Email alert
2008 Vol. 30, No. 9
Display Method:
2008, 30(9): 2033-2037.
doi: 10.3724/SP.J.1146.2007.01509
Abstract:
A Frequency Divided Multiple Input Multiple Output (FD-MIMO) radar is proposed, which can synthesize the High Range Resolution Profile (HRRP) by transmitting and receiving narrowband waveforms in different frequency bands without over-demanding syste...
A Frequency Divided Multiple Input Multiple Output (FD-MIMO) radar is proposed, which can synthesize the High Range Resolution Profile (HRRP) by transmitting and receiving narrowband waveforms in different frequency bands without over-demanding syste...
2008, 30(9): 2038-2041.
doi: 10.3724/SP.J.1146.2007.01478
Abstract:
A novel method based on phase modulated signal is proposed in this paper in order to solve the transmit-receiver waveform design issue. Using the characteristics of phased modulated signal, higher output Signal to Interference plus Noise Ratio (SINR)...
A novel method based on phase modulated signal is proposed in this paper in order to solve the transmit-receiver waveform design issue. Using the characteristics of phased modulated signal, higher output Signal to Interference plus Noise Ratio (SINR)...
2008, 30(9): 2042-2045.
doi: 10.3724/SP.J.1146.2007.00853
Abstract:
In this paper, the Positive Alpha Stable (PS)distribution is introduced to identify four traditional kinds of radar clutter, such as Rayleigh, Weibull, Log-normal and K. The tail distributions of various clutters are represented with PS parameterizat...
In this paper, the Positive Alpha Stable (PS)distribution is introduced to identify four traditional kinds of radar clutter, such as Rayleigh, Weibull, Log-normal and K. The tail distributions of various clutters are represented with PS parameterizat...
2008, 30(9): 2046-2050.
doi: 10.3724/SP.J.1146.2007.00275
Abstract:
Based on the squinted mode Synthetic Aperture Radar (SAR), this paper describes the relationship between system parameters (wavelength, squint angle, resolution, swath) and phase errors, which caused by the approximation of slant range and 2-D freque...
Based on the squinted mode Synthetic Aperture Radar (SAR), this paper describes the relationship between system parameters (wavelength, squint angle, resolution, swath) and phase errors, which caused by the approximation of slant range and 2-D freque...
2008, 30(9): 2051-2054.
doi: 10.3724/SP.J.1146.2007.00334
Abstract:
This paper presents a method for synthetic aperture radar images target recognition based on multi images of the same target and Hidden Markov Models (HMM). Feature vectors of target images are extracted with principal component analysis in wavelet d...
This paper presents a method for synthetic aperture radar images target recognition based on multi images of the same target and Hidden Markov Models (HMM). Feature vectors of target images are extracted with principal component analysis in wavelet d...
2008, 30(9): 2055-2059.
doi: 10.3724/SP.J.1146.2007.00176
Abstract:
The micro-Doppler effect may be generated by additional frequency modulations on the returned radar signal, if the target contains rotating structures, such as a rotor on a helicopter. The body image will be contaminated duo to the existence of the m...
The micro-Doppler effect may be generated by additional frequency modulations on the returned radar signal, if the target contains rotating structures, such as a rotor on a helicopter. The body image will be contaminated duo to the existence of the m...
2008, 30(9): 2060-2064.
doi: 10.3724/SP.J.1146.2007.00072
Abstract:
Target-aspect sensitivity makes High Resolution Range Profiles (HRRP) become a long sequence with statistical characteristic changing continuously. A novel frame segmentation method based on correlation coefficient is presented according to the stati...
Target-aspect sensitivity makes High Resolution Range Profiles (HRRP) become a long sequence with statistical characteristic changing continuously. A novel frame segmentation method based on correlation coefficient is presented according to the stati...
2008, 30(9): 2065-2068.
doi: 10.3724/SP.J.1146.2007.00193
Abstract:
In this paper, a new approach to bi-static SAR range resolution in ground plane, based on special gradient of transit time, is developed. This new approach has more adaptability. The physical meaning of special gradient is analyzed and its temporal c...
In this paper, a new approach to bi-static SAR range resolution in ground plane, based on special gradient of transit time, is developed. This new approach has more adaptability. The physical meaning of special gradient is analyzed and its temporal c...
2008, 30(9): 2069-2072.
doi: 10.3724/SP.J.1146.2007.00258
Abstract:
Besides the crosstalk and channel imbalance f of SAR system, calibration of the spaceborne Polarimetric SAR(PolSAR) also needs to consider the correction of Faraday rotation. This paper proposes a method for estimating Faraday rotation and channel im...
Besides the crosstalk and channel imbalance f of SAR system, calibration of the spaceborne Polarimetric SAR(PolSAR) also needs to consider the correction of Faraday rotation. This paper proposes a method for estimating Faraday rotation and channel im...
2008, 30(9): 2073-2076.
doi: 10.3724/SP.J.1146.2007.00297
Abstract:
Two-dimensional spectrums analytical expression is the basis of the frequency domain imaging algorithm for SAR system. A solution for the approximated two-dimensional spectrums analytical expression of spaceborne/airborne hybrid BSAR is presented. To...
Two-dimensional spectrums analytical expression is the basis of the frequency domain imaging algorithm for SAR system. A solution for the approximated two-dimensional spectrums analytical expression of spaceborne/airborne hybrid BSAR is presented. To...
2008, 30(9): 2077-2080.
doi: 10.3724/SP.J.1146.2007.00227
Abstract:
The major problem in air-borne Ultra-WideBand Synthetic Aperture Radar (UWB SAR) landmine detection is the too many false alarms in practical operation, while enhancement of metallic landmine double-peak feature will benefit elimination of false alar...
The major problem in air-borne Ultra-WideBand Synthetic Aperture Radar (UWB SAR) landmine detection is the too many false alarms in practical operation, while enhancement of metallic landmine double-peak feature will benefit elimination of false alar...
2008, 30(9): 2081-2084.
doi: 10.3724/SP.J.1146.2007.00591
Abstract:
Object discrimination based on resonant properties is one of the research topics in radar detection domain. Obvious transient resonances will take place for some kinds of underground Perfectly Electrical Conductors (PEC) targets under impulse electro...
Object discrimination based on resonant properties is one of the research topics in radar detection domain. Obvious transient resonances will take place for some kinds of underground Perfectly Electrical Conductors (PEC) targets under impulse electro...
2008, 30(9): 2085-2088.
doi: 10.3724/SP.J.1146.2007.00317
Abstract:
In this paper, the effect of some factors such as the size of real antenna, different ionospheric spectra and the size of ionospheric irregularities on the azimuth resolution of Synthetic Aperture Radar(SAR) is investigated. The results showed that i...
In this paper, the effect of some factors such as the size of real antenna, different ionospheric spectra and the size of ionospheric irregularities on the azimuth resolution of Synthetic Aperture Radar(SAR) is investigated. The results showed that i...
2008, 30(9): 2089-2093.
doi: 10.3724/SP.J.1146.2007.00129
Abstract:
The cross-range of ISAR image corresponds with the Doppler frequencies of scatterers, which is decided by the target motion. If the cross-range of ISAR image is not scaled, it is difficult to recognize by ISAR image. In this paper a novel method of i...
The cross-range of ISAR image corresponds with the Doppler frequencies of scatterers, which is decided by the target motion. If the cross-range of ISAR image is not scaled, it is difficult to recognize by ISAR image. In this paper a novel method of i...
2008, 30(9): 2094-2098.
doi: 10.3724/SP.J.1146.2007.00179
Abstract:
The main change detection algorithms include forming likelihood ratio algorithm and Least Mean Square (LMS) image subtraction algorithm in Synthetic Aperture Radar (SAR) target detection. There are respective problems for two change detection algorit...
The main change detection algorithms include forming likelihood ratio algorithm and Least Mean Square (LMS) image subtraction algorithm in Synthetic Aperture Radar (SAR) target detection. There are respective problems for two change detection algorit...
2008, 30(9): 2099-2102.
doi: 10.3724/SP.J.1146.2007.00239
Abstract:
This paper works on a critical issue of roll angle estimation in ScanSAR radiometric calibration. After a deep analysis of the relative discrepancies between constituent beams, an improved algorithm is proposed, whose estimation model takes into acco...
This paper works on a critical issue of roll angle estimation in ScanSAR radiometric calibration. After a deep analysis of the relative discrepancies between constituent beams, an improved algorithm is proposed, whose estimation model takes into acco...
2008, 30(9): 2103-2106.
doi: 10.3724/SP.J.1146.2007.00305
Abstract:
Remote sensing imagery plays a key role in forestry management. The increasing availability of data and their high spatial resolution make the tree crown extraction necessary and possible. Marked point processes are employed to model the tree crowns,...
Remote sensing imagery plays a key role in forestry management. The increasing availability of data and their high spatial resolution make the tree crown extraction necessary and possible. Marked point processes are employed to model the tree crowns,...
2008, 30(9): 2107-2110.
doi: 10.3724/SP.J.1146.2007.00366
Abstract:
Influence of frequency, incident angle, soil dielectric on the penetration ability of electromagnetic wave is quantitatively analyzed. The backscattering from multilayered soil is studied. The model is validated against known solutions to special cas...
Influence of frequency, incident angle, soil dielectric on the penetration ability of electromagnetic wave is quantitatively analyzed. The backscattering from multilayered soil is studied. The model is validated against known solutions to special cas...
2008, 30(9): 2111-2114.
doi: 10.3724/SP.J.1146.2007.00231
Abstract:
The Digital Radio Frequency Memory Cheat Jamming (DRFMCJ) is an effective jamming method to SAR. This paper puts forword a method to generate the complex modulation LFM signal using the slope wobble in different Pulse Repetition Interval (PRI). Becau...
The Digital Radio Frequency Memory Cheat Jamming (DRFMCJ) is an effective jamming method to SAR. This paper puts forword a method to generate the complex modulation LFM signal using the slope wobble in different Pulse Repetition Interval (PRI). Becau...
2008, 30(9): 2115-2119.
doi: 10.3724/SP.J.1146.2007.00205
Abstract:
This paper presents a smoothed pseudo Wigner distribution for PN phase modulation composite reconnaissance signal recognition and deduces SPWVD functions for PRBC-LFM reconnaissance signal. By profile SPWVD distribution analysis，features related to c...
This paper presents a smoothed pseudo Wigner distribution for PN phase modulation composite reconnaissance signal recognition and deduces SPWVD functions for PRBC-LFM reconnaissance signal. By profile SPWVD distribution analysis，features related to c...
2008, 30(9): 2120-2123.
doi: 10.3724/SP.J.1146.2007.00264
Abstract:
Nonlinear filtering algorithms must be applied to single observer passive location and tracking system for the nonlinearity of its observation equations. MGEKF and other nonlinear filters are belong to EKF in essence, while the EKF-like algorithms sh...
Nonlinear filtering algorithms must be applied to single observer passive location and tracking system for the nonlinearity of its observation equations. MGEKF and other nonlinear filters are belong to EKF in essence, while the EKF-like algorithms sh...
2008, 30(9): 2124-2127.
doi: 10.3724/SP.J.1146.2007.00364
Abstract:
For reducing the computation complexity of pulse period ambiguity resolution for X-ray Pulsars NAVigation (XPNAV) and improving its convenience in engineering implementation, the Optimization Model for 4 X-ray pulsars localization is presented based ...
For reducing the computation complexity of pulse period ambiguity resolution for X-ray Pulsars NAVigation (XPNAV) and improving its convenience in engineering implementation, the Optimization Model for 4 X-ray pulsars localization is presented based ...
2008, 30(9): 2128-2133.
doi: 10.3724/SP.J.1146.2007.00273
Abstract:
The dual particle filter is proposed to solve the problem of simultaneously estimating the state and the parameter of a nonlinear dynamic system. In the new filter, the sufficient statistics based particle filter is adopted to deal with sampling impo...
The dual particle filter is proposed to solve the problem of simultaneously estimating the state and the parameter of a nonlinear dynamic system. In the new filter, the sufficient statistics based particle filter is adopted to deal with sampling impo...
2008, 30(9): 2134-2137.
doi: 10.3724/SP.J.1146.2007.00257
Abstract:
Sound source localization using microphone array provides an effective solution to speaker tracking problem under adverse environments. A new method based on weighted subspace fitting is presented for sound source localization and tracking within the...
Sound source localization using microphone array provides an effective solution to speaker tracking problem under adverse environments. A new method based on weighted subspace fitting is presented for sound source localization and tracking within the...
2008, 30(9): 2138-2142.
doi: 10.3724/SP.J.1146.2007.00158
Abstract:
A system identification algorithm which is based on minimizing the zero-minimum target function is proposed. The target function presented in this paper is the square of the difference between the mean square error and the variance of the noise. And ...
A system identification algorithm which is based on minimizing the zero-minimum target function is proposed. The target function presented in this paper is the square of the difference between the mean square error and the variance of the noise. And ...
2008, 30(9): 2143-2147.
doi: 10.3724/SP.J.1146.2007.00238
Abstract:
A Dynamic Displacement Field (DDF) model for describing image sequence distortion is proposed. The parameterized DDF model offers a unified framework that covers all the reported image sequence distortions. Experimental results show that the DDF mode...
A Dynamic Displacement Field (DDF) model for describing image sequence distortion is proposed. The parameterized DDF model offers a unified framework that covers all the reported image sequence distortions. Experimental results show that the DDF mode...
2008, 30(9): 2148-2151.
doi: 10.3724/SP.J.1146.2007.00688
Abstract:
A new method based on ACA (Ant Colony Algorithm) is proposed for data association in multi-target tracking. Firstly, the ACA is modified according to specific data association rule, in which the path of ACA and the length of the path are redefined by...
A new method based on ACA (Ant Colony Algorithm) is proposed for data association in multi-target tracking. Firstly, the ACA is modified according to specific data association rule, in which the path of ACA and the length of the path are redefined by...
2008, 30(9): 2152-2155.
doi: 10.3724/SP.J.1146.2007.00214
Abstract:
Although numerous studies measure the strengths of perceptual organization cues for grouping contour, most ignore the roles of symmetry and parallel principles in grouping contour. A hierarchy grouping model is developed. Firstly, most saliency edges...
Although numerous studies measure the strengths of perceptual organization cues for grouping contour, most ignore the roles of symmetry and parallel principles in grouping contour. A hierarchy grouping model is developed. Firstly, most saliency edges...
2008, 30(9): 2156-2161.
doi: 10.3724/SP.J.1146.2007.00177
Abstract:
Aiming at the conflicts between EMD(Earth Movers Distance)-based measure for document semantic similarity and metric axioms, which prevent EMD from being widely applied in the information retrieval and data mining, a novel EMD-based metric for docume...
Aiming at the conflicts between EMD(Earth Movers Distance)-based measure for document semantic similarity and metric axioms, which prevent EMD from being widely applied in the information retrieval and data mining, a novel EMD-based metric for docume...
2008, 30(9): 2162-2165.
doi: 10.3724/SP.J.1146.2007.00232
Abstract:
The robust Fuzzy Fisher Criterion based Semi-Fuzzy Clustering Algorithm (FFC-SFCA) for linearly separable data is presented in this paper. FFC-SFCA incorporates Fisher discrimination method with fuzzy theory using fuzzy scatter matrix. By iteratively...
The robust Fuzzy Fisher Criterion based Semi-Fuzzy Clustering Algorithm (FFC-SFCA) for linearly separable data is presented in this paper. FFC-SFCA incorporates Fisher discrimination method with fuzzy theory using fuzzy scatter matrix. By iteratively...
2008, 30(9): 2166-2169.
doi: 10.3724/SP.J.1146.2007.01467
Abstract:
In view of intermittent chaotic signal identification problem for chaotic oscillator weak signal detection, noise disturbing effect on Poincar section is analyzed, a new identification method based on a Poincar map is proposed and numerical simulatio...
In view of intermittent chaotic signal identification problem for chaotic oscillator weak signal detection, noise disturbing effect on Poincar section is analyzed, a new identification method based on a Poincar map is proposed and numerical simulatio...
2008, 30(9): 2170-2173.
doi: 10.3724/SP.J.1146.2007.00327
Abstract:
This paper proposes an iterative Signal-to-Noise Ratio (SNR) estimation algorithm suited to Multiple Amplitude Phase Shift Keying (M-APSK) signal based on a priori information. Given a priori, the M-PASK signal has the determinate probability distrib...
This paper proposes an iterative Signal-to-Noise Ratio (SNR) estimation algorithm suited to Multiple Amplitude Phase Shift Keying (M-APSK) signal based on a priori information. Given a priori, the M-PASK signal has the determinate probability distrib...
2008, 30(9): 2174-2177.
doi: 10.3724/SP.J.1146.2007.00326
Abstract:
In Short Burst wireless communication and non-corporation communication, the receive data is not long enough to use in Bussgang blind equalization method. In this paper reusing data was introduced to shalvis blind equalization algorithm, by comparing...
In Short Burst wireless communication and non-corporation communication, the receive data is not long enough to use in Bussgang blind equalization method. In this paper reusing data was introduced to shalvis blind equalization algorithm, by comparing...
2008, 30(9): 2178-2181.
doi: 10.3724/SP.J.1146.2007.00304
Abstract:
A modification is proposed to reduce the complexity of Overlap-Cut (OC) method Frequency Domain Equalization (FDE) in Code Division Multiple Access (CDMA) downlink systems. FDE based on Fast Fourier Transform/Inverse Fast Fourier Transform (FFT/IFFT)...
A modification is proposed to reduce the complexity of Overlap-Cut (OC) method Frequency Domain Equalization (FDE) in Code Division Multiple Access (CDMA) downlink systems. FDE based on Fast Fourier Transform/Inverse Fast Fourier Transform (FFT/IFFT)...
2008, 30(9): 2182-2184.
doi: 10.3724/SP.J.1146.2007.00895
Abstract:
In order to realize the precise multi-beam forming, a calibration method of the amplitude and phase error among RF channels for the transmitting multi-beam array antenna system onboard satellite is proposed. This method is conducted by receiving the ...
In order to realize the precise multi-beam forming, a calibration method of the amplitude and phase error among RF channels for the transmitting multi-beam array antenna system onboard satellite is proposed. This method is conducted by receiving the ...
2008, 30(9): 2185-2188.
doi: 10.3724/SP.J.1146.2007.00301
Abstract:
High data rates and high mobility induced Doppler shifts introduce time and frequency selectivity in wireless links. The quality of channel acquisition has a major impact on the overall system performance. In this paper, relying on a basis expansion ...
High data rates and high mobility induced Doppler shifts introduce time and frequency selectivity in wireless links. The quality of channel acquisition has a major impact on the overall system performance. In this paper, relying on a basis expansion ...
2008, 30(9): 2189-2192.
doi: 10.3724/SP.J.1146.2007.00312
Abstract:
Rapidly time-varying channels degrade the performance of the Orthogonal Frequency Division Multiplexing (OFDM) due to severe InterCarrier-Interference (ICI). The most effective method of canceling the ICI is frequency equalization. But, it relies on ...
Rapidly time-varying channels degrade the performance of the Orthogonal Frequency Division Multiplexing (OFDM) due to severe InterCarrier-Interference (ICI). The most effective method of canceling the ICI is frequency equalization. But, it relies on ...
2008, 30(9): 2193-2197.
doi: 10.3724/SP.J.1146.2007.00145
Abstract:
Using a Compact Mapping Matrix (CMM) to transform a diagonal space-time coding, a design method for full-diversity space-frequency codes is proposed. Without losing the inherent space diversity of the space-time coding, the proposed space-frequency c...
Using a Compact Mapping Matrix (CMM) to transform a diagonal space-time coding, a design method for full-diversity space-frequency codes is proposed. Without losing the inherent space diversity of the space-time coding, the proposed space-frequency c...
2008, 30(9): 2198-2202.
doi: 10.3724/SP.J.1146.2007.00128
Abstract:
A non-orthogonal decode-and-forward scheme with relay selection is proposed in order to achieve higher spectral efficiency and more cooperative diversity gain in the two-hop relay networks. In the single relay case, the relay node is available to coo...
A non-orthogonal decode-and-forward scheme with relay selection is proposed in order to achieve higher spectral efficiency and more cooperative diversity gain in the two-hop relay networks. In the single relay case, the relay node is available to coo...
2008, 30(9): 2203-2206.
doi: 10.3724/SP.J.1146.2007.00245
Abstract:
This paper presents a new method of intra/inter-TTI frequency hopping in E-UTRA uplink. The hopping method decides the starting frequency according to Latin square and users frequency resource requirements. The method that can keep single carrier tra...
This paper presents a new method of intra/inter-TTI frequency hopping in E-UTRA uplink. The hopping method decides the starting frequency according to Latin square and users frequency resource requirements. The method that can keep single carrier tra...
2008, 30(9): 2207-2210.
doi: 10.3724/SP.J.1146.2007.00291
Abstract:
A signal detection and synchronization acquisition scheme is proposed for distributed Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system. Reliable signal detection scheme and coarse time and coarse frequency ...
A signal detection and synchronization acquisition scheme is proposed for distributed Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system. Reliable signal detection scheme and coarse time and coarse frequency ...
2008, 30(9): 2211-2215.
doi: 10.3724/SP.J.1146.2007.00241
Abstract:
A novel image coding scheme based on sparse decomposition is proposed to improve decoded image quality and vision impact at low bit-rates. The over-complete dictionary, which is built on anisotropic refinement and rotation of 2D nonseparable Mexican ...
A novel image coding scheme based on sparse decomposition is proposed to improve decoded image quality and vision impact at low bit-rates. The over-complete dictionary, which is built on anisotropic refinement and rotation of 2D nonseparable Mexican ...
2008, 30(9): 2216-2219.
doi: 10.3724/SP.J.1146.2007.00938
Abstract:
Maximize signal-to-leakage ratio strategy is proposed in multi-user multi input multi output system, which is used to design MU-VBLAST downlink. The performance of the strategy proposed in the paper exceeds that of Block Diagonalization (BD) method w...
Maximize signal-to-leakage ratio strategy is proposed in multi-user multi input multi output system, which is used to design MU-VBLAST downlink. The performance of the strategy proposed in the paper exceeds that of Block Diagonalization (BD) method w...
2008, 30(9): 2220-2224.
doi: 10.3724/SP.J.1146.2007.00152
Abstract:
It is adopted the wireless channel, limited battery energy and distributed control techniques in wireless Ad hoc networks, so the existing questions are channel safety threat and more power consumption. To solve above questions, we develop a joint so...
It is adopted the wireless channel, limited battery energy and distributed control techniques in wireless Ad hoc networks, so the existing questions are channel safety threat and more power consumption. To solve above questions, we develop a joint so...
2008, 30(9): 2225-2228.
doi: 10.3724/SP.J.1146.2007.00213
Abstract:
An algorithm of traffic distribution forecasting based on simulated annealing is proposed, which is used to calculate the traffic density by simulated annealing. Furthermore, the weight value of traffic density is taken into account in this paper, wh...
An algorithm of traffic distribution forecasting based on simulated annealing is proposed, which is used to calculate the traffic density by simulated annealing. Furthermore, the weight value of traffic density is taken into account in this paper, wh...
2008, 30(9): 2229-2232.
doi: 10.3724/SP.J.1146.2007.00281
Abstract:
A new scheduling algorithm in Parallel Packet Switch(PPS) is proposed in this paper . This algorithm eliminates out-of sequence of the cells belonging to a packet by dispatching the traffic with variable-length packet at de-multiplexer. It balances t...
A new scheduling algorithm in Parallel Packet Switch(PPS) is proposed in this paper . This algorithm eliminates out-of sequence of the cells belonging to a packet by dispatching the traffic with variable-length packet at de-multiplexer. It balances t...
2008, 30(9): 2233-2237.
doi: 10.3724/SP.J.1146.2007.00302
Abstract:
The indoor broadband LAN (Local Area Network) is the extension of the Internet and is also the technique basement of the smart house in the future. This paper introduces one novel method to make up the indoor broadband network firstly with the BPL (B...
The indoor broadband LAN (Local Area Network) is the extension of the Internet and is also the technique basement of the smart house in the future. This paper introduces one novel method to make up the indoor broadband network firstly with the BPL (B...
2008, 30(9): 2238-2241.
doi: 10.3724/SP.J.1146.2007.00215
Abstract:
In this paper, a novel cooperative routing protocol is proposed in Ad hoc networks. A minimal energy multinodes cooperative path is built with the cooperative transmission of neighbor nodes and comparison of total power consumption. Under the assumpt...
In this paper, a novel cooperative routing protocol is proposed in Ad hoc networks. A minimal energy multinodes cooperative path is built with the cooperative transmission of neighbor nodes and comparison of total power consumption. Under the assumpt...
2008, 30(9): 2242-2245.
doi: 10.3724/SP.J.1146.2007.00206
Abstract:
To solve the static traffic grooming problem in WDM mesh networks, a minimizing cost grooming policy is proposed based on the transceiver saving auxiliary graph model. The policy considers the costs of both two network resources of transceivers and w...
To solve the static traffic grooming problem in WDM mesh networks, a minimizing cost grooming policy is proposed based on the transceiver saving auxiliary graph model. The policy considers the costs of both two network resources of transceivers and w...
2008, 30(9): 2246-2249.
doi: 10.3724/SP.J.1146.2007.01986
Abstract:
A compact multi-signature is a special digital signature that allows multiple signers to generate a signature on the same message with the property that the length of the signature is almost same as that of an individual signature. An efficient ident...
A compact multi-signature is a special digital signature that allows multiple signers to generate a signature on the same message with the property that the length of the signature is almost same as that of an individual signature. An efficient ident...
2008, 30(9): 2250-2253.
doi: 10.3724/SP.J.1146.2007.01432
Abstract:
An energy-balanced connected coverage model is proposed for solve the problems that limited energy of sensor nodes and imbalanced energy consumption of minimal connected cover methods make against the lifespan of wireless sensor networks. The model u...
An energy-balanced connected coverage model is proposed for solve the problems that limited energy of sensor nodes and imbalanced energy consumption of minimal connected cover methods make against the lifespan of wireless sensor networks. The model u...
2008, 30(9): 2254-2258.
doi: 10.3724/SP.J.1146.2007.00296
Abstract:
in this paper, an energy efficient Adaptive Fusion Mobile-agent-based Routing algorithm (AFMR) is presented in Wireless Sensor Networks (WSN), where AFMR can provide energy efficient Mobile Agent (MA) routing algorithm for correlated data gathering. ...
in this paper, an energy efficient Adaptive Fusion Mobile-agent-based Routing algorithm (AFMR) is presented in Wireless Sensor Networks (WSN), where AFMR can provide energy efficient Mobile Agent (MA) routing algorithm for correlated data gathering. ...
2008, 30(9): 2259-2262.
doi: 10.3724/SP.J.1146.2007.00337
Abstract:
In this paper, the optimal grid size is studied based on link model reachable with probability in realistic environment. Reaching probabilities of neighboring grids and path are analyzed, and the effects of node density and grid size on reaching prob...
In this paper, the optimal grid size is studied based on link model reachable with probability in realistic environment. Reaching probabilities of neighboring grids and path are analyzed, and the effects of node density and grid size on reaching prob...
2008, 30(9): 2263-2266.
doi: 10.3724/SP.J.1146.2007.00249
Abstract:
Traditional localization methods usually can not handle sensor networks which are affected by several practical factors, such as anisotropic deployment terrain, imprecise anchor node position and noisy range measurements. In this paper, a robust regi...
Traditional localization methods usually can not handle sensor networks which are affected by several practical factors, such as anisotropic deployment terrain, imprecise anchor node position and noisy range measurements. In this paper, a robust regi...
2008, 30(9): 2267-2270.
doi: 10.3724/SP.J.1146.2007.00256
Abstract:
Firstly, it is found that the physical communication link of WSNs takes on lost, asymmetric characteristics according to experimental measurements. Secondly, some typical reliable transmission mechanisms of link layer provide a certain degree of reli...
Firstly, it is found that the physical communication link of WSNs takes on lost, asymmetric characteristics according to experimental measurements. Secondly, some typical reliable transmission mechanisms of link layer provide a certain degree of reli...
2008, 30(9): 2271-2275.
doi: 10.3724/SP.J.1146.2007.00166
Abstract:
The problem of data transmission in energy-constrained wireless sensor networks is modeled into a network utility maximization problem. This model describes the coupled nature of the energy consumption among different sensor nodes. The network utilit...
The problem of data transmission in energy-constrained wireless sensor networks is modeled into a network utility maximization problem. This model describes the coupled nature of the energy consumption among different sensor nodes. The network utilit...
2008, 30(9): 2276-2278.
doi: 10.3724/SP.J.1146.2007.00329
Abstract:
Theoretical model of a double cusp gun is analyzed; model of magnetic cusp is built up. By using of EGUN and MAGIC, a double cusp gun producing large orbit gyration electron beam is designed, with beam velocity ratio of 1.38 and axial velocity spread...
Theoretical model of a double cusp gun is analyzed; model of magnetic cusp is built up. By using of EGUN and MAGIC, a double cusp gun producing large orbit gyration electron beam is designed, with beam velocity ratio of 1.38 and axial velocity spread...
2008, 30(9): 2279-2282.
doi: 10.3724/SP.J.1146.2007.00209
Abstract:
A multi-tap broadband channel model is established according to Power-Azimuth-Spectrum(PAS), Doppler-Power-Spectral-Density(DPSD), Power-Delay-Profile(PDP) and the antenna structures of both transmitter and receiver. An improved shaping-filter method...
A multi-tap broadband channel model is established according to Power-Azimuth-Spectrum(PAS), Doppler-Power-Spectral-Density(DPSD), Power-Delay-Profile(PDP) and the antenna structures of both transmitter and receiver. An improved shaping-filter method...
2008, 30(9): 2283-2286.
doi: 10.3724/SP.J.1146.2007.00310
Abstract:
An approach to available bandwidth measurement in IPv6 networks called Packet Train Time Stamp (PTTS) is proposed. A new packet train (Mh-L-Mt) is designed in which the measurement packets have the IPv6 time stamp extension header and the load packet...
An approach to available bandwidth measurement in IPv6 networks called Packet Train Time Stamp (PTTS) is proposed. A new packet train (Mh-L-Mt) is designed in which the measurement packets have the IPv6 time stamp extension header and the load packet...
