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2009 Vol. 31, No. 6
Display Method:
2009, 31(6): 1271-1274.
doi: 10.3724/SP.J.1146.2008.00660
Abstract:
The request for efficient compression of hyperspectral images becomes pressing. A cluster-based lossless compression algorithm for hyperspectral images is presented. Because the spectral correlation differs in different bands, spectral band grouping ...
The request for efficient compression of hyperspectral images becomes pressing. A cluster-based lossless compression algorithm for hyperspectral images is presented. Because the spectral correlation differs in different bands, spectral band grouping ...
2009, 31(6): 1275-1278.
doi: 10.3724/SP.J.1146.2008.00576
Abstract:
Different inside regions of harbors show different shapes from remote sensing images. A method of harbor target recognition based on inside region is proposed. Firstly, potential sea regions are segmented from image by using histogram and dilation op...
Different inside regions of harbors show different shapes from remote sensing images. A method of harbor target recognition based on inside region is proposed. Firstly, potential sea regions are segmented from image by using histogram and dilation op...
2009, 31(6): 1279-1282.
doi: 10.3724/SP.J.1146.2008.00896
Abstract:
A linear feature extraction algorithm for Synthetic Aperture Radar (SAR) image is proposed, which is based on the low signal-to-noise quality of SAR image. Firstly, a new edge detector, which fuses the Canny operator and Ratio Of Average (ROA) operat...
A linear feature extraction algorithm for Synthetic Aperture Radar (SAR) image is proposed, which is based on the low signal-to-noise quality of SAR image. Firstly, a new edge detector, which fuses the Canny operator and Ratio Of Average (ROA) operat...
2009, 31(6): 1283-1287.
doi: 10.3724/SP.J.1146.2008.00514
Abstract:
A new method for detection of maneuvering target in wideband signal and for estimation of its moving parameters is proposed. Firstly the adjacent correlation is employed to decrease the order of the echo signal. Then the signal is transformed into ra...
A new method for detection of maneuvering target in wideband signal and for estimation of its moving parameters is proposed. Firstly the adjacent correlation is employed to decrease the order of the echo signal. Then the signal is transformed into ra...
2009, 31(6): 1288-1291.
doi: 10.3724/SP.J.1146.2008.00777
Abstract:
By the method of stationary phase and the concept of HQBA (Half Quasi-Bistatic Angle), an exact two-dimensional spectrum of translational-invariant bistatic SAR is derived in this paper. Based on the analysis of every exponential term in the expanded...
By the method of stationary phase and the concept of HQBA (Half Quasi-Bistatic Angle), an exact two-dimensional spectrum of translational-invariant bistatic SAR is derived in this paper. Based on the analysis of every exponential term in the expanded...
2009, 31(6): 1292-1297.
doi: 10.3724/SP.J.1146.2008.00515
Abstract:
Since the small Radar Cross Section (RCS) and complicated buried environments of shallow buried targets will lead to large numbers of false alarms in the detection results of single frame image, a novel detection method called as prescreening-alterna...
Since the small Radar Cross Section (RCS) and complicated buried environments of shallow buried targets will lead to large numbers of false alarms in the detection results of single frame image, a novel detection method called as prescreening-alterna...
2009, 31(6): 1298-1300.
doi: 10.3724/SP.J.1146.2008.00876
Abstract:
The echo signal model of MultiCarrier Modulated radar system based on OFDM (OFDM-MCM) is introduced firstly, the expression of the match filtering output is deduced based on it, and the detection probability is analyzed, then simulation of the Integr...
The echo signal model of MultiCarrier Modulated radar system based on OFDM (OFDM-MCM) is introduced firstly, the expression of the match filtering output is deduced based on it, and the detection probability is analyzed, then simulation of the Integr...
2009, 31(6): 1301-1304.
doi: 10.3724/SP.J.1146.2008.00782
Abstract:
In the application of distributed-satellite Along-Track InterferometrySAR (ATI-SAR) for Ground Moving Target Indication (GMTI), measurement error of baseline will affect the systems GMTI performance. This paper analyzes the satellite clusters actual ...
In the application of distributed-satellite Along-Track InterferometrySAR (ATI-SAR) for Ground Moving Target Indication (GMTI), measurement error of baseline will affect the systems GMTI performance. This paper analyzes the satellite clusters actual ...
2009, 31(6): 1305-1309.
doi: 10.3724/SP.J.1146.2008.00516
Abstract:
Multi-channel SAR system can avoid the minimum antenna area constraint, thus achieving wide swath and high resolution SAR image. There are more deleterious factors in multi-channel SAR system compared with single-channel SAR system, which may degrade...
Multi-channel SAR system can avoid the minimum antenna area constraint, thus achieving wide swath and high resolution SAR image. There are more deleterious factors in multi-channel SAR system compared with single-channel SAR system, which may degrade...
2009, 31(6): 1310-1314.
doi: 10.3724/SP.J.1146.2008.00490
Abstract:
For the needs of precision-guided striking task and to develop an image compression and translation system which based on man-in-loop SAR, a general task-drive intelligent and fast detection framework of SAR images is proposed according to the same c...
For the needs of precision-guided striking task and to develop an image compression and translation system which based on man-in-loop SAR, a general task-drive intelligent and fast detection framework of SAR images is proposed according to the same c...
2009, 31(6): 1315-1318.
doi: 10.3724/SP.J.1146.2008.00520
Abstract:
This paper studies the problem of signal detection in clutter with unknown statistical properties for the airborne MIMO radars. Firstly, a Generalized Likelihood Ratio Test Detector (GLRTD) is proposed to improve the detection performance exploiting ...
This paper studies the problem of signal detection in clutter with unknown statistical properties for the airborne MIMO radars. Firstly, a Generalized Likelihood Ratio Test Detector (GLRTD) is proposed to improve the detection performance exploiting ...
2009, 31(6): 1319-1322.
doi: 10.3724/SP.J.1146.2008.00632
Abstract:
For solving the problem of texture blurring brought by traditional inpainting method, a regional texture synthesis based inpainting algorithm is proposed. The feature in the adjacent domain of each broken pixel is analyzed for choosing the template, ...
For solving the problem of texture blurring brought by traditional inpainting method, a regional texture synthesis based inpainting algorithm is proposed. The feature in the adjacent domain of each broken pixel is analyzed for choosing the template, ...
2009, 31(6): 1323-1326.
doi: 10.3724/SP.J.1146.2008.00545
Abstract:
In this paper, a new Set Partitioning In Hierarchical Trees(SPIHT) coding algorithm is proposed, which is based on a Mixed Contourlet and Wavelet Transform(MCWT) and a new spatial orientation tree (MCWT-SPIHT). In the proposed image coding algorithm,...
In this paper, a new Set Partitioning In Hierarchical Trees(SPIHT) coding algorithm is proposed, which is based on a Mixed Contourlet and Wavelet Transform(MCWT) and a new spatial orientation tree (MCWT-SPIHT). In the proposed image coding algorithm,...
2009, 31(6): 1327-1331.
doi: 10.3724/SP.J.1146.2008.00580
Abstract:
General histogram equalization technology have two drawbacks, it makes the enhanced image have a higher contrast while improvement of contrast dependents on heavily the distribution of gray frequency. So it often leads to enhance high frequency gray ...
General histogram equalization technology have two drawbacks, it makes the enhanced image have a higher contrast while improvement of contrast dependents on heavily the distribution of gray frequency. So it often leads to enhance high frequency gray ...
2009, 31(6): 1332-1336.
doi: 10.3724/SP.J.1146.2008.00513
Abstract:
Directionlet transform can capture the image singularity due to possessing the multi-direction anisotropic basis functions. A texture classification algorithm based on the Mapping complex Directionlet Transform (M-DT) is proposed, which provides bett...
Directionlet transform can capture the image singularity due to possessing the multi-direction anisotropic basis functions. A texture classification algorithm based on the Mapping complex Directionlet Transform (M-DT) is proposed, which provides bett...
2009, 31(6): 1337-1340.
doi: 10.3724/SP.J.1146.2008.01451
Abstract:
A new fast stereo edge-matching algorithm based on mountain images is presented. In order to ensure the accuracy of the match. Firstly the disparity gradient restriction across the direction of epipolar lines is used, and then on the basis of exclusi...
A new fast stereo edge-matching algorithm based on mountain images is presented. In order to ensure the accuracy of the match. Firstly the disparity gradient restriction across the direction of epipolar lines is used, and then on the basis of exclusi...
2009, 31(6): 1341-1344.
doi: 10.3724/SP.J.1146.2008.00907
Abstract:
Based on the audio amplitude distribution change caused by secret message embedding in different bit-planes, a method of secret message length estimation is presented in this paper. This method can not only discriminate the existence of secret messag...
Based on the audio amplitude distribution change caused by secret message embedding in different bit-planes, a method of secret message length estimation is presented in this paper. This method can not only discriminate the existence of secret messag...
2009, 31(6): 1345-1349.
doi: 10.3724/SP.J.1146.2008.01105
Abstract:
Dempster rule of combination is a useful fusion operator for decision level recognition fusion. The effective application of this rule depends on the rational construction of corresponding basic belief assignment. Considering the measurement informat...
Dempster rule of combination is a useful fusion operator for decision level recognition fusion. The effective application of this rule depends on the rational construction of corresponding basic belief assignment. Considering the measurement informat...
2009, 31(6): 1350-1353.
doi: 10.3724/SP.J.1146.2008.01358
Abstract:
cDNA microarray expression data is widely used to help biomedical research. There are so many challenges when the computer and pattern recognition methods are used to process and analysis the data. In this paper, a novel hybrid cross-phenotype normal...
cDNA microarray expression data is widely used to help biomedical research. There are so many challenges when the computer and pattern recognition methods are used to process and analysis the data. In this paper, a novel hybrid cross-phenotype normal...
2009, 31(6): 1354-1358.
doi: 10.3724/SP.J.1146.2008.00496
Abstract:
Traditional AAM (Active Appearance Models) improved methods on human facial features localization always concentrate on fitting efficiency without any concrete analysis of characteristic of the initial position and model instance, thus the location a...
Traditional AAM (Active Appearance Models) improved methods on human facial features localization always concentrate on fitting efficiency without any concrete analysis of characteristic of the initial position and model instance, thus the location a...
2009, 31(6): 1359-1362.
doi: 10.3724/SP.J.1146.2008.00689
Abstract:
A novel Shuffled Particle-Pair Optimizer (SPPO) is proposed for speaker recognition based on vector quantization, which combines the advantage both in Particle Swarm Optimization (PSO) and Shuffled Frog-Leaping Algorithm (SFLA). The SPPO contains ele...
A novel Shuffled Particle-Pair Optimizer (SPPO) is proposed for speaker recognition based on vector quantization, which combines the advantage both in Particle Swarm Optimization (PSO) and Shuffled Frog-Leaping Algorithm (SFLA). The SPPO contains ele...
2009, 31(6): 1363-1366.
doi: 10.3724/SP.J.1146.2008.00909
Abstract:
The algorithm based on quadratic phase function is efficient to estimate the parameters of the LFM signals. When it is dealing with the multi-comment LFM signals, spurious peaks arise and interference is severe. A new approach based on integrated qua...
The algorithm based on quadratic phase function is efficient to estimate the parameters of the LFM signals. When it is dealing with the multi-comment LFM signals, spurious peaks arise and interference is severe. A new approach based on integrated qua...
2009, 31(6): 1367-1370.
doi: 10.3724/SP.J.1146.2008.00671
Abstract:
The active arrays can extend the virtual aperture greatly by transmitting orthogonal signals, and degrees of freedom are increased exponentially. In this paper, By transmitting orthogonal signals , virtual subarrays are designed, and the Virtual Suba...
The active arrays can extend the virtual aperture greatly by transmitting orthogonal signals, and degrees of freedom are increased exponentially. In this paper, By transmitting orthogonal signals , virtual subarrays are designed, and the Virtual Suba...
2009, 31(6): 1371-1375.
doi: 10.3724/SP.J.1146.2008.00785
Abstract:
A novel blind channel estimator based on computing Roots of Matrices (RM) is proposed for OFDM systems. This algorithm exploits the finite alphabet property of information symbols and implements channel deconvolution by computing the Jth principle ro...
A novel blind channel estimator based on computing Roots of Matrices (RM) is proposed for OFDM systems. This algorithm exploits the finite alphabet property of information symbols and implements channel deconvolution by computing the Jth principle ro...
2009, 31(6): 1376-1380.
doi: 10.3724/SP.J.1146.2008.00741
Abstract:
Focusing on the problem that the orthogonality of Orthogonal Space-Time Block Codes (OSTBC) in frequency-selective fading channels is destroyed, a novel decoding scheme based on interference cancellation is proposed. This scheme adopts interference c...
Focusing on the problem that the orthogonality of Orthogonal Space-Time Block Codes (OSTBC) in frequency-selective fading channels is destroyed, a novel decoding scheme based on interference cancellation is proposed. This scheme adopts interference c...
2009, 31(6): 1381-1385.
doi: 10.3724/SP.J.1146.2008.00473
Abstract:
It is often desired to widen the interference null width to enhance the robustness of the algorithm in some real anti-jamming environments. A novel space-time adaptive processing algorithm which broadens the null width is proposed in this paper. The ...
It is often desired to widen the interference null width to enhance the robustness of the algorithm in some real anti-jamming environments. A novel space-time adaptive processing algorithm which broadens the null width is proposed in this paper. The ...
2009, 31(6): 1386-1389.
doi: 10.3724/SP.J.1146.2008.00798
Abstract:
A modified EXtrinsic Information Transfer chart (EXIT chart) method is proposed. This EXIT chart is adopted as a tool to analyze the convergence behavior and to predict the performance of turbo equalization in additive non-Gaussian impulsive noise ch...
A modified EXtrinsic Information Transfer chart (EXIT chart) method is proposed. This EXIT chart is adopted as a tool to analyze the convergence behavior and to predict the performance of turbo equalization in additive non-Gaussian impulsive noise ch...
2009, 31(6): 1390-1394.
doi: 10.3724/SP.J.1146.2008.00787
Abstract:
In OFDM systems，the channel fast variations destroy the orthogonality among sub-carriers, resulting in inter-carrier interference (ICI) which degrades the system performance. Aiming at time-varying characteristic of doubly-selective channels, a chann...
In OFDM systems，the channel fast variations destroy the orthogonality among sub-carriers, resulting in inter-carrier interference (ICI) which degrades the system performance. Aiming at time-varying characteristic of doubly-selective channels, a chann...
2009, 31(6): 1395-1399.
doi: 10.3724/SP.J.1146.2008.00836
Abstract:
A new adaptive anti-collision algorithm based on binary-tree disassembly is proposed in this paper. In order to enhance the search efficiency, a big and complex binary-tree is disassembled to several small and simple binary-trees by estimating the di...
A new adaptive anti-collision algorithm based on binary-tree disassembly is proposed in this paper. In order to enhance the search efficiency, a big and complex binary-tree is disassembled to several small and simple binary-trees by estimating the di...
2009, 31(6): 1400-1404.
doi: 10.3724/SP.J.1146.2008.01038
Abstract:
In DS-CDMA systems with Successive Interference Cancellation (SIC), the numbers of possible rate modes and decoding orders grow exponentially with the number of users. How to allocate rates in order to maximize the system utility is an NP problem, wh...
In DS-CDMA systems with Successive Interference Cancellation (SIC), the numbers of possible rate modes and decoding orders grow exponentially with the number of users. How to allocate rates in order to maximize the system utility is an NP problem, wh...
2009, 31(6): 1405-1409.
doi: 10.3724/SP.J.1146.2007.01018
Abstract:
The probability distribution of radio wave that undergoes certain number of collisions at a specific spatial location should be solved. This probability is used to model radio propagation channels with the method of stochastic rays. The maximum entro...
The probability distribution of radio wave that undergoes certain number of collisions at a specific spatial location should be solved. This probability is used to model radio propagation channels with the method of stochastic rays. The maximum entro...
2009, 31(6): 1410-1414.
doi: 10.3724/SP.J.1146.2008.00975
Abstract:
Utilizing the Householder transformation, and combining with the WY representation, a Modified Householder QR-Decomposition (M-H-QRD) algorithm is proposed firstly. In contrast to the sorted QRD (S-QRD) detection algorithm, the M-H-QRD detection algo...
Utilizing the Householder transformation, and combining with the WY representation, a Modified Householder QR-Decomposition (M-H-QRD) algorithm is proposed firstly. In contrast to the sorted QRD (S-QRD) detection algorithm, the M-H-QRD detection algo...
2009, 31(6): 1415-1419.
doi: 10.3724/SP.J.1146.2008.00858
Abstract:
The performance of distributed space-time code can be severely degraded due to timing offsets among relay nodes. Focusing on this problem, an Asynchronous Distributed Linear Convolutional Space-Time Code (ADLC-STC) is proposed in this paper. By desig...
The performance of distributed space-time code can be severely degraded due to timing offsets among relay nodes. Focusing on this problem, an Asynchronous Distributed Linear Convolutional Space-Time Code (ADLC-STC) is proposed in this paper. By desig...
2009, 31(6): 1420-1423.
doi: 10.3724/SP.J.1146.2008.00747
Abstract:
An improved algorithm based on the bi-directional M-BCJR algorithm for V-BLAST in the frequency selective channel is proposed in this paper. The improved algorithm improves the performance of the bi-directional M-BCJR algorithm with little complexity...
An improved algorithm based on the bi-directional M-BCJR algorithm for V-BLAST in the frequency selective channel is proposed in this paper. The improved algorithm improves the performance of the bi-directional M-BCJR algorithm with little complexity...
2009, 31(6): 1424-1428.
doi: 10.3724/SP.J.1146.2008.00611
Abstract:
A Block-Level Space-Time Block Code (BL-STBC) is firstly proposed for Multi-User Multiple-Input Multiple-Output Single-Carrier Frequency Division Multiple Access (MU-MIMO SC-FDMA) systems. Next, employing the algebraic properties of the BL-STBC and a...
A Block-Level Space-Time Block Code (BL-STBC) is firstly proposed for Multi-User Multiple-Input Multiple-Output Single-Carrier Frequency Division Multiple Access (MU-MIMO SC-FDMA) systems. Next, employing the algebraic properties of the BL-STBC and a...
2009, 31(6): 1429-1432.
doi: 10.3724/SP.J.1146.2008.00902
Abstract:
In order to improve satellite switching performance, a new scheduling algorithm is proposed. Based on Crossbar switch fabric，the algorithm adopts serial scheduling strategy and adjusts the output port arbitrating strategy for the better equity of eve...
In order to improve satellite switching performance, a new scheduling algorithm is proposed. Based on Crossbar switch fabric，the algorithm adopts serial scheduling strategy and adjusts the output port arbitrating strategy for the better equity of eve...
2009, 31(6): 1433-1437.
doi: 10.3724/SP.J.1146.2008.00670
Abstract:
This paper discusses the cryptographic properties of Multi-output plateaued functions, the relationship among difference, Walsh spectra and the order of Multi-output plateaued functions is established. The Walsh spectra distribution of Multi-output p...
This paper discusses the cryptographic properties of Multi-output plateaued functions, the relationship among difference, Walsh spectra and the order of Multi-output plateaued functions is established. The Walsh spectra distribution of Multi-output p...
2009, 31(6): 1438-1441.
doi: 10.3724/SP.J.1146.2008.00528
Abstract:
Orthomorphic permutations have important application in the design of cryptosystems. Based on the one-to-one corresponding relationship between orthomorphic permutations and transversals of orthomorphic Latin square, the construction issue for orthom...
Orthomorphic permutations have important application in the design of cryptosystems. Based on the one-to-one corresponding relationship between orthomorphic permutations and transversals of orthomorphic Latin square, the construction issue for orthom...
2009, 31(6): 1442-1444.
doi: 10.3724/SP.J.1146.2008.00736
Abstract:
Based on two different chaotic systems synchronization and parameter modulation, a novel method of realizing chaotic secure communication is proposed in this paper. Information signals are used to modulate some parameter of a chaotic system in the se...
Based on two different chaotic systems synchronization and parameter modulation, a novel method of realizing chaotic secure communication is proposed in this paper. Information signals are used to modulate some parameter of a chaotic system in the se...
2009, 31(6): 1445-1450.
doi: 10.3724/SP.J.1146.2008.00162
Abstract:
Electronic payment protocol is a kind of important electronic commerce protocol, and fairness is one of the desirable secure properties payment protocols should achieve. A new approach based on Hierarchical Timed Coloured Petri Nets (HTCPN) for model...
Electronic payment protocol is a kind of important electronic commerce protocol, and fairness is one of the desirable secure properties payment protocols should achieve. A new approach based on Hierarchical Timed Coloured Petri Nets (HTCPN) for model...
2009, 31(6): 1451-1454.
doi: 10.3724/SP.J.1146.2007.01483
Abstract:
To circumvent the transmission performance degradation of Orthogonal Frequency Division Multiplexing (OFDM) systems due to the nonlinear HPA, a new predistorter is presented to predistort HPA which consists of two similar single-input and single-outp...
To circumvent the transmission performance degradation of Orthogonal Frequency Division Multiplexing (OFDM) systems due to the nonlinear HPA, a new predistorter is presented to predistort HPA which consists of two similar single-input and single-outp...
2009, 31(6): 1455-1459.
doi: 10.3724/SP.J.1146.2008.00713
Abstract:
A feedback-based Adaptive Reference Picture Selection (ARPS) is proposed for improving error resilience in real-time video transmission. The novel predictive structure which the reference picture selection can be optimized with rate-distortion method...
A feedback-based Adaptive Reference Picture Selection (ARPS) is proposed for improving error resilience in real-time video transmission. The novel predictive structure which the reference picture selection can be optimized with rate-distortion method...
2009, 31(6): 1460-1464.
doi: 10.3724/SP.J.1146.2008.00554
Abstract:
As the broadcasting networks have no feed back channel, the sender has no idea about the packets loss during the packets are transmitted. Signals may reduce and the Probability of Packet Loss (PPL) increases, when the terminals are on the edge of the...
As the broadcasting networks have no feed back channel, the sender has no idea about the packets loss during the packets are transmitted. Signals may reduce and the Probability of Packet Loss (PPL) increases, when the terminals are on the edge of the...
2009, 31(6): 1465-1469.
doi: 10.3724/SP.J.1146.2007.01144
Abstract:
This paper introduces the concept of time-frequency channels into multi-radio multi-channel 802.11 wireless mesh networks for the first time. Time-frequency channels are gotten by dividing wireless resource from two dimensions: time and frequency. Th...
This paper introduces the concept of time-frequency channels into multi-radio multi-channel 802.11 wireless mesh networks for the first time. Time-frequency channels are gotten by dividing wireless resource from two dimensions: time and frequency. Th...
2009, 31(6): 1470-1474.
doi: 10.3724/SP.J.1146.2008.00590
Abstract:
Multicast based stream scheduling algorithm can reduce server and network bandwidth consumption efficiently. But recent studies have indicated that user VCR interactive operations can severely penalize the scalability of these stream protocols. A new...
Multicast based stream scheduling algorithm can reduce server and network bandwidth consumption efficiently. But recent studies have indicated that user VCR interactive operations can severely penalize the scalability of these stream protocols. A new...
2009, 31(6): 1475-1478.
doi: 10.3724/SP.J.1146.2008.00484
Abstract:
The multiple-plane and multiple-stage (MPMS) switching fabric has attractive scalability features that make it appealing as an alternative for scalable routers. However, scheduling packets in MPMS fabric is complex. In this paper, a novel scheduling ...
The multiple-plane and multiple-stage (MPMS) switching fabric has attractive scalability features that make it appealing as an alternative for scalable routers. However, scheduling packets in MPMS fabric is complex. In this paper, a novel scheduling ...
2009, 31(6): 1479-1482.
doi: 10.3724/SP.J.1146.2008.00538
Abstract:
Aimed to testing interconnect network that includes 3-stage programmable switches in FPGA, this paper proposes a novel size-independent approach based on a matching theory to minimize the number of test configurations. By constructing the graph of st...
Aimed to testing interconnect network that includes 3-stage programmable switches in FPGA, this paper proposes a novel size-independent approach based on a matching theory to minimize the number of test configurations. By constructing the graph of st...
2009, 31(6): 1483-1486.
doi: 10.3724/SP.J.1146.2008.00783
Abstract:
This paper, with the analysis of the propagation characteristics in a lossy cylindrical waveguide and using small-signal theoretical dispersion relation, presents study on the device stability with influence of the absolute instability and the backwa...
This paper, with the analysis of the propagation characteristics in a lossy cylindrical waveguide and using small-signal theoretical dispersion relation, presents study on the device stability with influence of the absolute instability and the backwa...
2009, 31(6): 1487-1489.
doi: 10.3724/SP.J.1146.2008.01115
Abstract:
An ellipse-like UWB dipole is investigated in this paper. By designing a novel antenna structure, which can effectively reduce the current reflection at the end of dipole, the input impedance is improved, and the bandwidth is widened. The dipole is m...
An ellipse-like UWB dipole is investigated in this paper. By designing a novel antenna structure, which can effectively reduce the current reflection at the end of dipole, the input impedance is improved, and the bandwidth is widened. The dipole is m...
2009, 31(6): 1490-1492.
doi: 10.3724/SP.J.1146.2008.00977
Abstract:
For the synthesis of the symmetrical sparse linear arrays with some thinned rate, only taking some elements rounds the end of the aperture into account will have the same effect on the peak side lobe level with taking all the elements into account. U...
For the synthesis of the symmetrical sparse linear arrays with some thinned rate, only taking some elements rounds the end of the aperture into account will have the same effect on the peak side lobe level with taking all the elements into account. U...
2009, 31(6): 1493-1496.
doi: 10.3724/SP.J.1146.2008.01045
Abstract:
The effect of channel estimation error on the performance of Multiple-Input Multiple-Output (MIMO) Zero-Forcing (ZF) receivers in uncorrelated Rayleigh flat fading channels is investigated, and a novel algorithm of power allocation and adaptive modul...
The effect of channel estimation error on the performance of Multiple-Input Multiple-Output (MIMO) Zero-Forcing (ZF) receivers in uncorrelated Rayleigh flat fading channels is investigated, and a novel algorithm of power allocation and adaptive modul...
2009, 31(6): 1497-1500.
doi: 10.3724/SP.J.1146.2008.00843
Abstract:
A significance coding algorithm based on layer model is proposed. Without changing the context template of JPEG2000, the proposed scheme uses an explicit layer template to dynamically arrange the scan path of wavelet coefficients. Experimental result...
A significance coding algorithm based on layer model is proposed. Without changing the context template of JPEG2000, the proposed scheme uses an explicit layer template to dynamically arrange the scan path of wavelet coefficients. Experimental result...
2009, 31(6): 1501-1504.
doi: 10.3724/SP.J.1146.2008.00610
Abstract:
Most fault localization techniques is based on time windows. The size of time windows impacts on the accuracy of the algorithms greatly. This paper takes weighted bipartite graph as fault propagation model and proposes a heuristic fault localization ...
Most fault localization techniques is based on time windows. The size of time windows impacts on the accuracy of the algorithms greatly. This paper takes weighted bipartite graph as fault propagation model and proposes a heuristic fault localization ...
2009, 31(6): 1505-1508.
doi: 10.3724/SP.J.1146.2008.01124
Abstract:
Two handoff queuing schemes of Opportunistic Spectrum Access (OSA) system are proposed for non-real-time services. For each scheme, a two-dimensional Markov chain analysis is presented and the blocking probability, force termination probability and b...
Two handoff queuing schemes of Opportunistic Spectrum Access (OSA) system are proposed for non-real-time services. For each scheme, a two-dimensional Markov chain analysis is presented and the blocking probability, force termination probability and b...
2009, 31(6): 1509-1512.
doi: 10.3724/SP.J.1146.2008.00769
Abstract:
This paper studies the data transmission control with FC-AE-ASM (Fibre Channel-Avionics Environment- Anonymous Subscriber Messaging) network. The periodic task model in real-time communication is adopted. Based on the basic principle of FC-AE-ASM net...
This paper studies the data transmission control with FC-AE-ASM (Fibre Channel-Avionics Environment- Anonymous Subscriber Messaging) network. The periodic task model in real-time communication is adopted. Based on the basic principle of FC-AE-ASM net...
2009, 31(6): 1513-1516.
doi: 10.3724/SP.J.1146.2008.00587
Abstract:
Based on the small-world and power-law characters of P2P, the IPS is proposed to identify the P2P super nodes. IPS adopts packets sampling to identify seed nodes. Then according to the traffic relationship between the P2P nodes, IPS identifies all th...
Based on the small-world and power-law characters of P2P, the IPS is proposed to identify the P2P super nodes. IPS adopts packets sampling to identify seed nodes. Then according to the traffic relationship between the P2P nodes, IPS identifies all th...
2009, 31(6): 1517-1520.
doi: 10.3724/SP.J.1146.2008.00838
Abstract:
Logic gates and QCA wires can be implemented by Quantum-dot Cellular Automata (QCA). In this paper, one bit, four bit and eight bit comparators are designed based on QCA. QCADesigner is used to simulate the circuits. The results show that the propose...
Logic gates and QCA wires can be implemented by Quantum-dot Cellular Automata (QCA). In this paper, one bit, four bit and eight bit comparators are designed based on QCA. QCADesigner is used to simulate the circuits. The results show that the propose...
2009, 31(6): 1521-1524.
doi: 10.3724/SP.J.1146.2008.00553
Abstract:
This paper presents a novel PLL self-calibration scheme based on Frequency-to-Voltage (F2V) Converting technique, which is fast and applicable for the Phase-Locked Loop(PLL) using a multi-band ring Voltage Controlled Oscillator (VCO) in the clock gen...
This paper presents a novel PLL self-calibration scheme based on Frequency-to-Voltage (F2V) Converting technique, which is fast and applicable for the Phase-Locked Loop(PLL) using a multi-band ring Voltage Controlled Oscillator (VCO) in the clock gen...
