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2009 Vol. 31, No. 2
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2009, 31(2): 255-260.
doi: 10.3724/SP.J.1146.2007.01265
Abstract:
Nonnegative Matrix Factorization (NMF) is a recently developed technique for nonlinearly finding purely additive, parts-based, linear, and low-dimension representations of nonnegative multivariate data to consequently reveal the latent structure, fea...
Nonnegative Matrix Factorization (NMF) is a recently developed technique for nonlinearly finding purely additive, parts-based, linear, and low-dimension representations of nonnegative multivariate data to consequently reveal the latent structure, fea...
2009, 31(2): 261-264.
doi: 10.3724/SP.J.1146.2007.01754
Abstract:
To reduce image collection conditions in image mosaic, an adaptive Region of Interest (ROI) search algorithm is developed for enhancing adaptability and flexibility in process of image mosaic. The method searches ROI to realize image registration for...
To reduce image collection conditions in image mosaic, an adaptive Region of Interest (ROI) search algorithm is developed for enhancing adaptability and flexibility in process of image mosaic. The method searches ROI to realize image registration for...
2009, 31(2): 265-269.
doi: 10.3724/SP.J.1146.2007.01218
Abstract:
Image interpolation is an important technique of image processing. The blur and jaggy of image details or edges are inevitable during conventional image interpolation. In order to obtain interpolation images with better quality, the improved bilinear...
Image interpolation is an important technique of image processing. The blur and jaggy of image details or edges are inevitable during conventional image interpolation. In order to obtain interpolation images with better quality, the improved bilinear...
2009, 31(2): 270-274.
doi: 10.3724/SP.J.1146.2006.02013
Abstract:
When Web images are indexed, the textual information in the hosting web pages are usually used as approximate image description. However, such information is not accurate enough. In this paper, a framework is proposed to utilize the visual content, t...
When Web images are indexed, the textual information in the hosting web pages are usually used as approximate image description. However, such information is not accurate enough. In this paper, a framework is proposed to utilize the visual content, t...
2009, 31(2): 275-278.
doi: 10.3724/SP.J.1146.2007.01272
Abstract:
This paper presents an adaptive particle filtering algorithm for image tracking based on weighted color probability contribution. First, a weighted color contribution graph is proposed. Taking use of the graph, similarity between target template and ...
This paper presents an adaptive particle filtering algorithm for image tracking based on weighted color probability contribution. First, a weighted color contribution graph is proposed. Taking use of the graph, similarity between target template and ...
2009, 31(2): 279-282.
doi: 10.3724/SP.J.1146.2007.01458
Abstract:
Analyzing the inner configuration of the covariance matrix, a new multiple targets DOA tracking algorithm is presented based on a matrix norm minimization technique. Furthermore, by solving a set of linear equations, the power of each target is got a...
Analyzing the inner configuration of the covariance matrix, a new multiple targets DOA tracking algorithm is presented based on a matrix norm minimization technique. Furthermore, by solving a set of linear equations, the power of each target is got a...
2009, 31(2): 283-287.
doi: 10.3724/SP.J.1146.2007.01450
Abstract:
In this paper, considering kernel and orthogonal basis functions, a new method named kernel based orthogonal locality preserving projections algorithm, which aims at discovering an embedding that preserves nonlinear information is proposed for face r...
In this paper, considering kernel and orthogonal basis functions, a new method named kernel based orthogonal locality preserving projections algorithm, which aims at discovering an embedding that preserves nonlinear information is proposed for face r...
2009, 31(2): 288-292.
doi: 10.3724/SP.J.1146.2007.01224
Abstract:
The performance of Embedded Hidden Markov Model (E-HMM) based face recognition algorithm heavily depends on the selection of model parameters. A selective ensemble of multi E-HMMs based face recognition algorithm is proposed, selecting many accurate ...
The performance of Embedded Hidden Markov Model (E-HMM) based face recognition algorithm heavily depends on the selection of model parameters. A selective ensemble of multi E-HMMs based face recognition algorithm is proposed, selecting many accurate ...
2009, 31(2): 293-296.
doi: 10.3724/SP.J.1146.2007.01360
Abstract:
According to the mode of rejecting pattern recognition principles, which is based on matter description and matter separation in uniform statistical pattern recognition, a rejecting nearest neighbor classifier based on structural risk minimization se...
According to the mode of rejecting pattern recognition principles, which is based on matter description and matter separation in uniform statistical pattern recognition, a rejecting nearest neighbor classifier based on structural risk minimization se...
2009, 31(2): 297-301.
doi: 10.3724/SP.J.1146.2007.01216
Abstract:
In this paper, a novel Multi-stream Multi-states Asynchronous Dynamic Bayesian Network based context-dependent TRIphone (MM-ADBN-TRI) model is proposed for audio-visual speech recognition and phone segmentation. The model looses the asynchrony of aud...
In this paper, a novel Multi-stream Multi-states Asynchronous Dynamic Bayesian Network based context-dependent TRIphone (MM-ADBN-TRI) model is proposed for audio-visual speech recognition and phone segmentation. The model looses the asynchrony of aud...
2009, 31(2): 302-305.
doi: 10.3724/SP.J.1146.2007.01289
Abstract:
In the text-independent speaker recognition system, the mean-supervector of Gaussian Mixture Models (GMM) and Support Vector Machine (SVM) system can outperform the traditional GMM and Universal Background Models (UBM) system, but the session variabi...
In the text-independent speaker recognition system, the mean-supervector of Gaussian Mixture Models (GMM) and Support Vector Machine (SVM) system can outperform the traditional GMM and Universal Background Models (UBM) system, but the session variabi...
2009, 31(2): 306-309.
doi: 10.3724/SP.J.1146.2007.01494
Abstract:
Common-Acoustical-Poles/Zeros (CAPZ) approximation is an efficient way to model Head-Related Transfer Functions (HRTF), which requires fewer parameters than pole/zero model. Conventional methods estimate CAPZ model parameters based on least square er...
Common-Acoustical-Poles/Zeros (CAPZ) approximation is an efficient way to model Head-Related Transfer Functions (HRTF), which requires fewer parameters than pole/zero model. Conventional methods estimate CAPZ model parameters based on least square er...
2009, 31(2): 310-313.
doi: 10.3724/SP.J.1146.2007.01230
Abstract:
Translation example base is the main knowledge source of example-based machine translation system. In this paper, a shallow parsing information based approach is proposed to extract translation examples. First, translation units of source and target ...
Translation example base is the main knowledge source of example-based machine translation system. In this paper, a shallow parsing information based approach is proposed to extract translation examples. First, translation units of source and target ...
2009, 31(2): 314-318.
doi: 10.3724/SP.J.1146.2007.01462
Abstract:
For motor related Brain-Computer Interface (BCI), if the sample size is small, Common Spatial Patterns (CSP) algorithm is sensitive to outlier data and lacks of robustness. In this paper, an Adaptive Spatial Filter (ASF) algorithm is proposed to take...
For motor related Brain-Computer Interface (BCI), if the sample size is small, Common Spatial Patterns (CSP) algorithm is sensitive to outlier data and lacks of robustness. In this paper, an Adaptive Spatial Filter (ASF) algorithm is proposed to take...
2009, 31(2): 319-322.
doi: 10.3724/SP.J.1146.2007.01370
Abstract:
A new sparse measure of signals is proposed in this paper. After the number of efficient sources is estimated, the observations are classified using Support Vector Machine (SVM) trained through samples which are constructed by the direction angles of...
A new sparse measure of signals is proposed in this paper. After the number of efficient sources is estimated, the observations are classified using Support Vector Machine (SVM) trained through samples which are constructed by the direction angles of...
2009, 31(2): 323-326.
doi: 10.3724/SP.J.1146.2007.01300
Abstract:
In many two-dimensional (2D) Direction Of Arrival (DOA) estimation approaches for coherently distributed source, the computational complexity induced by 2D searching manipulation is prohibitively high. A decoupled 2D DOA estimation algorithm is propo...
In many two-dimensional (2D) Direction Of Arrival (DOA) estimation approaches for coherently distributed source, the computational complexity induced by 2D searching manipulation is prohibitively high. A decoupled 2D DOA estimation algorithm is propo...
2009, 31(2): 327-330.
doi: 10.3724/SP.J.1146.2007.01299
Abstract:
Based on fourth-order cumulant, this paper presents a new method, i.e. CTSS algorithm, for joint estimation of frequency and 2-D arrival angles of coherent signals. Firstly a time-space smoothing matrix is constructed by temporal and spatial data of ...
Based on fourth-order cumulant, this paper presents a new method, i.e. CTSS algorithm, for joint estimation of frequency and 2-D arrival angles of coherent signals. Firstly a time-space smoothing matrix is constructed by temporal and spatial data of ...
2009, 31(2): 331-334.
doi: 10.3724/SP.J.1146.2007.01286
Abstract:
In this paper, a set of eigen matrices are introduced which possess diagonal structure. A new iterative algorithm is proposed to implement the joint diagonalization of the eigen matrices, the harmonic retrieval can be accomplished by the diagonalizat...
In this paper, a set of eigen matrices are introduced which possess diagonal structure. A new iterative algorithm is proposed to implement the joint diagonalization of the eigen matrices, the harmonic retrieval can be accomplished by the diagonalizat...
2009, 31(2): 335-338.
doi: 10.3724/SP.J.1146.2007.01288
Abstract:
Reduced-reference image quality measure has become to be one of the focuses in image processing fields. In this paper, a reduced-reference image quality assessment method based on wavelet is proposed. Based on the character of the human visual system...
Reduced-reference image quality measure has become to be one of the focuses in image processing fields. In this paper, a reduced-reference image quality assessment method based on wavelet is proposed. Based on the character of the human visual system...
2009, 31(2): 339-342.
doi: 10.3724/SP.J.1146.2007.01372
Abstract:
In spacecraft, hardware resources and energy are limited, which restricts the hardware consumption of the variable rate demodulation in Telemetry and Telecommand(TTC) systems. This paper proposes an algorithm which accomplishes variable rate demodula...
In spacecraft, hardware resources and energy are limited, which restricts the hardware consumption of the variable rate demodulation in Telemetry and Telecommand(TTC) systems. This paper proposes an algorithm which accomplishes variable rate demodula...
2009, 31(2): 343-348.
doi: 10.3724/SP.J.1146.2008.00227
Abstract:
Risk analyses performed by several space agencies have provided indications of the impact of different threats on several categories of space missions in the context of space communication. A method of integrating the GCM (Galois/Counter Mode) into d...
Risk analyses performed by several space agencies have provided indications of the impact of different threats on several categories of space missions in the context of space communication. A method of integrating the GCM (Galois/Counter Mode) into d...
2009, 31(2): 349-352.
doi: 10.3724/SP.J.1146.2007.01540
Abstract:
Radar (SAR) autofocus processing, whose performance degenerates with low contrast of the scene. This paper proposes an improved RDM for SAR autofocusing. Based on the relationship between the Doppler rate and the range, the proposed method can adapti...
Radar (SAR) autofocus processing, whose performance degenerates with low contrast of the scene. This paper proposes an improved RDM for SAR autofocusing. Based on the relationship between the Doppler rate and the range, the proposed method can adapti...
2009, 31(2): 353-357.
doi: 10.3724/SP.J.1146.2007.01417
Abstract:
Concerning the detection of ground moving targets in dual-channel SAR images, a novel detector based on adjacent average and orthogonal projection is proposed. According to obtaining the component of the sample covariance matrix energy vector that is...
Concerning the detection of ground moving targets in dual-channel SAR images, a novel detector based on adjacent average and orthogonal projection is proposed. According to obtaining the component of the sample covariance matrix energy vector that is...
2009, 31(2): 358-362.
doi: 10.3724/SP.J.1146.2007.01244
Abstract:
Due to the earths rotation or non-sidelooking radar configuration, the spectrum of Space Based Radar (SBR) clutter varies with the range and shows non-stability. The non-stability of clutter will degrade Space Time Adaptive Processing (STAP) performa...
Due to the earths rotation or non-sidelooking radar configuration, the spectrum of Space Based Radar (SBR) clutter varies with the range and shows non-stability. The non-stability of clutter will degrade Space Time Adaptive Processing (STAP) performa...
2009, 31(2): 363-365.
doi: 10.3724/SP.J.1146.2007.01381
Abstract:
Considering the presence of multi-path propagation, it is quite difficult for VHF radar to measure the altitude of a low elevation target. In this paper, a new algorithm is proposed to estimate the DOA of the target, which by using the differential p...
Considering the presence of multi-path propagation, it is quite difficult for VHF radar to measure the altitude of a low elevation target. In this paper, a new algorithm is proposed to estimate the DOA of the target, which by using the differential p...
2009, 31(2): 366-369.
doi: 10.3724/SP.J.1146.2007.01169
Abstract:
The precise motion compensation is a crucial issue for high-resolution airborne SAR imaging, which is especially important for SAR imaging under airborne small platform or severe disturbance. In order to obtain high-quality SAR images, combining wave...
The precise motion compensation is a crucial issue for high-resolution airborne SAR imaging, which is especially important for SAR imaging under airborne small platform or severe disturbance. In order to obtain high-quality SAR images, combining wave...
2009, 31(2): 370-373.
doi: 10.3724/SP.J.1146.2007.01316
Abstract:
In this paper, the performance of several China GMTI systems is briefly introduced at first. After that, a method is prompted based on CSI algorithm for air-born three-channels GMTI signal processing. The processing diagram of this method is given, t...
In this paper, the performance of several China GMTI systems is briefly introduced at first. After that, a method is prompted based on CSI algorithm for air-born three-channels GMTI signal processing. The processing diagram of this method is given, t...
2009, 31(2): 374-377.
doi: 10.3724/SP.J.1146.2007.01086
Abstract:
A multi-channel SAR-GMTI technique based on eigen-decomposition of the covariance matrix is proposed. The variation of the sum of small eigenvalues of the covariance matrix is used to detect moving targets. The radial velocity of the moving target is...
A multi-channel SAR-GMTI technique based on eigen-decomposition of the covariance matrix is proposed. The variation of the sum of small eigenvalues of the covariance matrix is used to detect moving targets. The radial velocity of the moving target is...
2009, 31(2): 378-381.
doi: 10.3724/SP.J.1146.2007.01469
Abstract:
The detection performance of spatial diversity Multiple-Input Multiple-Output(MIMO) radar for Swerling I and Swerling II target is analyzed based on coherent pulses. The detection method provides an unified frame for conventional radar and the MIMO r...
The detection performance of spatial diversity Multiple-Input Multiple-Output(MIMO) radar for Swerling I and Swerling II target is analyzed based on coherent pulses. The detection method provides an unified frame for conventional radar and the MIMO r...
2009, 31(2): 382-385.
doi: 10.3724/SP.J.1146.2007.01500
Abstract:
It is important to apply synthetic aperture technique to High Frequency Surface Wave Radar (HFSWR), and thus to implement surface current extraction by a single site, for the sake of reducing observation cost and improving efficiency. However the exi...
It is important to apply synthetic aperture technique to High Frequency Surface Wave Radar (HFSWR), and thus to implement surface current extraction by a single site, for the sake of reducing observation cost and improving efficiency. However the exi...
2009, 31(2): 386-390.
doi: 10.3724/SP.J.1146.2007.01453
Abstract:
This paper describes a new method for matching SAR image and optical image. First, regularizing anisotropic heat diffusion equations is used for segmenting closed-boundary regions in SAR image. After superposing the center of mass of closed-boundary ...
This paper describes a new method for matching SAR image and optical image. First, regularizing anisotropic heat diffusion equations is used for segmenting closed-boundary regions in SAR image. After superposing the center of mass of closed-boundary ...
2009, 31(2): 391-395.
doi: 10.3724/SP.J.1146.2007.01291
Abstract:
Fast DCT (Discrete Cosine Transform) is one of the key issues in H.264, according to the properties of DCT coefficients energy distribution and the characteristics of zigzag scan, one fast DCT algorithm is proposed based on divided subbands. In the a...
Fast DCT (Discrete Cosine Transform) is one of the key issues in H.264, according to the properties of DCT coefficients energy distribution and the characteristics of zigzag scan, one fast DCT algorithm is proposed based on divided subbands. In the a...
2009, 31(2): 396-399.
doi: 10.3724/SP.J.1146.2007.01446
Abstract:
In multiuser space-time coding system the research already made is almost focused on STTC and STBC scheme. For this reason, a multiuser space-time coding system combined with Turbo-BLAST scheme is proposed. The conventional iterative receiver with Sy...
In multiuser space-time coding system the research already made is almost focused on STTC and STBC scheme. For this reason, a multiuser space-time coding system combined with Turbo-BLAST scheme is proposed. The conventional iterative receiver with Sy...
2009, 31(2): 400-404.
doi: 10.3724/SP.J.1146.2007.01330
Abstract:
An improved method is proposed for noise reduction of chaotic time series based on the reconstruction of phase space theory. Recursive map is firstly used for the chaos characteristics analysis of the time series observed, then the conditions of nonl...
An improved method is proposed for noise reduction of chaotic time series based on the reconstruction of phase space theory. Recursive map is firstly used for the chaos characteristics analysis of the time series observed, then the conditions of nonl...
2009, 31(2): 405-409.
doi: 10.3724/SP.J.1146.2007.01461
Abstract:
An iterative linear transceiver design scheme under Sum Mean Squared Error (SMSE) minimization criterion is proposed. By modifying the structure of transceiver, the complex computation of Lagrangian multiplier within traditional MMSE transceiver desi...
An iterative linear transceiver design scheme under Sum Mean Squared Error (SMSE) minimization criterion is proposed. By modifying the structure of transceiver, the complex computation of Lagrangian multiplier within traditional MMSE transceiver desi...
2009, 31(2): 410-413.
doi: 10.3724/SP.J.1146.2007.01326
Abstract:
The higher complexity and the less number of the joint estimation interfering users are the main disadvantages of the high accuracy joint multi-cell channel estimation algorithm. A strong paths selection based joint channel estimation algorithm is pr...
The higher complexity and the less number of the joint estimation interfering users are the main disadvantages of the high accuracy joint multi-cell channel estimation algorithm. A strong paths selection based joint channel estimation algorithm is pr...
2009, 31(2): 414-417.
doi: 10.3724/SP.J.1146.2007.01549
Abstract:
The behavior of the probability density function of the harmonic mean of two independent distributed non-negative random variables at the origin is analyzed. This result is then applied to study the performance of selection amplify-and-forward cooper...
The behavior of the probability density function of the harmonic mean of two independent distributed non-negative random variables at the origin is analyzed. This result is then applied to study the performance of selection amplify-and-forward cooper...
2009, 31(2): 418-421.
doi: 10.3724/SP.J.1146.2007.01325
Abstract:
High efficiency modulation and demodulation techniques are significant for data transmission. Based on present EBPSK transmission system, a kind of demodulation method that employs a second-order PLL with its PD output structure is discussed in the p...
High efficiency modulation and demodulation techniques are significant for data transmission. Based on present EBPSK transmission system, a kind of demodulation method that employs a second-order PLL with its PD output structure is discussed in the p...
2009, 31(2): 422-425.
doi: 10.3724/SP.J.1146.2007.01251
Abstract:
Blind despread of multi-sequence Direct Sequence Spread Spectrum signals (tamed DSSS signals) with unknown spreading codes are discussed in this paper. The Dominant Mode DeSpreading (DMDS) algorithm is certified to be a successful solution for the bl...
Blind despread of multi-sequence Direct Sequence Spread Spectrum signals (tamed DSSS signals) with unknown spreading codes are discussed in this paper. The Dominant Mode DeSpreading (DMDS) algorithm is certified to be a successful solution for the bl...
2009, 31(2): 426-429.
doi: 10.3724/SP.J.1146.2007.01588
Abstract:
In this paper, the impact of channel estimation error on the performance of multiuser Multiple-Input Multiple-Output (MIMO) transmission based on limited feedback information is analyzed. For zero-forcing beamforming without multiuser scheduling, a s...
In this paper, the impact of channel estimation error on the performance of multiuser Multiple-Input Multiple-Output (MIMO) transmission based on limited feedback information is analyzed. For zero-forcing beamforming without multiuser scheduling, a s...
2009, 31(2): 430-434.
doi: 10.3724/SP.J.1146.2007.01340
Abstract:
To settle the problems existing in AVQ algorithm and to further improve the performance of system stability and anti-jamming, a novel adaptive virtual queue algorithm is proposed, termed PID-AVQ, which added integral control function to PD-AVQ algori...
To settle the problems existing in AVQ algorithm and to further improve the performance of system stability and anti-jamming, a novel adaptive virtual queue algorithm is proposed, termed PID-AVQ, which added integral control function to PD-AVQ algori...
2009, 31(2): 435-438.
doi: 10.3724/SP.J.1146.2007.01276
Abstract:
Some properties of autocorrelation coefficient and cross-correlation coefficient are given. The restricted relationship among n(n variables, wt(f) (the Hamming weight of Boolean function f (x) and t (t-th propagation criteria) was derived, then a low...
Some properties of autocorrelation coefficient and cross-correlation coefficient are given. The restricted relationship among n(n variables, wt(f) (the Hamming weight of Boolean function f (x) and t (t-th propagation criteria) was derived, then a low...
2009, 31(2): 439-443.
doi: 10.3724/SP.J.1146.2007.01240
Abstract:
The existing security protocols for RFID based on LPN problem are systematically analyzed and their secure vulnerabilities are summarized. In order to conquer these security leaks, a new RFID security protocol named HB# is designed, which is an impro...
The existing security protocols for RFID based on LPN problem are systematically analyzed and their secure vulnerabilities are summarized. In order to conquer these security leaks, a new RFID security protocol named HB# is designed, which is an impro...
2009, 31(2): 444-447.
doi: 10.3724/SP.J.1146.2007.01356
Abstract:
Based on PCL, a formal correctness proof of WAPI key management protocol is presented. First, unicast key negotiation and multicast key announcement sub-protocols are analyzed, and their separate proofs of specific security properties of SSA and KS a...
Based on PCL, a formal correctness proof of WAPI key management protocol is presented. First, unicast key negotiation and multicast key announcement sub-protocols are analyzed, and their separate proofs of specific security properties of SSA and KS a...
2009, 31(2): 448-452.
doi: 10.3724/SP.J.1146.2007.01264
Abstract:
Since the proposed ring signatures has the key exposure problem, a new forward-secure ring signature scheme based on bilinear pairings is proposed. Forward security of the scheme means that even if the secret key of current time period is compromised...
Since the proposed ring signatures has the key exposure problem, a new forward-secure ring signature scheme based on bilinear pairings is proposed. Forward security of the scheme means that even if the secret key of current time period is compromised...
2009, 31(2): 453-456.
doi: 10.3724/SP.J.1146.2007.01586
Abstract:
This paper presents the reconfigurable clustered architecture of block cipher processor. Appointed by instructions, the data-path of this architecture can be dynamically configured to be three modes, which includes 4clusters, 2clusters and single clu...
This paper presents the reconfigurable clustered architecture of block cipher processor. Appointed by instructions, the data-path of this architecture can be dynamically configured to be three modes, which includes 4clusters, 2clusters and single clu...
2009, 31(2): 457-461.
doi: 10.3724/SP.J.1146.2007.01384
Abstract:
In order to improve the capacity of wireless Ad hoc networks and satisfy the QoS requirements of multimedia sessions, multi-radio technique is introduced and stateless QoS model in single-interface single-channelSWAN is extended to stateless QoS mode...
In order to improve the capacity of wireless Ad hoc networks and satisfy the QoS requirements of multimedia sessions, multi-radio technique is introduced and stateless QoS model in single-interface single-channelSWAN is extended to stateless QoS mode...
2009, 31(2): 462-466.
doi: 10.3724/SP.J.1146.2007.01263
Abstract:
As a classical Active Queue Management (AQM) algorithm, compared with RED (Random Early Detection), BLUE has many advantages. BLUE uses packet loss and link idle events to manage congestion. However, there are still some insufficiencies in parameter ...
As a classical Active Queue Management (AQM) algorithm, compared with RED (Random Early Detection), BLUE has many advantages. BLUE uses packet loss and link idle events to manage congestion. However, there are still some insufficiencies in parameter ...
2009, 31(2): 467-471.
doi: 10.3724/SP.J.1146.2007.00891
Abstract:
Flow-awareness based priority fairness scheduling scheme will perform distinct forwarding policy dynamically for different traffic flows to adapt the network change and enhance the fairness of scheduling. The fuzzy flow-awareness with the load state ...
Flow-awareness based priority fairness scheduling scheme will perform distinct forwarding policy dynamically for different traffic flows to adapt the network change and enhance the fairness of scheduling. The fuzzy flow-awareness with the load state ...
2009, 31(2): 472-475.
doi: 10.3724/SP.J.1146.2007.01454
Abstract:
DTN(Delay-Tolerant Network) describes the situation in which longtime partition often happens. DTN doesnt assume the existence of End-to-End path, so it focuses on successful delivery ratio of packets. Nodes mobility model such as group, is an attrac...
DTN(Delay-Tolerant Network) describes the situation in which longtime partition often happens. DTN doesnt assume the existence of End-to-End path, so it focuses on successful delivery ratio of packets. Nodes mobility model such as group, is an attrac...
2009, 31(2): 476-479.
doi: 10.3724/SP.J.1146.2007.01584
Abstract:
A multipath dynamic source routing algorithm based on channel resistance is presented. In the algorithm, the concept of channel resistance is defined and used for distributing data flow between different paths. Because the parameters of link quality ...
A multipath dynamic source routing algorithm based on channel resistance is presented. In the algorithm, the concept of channel resistance is defined and used for distributing data flow between different paths. Because the parameters of link quality ...
2009, 31(2): 480-483.
doi: 10.3724/SP.J.1146.2007.01351
Abstract:
The Dual-band technique based on Composite Right/Left Handed (CRLH) Transmission Lines (TLs) is improved in this paper. By properly choosing the parameters of the CRLH-TLs, the structure will yield electrical length and at the two operating frequenci...
The Dual-band technique based on Composite Right/Left Handed (CRLH) Transmission Lines (TLs) is improved in this paper. By properly choosing the parameters of the CRLH-TLs, the structure will yield electrical length and at the two operating frequenci...
2009, 31(2): 484-488.
doi: 10.3724/SP.J.1146.2007.01279
Abstract:
This paper proposes the architecture of an adaptive Reed-Solomon (RS) decoder. This adaptive decoder can decode shorten RS code with variable block length as well as variable message length. The proposed RS decoder is independent of the interval of c...
This paper proposes the architecture of an adaptive Reed-Solomon (RS) decoder. This adaptive decoder can decode shorten RS code with variable block length as well as variable message length. The proposed RS decoder is independent of the interval of c...
2009, 31(2): 497-500.
doi: 10.3724/SP.J.1146.2007.01415
Abstract:
This paper first introduces a DWT-based noise reduction algorithm, which phase noise model and processing flow is discussed in detail. By using the Static Wavelet Transform (SWT), an amelioration of this algorithm and simulation of both algorithms ar...
This paper first introduces a DWT-based noise reduction algorithm, which phase noise model and processing flow is discussed in detail. By using the Static Wavelet Transform (SWT), an amelioration of this algorithm and simulation of both algorithms ar...
2009, 31(2): 501-504.
doi: 10.3724/SP.J.1146.2007.01327
Abstract:
Distributed small satellite SAR can overcome the traditional contradiction of swath and azimuth resolution. In this paper, an algorithm to achieve both two dimensional high resolution and wide swath is proposed. Every small satellite work in the acti...
Distributed small satellite SAR can overcome the traditional contradiction of swath and azimuth resolution. In this paper, an algorithm to achieve both two dimensional high resolution and wide swath is proposed. Every small satellite work in the acti...
2009, 31(2): 505-508.
doi: 10.3724/SP.J.1146.2007.01437
Abstract:
In the video decoder for AVS, deblocking filter becomes one of the bottom necks for real-time processing. An implement architecture for deblocking filter is proposed in this paper. With a novel filtering order, the unfiltered data storage is reduced ...
In the video decoder for AVS, deblocking filter becomes one of the bottom necks for real-time processing. An implement architecture for deblocking filter is proposed in this paper. With a novel filtering order, the unfiltered data storage is reduced ...
2009, 31(2): 489-492.
doi: 10.3724/SP.J.1146.2007.01585
Abstract:
The notion of Universal Designated Verifier Signature (UDVS) allows any holder of a signature to convince any designated verifier that the signer indeed generated the signature without revealing the signature itself, while the verifier can not transf...
The notion of Universal Designated Verifier Signature (UDVS) allows any holder of a signature to convince any designated verifier that the signer indeed generated the signature without revealing the signature itself, while the verifier can not transf...
2009, 31(2): 493-496.
doi: 10.3724/SP.J.1146.2007.01338
Abstract:
Through the cryptanalysis of three blind proxy multi-signature schemes, it shows that in Li Yuan et al.s scheme, any original signer can sign a valid blind proxy multi-signature by the means of forging proxy key, and in Kang Li et al.s first type bli...
Through the cryptanalysis of three blind proxy multi-signature schemes, it shows that in Li Yuan et al.s scheme, any original signer can sign a valid blind proxy multi-signature by the means of forging proxy key, and in Kang Li et al.s first type bli...
