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2010 Vol. 32, No. 9
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2010, 32(9): 2033-2038.
doi: 10.3724/SP.J.1146.2009.01149
Abstract:
Based on the large-scale path loss model for wireless communications, a Vehicular Ad hoc NETwork (VANET) in highway scenarios is modeled as a geometric random graph, the concept of effective networking area in VANET is proposed, the quasi-linear topo...
Based on the large-scale path loss model for wireless communications, a Vehicular Ad hoc NETwork (VANET) in highway scenarios is modeled as a geometric random graph, the concept of effective networking area in VANET is proposed, the quasi-linear topo...
2010, 32(9): 2039-2044.
doi: 10.3724/SP.J.1146.2009.01271
Abstract:
Wireless Multimedia Sensor Networks (WMSNs) can real-time monitor, collect and process multimedia information. They have wide applications. Compared to other traditional sensor networks, WMSNs need more bandwidth to transmit multimedia information. H...
Wireless Multimedia Sensor Networks (WMSNs) can real-time monitor, collect and process multimedia information. They have wide applications. Compared to other traditional sensor networks, WMSNs need more bandwidth to transmit multimedia information. H...
2010, 32(9): 2045-2051.
doi: 10.3724/SP.J.1146.2009.01234
Abstract:
This paper analyzes convergence and acceleration issues of distributed consensus time synchronization protocols in wireless sensor networks. By mapping synchronization iterations to Markov domain, the upper and lower bounds of protocol convergence ra...
This paper analyzes convergence and acceleration issues of distributed consensus time synchronization protocols in wireless sensor networks. By mapping synchronization iterations to Markov domain, the upper and lower bounds of protocol convergence ra...
2010, 32(9): 2052-2057.
doi: 10.3724/SP.J.1146.2009.01640
Abstract:
The research focus of this paper is to design a novel target tracking algorithm for binary sensor network (BSN). The weight in existing algorithms can not reflect the realtime relationship between target and sensing nodes. Distance weighted target tr...
The research focus of this paper is to design a novel target tracking algorithm for binary sensor network (BSN). The weight in existing algorithms can not reflect the realtime relationship between target and sensing nodes. Distance weighted target tr...
2010, 32(9): 2058-2064.
doi: 10.3724/SP.J.1146.2009.01228
Abstract:
As a congestion measure, queuing delay has many advantages. But packet loss can not be completely avoided if only queuing delay is used as a congestion measure. When the buffer is not large enough and some packets are dropped, queuing delay can not a...
As a congestion measure, queuing delay has many advantages. But packet loss can not be completely avoided if only queuing delay is used as a congestion measure. When the buffer is not large enough and some packets are dropped, queuing delay can not a...
2010, 32(9): 2065-2071.
doi: 10.3724/SP.J.1146.2009.01054
Abstract:
Reliable multicast in Ad hoc networks is challenging due to high error rate, low bandwidth, limited node power, and highly dynamic topology changes. In this paper, an efficient loss recovery scheme is proposed for reliable multicast (CoreRM). The bas...
Reliable multicast in Ad hoc networks is challenging due to high error rate, low bandwidth, limited node power, and highly dynamic topology changes. In this paper, an efficient loss recovery scheme is proposed for reliable multicast (CoreRM). The bas...
2010, 32(9): 2072-2076.
doi: 10.3724/SP.J.1146.2009.01440
Abstract:
In the LEO satellite spectrum sensing, choosing a proper frequency resolution for detecting the energy is very crucial. A too high resolution fails to detect spectrum holes which probably exist, while a too low one adds the computation and misjudges ...
In the LEO satellite spectrum sensing, choosing a proper frequency resolution for detecting the energy is very crucial. A too high resolution fails to detect spectrum holes which probably exist, while a too low one adds the computation and misjudges ...
2010, 32(9): 2077-2082.
doi: 10.3724/SP.J.1146.2010.00004
Abstract:
In order to improve the sum-rate of Two-way relay system, this paper proposes a Bi-directional Relay Selection (BRS) scheme in Two-way AF relay system. This scheme selects the optimal relay through joint considering the receive SNR (Signal Noise Rate...
In order to improve the sum-rate of Two-way relay system, this paper proposes a Bi-directional Relay Selection (BRS) scheme in Two-way AF relay system. This scheme selects the optimal relay through joint considering the receive SNR (Signal Noise Rate...
2010, 32(9): 2083-2088.
doi: 10.3724/SP.J.1146.2009.01158
Abstract:
A novel hybrid communications system, i.e., coherent Frequency-Hopping CDMA (FH/CDMA) system with Maximum Rate Combining (MRC) diversity reception and multicarrier scheme, is analyzed in Rayleigh fading channel. Due to the introduction of phase modul...
A novel hybrid communications system, i.e., coherent Frequency-Hopping CDMA (FH/CDMA) system with Maximum Rate Combining (MRC) diversity reception and multicarrier scheme, is analyzed in Rayleigh fading channel. Due to the introduction of phase modul...
2010, 32(9): 2089-2094.
doi: 10.3724/SP.J.1146.2009.01292
Abstract:
The analysis and research are based on the existing Farrow structure of Lagrange interpolation filter. The pipelining and parallel processing technology are used to improve the speed of filter. On this basis, a new structure based on the fast FIR alg...
The analysis and research are based on the existing Farrow structure of Lagrange interpolation filter. The pipelining and parallel processing technology are used to improve the speed of filter. On this basis, a new structure based on the fast FIR alg...
Dual-field Modular Multiplication Algorithm and Modular Inversion Algorithm with VLSI Implementation
2010, 32(9): 2095-2100.
doi: 10.3724/SP.J.1146.2009.01258
Abstract:
Modular multiplication and modular inversion algorithms are the kernel of elliptic curve cryptography. In this paper, a radix-4 dual-filed modular multiplication algorithm which is based on Blakelys algorithm is proposed. Booths algorithm is used to ...
Modular multiplication and modular inversion algorithms are the kernel of elliptic curve cryptography. In this paper, a radix-4 dual-filed modular multiplication algorithm which is based on Blakelys algorithm is proposed. Booths algorithm is used to ...
2010, 32(9): 2101-2105.
doi: 10.3724/SP.J.1146.2009.01325
Abstract:
Cyclic codes over the ringR=Fpm+uFpm can be seen as the ideals of R[x]/xpk-1. Based on the studing of ideals of R[x]/xpk-1, a unique method of representing cyclic codes of lengthpk and their mass formulas over the ringFpm+uFpm are provided. For the c...
Cyclic codes over the ringR=Fpm+uFpm can be seen as the ideals of R[x]/xpk-1. Based on the studing of ideals of R[x]/xpk-1, a unique method of representing cyclic codes of lengthpk and their mass formulas over the ringFpm+uFpm are provided. For the c...
2010, 32(9): 2106-2111.
doi: 10.3724/SP.J.1146.2009.01191
Abstract:
IEEE 802.16e-2005 standards PKMv2 protocol is an important secure guarantee for WiMAX (Worldwide Interoperability for Microwave Access) wireless network. In this paper, based on Protocol Composition Logic (PCL), the PKMv2 authentication protocols sec...
IEEE 802.16e-2005 standards PKMv2 protocol is an important secure guarantee for WiMAX (Worldwide Interoperability for Microwave Access) wireless network. In this paper, based on Protocol Composition Logic (PCL), the PKMv2 authentication protocols sec...
2010, 32(9): 2112-2118.
doi: 10.3724/SP.J.1146.2009.01197
Abstract:
The Cardinalized Probability Hypothesis Density (CPHD) fiter is a recursive Bayesian algorithm for estimating multiple target states with varying target number in clutter. Due to the fact that there is a missed detection problem in the CPHD filter, a...
The Cardinalized Probability Hypothesis Density (CPHD) fiter is a recursive Bayesian algorithm for estimating multiple target states with varying target number in clutter. Due to the fact that there is a missed detection problem in the CPHD filter, a...
2010, 32(9): 2119-2125.
doi: 10.3724/SP.J.1146.2009.01245
Abstract:
Small scale target tracking is one of the primary difficulties in visual tracking. Two major problems in mean shift small target tracking algorithm are presented in this paper, namely tracking interrupt and target losing. To tackle these problems, th...
Small scale target tracking is one of the primary difficulties in visual tracking. Two major problems in mean shift small target tracking algorithm are presented in this paper, namely tracking interrupt and target losing. To tackle these problems, th...
2010, 32(9): 2126-2132.
doi: 10.3724/SP.J.1146.2009.01129
Abstract:
Geometric active contour is used as a powerful tool to address image segmentation problems. Recently, a new region-based active contour model based on pairwise similarity between pixels, i.e., Graph Portioning Active Contours (GPAC) is presented, and...
Geometric active contour is used as a powerful tool to address image segmentation problems. Recently, a new region-based active contour model based on pairwise similarity between pixels, i.e., Graph Portioning Active Contours (GPAC) is presented, and...
Accelerate the Filtering Process of Filtered Back Projection Algorithm Using Fast Hadamard Transform
2010, 32(9): 2133-2138.
doi: 10.3724/SP.J.1146.2009.01635
Abstract:
To speedup the filtering process of the Filtered Back Projection (FBP) algorithm, a fast linear convolution algorithm using Fast Hadamard Transform (FHT) is proposed. The characteristic of Hadamard transform and its time complexity is analyzed. The m...
To speedup the filtering process of the Filtered Back Projection (FBP) algorithm, a fast linear convolution algorithm using Fast Hadamard Transform (FHT) is proposed. The characteristic of Hadamard transform and its time complexity is analyzed. The m...
2010, 32(9): 2139-2144.
doi: 10.3724/SP.J.1146.2009.01323
Abstract:
This paper describes a novel optimization framework for visual codebook generation. Firstly, the Condition Number (CN) is applied to evaluate the stability of initial visual features, and the well conditioned features are preserved by eliminating the...
This paper describes a novel optimization framework for visual codebook generation. Firstly, the Condition Number (CN) is applied to evaluate the stability of initial visual features, and the well conditioned features are preserved by eliminating the...
2010, 32(9): 2145-2150.
doi: 10.3724/SP.J.1146.2009.01505
Abstract:
To implement fault detection under large-scale, strong dynamic, high reliability required network environments, the traditional fault message dissemination would encounter network congestion, latency instability etc.. A fault detection protocol based...
To implement fault detection under large-scale, strong dynamic, high reliability required network environments, the traditional fault message dissemination would encounter network congestion, latency instability etc.. A fault detection protocol based...
2010, 32(9): 2151-2155.
doi: 10.3724/SP.J.1146.2009.01346
Abstract:
In order to improve recovery accuracy for compressed sensing, a Stagewise Weak selection Modifying approximation Conjugate Gradient Pursuit (StWMCGP) algorithm is proposed in this paper. This algorithm modifies the direction in the directional pursui...
In order to improve recovery accuracy for compressed sensing, a Stagewise Weak selection Modifying approximation Conjugate Gradient Pursuit (StWMCGP) algorithm is proposed in this paper. This algorithm modifies the direction in the directional pursui...
2010, 32(9): 2156-2160.
doi: 10.3724/SP.J.1146.2009.01364
Abstract:
The precise passive locating and tracking technology for a single observer demands high accuracy estimation of Doppler frequency rate produced by the radial acceleration between the target and the observer from the received signals. The frequency rat...
The precise passive locating and tracking technology for a single observer demands high accuracy estimation of Doppler frequency rate produced by the radial acceleration between the target and the observer from the received signals. The frequency rat...
2010, 32(9): 2161-2166.
doi: 10.3724/SP.J.1146.2009.01204
Abstract:
Due to the density model selection problem of amplitudes in each range cells for radar target recognition using High-Resolution Range Profile (HRRP), a radar target recognition approach based on the semiparametric density estimation is proposed in th...
Due to the density model selection problem of amplitudes in each range cells for radar target recognition using High-Resolution Range Profile (HRRP), a radar target recognition approach based on the semiparametric density estimation is proposed in th...
2010, 32(9): 2167-2171.
doi: 10.3724/SP.J.1146.2009.01329
Abstract:
This paper presents a novel method for target localization and Doppler frequency estimation in bistatic MIMO radar. By utilizing the biorthogonality of matrices, a reasonable cost function is constructed. Via iteratively solving the cost function and...
This paper presents a novel method for target localization and Doppler frequency estimation in bistatic MIMO radar. By utilizing the biorthogonality of matrices, a reasonable cost function is constructed. Via iteratively solving the cost function and...
2010, 32(9): 2172-2178.
doi: 10.3724/SP.J.1146.2009.01102
Abstract:
In this paper, an approach, based on sub-band synthesis and general facet model, is proposed for Ultra- WideBand (UWB) radar ground clutter modeling, simulation and analysis of clutter statistics in the case of different incident angle and relative b...
In this paper, an approach, based on sub-band synthesis and general facet model, is proposed for Ultra- WideBand (UWB) radar ground clutter modeling, simulation and analysis of clutter statistics in the case of different incident angle and relative b...
2010, 32(9): 2179-2183.
doi: 10.3724/SP.J.1146.2009.01459
Abstract:
An algorithm combined MUSIC with ESPRIT for angle estimation based on two- or four-order statistics in bistatic MIMO radar system is presented in this paper. The proposed method based on two-order expectation is under the spatial Gaussian white noise...
An algorithm combined MUSIC with ESPRIT for angle estimation based on two- or four-order statistics in bistatic MIMO radar system is presented in this paper. The proposed method based on two-order expectation is under the spatial Gaussian white noise...
2010, 32(9): 2184-2190.
doi: 10.3724/SP.J.1146.2009.01274
Abstract:
To eliminate the azimuthal spectral folding of spotlight Synthetic Aperture Radar (SAR) and the serious coupling between range and azimuth in high squint mode, an algorithm based on azimuth deramp and Nonlinear Frequency Scaling (NFS) is proposed. Fi...
To eliminate the azimuthal spectral folding of spotlight Synthetic Aperture Radar (SAR) and the serious coupling between range and azimuth in high squint mode, an algorithm based on azimuth deramp and Nonlinear Frequency Scaling (NFS) is proposed. Fi...
2010, 32(9): 2191-2196.
doi: 10.3724/SP.J.1146.2009.01233
Abstract:
The Forward Scattering Radar (FSR) can obtain moving target profile image with the technology of Shadow Inverse Synthetic Aperture Radar (SISAR), which can be used as target classification and identification. In order to research the effect of multi-...
The Forward Scattering Radar (FSR) can obtain moving target profile image with the technology of Shadow Inverse Synthetic Aperture Radar (SISAR), which can be used as target classification and identification. In order to research the effect of multi-...
2010, 32(9): 2197-2200.
doi: 10.3724/SP.J.1146.2010.00151
Abstract:
A method for multi-target localization based on polynomial rooting is developed in bistatic MIMO radar. Utilizing the property of transmit-receive steering vector, the two-dimensional (2-D) direction finding is transformed into two 1-D direction find...
A method for multi-target localization based on polynomial rooting is developed in bistatic MIMO radar. Utilizing the property of transmit-receive steering vector, the two-dimensional (2-D) direction finding is transformed into two 1-D direction find...
2010, 32(9): 2201-2207.
doi: 10.3724/SP.J.1146.2009.01218
Abstract:
According to the performance loss of moving target detection for a multi-channel SAR/GMTI system caused by the heterogeneous clutter environments, this paper proposes a new improved FRACTA algorithm. It arises from the improvements of the FARCTA algo...
According to the performance loss of moving target detection for a multi-channel SAR/GMTI system caused by the heterogeneous clutter environments, this paper proposes a new improved FRACTA algorithm. It arises from the improvements of the FARCTA algo...
2010, 32(9): 2208-2214.
doi: 10.3724/SP.J.1146.2009.01162
Abstract:
In order to improve the speed of interferometric processing for the airborne dual-antenna interferometric Synthetic Aperture Radar (SAR) system and also remain the accuracy of the registration, the non-linear approximation in the range Extended Chirp...
In order to improve the speed of interferometric processing for the airborne dual-antenna interferometric Synthetic Aperture Radar (SAR) system and also remain the accuracy of the registration, the non-linear approximation in the range Extended Chirp...
2010, 32(9): 2215-2219.
doi: 10.3724/SP.J.1146.2009.01426
Abstract:
Water shows low gray level and small wave from remote sensing images. As the fastest segmentation algorithm, 1D Otsu is used for Synthetic Aperture Radar (SAR) image segmentation. Level relation between multilevel Otsu and recursive Otsu is proved, a...
Water shows low gray level and small wave from remote sensing images. As the fastest segmentation algorithm, 1D Otsu is used for Synthetic Aperture Radar (SAR) image segmentation. Level relation between multilevel Otsu and recursive Otsu is proved, a...
2010, 32(9): 2220-2225.
doi: 10.3724/SP.J.1146.2009.01278
Abstract:
The improved Ambiguity Function Method (AFM) method of intersection point on sphere is an effective algorithm for attitude determination using GPS signal, but the success rate is influenced by observation noise significantly. To deal this problem, in...
The improved Ambiguity Function Method (AFM) method of intersection point on sphere is an effective algorithm for attitude determination using GPS signal, but the success rate is influenced by observation noise significantly. To deal this problem, in...
2010, 32(9): 2226-2230.
doi: 10.3724/SP.J.1146.2009.01212
Abstract:
An H-shaped conformal microstrip antenna array mounted on an irregular curved surface is optimized and designed in this paper and the radiation pattern of this conformal array is synthesized using the Self-adaptive Hybrid Genetic Algorithms (SHGA). T...
An H-shaped conformal microstrip antenna array mounted on an irregular curved surface is optimized and designed in this paper and the radiation pattern of this conformal array is synthesized using the Self-adaptive Hybrid Genetic Algorithms (SHGA). T...
2010, 32(9): 2231-2235.
doi: 10.3724/SP.J.1146.2009.01249
Abstract:
Power control techniques for wireless sensor networks are significant for network connectivity, energy efficiency, network capacity, throughput, real time performance and etc. It is one of the supporting technologies for the deployment of wireless se...
Power control techniques for wireless sensor networks are significant for network connectivity, energy efficiency, network capacity, throughput, real time performance and etc. It is one of the supporting technologies for the deployment of wireless se...
2010, 32(9): 2236-2240.
doi: 10.3724/SP.J.1146.2009.01326
Abstract:
For the limited processing, storage and energy of network nodes in the wireless sensor network environment, a distributed JPEG2000 coding algorithm based on mobile agent is proposed. Multiple network nodes are utilized to the image distributed coding...
For the limited processing, storage and energy of network nodes in the wireless sensor network environment, a distributed JPEG2000 coding algorithm based on mobile agent is proposed. Multiple network nodes are utilized to the image distributed coding...
2010, 32(9): 2241-2244.
doi: 10.3724/SP.J.1146.2009.01265
Abstract:
Because of the characteristics of Ad hoc networks, the theory of strand spaces can not analyzes the security of routing protocol. In this paper, the theory of strand spaces is first extended and the credibility of intermediate node is added. Subseque...
Because of the characteristics of Ad hoc networks, the theory of strand spaces can not analyzes the security of routing protocol. In this paper, the theory of strand spaces is first extended and the credibility of intermediate node is added. Subseque...
2010, 32(9): 2245-2248.
doi: 10.3724/SP.J.1146.2010.00225
Abstract:
With development of computer technology, especially Internet technology, people are faced with the invasion brought about a series of security problems. Employing game theory into a mobile Ad hoc network Intrusion Detection System (IDS) is presented ...
With development of computer technology, especially Internet technology, people are faced with the invasion brought about a series of security problems. Employing game theory into a mobile Ad hoc network Intrusion Detection System (IDS) is presented ...
2010, 32(9): 2249-2252.
doi: 10.3724/SP.J.1146.2009.01260
Abstract:
Certificateless signcryption key encapsulation mechanism (CLSC-KEM), combined with a data encapsulation mechanism, is used to construct certificateless hybrid signcryption . This paper introduces a new concept: certificateless signcryption KEM to mul...
Certificateless signcryption key encapsulation mechanism (CLSC-KEM), combined with a data encapsulation mechanism, is used to construct certificateless hybrid signcryption . This paper introduces a new concept: certificateless signcryption KEM to mul...
2010, 32(9): 2253-2257.
doi: 10.3724/SP.J.1146.2010.00145
Abstract:
Only the angle information of the targets can be obtained by infrared single-station. It is hard to get the distance information, which makes it impossible to track 3D objects in rectangular coordinates. A new algorithm is proposed for estimating the...
Only the angle information of the targets can be obtained by infrared single-station. It is hard to get the distance information, which makes it impossible to track 3D objects in rectangular coordinates. A new algorithm is proposed for estimating the...
2010, 32(9): 2258-2262.
doi: 10.3724/SP.J.1146.2009.01135
Abstract:
The anechoic chamber experiment is carried out to prove that in practical condition the thinned array aperture synthesis method can avoid the thinned array high sidelob, and the imaging algorithm based on compressed sensing theory can reconstruct the...
The anechoic chamber experiment is carried out to prove that in practical condition the thinned array aperture synthesis method can avoid the thinned array high sidelob, and the imaging algorithm based on compressed sensing theory can reconstruct the...
2010, 32(9): 2263-2267.
doi: 10.3724/SP.J.1146.2009.01256
Abstract:
In consideration of the the issue of the weakness performance of Compressive Sensing (CS) ISAR imaging under low SNR condition, an improved CS method is proposed in this paper. Energy based threshold is proposed to identify range cells containing onl...
In consideration of the the issue of the weakness performance of Compressive Sensing (CS) ISAR imaging under low SNR condition, an improved CS method is proposed in this paper. Energy based threshold is proposed to identify range cells containing onl...
2010, 32(9): 2268-2272.
doi: 10.3724/SP.J.1146.2009.01101
Abstract:
Raw data compression is an important step for high resolution SAR systems. This paper bases on two data compression methods, the 4 bit quantization and the 8 to 3 bit Block Adaptive Quantization (BAQ), which are widely used in spaceborne SAR, the eva...
Raw data compression is an important step for high resolution SAR systems. This paper bases on two data compression methods, the 4 bit quantization and the 8 to 3 bit Block Adaptive Quantization (BAQ), which are widely used in spaceborne SAR, the eva...
An Efficient Time Delay Estimation Algorithm for Multipath Signal of Distance Signal in TACAN System
2010, 32(9): 2273-2276.
doi: 10.3724/SP.J.1146.2009.01187
Abstract:
Based of known waveform, known period and concentrated energy of distance signal in TACAN system , an efficient time delay estimation algorithm for multipath signal of distance signal is presented in this paper, according to the former frequency spec...
Based of known waveform, known period and concentrated energy of distance signal in TACAN system , an efficient time delay estimation algorithm for multipath signal of distance signal is presented in this paper, according to the former frequency spec...
2010, 32(9): 2277-2281.
doi: 10.3724/SP.J.1146.2009.01242
Abstract:
For the issue of thinned array synthesis, an optimized design method of genetic algorithm based on integer code is proposed. By the application of individual description manner using integer coding, the search space is greatly reduced on the premise ...
For the issue of thinned array synthesis, an optimized design method of genetic algorithm based on integer code is proposed. By the application of individual description manner using integer coding, the search space is greatly reduced on the premise ...
2010, 32(9): 2282-2286.
doi: 10.3724/SP.J.1146.2009.01021
Abstract:
Conventional filters always suffer from the interference of its spurious bands, which leads to poor stopband in high frequency range. With the development of ultra-wide band radar system and ultra-wide band communication system, filters with minitype...
Conventional filters always suffer from the interference of its spurious bands, which leads to poor stopband in high frequency range. With the development of ultra-wide band radar system and ultra-wide band communication system, filters with minitype...
