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2008 Vol. 30, No. 8
Display Method:
2008, 30(8): 1779-1782.
doi: 10.3724/SP.J.1146.2007.01493
Abstract:
In Orthogonal Frequency Division Multiple Access (OFDMA) systems, utilizing Proportional Fair (PF) algorithm can enhance system capacity, fairness, and performance. PF algorithm is extended, and a quality of service guaranteed packet scheduling algor...
In Orthogonal Frequency Division Multiple Access (OFDMA) systems, utilizing Proportional Fair (PF) algorithm can enhance system capacity, fairness, and performance. PF algorithm is extended, and a quality of service guaranteed packet scheduling algor...
2008, 30(8): 1783-1786.
doi: 10.3724/SP.J.1146.2007.00197
Abstract:
In this paper, a novel QoS-guarantee efficient scheduling and resource allocation algorithm for heterogeneous traffics in the downlink of MIMO-OFDMA system is proposed, which sufficiently exploits the space，time, frequency resource to provide QoS-gua...
In this paper, a novel QoS-guarantee efficient scheduling and resource allocation algorithm for heterogeneous traffics in the downlink of MIMO-OFDMA system is proposed, which sufficiently exploits the space，time, frequency resource to provide QoS-gua...
2008, 30(8): 1787-1790.
doi: 10.3724/SP.J.1146.2007.00122
Abstract:
This paper proposes an iterative Maximum A Posteriori (MAP) probability channel estimation algorithm for MIMO-OFDM systems. The receiver employs the soft systematic bits and soft parity bits of MAP decoding and feeds them back to the channel estimato...
This paper proposes an iterative Maximum A Posteriori (MAP) probability channel estimation algorithm for MIMO-OFDM systems. The receiver employs the soft systematic bits and soft parity bits of MAP decoding and feeds them back to the channel estimato...
2008, 30(8): 1791-1795.
doi: 10.3724/SP.J.1146.2006.01527
Abstract:
It is well known that Space-Time Coded Orthogonal Frequency Division Multiplexing (STC-OFDM) is easy to be affected by the Co-Channel Interference (CCI) and it is effective to mitigate CCI by beamforming. However, the existing methods are based on th...
It is well known that Space-Time Coded Orthogonal Frequency Division Multiplexing (STC-OFDM) is easy to be affected by the Co-Channel Interference (CCI) and it is effective to mitigate CCI by beamforming. However, the existing methods are based on th...
2008, 30(8): 1796-1800.
doi: 10.3724/SP.J.1146.2007.00095
Abstract:
An improved Bayesian EM channel estimator is proposed for MIMO-OFDM systems. Using the candidates list of the List Sphere Decoder (LSD) and a prior information from the decoder, the approximations of the soft decision symbols in the conventional EM c...
An improved Bayesian EM channel estimator is proposed for MIMO-OFDM systems. Using the candidates list of the List Sphere Decoder (LSD) and a prior information from the decoder, the approximations of the soft decision symbols in the conventional EM c...
2008, 30(8): 1801-1805.
doi: 10.3724/SP.J.1146.2007.00178
Abstract:
Some Quadratic Programs (QP) have been presented for the blind channel estimation and signal detection of the time-varying OFDM systems. In this paper a method is proposed to turn the QP problem into the optimization of a Semi-Definite Program (SDP) ...
Some Quadratic Programs (QP) have been presented for the blind channel estimation and signal detection of the time-varying OFDM systems. In this paper a method is proposed to turn the QP problem into the optimization of a Semi-Definite Program (SDP) ...
2008, 30(8): 1806-1809.
doi: 10.3724/SP.J.1146.2006.02070
Abstract:
Frequency Domain Equalization for Single Carrier transmission (SC-FDE) attracted much attention due to its low complexity and performance in suppressing ISI. But SC-FDE usually can not provide soft information for Soft-In Soft-Out (SISO) decoders whi...
Frequency Domain Equalization for Single Carrier transmission (SC-FDE) attracted much attention due to its low complexity and performance in suppressing ISI. But SC-FDE usually can not provide soft information for Soft-In Soft-Out (SISO) decoders whi...
2008, 30(8): 1810-1814.
doi: 10.3724/SP.J.1146.2006.02034
Abstract:
A modulation identification algorithm based on blind channel identification and equalization is proposed for MPSK and MQAM signals in multi-path environments. The channel order is estimated accurately first. Then, the eigenvalue perturbation analysis...
A modulation identification algorithm based on blind channel identification and equalization is proposed for MPSK and MQAM signals in multi-path environments. The channel order is estimated accurately first. Then, the eigenvalue perturbation analysis...
2008, 30(8): 1815-1819.
doi: 10.3724/SP.J.1146.2006.02081
Abstract:
A mechanism is proposed to notify the link layer ARQ retransmission state information to TCP by the cross-layer information exchange. It can avoid the negative effect of delay variation on TCP due to the link layer ARQ retransmission. The perfectly-p...
A mechanism is proposed to notify the link layer ARQ retransmission state information to TCP by the cross-layer information exchange. It can avoid the negative effect of delay variation on TCP due to the link layer ARQ retransmission. The perfectly-p...
2008, 30(8): 1820-1823.
doi: 10.3724/SP.J.1146.2006.02085
Abstract:
In satellite communication systems, some special users which are usually fast-moving terminals may need to be supported as well as the common users sometimes. Since the two types of users exist, the communication performances for both of them should ...
In satellite communication systems, some special users which are usually fast-moving terminals may need to be supported as well as the common users sometimes. Since the two types of users exist, the communication performances for both of them should ...
2008, 30(8): 1824-1827.
doi: 10.3724/SP.J.1146.2006.02054
Abstract:
Chaotic Direct Sequence Spread Spectrum (CD3S) signal is more nonlinear and more complex than the conventional direct sequence spread spectrum signal. This is the merit of CD3S, but also difficulty of estimation of chaotic spread spectrum sequences. ...
Chaotic Direct Sequence Spread Spectrum (CD3S) signal is more nonlinear and more complex than the conventional direct sequence spread spectrum signal. This is the merit of CD3S, but also difficulty of estimation of chaotic spread spectrum sequences. ...
2008, 30(8): 1828-1831.
doi: 10.3724/SP.J.1146.2006.02040
Abstract:
Based on a proposed equivalent model of two concatenated modules, the conventional QRD-M algorithm for MIMO signal detection was studied and an improved QRD-M algorithm was proposed in this paper. Through complexity analysis and numerical simulations...
Based on a proposed equivalent model of two concatenated modules, the conventional QRD-M algorithm for MIMO signal detection was studied and an improved QRD-M algorithm was proposed in this paper. Through complexity analysis and numerical simulations...
2008, 30(8): 1832-1835.
doi: 10.3724/SP.J.1146.2006.02077
Abstract:
In this paper, a novel simplified algorithm with broken line analysis is proposed for the log-likelihood ratio calculation of 16QAM signals. In this novel algorithm several line segments are introduced to approach the LLR curves of 16QAM signals, whi...
In this paper, a novel simplified algorithm with broken line analysis is proposed for the log-likelihood ratio calculation of 16QAM signals. In this novel algorithm several line segments are introduced to approach the LLR curves of 16QAM signals, whi...
2008, 30(8): 1836-1840.
doi: 10.3724/SP.J.1146.2007.00126
Abstract:
Multiple description image coding based on quantized frame expansion performs very well over error-prone channels. In this paper, an efficient multiple description image coding based on frame expansion is proposed. Firstly, an optical uniform tight f...
Multiple description image coding based on quantized frame expansion performs very well over error-prone channels. In this paper, an efficient multiple description image coding based on frame expansion is proposed. Firstly, an optical uniform tight f...
2008, 30(8): 1841-1844.
doi: 10.3724/SP.J.1146.2007.01320
Abstract:
A high-speed data transmission system (Overlapped Time Division Multiplexing System, OvTDM) and its performace are researched in AWGN channel. Simultaneously, the channel coded OvTDM system is researched. The optimal algorithm, which is soft-in soft-...
A high-speed data transmission system (Overlapped Time Division Multiplexing System, OvTDM) and its performace are researched in AWGN channel. Simultaneously, the channel coded OvTDM system is researched. The optimal algorithm, which is soft-in soft-...
2008, 30(8): 1845-1848.
doi: 10.3724/SP.J.1146.2007.01699
Abstract:
In this paper, an improved iterative decoding algorithm based on averaged Log-Likelihood Ratio (LLR) is proposed for LDPC coded BICM systems. The extrinsic information delivered by every BP iteration is averaged and the averaged LLR values are used a...
In this paper, an improved iterative decoding algorithm based on averaged Log-Likelihood Ratio (LLR) is proposed for LDPC coded BICM systems. The extrinsic information delivered by every BP iteration is averaged and the averaged LLR values are used a...
2008, 30(8): 1849-1852.
doi: 10.3724/SP.J.1146.2007.00043
Abstract:
A novel algorithm for denoising the contaminated chaotic signals is proposed, which is based on Particle Filtering (PF), and adapted for low SNR, additive non-Gaussian noise and the chaotic dynamic system with unknown parameters. Basic idea behind th...
A novel algorithm for denoising the contaminated chaotic signals is proposed, which is based on Particle Filtering (PF), and adapted for low SNR, additive non-Gaussian noise and the chaotic dynamic system with unknown parameters. Basic idea behind th...
2008, 30(8): 1853-1856.
doi: 10.3724/SP.J.1146.2007.00133
Abstract:
Aiming at the problem of communication signal blind separation in the noisy circumstance, a Blind Source Separation(BSS)algorithm in the case of noise is presented which combined the robust whitening algorithm and Joint Approximate Diagonalization (J...
Aiming at the problem of communication signal blind separation in the noisy circumstance, a Blind Source Separation(BSS)algorithm in the case of noise is presented which combined the robust whitening algorithm and Joint Approximate Diagonalization (J...
2008, 30(8): 1857-1860.
doi: 10.3724/SP.J.1146.2007.00114
Abstract:
This paper discusses the influence of both quantization and noise upon the estimation results in phase estimation algorithm based on orthogonal transformation. The bias, variance and distribution property of estimated values are provided, the theoret...
This paper discusses the influence of both quantization and noise upon the estimation results in phase estimation algorithm based on orthogonal transformation. The bias, variance and distribution property of estimated values are provided, the theoret...
2008, 30(8): 1861-1864.
doi: 10.3724/SP.J.1146.2007.00066
Abstract:
The efficiency of traditional binary Huffman decoding method is very low. A new decoding method based on octonary Huffman trees is presented in this paper to improve the decoding speed. Huffman codes are represented as an octonary tree and reconstruc...
The efficiency of traditional binary Huffman decoding method is very low. A new decoding method based on octonary Huffman trees is presented in this paper to improve the decoding speed. Huffman codes are represented as an octonary tree and reconstruc...
A Generalized Fuzzy Entropy Thresholding Segmentation Method Based on the Sugeno Complement Operator
2008, 30(8): 1865-1868.
doi: 10.3724/SP.J.1146.2007.00103
Abstract:
For images with bad illumination, the traditional fuzzy entropy thresholding segmentation method can not achieve satisfactory results. In this paper a generalized fuzzy entropy thresholding method based on the Sugeno complement function is presented....
For images with bad illumination, the traditional fuzzy entropy thresholding segmentation method can not achieve satisfactory results. In this paper a generalized fuzzy entropy thresholding method based on the Sugeno complement function is presented....
2008, 30(8): 1869-1873.
doi: 10.3724/SP.J.1146.2006.02059
Abstract:
This paper puts forward a new algorithm for image reducing noise based on the time matrix of Pulse Coupled Neural Networks (PCNN) form the aspect of the characteristic of image impulsive noise. The time matrix is a mapping from spatial image informat...
This paper puts forward a new algorithm for image reducing noise based on the time matrix of Pulse Coupled Neural Networks (PCNN) form the aspect of the characteristic of image impulsive noise. The time matrix is a mapping from spatial image informat...
2008, 30(8): 1874-1877.
doi: 10.3724/SP.J.1146.2006.02098
Abstract:
Performance of anti-noise for the pseudo-random code phase modulation and pulse amplitude modulation combined fuze based on Doppler effect are discussed in this thesis. Firstly, the principle of them are introduced briefly. Secondly, on this basis, t...
Performance of anti-noise for the pseudo-random code phase modulation and pulse amplitude modulation combined fuze based on Doppler effect are discussed in this thesis. Firstly, the principle of them are introduced briefly. Secondly, on this basis, t...
2008, 30(8): 1878-1881.
doi: 10.3724/SP.J.1146.2007.00051
Abstract:
In this paper, a new method is proposed to estimate the DOA of wideband coherent signals. The orthogonality of projected subspaces method is used to estimate DOA. This method does not require the primary information of DOA for focusing matrix and nee...
In this paper, a new method is proposed to estimate the DOA of wideband coherent signals. The orthogonality of projected subspaces method is used to estimate DOA. This method does not require the primary information of DOA for focusing matrix and nee...
2008, 30(8): 1882-1885.
doi: 10.3724/SP.J.1146.2007.01475
Abstract:
The Discrete Fourier Transform (DFT) has circular shift properties. Similarly, the Discrete Chirp- Fourier Transform (DCFT) motivated by DFT also has circular shift properties. This paper introduces the circular shift of DCFT and proposes a new metho...
The Discrete Fourier Transform (DFT) has circular shift properties. Similarly, the Discrete Chirp- Fourier Transform (DCFT) motivated by DFT also has circular shift properties. This paper introduces the circular shift of DCFT and proposes a new metho...
2008, 30(8): 1886-1889.
doi: 10.3724/SP.J.1146.2007.01420
Abstract:
DOA-matrix method is one of eigenstructure-based algorithms dealing with the estimation of the 2-D Direction-Of-Arrival(DOA) for multiple narrowband sources. In this paper, the DOA-matrix subspace method is extended for DOA estimation with an array o...
DOA-matrix method is one of eigenstructure-based algorithms dealing with the estimation of the 2-D Direction-Of-Arrival(DOA) for multiple narrowband sources. In this paper, the DOA-matrix subspace method is extended for DOA estimation with an array o...
2008, 30(8): 1890-1892.
doi: 10.3724/SP.J.1146.2008.00138
Abstract:
In this paper, the twice virtual interpolations is introduced into the circle array receiving signal 2D-DOA separable estimation, twice virtual interpolations are used to get the rotational invariance factor, the factor is used to get the estimation ...
In this paper, the twice virtual interpolations is introduced into the circle array receiving signal 2D-DOA separable estimation, twice virtual interpolations are used to get the rotational invariance factor, the factor is used to get the estimation ...
2008, 30(8): 1893-1896.
doi: 10.3724/SP.J.1146.2007.00955
Abstract:
The iterated estimation of DOA and polarization for completely polarized electromagnetic waves is proposed based on an partly calibrated polarization sensitive array with different type of polarization sensitive antennas, mounted on airframe. The pro...
The iterated estimation of DOA and polarization for completely polarized electromagnetic waves is proposed based on an partly calibrated polarization sensitive array with different type of polarization sensitive antennas, mounted on airframe. The pro...
2008, 30(8): 1897-1900.
doi: 10.3724/SP.J.1146.2006.02035
Abstract:
Dempster-Shafer (D-S) algorithm is improved to fuse different features of multi-temporal SAR images to detect change detection of urban areas. Firstly, Dempster-Shafer is developed by not only considering the certainty of the evidence, but also consi...
Dempster-Shafer (D-S) algorithm is improved to fuse different features of multi-temporal SAR images to detect change detection of urban areas. Firstly, Dempster-Shafer is developed by not only considering the certainty of the evidence, but also consi...
2008, 30(8): 1901-1904.
doi: 10.3724/SP.J.1146.2007.00056
Abstract:
A scheme about multi-sensor data fusion based on adaptive filter is developed for improve tracking precision for moving power-driven target under complicated air-battle environment. At first, optimal weight for sensors are found by measuring data to ...
A scheme about multi-sensor data fusion based on adaptive filter is developed for improve tracking precision for moving power-driven target under complicated air-battle environment. At first, optimal weight for sensors are found by measuring data to ...
2008, 30(8): 1905-1908.
doi: 10.3724/SP.J.1146.2007.01784
Abstract:
In this paper, a new particle filter based on Statistical Linear Regression (SLR) is proposed for the state estimation of non-Gauss nonlinear systems. In the new algorithm, the importance density function of particle filter is generated by linearizin...
In this paper, a new particle filter based on Statistical Linear Regression (SLR) is proposed for the state estimation of non-Gauss nonlinear systems. In the new algorithm, the importance density function of particle filter is generated by linearizin...
2008, 30(8): 1909-1912.
doi: 10.3724/SP.J.1146.2007.00136
Abstract:
By analyzing imaging theories of point target, a preprocessing algorithm of point target detection based on temporal-spatial bilateral filter using adaptive neighborhoods is presented. The algorithm establishes an adaptive neighborhood for the given ...
By analyzing imaging theories of point target, a preprocessing algorithm of point target detection based on temporal-spatial bilateral filter using adaptive neighborhoods is presented. The algorithm establishes an adaptive neighborhood for the given ...
2008, 30(8): 1913-1917.
doi: 10.3724/SP.J.1146.2007.00123
Abstract:
The design of the rough neural network based on variable precision rough set model is studied. The condition of -approximation reduction is generalized and the criteria for selecting a -approximation reduction are introduced. In the experiment of the...
The design of the rough neural network based on variable precision rough set model is studied. The condition of -approximation reduction is generalized and the criteria for selecting a -approximation reduction are introduced. In the experiment of the...
2008, 30(8): 1918-1922.
doi: 10.3724/SP.J.1146.2007.00049
Abstract:
The number of Gaussian component is fixed and correlativity of class label between adjacent pixels is not considered in classical Gaussian mixture background model. As an improved version of the model, the main contribution of this paper is twofold. ...
The number of Gaussian component is fixed and correlativity of class label between adjacent pixels is not considered in classical Gaussian mixture background model. As an improved version of the model, the main contribution of this paper is twofold. ...
2008, 30(8): 1923-1927.
doi: 10.3724/SP.J.1146.2006.02065
Abstract:
A new robust Improved Fuzzy Partitions for K-Plane Clustering (IFP-KPC) algorithm is proposed. The proposed algorithm can reduce the sensitivity of the k-plane clustering algorithm to noises in real datasets. Also the distances to the Voronoi cell ar...
A new robust Improved Fuzzy Partitions for K-Plane Clustering (IFP-KPC) algorithm is proposed. The proposed algorithm can reduce the sensitivity of the k-plane clustering algorithm to noises in real datasets. Also the distances to the Voronoi cell ar...
2008, 30(8): 1928-1931.
doi: 10.3724/SP.J.1146.2007.00010
Abstract:
A Kernel-SOM based unsupervised nonlinear system identification algorithm is proposed. Analysis of the model running convergence of the proposed algorithm is performed, and the convergence theorem is proofed by considering both identification error a...
A Kernel-SOM based unsupervised nonlinear system identification algorithm is proposed. Analysis of the model running convergence of the proposed algorithm is performed, and the convergence theorem is proofed by considering both identification error a...
2008, 30(8): 1932-1935.
doi: 10.3724/SP.J.1146.2007.00130
Abstract:
According to the heteroclinic shilnikov theorem, a kind of piecewise linear chaotic system is presented in this paper. These systems have at least two equilibriums and at each equilibrium they have the same Jacobian. Changing the equilibriums and the...
According to the heteroclinic shilnikov theorem, a kind of piecewise linear chaotic system is presented in this paper. These systems have at least two equilibriums and at each equilibrium they have the same Jacobian. Changing the equilibriums and the...
2008, 30(8): 1936-1939.
doi: 10.3724/SP.J.1146.2007.00047
Abstract:
A previous text steganography scheme uses the mimic function and the Context-Free Grammar (CFG) to generate pseudo-natural language text to convey secret information. However, the generated text usually lacks semantic consistency and is therefore vul...
A previous text steganography scheme uses the mimic function and the Context-Free Grammar (CFG) to generate pseudo-natural language text to convey secret information. However, the generated text usually lacks semantic consistency and is therefore vul...
2008, 30(8): 1940-1943.
doi: 10.3724/SP.J.1146.2007.00054
Abstract:
To effectively suppress speckle noise and preserve structure information of SAR images, a NeighShrink despeckling based on scale space correlation is proposed in this paper. Firstly, for detail subbands of logarithmically transformed SAR images decom...
To effectively suppress speckle noise and preserve structure information of SAR images, a NeighShrink despeckling based on scale space correlation is proposed in this paper. Firstly, for detail subbands of logarithmically transformed SAR images decom...
2008, 30(8): 1944-1948.
doi: 10.3724/SP.J.1146.2007.00115
Abstract:
A new algorithm which can use lacunarity feature to discriminate vehicle target from natural clutter in SAR imagery is developed in this paper. Firstly, the variation and irregularity of back-scattered intensity for vehicle target and natural terrain...
A new algorithm which can use lacunarity feature to discriminate vehicle target from natural clutter in SAR imagery is developed in this paper. Firstly, the variation and irregularity of back-scattered intensity for vehicle target and natural terrain...
2008, 30(8): 1949-1953.
doi: 10.3724/SP.J.1146.2007.00024
Abstract:
Radar High-Resolution Range Profile (HRRP) is very sensitive to time-shift; therefore, HRRP-based Radar Automatic Target Recognition (RATR) requires efficient time-shift invariant features. A new time-shift invariant feature, i.e., amplitude spectrum...
Radar High-Resolution Range Profile (HRRP) is very sensitive to time-shift; therefore, HRRP-based Radar Automatic Target Recognition (RATR) requires efficient time-shift invariant features. A new time-shift invariant feature, i.e., amplitude spectrum...
2008, 30(8): 1954-1958.
doi: 10.3724/SP.J.1146.2006.02080
Abstract:
Interferometry with Space-borne ScanSAR is a wide swath elevation measurement technique. The properties of ScanSAR interferometric signal spectrum and Azimuth Scan Pattern Synchronization are discussed combined with the principle of ScanSAR mode. The...
Interferometry with Space-borne ScanSAR is a wide swath elevation measurement technique. The properties of ScanSAR interferometric signal spectrum and Azimuth Scan Pattern Synchronization are discussed combined with the principle of ScanSAR mode. The...
2008, 30(8): 1959-1962.
doi: 10.3724/SP.J.1146.2007.00063
Abstract:
In HF groundwave shipborne bistatic radar, the movement of radar can make the system more complex. This paper analyses the geometrical change of the mobile bistatic system, and the effect of the geometrical change to the LFMICW signal echo of target,...
In HF groundwave shipborne bistatic radar, the movement of radar can make the system more complex. This paper analyses the geometrical change of the mobile bistatic system, and the effect of the geometrical change to the LFMICW signal echo of target,...
2008, 30(8): 1963-1967.
doi: 10.3724/SP.J.1146.2006.02083
Abstract:
A novel method which is called polarimetric-ESPRIT (P-ESPRIT) algorithm is presented for full-polarization scattering center extraction and parameter estimation. The P-ESPRIT algorithm is a joint processing of polarization and super-resolution. It is...
A novel method which is called polarimetric-ESPRIT (P-ESPRIT) algorithm is presented for full-polarization scattering center extraction and parameter estimation. The P-ESPRIT algorithm is a joint processing of polarization and super-resolution. It is...
2008, 30(8): 1968-1972.
doi: 10.3724/SP.J.1146.2006.02033
Abstract:
The 3L (low data sampling rate, low measurement precision and low detection probability) features of sky-wave Over-The-Horizon Radar (OTHR) pose new challenges to the conventional track initiation methods. In this paper, a Two-Hierarchy Hough Transfo...
The 3L (low data sampling rate, low measurement precision and low detection probability) features of sky-wave Over-The-Horizon Radar (OTHR) pose new challenges to the conventional track initiation methods. In this paper, a Two-Hierarchy Hough Transfo...
2008, 30(8): 1973-1976.
doi: 10.3724/SP.J.1146.2007.00075
Abstract:
Interactive image segmentation methods have recently gained more and more attentions. A new interactive segmentation method is proposed based on the graph cuts. It combines several image features like texture, color and edge together through a probab...
Interactive image segmentation methods have recently gained more and more attentions. A new interactive segmentation method is proposed based on the graph cuts. It combines several image features like texture, color and edge together through a probab...
2008, 30(8): 1977-1980.
doi: 10.3724/SP.J.1146.2007.00527
Abstract:
A new beamforming algorithm used in GPS receiver, which can greatly depress the wideband interference, is proposed. The algorithm is based on space-time adaptive processing. Firstly, the steering vectors matrix of interference signals can be estimate...
A new beamforming algorithm used in GPS receiver, which can greatly depress the wideband interference, is proposed. The algorithm is based on space-time adaptive processing. Firstly, the steering vectors matrix of interference signals can be estimate...
2008, 30(8): 1981-1984.
doi: 10.3724/SP.J.1146.2007.00163
Abstract:
In Kalman filtering applications to combination satellite navigation the observation values including outliers are important effect on optimal filtering.The outliers affect the position filtering accuracy and make estimation inaccurate. In this paper...
In Kalman filtering applications to combination satellite navigation the observation values including outliers are important effect on optimal filtering.The outliers affect the position filtering accuracy and make estimation inaccurate. In this paper...
2008, 30(8): 1985-1988.
doi: 10.3724/SP.J.1146.2007.00059
Abstract:
A novel hierarchical mobile IP network analysis model is firstly constructed in this paper. And then a scheme is proposed to set hierarchical mobile IP optimal size of regional network. After mathematical relations between handoff latency and the reg...
A novel hierarchical mobile IP network analysis model is firstly constructed in this paper. And then a scheme is proposed to set hierarchical mobile IP optimal size of regional network. After mathematical relations between handoff latency and the reg...
2008, 30(8): 1989-1993.
doi: 10.3724/SP.J.1146.2006.02063
Abstract:
Analysis on Optical Burst Switching(OBS)network performance based on the Poisson model would not be exactly. In this paper, the distribution of data burst length is researched, and it is simulated that the self-similarity of data burst traffic assemb...
Analysis on Optical Burst Switching(OBS)network performance based on the Poisson model would not be exactly. In this paper, the distribution of data burst length is researched, and it is simulated that the self-similarity of data burst traffic assemb...
2008, 30(8): 1994-1998.
doi: 10.3724/SP.J.1146.2006.02042
Abstract:
In this paper, the problem of dynamic routing under the hose uncertain model for the full-mesh optical network architecture is considered. A novel dynamic routing algorithm-LBADF (Load Balancing with Adjustable Distribution Fraction) based on Valiant...
In this paper, the problem of dynamic routing under the hose uncertain model for the full-mesh optical network architecture is considered. A novel dynamic routing algorithm-LBADF (Load Balancing with Adjustable Distribution Fraction) based on Valiant...
2008, 30(8): 1999-2003.
doi: 10.3724/SP.J.1146.2007.00040
Abstract:
The main methods to construct P2P overlay network are index and super-node, which introduce bottleneck problem and ignore the significant influence of topology aware problem. A new P2P overlay network TPPH is established. It combines the virtue of ef...
The main methods to construct P2P overlay network are index and super-node, which introduce bottleneck problem and ignore the significant influence of topology aware problem. A new P2P overlay network TPPH is established. It combines the virtue of ef...
2008, 30(8): 2004-2007.
doi: 10.3724/SP.J.1146.2007.00053
Abstract:
Secure group key distribution and efficient rekeying is one of the most challenging security issues in Ad hoc networks at present. In this paper, Latin squares are used to construct orthogonal arrays, from which t-packing designs can be quickly obtai...
Secure group key distribution and efficient rekeying is one of the most challenging security issues in Ad hoc networks at present. In this paper, Latin squares are used to construct orthogonal arrays, from which t-packing designs can be quickly obtai...
2008, 30(8): 2008-2011.
doi: 10.3724/SP.J.1146.2007.00076
Abstract:
In this paper, a reconfigurable AHB interface component was designed. This component is for AHB slave devices in SOC. Various types of data interfaces such as register, interrupt, SRAM and FIFO are provided with high configurability. The performance ...
In this paper, a reconfigurable AHB interface component was designed. This component is for AHB slave devices in SOC. Various types of data interfaces such as register, interrupt, SRAM and FIFO are provided with high configurability. The performance ...
2008, 30(8): 2012-2016.
doi: 10.3724/SP.J.1146.2006.02095
Abstract:
A new VLSI architecture of deblocking filter is developed for H.264/AVC system. In the presented architecture, a novel filter scheduling is proposed to reduce the size of local data buffer, and an enhanced data reuse technology is adopted to reduce t...
A new VLSI architecture of deblocking filter is developed for H.264/AVC system. In the presented architecture, a novel filter scheduling is proposed to reduce the size of local data buffer, and an enhanced data reuse technology is adopted to reduce t...
2008, 30(8): 2017-2020.
doi: 10.3724/SP.J.1146.2006.02089
Abstract:
A low-power VLSI Rake receiver is proposed and realized on FPGA for wireless sensor networks used in complicated wireless environments. Low-power design strategies including reducing clock frequency, sharing of models and dynamic sleeping control are...
A low-power VLSI Rake receiver is proposed and realized on FPGA for wireless sensor networks used in complicated wireless environments. Low-power design strategies including reducing clock frequency, sharing of models and dynamic sleeping control are...
2008, 30(8): 2021-2024.
doi: 10.3724/SP.J.1146.2007.00121
Abstract:
Volterra-series behavioral model for Radio Frequency (RF) power amplifier is limited to weak nonlinearity because of high computational complexity. In order to reduce computational complexity or the number of coefficient of Volterra-series kernels, t...
Volterra-series behavioral model for Radio Frequency (RF) power amplifier is limited to weak nonlinearity because of high computational complexity. In order to reduce computational complexity or the number of coefficient of Volterra-series kernels, t...
2008, 30(8): 2025-2028.
doi: 10.3724/SP.J.1146.2008.00163
Abstract:
A new Automatic Gain Control (AGC) circuitry is proposed in this paper. The feedback control scheme of subsequent AGC closed-loop in conventional AGC frame is converted to forward control scheme in new circuitry. The power detector and the loop filte...
A new Automatic Gain Control (AGC) circuitry is proposed in this paper. The feedback control scheme of subsequent AGC closed-loop in conventional AGC frame is converted to forward control scheme in new circuitry. The power detector and the loop filte...
2008, 30(8): 2029-2032.
doi: 10.3724/SP.J.1146.2007.00137
Abstract:
The effect of plated helix on heat dissipation capability of the slow-wave circuit is studied in this paper. With the plated helix, the improvement of the heat dissipation capability of the slow-wave circuit is estimated and evaluated. ANSYS is used ...
The effect of plated helix on heat dissipation capability of the slow-wave circuit is studied in this paper. With the plated helix, the improvement of the heat dissipation capability of the slow-wave circuit is estimated and evaluated. ANSYS is used ...
