimuth frequency processing. ...
The space-frequency processing of sub-apertures that obtained from the single-antenna airborne SAR is proposed for the moving target detection. First the process of how to gain the sub-apertures is presented through the azimuth frequency processing. ...
2010, 32(8): 1997-2001.
doi: 10.3724/SP.J.1146.2009.00937
Abstract:
Multi-input multi-output spaceborne SAR transmits orthogonal coding signals with multiple antennas from different transmitting phase centers, and receives returns from different receiving phase centers to form multi-channel signals. It can increase t...
Multi-input multi-output spaceborne SAR transmits orthogonal coding signals with multiple antennas from different transmitting phase centers, and receives returns from different receiving phase centers to form multi-channel signals. It can increase t...
2010, 32(8): 2002-2005.
doi: 10.3724/SP.J.1146.2009.01535
Abstract:
Schumann Resonance (SR) is closely related with atmospheric temperature changes and electromagnetic precursors of earthquakes. In this paper, a new method to monitor SR is proposed as the heavy environment constraints in the ground-based observing. T...
Schumann Resonance (SR) is closely related with atmospheric temperature changes and electromagnetic precursors of earthquakes. In this paper, a new method to monitor SR is proposed as the heavy environment constraints in the ground-based observing. T...
2010, 32(8): 2006-2009.
doi: 10.3724/SP.J.1146.2009.01072
Abstract:
To improve the precision of Speaker Segmentation (SS), this paper propose a two-step SS algorithm by making use of silence and gender information. Two-step criterion is used to decide the Speaker Change Point (SCP) within detected speech segmentation...
To improve the precision of Speaker Segmentation (SS), this paper propose a two-step SS algorithm by making use of silence and gender information. Two-step criterion is used to decide the Speaker Change Point (SCP) within detected speech segmentation...
2010, 32(8): 2010-2014.
doi: 10.3724/SP.J.1146.2009.00828
Abstract:
A space-time and multi-path diversity combining algorithm is presented in STBC block transmission system with two transmit antennas and one receive antenna. The primary detection is carried out by STBC-based Single Carrier Frequency Domain Equalizer ...
A space-time and multi-path diversity combining algorithm is presented in STBC block transmission system with two transmit antennas and one receive antenna. The primary detection is carried out by STBC-based Single Carrier Frequency Domain Equalizer ...
2010, 32(8): 2015-2018.
doi: 10.3724/SP.J.1146.2009.01071
Abstract:
The diffusion property of image encryption algorithms in block-and-permutation mode is investigated, where two new conceptions, the optimal diffusion and collision-free permutation are put forward. An image encryption algorithm in block-and-permutati...
The diffusion property of image encryption algorithms in block-and-permutation mode is investigated, where two new conceptions, the optimal diffusion and collision-free permutation are put forward. An image encryption algorithm in block-and-permutati...
2010, 32(8): 2019-2022.
doi: 10.3724/SP.J.1146.2009.01401
Abstract:
The fast matrix solving is the key of the moment method when computing the electrically large issues. LU decomposition is a efficient algorithm for solving linear equations. In this paper, Doolittle LU Decomposition is described detailedly. Based on ...
The fast matrix solving is the key of the moment method when computing the electrically large issues. LU decomposition is a efficient algorithm for solving linear equations. In this paper, Doolittle LU Decomposition is described detailedly. Based on ...
2010, 32(8): 2023-2027.
doi: 10.3724/SP.J.1146.2009.01007
Abstract:
Single-driver directional wires and multi-driver directional wires can both be used for FPGA interconnect. This paper compares them in area, performance, and their effect on topology of the routing architecture. Then a new type of FPGA routing archit...
Single-driver directional wires and multi-driver directional wires can both be used for FPGA interconnect. This paper compares them in area, performance, and their effect on topology of the routing architecture. Then a new type of FPGA routing archit...
2010, 32(8): 2028-2032.
doi: 10.3724/SP.J.1146.2009.01016
Abstract:
A monolithic SiGe Heterojunction Bipolar Transistor (HBT) Low Noise Amplifier (LNA) is designed and fabricated in this paper. Composite resistance feedback loops are adopted in this amplifier. Hence, reasonable bias conditions, good port matching and...
A monolithic SiGe Heterojunction Bipolar Transistor (HBT) Low Noise Amplifier (LNA) is designed and fabricated in this paper. Composite resistance feedback loops are adopted in this amplifier. Hence, reasonable bias conditions, good port matching and...
