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2007 Vol. 29, No. 3
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2007, 29(3): 509-512.
doi: 10.3724/SP.J.1146.2005.00844
Abstract:
Super resolution estimates of target ranges, azimuth angles and Doppler frequencies for HF-Surface Wave Radar (HF-SWR) are investigated in this paper. An algorithm based on the method of Direction Of Arrival (DOA) matrix to achieve simultaneous targe...
Super resolution estimates of target ranges, azimuth angles and Doppler frequencies for HF-Surface Wave Radar (HF-SWR) are investigated in this paper. An algorithm based on the method of Direction Of Arrival (DOA) matrix to achieve simultaneous targe...
2007, 29(3): 513-516.
doi: 10.3724/SP.J.1146.2005.00754
Abstract:
This paper proposes a new method based on statistical model of wavelet coefficients combined with modification to them according to significant coefficient rule. In the method, wavelet coefficients of logarithmic image are firstly modeled as mixture ...
This paper proposes a new method based on statistical model of wavelet coefficients combined with modification to them according to significant coefficient rule. In the method, wavelet coefficients of logarithmic image are firstly modeled as mixture ...
2007, 29(3): 517-520.
doi: 10.3724/SP.J.1146.2005.01584
Abstract:
The property that the ordered statistics CFAR(OS-CFAR) detector can obtain constant false alarm rate under homogeneous Log-normal distributed clutter background is proved in this paper, when the shape parameter of probability density function is know...
The property that the ordered statistics CFAR(OS-CFAR) detector can obtain constant false alarm rate under homogeneous Log-normal distributed clutter background is proved in this paper, when the shape parameter of probability density function is know...
2007, 29(3): 521-523.
doi: 10.3724/SP.J.1146.2005.00997
Abstract:
The estimation of rotation angle is the precondition for ISAR imaging. In this passage, a new method based on the analysis of the echo signals is proposed. The signals in different range bin are approximated as the multi-component third-order polynom...
The estimation of rotation angle is the precondition for ISAR imaging. In this passage, a new method based on the analysis of the echo signals is proposed. The signals in different range bin are approximated as the multi-component third-order polynom...
River Detection in SAR Images Based on Edge Extraction in Wavelet Domain and Ridge Tracing Technique
2007, 29(3): 524-527.
doi: 10.3724/SP.J.1146.2005.00992
Abstract:
This paper deals with automatic river detection in SAR images. A new method is proposed using the boundary extraction in wavelet domain and merging the water region by ridge tracing. In the method, edge detection is approached by direct spatial corre...
This paper deals with automatic river detection in SAR images. A new method is proposed using the boundary extraction in wavelet domain and merging the water region by ridge tracing. In the method, edge detection is approached by direct spatial corre...
2007, 29(3): 528-531.
doi: 10.3724/SP.J.1146.2005.00688
Abstract:
A passive radar imaging algorithm is presented in the paper. Receiving the reflected signals from multiple television stations located at various aspect angles, the algorithm can image moving object by synthesizing multiple sub-apertures of the telev...
A passive radar imaging algorithm is presented in the paper. Receiving the reflected signals from multiple television stations located at various aspect angles, the algorithm can image moving object by synthesizing multiple sub-apertures of the telev...
2007, 29(3): 532-535.
doi: 10.3724/SP.J.1146.2005.01036
Abstract:
A new IMM algorithm for tracking maneuvering target is proposed, which uses a CS(Current Statistical) model with a fading factor and a CV(Constant Velocity) model for interaction. The CS model itself has a high precision when tracking common maneuver...
A new IMM algorithm for tracking maneuvering target is proposed, which uses a CS(Current Statistical) model with a fading factor and a CV(Constant Velocity) model for interaction. The CS model itself has a high precision when tracking common maneuver...
2007, 29(3): 536-539.
doi: 10.3724/SP.J.1146.2005.00673
Abstract:
SAR/DPCA(Displaced Phase Center Antenna) technique is a simple and practical method of multi-channel SAR/GMTI(Graund Moving Target Indication), but in practice it is limited by some kinds of errors, in which antenna phase center velocity error and ch...
SAR/DPCA(Displaced Phase Center Antenna) technique is a simple and practical method of multi-channel SAR/GMTI(Graund Moving Target Indication), but in practice it is limited by some kinds of errors, in which antenna phase center velocity error and ch...
2007, 29(3): 540-543.
doi: 10.3724/SP.J.1146.2005.00985
Abstract:
This paper proposes a novel mixed genetic algorithmActive Mutating Anneal-Genetic Algorithm(AMAGA) based on sorting and describes an elevation beam widening method of spaceborne SAR antenna, which only changes the phases at part of array elements and...
This paper proposes a novel mixed genetic algorithmActive Mutating Anneal-Genetic Algorithm(AMAGA) based on sorting and describes an elevation beam widening method of spaceborne SAR antenna, which only changes the phases at part of array elements and...
2007, 29(3): 544-548.
doi: 10.3724/SP.J.1146.2005.00816
Abstract:
In this paper, the variation of Doppler frequency of the group flying targets is analyzed. For low resolution radars, the echoes of targets can be modeled as Linear Frequency Modulated (LFM) signals. A method for detecting the number of targets is pr...
In this paper, the variation of Doppler frequency of the group flying targets is analyzed. For low resolution radars, the echoes of targets can be modeled as Linear Frequency Modulated (LFM) signals. A method for detecting the number of targets is pr...
2007, 29(3): 549-552.
doi: 10.3724/SP.J.1146.2005.01023
Abstract:
Utilizing Dynamic Bayesian Networks (DBNs) to deal with multi-temporal remote sensing data, the multi-temporal data of different time can be input simultaneously, and the classification and the acquirement of relationships between the output types ca...
Utilizing Dynamic Bayesian Networks (DBNs) to deal with multi-temporal remote sensing data, the multi-temporal data of different time can be input simultaneously, and the classification and the acquirement of relationships between the output types ca...
2007, 29(3): 553-556.
doi: 10.3724/SP.J.1146.2005.01585
Abstract:
This paper presents the arrangement strategy of ground stations for a regional positioning system and derives the formulas for calculating GDOP with 4 grounds stations. With the flying users known altitude, the highest positioning precision can be ac...
This paper presents the arrangement strategy of ground stations for a regional positioning system and derives the formulas for calculating GDOP with 4 grounds stations. With the flying users known altitude, the highest positioning precision can be ac...
2007, 29(3): 557-559.
doi: 10.3724/SP.J.1146.2005.00999
Abstract:
In this paper, a high performance frequency domain cancellation algorithm is presented to suppress the noise amplitude modulation interference. By the logarithm transform, the carrier frequency and initial phase of the jamming signal are estimated fr...
In this paper, a high performance frequency domain cancellation algorithm is presented to suppress the noise amplitude modulation interference. By the logarithm transform, the carrier frequency and initial phase of the jamming signal are estimated fr...
2007, 29(3): 560-564.
doi: 10.3724/SP.J.1146.2006.00882
Abstract:
There are many uncertain decision-making questions, in which the information is incomplete and vague, in the electronic equipment test system. The grey system theory is a powerful tool to settle the kind question. The component of the electronic equi...
There are many uncertain decision-making questions, in which the information is incomplete and vague, in the electronic equipment test system. The grey system theory is a powerful tool to settle the kind question. The component of the electronic equi...
2007, 29(3): 565-569.
doi: 10.3724/SP.J.1146.2004.01296
Abstract:
Target locating based on the measuring of the azimuth and elevation data of targets is a new way of target passive locating. In this paper, a algorithm formula for three station locating is put forward, several filtering algorithms is discussed, prec...
Target locating based on the measuring of the azimuth and elevation data of targets is a new way of target passive locating. In this paper, a algorithm formula for three station locating is put forward, several filtering algorithms is discussed, prec...
2007, 29(3): 570-573.
doi: 10.3724/SP.J.1146.2005.00857
Abstract:
Based on fractional wave packet transform, a new hybrid time-frequency transform: Gauss Short-time Fractional Fourier Transform (GSFrFT) is proposed for the detection and estimation of Linear Frequency-Modulated (LFM) signals. Multiple LFM signals ca...
Based on fractional wave packet transform, a new hybrid time-frequency transform: Gauss Short-time Fractional Fourier Transform (GSFrFT) is proposed for the detection and estimation of Linear Frequency-Modulated (LFM) signals. Multiple LFM signals ca...
2007, 29(3): 574-577.
doi: 10.3724/SP.J.1146.2005.00728
Abstract:
Aiming at the problem of phase error caused by normal filters in signal processing, this paper summarizes the important meaning of digital filtering with zero-phase error, and introduces the all phase method as a new design method of digital filter w...
Aiming at the problem of phase error caused by normal filters in signal processing, this paper summarizes the important meaning of digital filtering with zero-phase error, and introduces the all phase method as a new design method of digital filter w...
2007, 29(3): 578-581.
doi: 10.3724/SP.J.1146.2005.00724
Abstract:
The paper simplifies the joint diagonalization of matrices into optimization problem which only includes the eigen matrix. For solving the problem conveniently, each row vector of the eigen matrix is parameterized, then utilizes the improved genetic ...
The paper simplifies the joint diagonalization of matrices into optimization problem which only includes the eigen matrix. For solving the problem conveniently, each row vector of the eigen matrix is parameterized, then utilizes the improved genetic ...
2007, 29(3): 582-584.
doi: 10.3724/SP.J.1146.2005.00756
Abstract:
This paper provides the Cramer-Rao lower bound of alternating separation algorithm. In the Cramer-Rao bound, the #61485; inversion of a definite matrix must be established, which extends the theory of Cramer-Rao bound. In additional, this Cramer-Rao ...
This paper provides the Cramer-Rao lower bound of alternating separation algorithm. In the Cramer-Rao bound, the #61485; inversion of a definite matrix must be established, which extends the theory of Cramer-Rao bound. In additional, this Cramer-Rao ...
2007, 29(3): 585-588.
doi: 10.3724/SP.J.1146.2005.00836
Abstract:
According to simple computation, good anti-noise ability and low precision of Katz algorithm and complex computation and good precision of box-counting dimension and correlation dimension, an Improvement fractal algorithm Based on Wave (IBW) is prese...
According to simple computation, good anti-noise ability and low precision of Katz algorithm and complex computation and good precision of box-counting dimension and correlation dimension, an Improvement fractal algorithm Based on Wave (IBW) is prese...
2007, 29(3): 589-592.
doi: 10.3724/SP.J.1146.2005.00717
Abstract:
A Voice Activity Detection (VAD) method for microphone array signals in directional noise field is proposed. As the noises received by different microphones are correlated with each other in directional noise field, relatively pure speech can be deri...
A Voice Activity Detection (VAD) method for microphone array signals in directional noise field is proposed. As the noises received by different microphones are correlated with each other in directional noise field, relatively pure speech can be deri...
2007, 29(3): 593-597.
doi: 10.3724/SP.J.1146.2005.00941
Abstract:
To take full advantage of the anisotropic texture information and multidimensional singular information in an image, a novel method for image fusion based on anisotropic texture information is presented in this paper. And the local energy operator is...
To take full advantage of the anisotropic texture information and multidimensional singular information in an image, a novel method for image fusion based on anisotropic texture information is presented in this paper. And the local energy operator is...
2007, 29(3): 598-600.
doi: 10.3724/SP.J.1146.2005.00975
Abstract:
In the real world, it is a common problem how to estimate the state of nonlinear systems with colored noise. The Extended Kalman Filter (EKF) is generally used to linearize the state or measure equations of the nonlinear system, and the linear method...
In the real world, it is a common problem how to estimate the state of nonlinear systems with colored noise. The Extended Kalman Filter (EKF) is generally used to linearize the state or measure equations of the nonlinear system, and the linear method...
2007, 29(3): 601-605.
doi: 10.3724/SP.J.1146.2005.01015
Abstract:
With the volume of information available on the Internet and corporate intranets continues to increase, text classification has become one of the key technology in organizing and processing large amount of document data. This paper gives a novel meth...
With the volume of information available on the Internet and corporate intranets continues to increase, text classification has become one of the key technology in organizing and processing large amount of document data. This paper gives a novel meth...
2007, 29(3): 606-610.
doi: 10.3724/SP.J.1146.2005.00770
Abstract:
Based on cross sub-image block, a novel algorithm of digital image stabilization is presented, which makes use of the similar features existed between adjacent images. First, the representative points which represent global features are acquired thro...
Based on cross sub-image block, a novel algorithm of digital image stabilization is presented, which makes use of the similar features existed between adjacent images. First, the representative points which represent global features are acquired thro...
2007, 29(3): 611-615.
doi: 10.3724/SP.J.1146.2005.01069
Abstract:
In this paper, based on rough logic theory, the design of rough neural network in the meaning of rough logic is studied. The character of rough logic neural network and fuzzy logic neural network are analyzed and compared. The validity of the rough l...
In this paper, based on rough logic theory, the design of rough neural network in the meaning of rough logic is studied. The character of rough logic neural network and fuzzy logic neural network are analyzed and compared. The validity of the rough l...
2007, 29(3): 616-621.
doi: 10.3724/SP.J.1146.2005.01029
Abstract:
In order to decrease the communication bandwidth and save the transmitting power in the wireless endoscopy capsule, this paper presents a low complexity and high efficient near-lossless and lossless image compression algorithm for hardware design bas...
In order to decrease the communication bandwidth and save the transmitting power in the wireless endoscopy capsule, this paper presents a low complexity and high efficient near-lossless and lossless image compression algorithm for hardware design bas...
2007, 29(3): 622-625.
doi: 10.3724/SP.J.1146.2005.01010
Abstract:
Image registration based on mutual information is of high accuracy and robustness. Hence, it has received much attention these years. Unfortunately, the mutual information function is generally not a smooth function but one containing many local maxi...
Image registration based on mutual information is of high accuracy and robustness. Hence, it has received much attention these years. Unfortunately, the mutual information function is generally not a smooth function but one containing many local maxi...
2007, 29(3): 626-630.
doi: 10.3724/SP.J.1146.2006.00306
Abstract:
In this paper, a GPSA face recognition approach by probabilistic subspace analysis in Gabor wavelet domain is presented. First, an improved Gabor representation scheme for face images is given, then a Gabor based probabilistic subspace model is built...
In this paper, a GPSA face recognition approach by probabilistic subspace analysis in Gabor wavelet domain is presented. First, an improved Gabor representation scheme for face images is given, then a Gabor based probabilistic subspace model is built...
2007, 29(3): 631-634.
doi: 10.3724/SP.J.1146.2005.00852
Abstract:
A new concept of time-frequency rate distribution is proposed. It can serve as an effective tool for superimposed LFM signal parameter estimation. A new method based on the time-frequency rate distribution is also proposed. Performance analysis shows...
A new concept of time-frequency rate distribution is proposed. It can serve as an effective tool for superimposed LFM signal parameter estimation. A new method based on the time-frequency rate distribution is also proposed. Performance analysis shows...
2007, 29(3): 635-638.
doi: 10.3724/SP.J.1146.2005.00685
Abstract:
In Orthogonal Frequency Division Multiplexing (OFDM) systems, to avoid influence of the low-pass filter on the transmitter side, some subcarriers on both edges of the allocated bandwidth are not used for transmission. These subcarriers are usually ca...
In Orthogonal Frequency Division Multiplexing (OFDM) systems, to avoid influence of the low-pass filter on the transmitter side, some subcarriers on both edges of the allocated bandwidth are not used for transmission. These subcarriers are usually ca...
2007, 29(3): 639-642.
doi: 10.3724/SP.J.1146.2006.00376
Abstract:
A Constant False Alarm Rate (CFAR) detector based on automatic censored algorithm in presence of reverberation is proposed in the paper. It automatically censors the interfering points in reference cells, so the limitation of method proposed by Barna...
A Constant False Alarm Rate (CFAR) detector based on automatic censored algorithm in presence of reverberation is proposed in the paper. It automatically censors the interfering points in reference cells, so the limitation of method proposed by Barna...
2007, 29(3): 643-647.
doi: 10.3724/SP.J.1146.2005.00787
Abstract:
In this paper, a new technique about long distance source localization with active and passive towed line array is presented. At first, a acoustic scattering field receiving equation for active and passive line array is derived. Then, this new method...
In this paper, a new technique about long distance source localization with active and passive towed line array is presented. At first, a acoustic scattering field receiving equation for active and passive line array is derived. Then, this new method...
2007, 29(3): 648-651.
doi: 10.3724/SP.J.1146.2005.01037
Abstract:
A binary tree scheme to construct Zero Correlation Window (ZCW) complementary codes is presented. The gap between the code number of the construction method and that of the theoretic bound is at most one when the code is long enough. In order to obta...
A binary tree scheme to construct Zero Correlation Window (ZCW) complementary codes is presented. The gap between the code number of the construction method and that of the theoretic bound is at most one when the code is long enough. In order to obta...
2007, 29(3): 652-656.
doi: 10.3724/SP.J.1146.2005.00970
Abstract:
For MIMO systems where channel state information is not acquired either at the receiver or at the transmitter, a novel family of full diversity unitary space-time block coding scheme is proposed in this paper, which combines Cayley transformation and...
For MIMO systems where channel state information is not acquired either at the receiver or at the transmitter, a novel family of full diversity unitary space-time block coding scheme is proposed in this paper, which combines Cayley transformation and...
2007, 29(3): 657-660.
doi: 10.3724/SP.J.1146.2005.00764
Abstract:
In this paper, the decoding algorithm of Low-Density Parity-Check (LDPC) codes is analyzed, and a new decoding algorithm based on the belief propagation (BP) algorithm to eliminate the influence of cycles in the factor graph is proposed. In the tradi...
In this paper, the decoding algorithm of Low-Density Parity-Check (LDPC) codes is analyzed, and a new decoding algorithm based on the belief propagation (BP) algorithm to eliminate the influence of cycles in the factor graph is proposed. In the tradi...
2007, 29(3): 661-665.
doi: 10.3724/SP.J.1146.2005.00668
Abstract:
A low complexity detection scheme for the MIMO system with distributed transmit antennas is presented. Based on a Sorted CHolesky Decomposition (SCHD), the additive gaussian color noise after match filter is whitened; The detection sequence according...
A low complexity detection scheme for the MIMO system with distributed transmit antennas is presented. Based on a Sorted CHolesky Decomposition (SCHD), the additive gaussian color noise after match filter is whitened; The detection sequence according...
2007, 29(3): 666-670.
doi: 10.3724/SP.J.1146.2005.00767
Abstract:
Space-Time Coding (STC) techniques, which combine antenna array signal processing and channel coding techniques, are very promising approaches to substantial capacity increase in wireless communications. In order to restrain the interference of co-ch...
Space-Time Coding (STC) techniques, which combine antenna array signal processing and channel coding techniques, are very promising approaches to substantial capacity increase in wireless communications. In order to restrain the interference of co-ch...
2007, 29(3): 671-673.
doi: 10.3724/SP.J.1146.2005.00696
Abstract:
A NLOS(Non Line Of Sight) high-resolution location algorithm is brought forward based on TOA(Time Of Arrival), AOA(Angle Of Arrival), which can be measured by two base station. The algorithm bases on the single reflect model, the simulation proves th...
A NLOS(Non Line Of Sight) high-resolution location algorithm is brought forward based on TOA(Time Of Arrival), AOA(Angle Of Arrival), which can be measured by two base station. The algorithm bases on the single reflect model, the simulation proves th...
2007, 29(3): 674-676.
doi: 10.3724/SP.J.1146.2005.00911
Abstract:
Considering the von Mises distribution as the received multipath power density distribution versus the AOA of scatter components, a formula for multipath angular spread corresponding to this distribution is presented in multi-antenna Rice channels, a...
Considering the von Mises distribution as the received multipath power density distribution versus the AOA of scatter components, a formula for multipath angular spread corresponding to this distribution is presented in multi-antenna Rice channels, a...
2007, 29(3): 677-680.
doi: 10.3724/SP.J.1146.2005.00780
Abstract:
Based on the Chaotic Pulse Position Modulation (CPPM) method, a novel communication scheme is proposed for Ultra-Wide Bandwidth Impulse radio Communication System (UWB-ICS) in this paper. The proposed scheme can overcome the disadvantages existing in...
Based on the Chaotic Pulse Position Modulation (CPPM) method, a novel communication scheme is proposed for Ultra-Wide Bandwidth Impulse radio Communication System (UWB-ICS) in this paper. The proposed scheme can overcome the disadvantages existing in...
2007, 29(3): 681-685.
doi: 10.3724/SP.J.1146.2005.00964
Abstract:
An optimal tradeoff formula between diversity gain and multiplexing gain was derived. The formula is a step decreasing and right continuous function，and the number of steps is equal to the number of receiving antennas. The diversity gain is relative ...
An optimal tradeoff formula between diversity gain and multiplexing gain was derived. The formula is a step decreasing and right continuous function，and the number of steps is equal to the number of receiving antennas. The diversity gain is relative ...
2007, 29(3): 686-689.
doi: 10.3724/SP.J.1146.2005.00928
Abstract:
Mean shift, an iterative procedure that shifts each data point to the average of data points in its neighborhood, has been applied to object tracking. However, with the changing structure of object in video sequences, traditional mean shift tracker b...
Mean shift, an iterative procedure that shifts each data point to the average of data points in its neighborhood, has been applied to object tracking. However, with the changing structure of object in video sequences, traditional mean shift tracker b...
2007, 29(3): 690-695.
doi: 10.3724/SP.J.1146.2005.01027
Abstract:
In multimedia conference, audio mixing is an essential component, which affects the communication between users. At present, the commonly used audio mixing algorithms have a protean volume. By analyzing those algorithms, the conclusion of mutative mi...
In multimedia conference, audio mixing is an essential component, which affects the communication between users. At present, the commonly used audio mixing algorithms have a protean volume. By analyzing those algorithms, the conclusion of mutative mi...
2007, 29(3): 696-698.
doi: 10.3724/SP.J.1146.2005.00773
Abstract:
In order to effectively reduce the effects of multi-access interference on the performance of optical code division multiple access (CDMA) communication systems with intensity modulation and direct detection，according to group information, a novel ki...
In order to effectively reduce the effects of multi-access interference on the performance of optical code division multiple access (CDMA) communication systems with intensity modulation and direct detection，according to group information, a novel ki...
2007, 29(3): 699-701.
doi: 10.3724/SP.J.1146.2005.00842
Abstract:
This paper discusses the reason of the security weakness of generalized state-space observers-based approaches for secure communication, using chaotic masking and chaotic nodulation of a Lorenz system and proposes a method to solve this problem. Theo...
This paper discusses the reason of the security weakness of generalized state-space observers-based approaches for secure communication, using chaotic masking and chaotic nodulation of a Lorenz system and proposes a method to solve this problem. Theo...
2007, 29(3): 702-706.
doi: 10.3724/SP.J.1146.2005.00667
Abstract:
To solve the QoS issue of the Internet including multi-services, a Priority-based Scheduling Structure (PSS) designed for high-speed packet networks is proposed. PSS divides packet scheduling into high-priority section and low-priority section. In th...
To solve the QoS issue of the Internet including multi-services, a Priority-based Scheduling Structure (PSS) designed for high-speed packet networks is proposed. PSS divides packet scheduling into high-priority section and low-priority section. In th...
2007, 29(3): 707-710.
doi: 10.3724/SP.J.1146.2005.00679
Abstract:
This paper adopted space restrain mechanism in the plain of network nodes due to the lower performance of connectivity in wireless cellular Ad hoc networks, and the total interference of the networks is decreased by considering location information a...
This paper adopted space restrain mechanism in the plain of network nodes due to the lower performance of connectivity in wireless cellular Ad hoc networks, and the total interference of the networks is decreased by considering location information a...
2007, 29(3): 711-715.
doi: 10.3724/SP.J.1146.2005.00849
Abstract:
Admission Control (AC) plays a significant role in providing the desired Quality of Service (QoS) in Broadband Wireless Access (BWA). In this paper, a unitive Utility-ratio based adaptive Admission Control algorithm (UAC) with probability and the Enh...
Admission Control (AC) plays a significant role in providing the desired Quality of Service (QoS) in Broadband Wireless Access (BWA). In this paper, a unitive Utility-ratio based adaptive Admission Control algorithm (UAC) with probability and the Enh...
2007, 29(3): 716-718.
doi: 10.3724/SP.J.1146.2005.00874
Abstract:
The minimum cost multicast tree may boil down to Steiner tree problem which is NP-Complete. In multicast applications, heuristic algorithms are commonly used to calculate the suboptimal tree. In this paper, a new heuristic algorithm named Shared Path...
The minimum cost multicast tree may boil down to Steiner tree problem which is NP-Complete. In multicast applications, heuristic algorithms are commonly used to calculate the suboptimal tree. In this paper, a new heuristic algorithm named Shared Path...
2007, 29(3): 719-724.
doi: 10.3724/SP.J.1146.2005.00949
Abstract:
To provide a higher QoS for Ad hoc network, this paper presents a Probability-based Detection Multi-Channel and Multi-Access(PDMCMA) protocol. It analyzes the systemic throughput of fixed occupation and sequent occupation system along with the result...
To provide a higher QoS for Ad hoc network, this paper presents a Probability-based Detection Multi-Channel and Multi-Access(PDMCMA) protocol. It analyzes the systemic throughput of fixed occupation and sequent occupation system along with the result...
2007, 29(3): 725-728.
doi: 10.3724/SP.J.1146.2005.01005
Abstract:
Traffic prediction is the core of network quality of service problems, such as traffic engineering and congestion control, etc. According to the characters of traffic, a novel network traffic prediction algorithm in which Kalman filter and wavelet ar...
Traffic prediction is the core of network quality of service problems, such as traffic engineering and congestion control, etc. According to the characters of traffic, a novel network traffic prediction algorithm in which Kalman filter and wavelet ar...
2007, 29(3): 729-732.
doi: 10.3724/SP.J.1146.2005.00930
Abstract:
Supporting fast restoration for general mesh topologies with minimal network over build is a technically challenging problem. In order to solve the problem of assigning minimum protection capacity, some ideal topologies are given and the algorithm of...
Supporting fast restoration for general mesh topologies with minimal network over build is a technically challenging problem. In order to solve the problem of assigning minimum protection capacity, some ideal topologies are given and the algorithm of...
2007, 29(3): 733-738.
doi: 10.3724/SP.J.1146.2005.01192
Abstract:
An autonomous negotiation model is proposed in allusion to the application of E-commerce. In this model, some vectors are employed to describe the formalization of negotiation issues; the two utility functions are defined to depict the utility evalua...
An autonomous negotiation model is proposed in allusion to the application of E-commerce. In this model, some vectors are employed to describe the formalization of negotiation issues; the two utility functions are defined to depict the utility evalua...
2007, 29(3): 739-742.
doi: 10.3724/SP.J.1146.2005.00677
Abstract:
In this paper, the model of limited radius, residual balanced multicast routing problem is improved. Considering the degree-constraints, minimal radius and load balance simultaneously, we present the concepts of deficient degree and the saturate degr...
In this paper, the model of limited radius, residual balanced multicast routing problem is improved. Considering the degree-constraints, minimal radius and load balance simultaneously, we present the concepts of deficient degree and the saturate degr...
2007, 29(3): 743-746.
doi: 10.3724/SP.J.1146.2005.01263
Abstract:
In this article, a novel Clock Feedthrough Frequency Compensation (CFFC) method based on the Minimum-Settling-Time (MST) theory and step-response analysis of a second order system is presented. Cadence ADE simulation results of a folded-cascode OTA w...
In this article, a novel Clock Feedthrough Frequency Compensation (CFFC) method based on the Minimum-Settling-Time (MST) theory and step-response analysis of a second order system is presented. Cadence ADE simulation results of a folded-cascode OTA w...
2007, 29(3): 747-750.
doi: 10.3724/SP.J.1146.2005.00699
Abstract:
Vector hydrophone can measure energy and particle velocity at a point in space with one sensor and can estimate the bearing of target. This paper , sound pressure gradient method and acoustic intensity method and apply genetic algorithm for acoustic ...
Vector hydrophone can measure energy and particle velocity at a point in space with one sensor and can estimate the bearing of target. This paper , sound pressure gradient method and acoustic intensity method and apply genetic algorithm for acoustic ...
2007, 29(3): 751-755.
doi: 10.3724/SP.J.1146.2005.00957
Abstract:
An improved method for evaluating the dispersion and coupling impedance of a tape helix is utilized. The assumption about the surface current density distribution on the tape is avoided by expanding it in a series of Chebyshev polynomials. The propag...
An improved method for evaluating the dispersion and coupling impedance of a tape helix is utilized. The assumption about the surface current density distribution on the tape is avoided by expanding it in a series of Chebyshev polynomials. The propag...
2007, 29(3): 756-759.
doi: 10.3724/SP.J.1146.2005.00990
Abstract:
A new two parameter CFAR detector in K-distribution clutter based on enhanced M-estimator and OSGO-CFAR detector is proposed in this paper. The performance of the detector is analyzed against uniform clutter background. Compared to OSGO with given sh...
A new two parameter CFAR detector in K-distribution clutter based on enhanced M-estimator and OSGO-CFAR detector is proposed in this paper. The performance of the detector is analyzed against uniform clutter background. Compared to OSGO with given sh...
2007, 29(3): 760-762.
doi: 10.3724/SP.J.1146.2005.01039
Abstract:
A novel method for n-order current-mode filters using the Current Differencing Buffered Amplifier(CDBA) is presented. Based on the signal-flow-graph a systematic design formula is given in this papers. As examples, a new fifth-order butterworth low-p...
A novel method for n-order current-mode filters using the Current Differencing Buffered Amplifier(CDBA) is presented. Based on the signal-flow-graph a systematic design formula is given in this papers. As examples, a new fifth-order butterworth low-p...
