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2009 Vol. 31, No. 1
Display Method:
2009, 31(1): 1-4.
doi: 10.3724/SP.J.1146.2007.01632
Abstract:
Collision issue is a significant one which limits the reading efficiency of RFID systems. This paper presents two new anti-collision protocols - CDCA protocol and CDCA-2D protocol. Detailed theoretical analysis and optimization for the two protocols ...
Collision issue is a significant one which limits the reading efficiency of RFID systems. This paper presents two new anti-collision protocols - CDCA protocol and CDCA-2D protocol. Detailed theoretical analysis and optimization for the two protocols ...
2009, 31(1): 5-8.
doi: 10.3724/SP.J.1146.2007.01207
Abstract:
In this paper, multi-user diversity in the downlink channel of multi-user MIMO system is investigated and two multi-user scheduling algorithms are proposed which are based on the criteria of maximum system capacity. A factor based on inner products o...
In this paper, multi-user diversity in the downlink channel of multi-user MIMO system is investigated and two multi-user scheduling algorithms are proposed which are based on the criteria of maximum system capacity. A factor based on inner products o...
2009, 31(1): 9-12.
doi: 10.3724/SP.J.1146.2007.01077
Abstract:
This paper studies the estimation of slow time-varying frequency-selective MIMO wireless channel, which is described by the parameter of harmonic fitting model and presents a method of channel estimation based on harmonic retrieval of vector sequence...
This paper studies the estimation of slow time-varying frequency-selective MIMO wireless channel, which is described by the parameter of harmonic fitting model and presents a method of channel estimation based on harmonic retrieval of vector sequence...
2009, 31(1): 13-17.
doi: 10.3724/SP.J.1146.2007.01016
Abstract:
To meet the requirements of services with various quality of service in future broadband wireless communication systems, a satisfaction based scheduling scheme with hybrid beamforming strategy in multi-antenna downlink system is presented in this pap...
To meet the requirements of services with various quality of service in future broadband wireless communication systems, a satisfaction based scheduling scheme with hybrid beamforming strategy in multi-antenna downlink system is presented in this pap...
2009, 31(1): 18-22.
doi: 10.3724/SP.J.1146.2007.01060
Abstract:
Frequency Power Partition (FPP) scheme is proposed by considering the uniform distribution of the services among the cells. In FPP, the frequency reuse factor of one is used among the cells. In each cell, two third of the frequency is transmitted by ...
Frequency Power Partition (FPP) scheme is proposed by considering the uniform distribution of the services among the cells. In FPP, the frequency reuse factor of one is used among the cells. In each cell, two third of the frequency is transmitted by ...
2009, 31(1): 23-26.
doi: 10.3724/SP.J.1146.2007.01046
Abstract:
Due to the time variation and frequency offset of mobile radio channels of the OFDM system, the orthogonality between sub-carriers will be destroyed. In this paper, a novel phase rotation technique is proposed which can suppress the Inter-Carrier Int...
Due to the time variation and frequency offset of mobile radio channels of the OFDM system, the orthogonality between sub-carriers will be destroyed. In this paper, a novel phase rotation technique is proposed which can suppress the Inter-Carrier Int...
2009, 31(1): 27-31.
doi: 10.3724/SP.J.1146.2007.00997
Abstract:
In this paper, the channel capacity and the optimal resource allocation scheme for Distributed Alamouti Space-Time Code based on Decode-and-Forward (DF-DASTC) protocol are investigated. Using the degraded relay channel model, the channel capacity of ...
In this paper, the channel capacity and the optimal resource allocation scheme for Distributed Alamouti Space-Time Code based on Decode-and-Forward (DF-DASTC) protocol are investigated. Using the degraded relay channel model, the channel capacity of ...
2009, 31(1): 32-36.
doi: 10.3724/SP.J.1146.2007.01903
Abstract:
A limited feedback-based cooperative MIMO scheme is proposed to reduce the total energy consumption in Wireless Sensor Networks (WSNs). In this scheme based on the gradient algorithm, cluster head and cooperative cluster head can automatically adjust...
A limited feedback-based cooperative MIMO scheme is proposed to reduce the total energy consumption in Wireless Sensor Networks (WSNs). In this scheme based on the gradient algorithm, cluster head and cooperative cluster head can automatically adjust...
2009, 31(1): 37-40.
doi: 10.3724/SP.J.1146.2007.01157
Abstract:
In order to mitigate the effect of NLOS propagation, based on the Geometry Based Single- Bounced (GBSB)statistical model, a TOA/AOA location algorithm based on the RBF neural network is proposed. The fast study and non-linear approach capacity of the...
In order to mitigate the effect of NLOS propagation, based on the Geometry Based Single- Bounced (GBSB)statistical model, a TOA/AOA location algorithm based on the RBF neural network is proposed. The fast study and non-linear approach capacity of the...
2009, 31(1): 41-44.
doi: 10.3724/SP.J.1146.2007.01102
Abstract:
A QoS guaranteed dynamic resource allocation algorithm for downlink MIMO-OFDM systems is proposed based on the research on the issue of resource allocation in multiuser MIMO-OFDM systems. The proposed algorithm utilizes efficiently the spatio-frequen...
A QoS guaranteed dynamic resource allocation algorithm for downlink MIMO-OFDM systems is proposed based on the research on the issue of resource allocation in multiuser MIMO-OFDM systems. The proposed algorithm utilizes efficiently the spatio-frequen...
2009, 31(1): 45-48.
doi: 10.3724/SP.J.1146.2007.01205
Abstract:
A Particle Swarm Optimization (PSO) based Multiuser Detection (MUD) is proposed for the receive- diversity-aided and Space-Time Block Coded Multi-Carrier Code-Division Multiple-Access (STBC-MC-CDMA) systems. Due to the receive-diversity, the signals ...
A Particle Swarm Optimization (PSO) based Multiuser Detection (MUD) is proposed for the receive- diversity-aided and Space-Time Block Coded Multi-Carrier Code-Division Multiple-Access (STBC-MC-CDMA) systems. Due to the receive-diversity, the signals ...
2009, 31(1): 49-52.
doi: 10.3724/SP.J.1146.2007.01191
Abstract:
Linearly constrained Least Square Constant Modulus Algorithm (LSCMA) is an effective solution to the problem of interference capture in Constant Modulus Algorithm (CMA). But the performance will degrade when it is affected by the noise subspace in pr...
Linearly constrained Least Square Constant Modulus Algorithm (LSCMA) is an effective solution to the problem of interference capture in Constant Modulus Algorithm (CMA). But the performance will degrade when it is affected by the noise subspace in pr...
2009, 31(1): 53-56.
doi: 10.3724/SP.J.1146.2007.01189
Abstract:
In order to exploit multi-user diversity gain and spatial multiplexing gain for multi-user MIMO (Multiple-Input Multiple-Output) system with spatial correlation-aided Ricean fading channel, a joint multi-user precoding and scheduling algorithm is pro...
In order to exploit multi-user diversity gain and spatial multiplexing gain for multi-user MIMO (Multiple-Input Multiple-Output) system with spatial correlation-aided Ricean fading channel, a joint multi-user precoding and scheduling algorithm is pro...
2009, 31(1): 57-60.
doi: 10.3724/SP.J.1146.2007.01202
Abstract:
In this paper, the influence of error propagation on soft demodulation in coded MIMO system is analyzed in detail. Besides, based on the thought of soft symbol interference cancellation, Iterative Channel Soft Information (ICSI) for coded MIMO system...
In this paper, the influence of error propagation on soft demodulation in coded MIMO system is analyzed in detail. Besides, based on the thought of soft symbol interference cancellation, Iterative Channel Soft Information (ICSI) for coded MIMO system...
2009, 31(1): 61-65.
doi: 10.3724/SP.J.1146.2007.01044
Abstract:
In this paper, impact of SNR mismatch on the T-TCM performance is investigated in AWGN. The Monte Carlo simulation results indicate that when the under-estimate SNR offset is no more than 4dB, the T-TCM performance will not be badly affected, but gre...
In this paper, impact of SNR mismatch on the T-TCM performance is investigated in AWGN. The Monte Carlo simulation results indicate that when the under-estimate SNR offset is no more than 4dB, the T-TCM performance will not be badly affected, but gre...
2009, 31(1): 66-70.
doi: 10.3724/SP.J.1146.2007.01135
Abstract:
A novel scheme for JPEG2000 adaptive rate control is proposed based on rate pre-allocation and feedback control. After wavelet transform and quantification, a prediction module is introduced to estimate the entropy of EBCOT code block within availabl...
A novel scheme for JPEG2000 adaptive rate control is proposed based on rate pre-allocation and feedback control. After wavelet transform and quantification, a prediction module is introduced to estimate the entropy of EBCOT code block within availabl...
2009, 31(1): 71-74.
doi: 10.3724/SP.J.1146.2007.01079
Abstract:
The synchronization issue between unified chaotic system and its modified system is studied by employing intermittent feedback control. After properly designing intermittent feedback controller, the practical stability of synchronization systems is e...
The synchronization issue between unified chaotic system and its modified system is studied by employing intermittent feedback control. After properly designing intermittent feedback controller, the practical stability of synchronization systems is e...
2009, 31(1): 75-78.
doi: 10.3724/SP.J.1146.2007.00977
Abstract:
One of the main drawbacks of OFDM is its high sensitivity to phase noise (PHN). This gives rise to subcarriers phase rotation and InterCarrier Interference (ICI), so the orthogonality of subcarriers is destroyed. In this paper, an iterative PHN mitig...
One of the main drawbacks of OFDM is its high sensitivity to phase noise (PHN). This gives rise to subcarriers phase rotation and InterCarrier Interference (ICI), so the orthogonality of subcarriers is destroyed. In this paper, an iterative PHN mitig...
2009, 31(1): 79-82.
doi: 10.3724/SP.J.1146.2007.01103
Abstract:
In this paper, two typical high throughput decoding algorithms for QC-LDPC codes are presented: turbo-min-sum-product algorithm and parallel-weighted-bit-flipping algorithm. Their performance are compared in three aspects: decoding speed, hardware co...
In this paper, two typical high throughput decoding algorithms for QC-LDPC codes are presented: turbo-min-sum-product algorithm and parallel-weighted-bit-flipping algorithm. Their performance are compared in three aspects: decoding speed, hardware co...
2009, 31(1): 83-86.
doi: 10.3724/SP.J.1146.2007.01072
Abstract:
This paper brings up with a hardware structure optimized method which is suitable for high code rate LDPC decoder, for example, CCSDS recommended LDPC (Low-Density Parity-Check code) code with ?code rate of 7/8. LDPC code with high code rate is usual...
This paper brings up with a hardware structure optimized method which is suitable for high code rate LDPC decoder, for example, CCSDS recommended LDPC (Low-Density Parity-Check code) code with ?code rate of 7/8. LDPC code with high code rate is usual...
2009, 31(1): 87-90.
doi: 10.3724/SP.J.1146.2007.01070
Abstract:
Two low-complexity Particle Filtering (PF) detections for Multi-Input Multi-Output (MIMO) systems, namely sphere-constrained PF and multi-level mapping PF, are proposed by reducing the sample size and the search space of signal detection, respectivel...
Two low-complexity Particle Filtering (PF) detections for Multi-Input Multi-Output (MIMO) systems, namely sphere-constrained PF and multi-level mapping PF, are proposed by reducing the sample size and the search space of signal detection, respectivel...
2009, 31(1): 91-95.
doi: 10.3724/SP.J.1146.2007.01042
Abstract:
The maximization of data rate under the constraint of diversity gain, coding gain and total transmit power is a considerable issue in concatenated orthogonal space-time coding system. Based on the concatenated orthogonal space-time coding design crit...
The maximization of data rate under the constraint of diversity gain, coding gain and total transmit power is a considerable issue in concatenated orthogonal space-time coding system. Based on the concatenated orthogonal space-time coding design crit...
2009, 31(1): 96-100.
doi: 10.3724/SP.J.1146.2007.01166
Abstract:
A simplified particle filter algorithm, which introduces a compact threshold-based resampling algorithm and features lower computing power and hardware complexity, is proposed for the bearings-only tracking problem. Based on the proposed algorithm, t...
A simplified particle filter algorithm, which introduces a compact threshold-based resampling algorithm and features lower computing power and hardware complexity, is proposed for the bearings-only tracking problem. Based on the proposed algorithm, t...
2009, 31(1): 101-103.
doi: 10.3724/SP.J.1146.2007.01082
Abstract:
When the conventional virtual array is used for adaptive beamforming, the performance is largely influenced with the transforming area, even the serious distortion of the whole beam map will be aroused if an improper transforming area is chosen. This...
When the conventional virtual array is used for adaptive beamforming, the performance is largely influenced with the transforming area, even the serious distortion of the whole beam map will be aroused if an improper transforming area is chosen. This...
2009, 31(1): 104-107.
doi: 10.3724/SP.J.1146.2007.00979
Abstract:
Frequency tracking is a complex nonlinear problem, which is more difficult for the chaotic frequency modulation signal in which the traditional Extended Kalman Filter (EKF) can not work well. Thus, a new state space model for the frequency tracking i...
Frequency tracking is a complex nonlinear problem, which is more difficult for the chaotic frequency modulation signal in which the traditional Extended Kalman Filter (EKF) can not work well. Thus, a new state space model for the frequency tracking i...
2009, 31(1): 108-111.
doi: 10.3724/SP.J.1146.2007.00994
Abstract:
In this paper, the issue of blind image restoration is considered by using 2-D Great Common Divisor (GCD) extraction approach. A precise extraction algorithm of 2-D GCD is proposed. Since no high order ill-posed equation is needed, calculation comple...
In this paper, the issue of blind image restoration is considered by using 2-D Great Common Divisor (GCD) extraction approach. A precise extraction algorithm of 2-D GCD is proposed. Since no high order ill-posed equation is needed, calculation comple...
2009, 31(1): 112-115.
doi: 10.3724/SP.J.1146.2007.01039
Abstract:
Using image decomposition theory proposed by Meyer, a total variation image denoising method based on smoothing flow field is presented. Firstly, through applying Hilbert-Sobolev norm to measure fidelity term, a total variation filter is used to smoo...
Using image decomposition theory proposed by Meyer, a total variation image denoising method based on smoothing flow field is presented. Firstly, through applying Hilbert-Sobolev norm to measure fidelity term, a total variation filter is used to smoo...
2009, 31(1): 116-119.
doi: 10.3724/SP.J.1146.2007.00247
Abstract:
A feature representation method based on multi-layer local moment invariants for gait analysis and recognition applications is developed. The method includes following steps: first, silhouette extraction is performed for each image sequence. Secondly...
A feature representation method based on multi-layer local moment invariants for gait analysis and recognition applications is developed. The method includes following steps: first, silhouette extraction is performed for each image sequence. Secondly...
2009, 31(1): 120-123.
doi: 10.3724/SP.J.1146.2006.01509
Abstract:
A framework of reconstructing a super-resolution video sequence from a low resolution video sequence is proposed in this paper. First, an upsampling and deconvolution algorithm for single frame is introduced based on regularization by means of CG alg...
A framework of reconstructing a super-resolution video sequence from a low resolution video sequence is proposed in this paper. First, an upsampling and deconvolution algorithm for single frame is introduced based on regularization by means of CG alg...
2009, 31(1): 124-128.
doi: 10.3724/SP.J.1146.2007.01126
Abstract:
This paper researches the multiscal geometry analysis tool, NonSubsampled Contourlet Transform (NSCT), and proposes a new method of fusing panchromatic and multispectral images based on NSCT and Stationary Wavelet Transform (SWT). This method first p...
This paper researches the multiscal geometry analysis tool, NonSubsampled Contourlet Transform (NSCT), and proposes a new method of fusing panchromatic and multispectral images based on NSCT and Stationary Wavelet Transform (SWT). This method first p...
2009, 31(1): 129-133.
doi: 10.3724/SP.J.1146.2007.01014
Abstract:
Double Density Dual-Tree Complex Wavelet Transform (DDDTCWT) integrates the advantages of double density wavelet, dual tree wavelet and complex wavelet. It has translation invariability and improved directionality. When it is introduced to image fusi...
Double Density Dual-Tree Complex Wavelet Transform (DDDTCWT) integrates the advantages of double density wavelet, dual tree wavelet and complex wavelet. It has translation invariability and improved directionality. When it is introduced to image fusi...
2009, 31(1): 134-138.
doi: 10.3724/SP.J.1146.2007.01043
Abstract:
Watermark robustness to geometric attacks is still an open problem. This paper presents a new multi-bit image watermarking scheme that can resist Rotation, Scaling, Translation (RST), cropping as well as common signal processing attacks. The proposed...
Watermark robustness to geometric attacks is still an open problem. This paper presents a new multi-bit image watermarking scheme that can resist Rotation, Scaling, Translation (RST), cropping as well as common signal processing attacks. The proposed...
2009, 31(1): 139-142.
doi: 10.3724/SP.J.1146.2007.01108
Abstract:
This paper analyzes the statistical characteristics of radar clutter, discusses the K-distributed random process used for describing the amplitude characteristics of the clutter, deduces the formulas of relation between K-distributed and Gamma-distri...
This paper analyzes the statistical characteristics of radar clutter, discusses the K-distributed random process used for describing the amplitude characteristics of the clutter, deduces the formulas of relation between K-distributed and Gamma-distri...
2009, 31(1): 143-146.
doi: 10.3724/SP.J.1146.2007.01087
Abstract:
Passive radar imaging algorithm based on external illuminator requires large accumulated rotating angle of target. But in an actual circumstance, large rotating angle demands long time， which is hard to satisfy the request of real time，on the other h...
Passive radar imaging algorithm based on external illuminator requires large accumulated rotating angle of target. But in an actual circumstance, large rotating angle demands long time， which is hard to satisfy the request of real time，on the other h...
2009, 31(1): 147-151.
doi: 10.3724/SP.J.1146.2008.00045
Abstract:
Multi-carrier MIMO radar is a radar system with multiple transmitted antennas and multiple received antennas capitalizing on frequency diversity and spatial diversity to obtain orthogonality of transmitted signals and the methods based on the dechirp...
Multi-carrier MIMO radar is a radar system with multiple transmitted antennas and multiple received antennas capitalizing on frequency diversity and spatial diversity to obtain orthogonality of transmitted signals and the methods based on the dechirp...
2009, 31(1): 152-155.
doi: 10.3724/SP.J.1146.2007.01181
Abstract:
Synthetic Aperture Radar (SAR) using multiple transmit-receive apertures can obtain wider swath and higher spatial resolution. In this paper, intersection of frequency spectrum is adopted in the SAR imaging using multiple transmit-receive apertures, ...
Synthetic Aperture Radar (SAR) using multiple transmit-receive apertures can obtain wider swath and higher spatial resolution. In this paper, intersection of frequency spectrum is adopted in the SAR imaging using multiple transmit-receive apertures, ...
2009, 31(1): 156-159.
doi: 10.3724/SP.J.1146.2007.01110
Abstract:
Accurate motion compensation is a key issue for high-resolution airborne SAR imaging. In order to attain high-quality squint SAR images, it is detailedly discussed that Extended Wavenumber Domain (EWD) algorithm combines two-step motion compensation ...
Accurate motion compensation is a key issue for high-resolution airborne SAR imaging. In order to attain high-quality squint SAR images, it is detailedly discussed that Extended Wavenumber Domain (EWD) algorithm combines two-step motion compensation ...
2009, 31(1): 160-163.
doi: 10.3724/SP.J.1146.2007.01041
Abstract:
A modified ACCA-CFAR method with local adaptive threshold is proposed for SAR image detection based on ACCA-CFAR in this paper, in which the K-distribution is used to describe the clutter. First the parameter of K-distribution is estimated, secondly,...
A modified ACCA-CFAR method with local adaptive threshold is proposed for SAR image detection based on ACCA-CFAR in this paper, in which the K-distribution is used to describe the clutter. First the parameter of K-distribution is estimated, secondly,...
2009, 31(1): 164-168.
doi: 10.3724/SP.J.1146.2008.00416
Abstract:
The improved fractal feature of each pixel can be extracted based on the filtered image using the exponential wavelet at one scale and energy functions. This paper studies the method of the improved fractal feature for SAR images target detection. Th...
The improved fractal feature of each pixel can be extracted based on the filtered image using the exponential wavelet at one scale and energy functions. This paper studies the method of the improved fractal feature for SAR images target detection. Th...
2009, 31(1): 169-172.
doi: 10.3724/SP.J.1146.2007.01107
Abstract:
Ultra-WideBand Synthetic Aperture Radar (UWB SAR) can detect shallow buried UneXploded Ordnance (UXO), where the efficiency of extracted features determines the detection performance. The traditional subband-subaperture processing extracts the freque...
Ultra-WideBand Synthetic Aperture Radar (UWB SAR) can detect shallow buried UneXploded Ordnance (UXO), where the efficiency of extracted features determines the detection performance. The traditional subband-subaperture processing extracts the freque...
2009, 31(1): 173-176.
doi: 10.3724/SP.J.1146.2007.01066
Abstract:
Based on the analysis of bistatic SAR geometry model, bistatic SAR echoed signal is modeled in the double range variables domain in this paper, and the relationship between the double range variable domain and the single range variable domain is esta...
Based on the analysis of bistatic SAR geometry model, bistatic SAR echoed signal is modeled in the double range variables domain in this paper, and the relationship between the double range variable domain and the single range variable domain is esta...
2009, 31(1): 177-181.
doi: 10.3724/SP.J.1146.2007.01111
Abstract:
Many traditional target extraction methods encountered a new challenge as the spatial resolution is increasing quickly. For the purpose of extracting buildings automatically in that circumstance, a new method combing both the object-based approach an...
Many traditional target extraction methods encountered a new challenge as the spatial resolution is increasing quickly. For the purpose of extracting buildings automatically in that circumstance, a new method combing both the object-based approach an...
2009, 31(1): 182-187.
doi: 10.3724/SP.J.1146.2007.01104
Abstract:
Making use of bistatic SAR image simulation, polarimetric characteristics of BISAR image are studied. It is found that some conventional polarimetric parameters, such as Cloudes , ,, for interpretation of monostatic SAR image lose their effectiveness...
Making use of bistatic SAR image simulation, polarimetric characteristics of BISAR image are studied. It is found that some conventional polarimetric parameters, such as Cloudes , ,, for interpretation of monostatic SAR image lose their effectiveness...
2009, 31(1): 188-191.
doi: 10.3724/SP.J.1146.2007.01167
Abstract:
To enhance accurate recognition rate of radar emitter signals to meet the requirements of modern electronic warfare, a novel method for radar emitter signals recognition is presented in this paper. Based on the over-complete multiscale dictionary of ...
To enhance accurate recognition rate of radar emitter signals to meet the requirements of modern electronic warfare, a novel method for radar emitter signals recognition is presented in this paper. Based on the over-complete multiscale dictionary of ...
2009, 31(1): 192-195.
doi: 10.3724/SP.J.1146.2007.01118
Abstract:
In the situation of sample pollution, nulls would be formed in the expected direction, which results a great decrease in the signal-to-interference-noise ratio. And in the situation of limited snapshots, the given white noise exists in the form of co...
In the situation of sample pollution, nulls would be formed in the expected direction, which results a great decrease in the signal-to-interference-noise ratio. And in the situation of limited snapshots, the given white noise exists in the form of co...
The Study of Integrity Monitor Algorithm of the Pseudorange Correction Error on LAAS Ground Facility
2009, 31(1): 196-200.
doi: 10.3724/SP.J.1146.2007.01006
Abstract:
The formulas of the pseudorange correction error are deduced. The existing integrity monitor method of the pseudorange correction error with excluding B value is analyzed, and some conclusions are obtained: the B values are correlative, if one B valu...
The formulas of the pseudorange correction error are deduced. The existing integrity monitor method of the pseudorange correction error with excluding B value is analyzed, and some conclusions are obtained: the B values are correlative, if one B valu...
2009, 31(1): 201-205.
doi: 10.3724/SP.J.1146.2007.00995
Abstract:
In order to reduce energy consumption of nodes in the wireless ad hoc networks, a Power Control Algorithm based on Position of node (PCAP) is proposed. By analyzing the relationship between nodes, the Optimized Neighbor Set (ONS) of node is built. PC...
In order to reduce energy consumption of nodes in the wireless ad hoc networks, a Power Control Algorithm based on Position of node (PCAP) is proposed. By analyzing the relationship between nodes, the Optimized Neighbor Set (ONS) of node is built. PC...
2009, 31(1): 206-209.
doi: 10.3724/SP.J.1146.2007.01178
Abstract:
Wavelength-Division-Multiplexing (WDM) multi-granularity traffic switching all-optical network is the evolution direction of the recent optical transport networks. In this paper, the practical WDM multi-granularity traffic switching testing network i...
Wavelength-Division-Multiplexing (WDM) multi-granularity traffic switching all-optical network is the evolution direction of the recent optical transport networks. In this paper, the practical WDM multi-granularity traffic switching testing network i...
2009, 31(1): 210-214.
doi: 10.3724/SP.J.1146.2007.01134
Abstract:
To eliminate the affect of the change of resource information on the QoS multicast routing, an algorithm for Distributed QoS Multicast Routing with Resource Reservation(DQMTR) is put forward in this paper. Using resource reservation in the process of...
To eliminate the affect of the change of resource information on the QoS multicast routing, an algorithm for Distributed QoS Multicast Routing with Resource Reservation(DQMTR) is put forward in this paper. Using resource reservation in the process of...
2009, 31(1): 215-218.
doi: 10.3724/SP.J.1146.2007.01047
Abstract:
Scheme of opportunistic cooperation transmission and its performance in wireless sensor network is studied based on Nakagami channel in this paper, and effect of circuit power on the scheme is also researched. Three issues including how to cooperatio...
Scheme of opportunistic cooperation transmission and its performance in wireless sensor network is studied based on Nakagami channel in this paper, and effect of circuit power on the scheme is also researched. Three issues including how to cooperatio...
2009, 31(1): 219-223.
doi: 10.3724/SP.J.1146.2007.01094
Abstract:
The conflict interference issue of the carrier sensing wireless network is investigated, and an adaptive power control mechanism of DCF protocol in Ad hoc networks is proposed. According to the communication status of the receiver, this mechanism adj...
The conflict interference issue of the carrier sensing wireless network is investigated, and an adaptive power control mechanism of DCF protocol in Ad hoc networks is proposed. According to the communication status of the receiver, this mechanism adj...
2009, 31(1): 224-227.
doi: 10.3724/SP.J.1146.2007.01519
Abstract:
Principals establish trust relationship by iterative disclosure of credentials and access control policies in trust negotiation. The policies and credentials might be protected because the policies might not be revealed directly and credentials posse...
Principals establish trust relationship by iterative disclosure of credentials and access control policies in trust negotiation. The policies and credentials might be protected because the policies might not be revealed directly and credentials posse...
2009, 31(1): 228-232.
Abstract:
A game-theoretic analysis of security interactive behavior is performed between the DoS attacker and the defender under incomplete information. The dilemma of defense is discussed and the underlying fact is revealed that asymmetric nature of informat...
A game-theoretic analysis of security interactive behavior is performed between the DoS attacker and the defender under incomplete information. The dilemma of defense is discussed and the underlying fact is revealed that asymmetric nature of informat...
2009, 31(1): 233-237.
doi: 10.3724/SP.J.1146.2007.01574
Abstract:
The electromagnetic wave transmission with plane wave incidence on the rough surface of layered medium is studied, the formulae of the transmission coefficient for different polarization is derived using the small perturbation method. A 2-D fBm fract...
The electromagnetic wave transmission with plane wave incidence on the rough surface of layered medium is studied, the formulae of the transmission coefficient for different polarization is derived using the small perturbation method. A 2-D fBm fract...
2009, 31(1): 238-241.
doi: 10.3724/SP.J.1146.2007.01007
Abstract:
Due to high integration and high speed operation, array multiplier much likely suffers from delay fault. In this paper, a Built-In Self-Test (BIST) scheme is presented for the delay fault test of such array multiplier in which an accumulator is utili...
Due to high integration and high speed operation, array multiplier much likely suffers from delay fault. In this paper, a Built-In Self-Test (BIST) scheme is presented for the delay fault test of such array multiplier in which an accumulator is utili...
2009, 31(1): 242-245.
doi: 10.3724/SP.J.1146.2007.01156
Abstract:
Coupling capacitance and mutual inductance are important factors of crosstalk losses in high frequency. ABCD models with improper mutual inductance description have been reported to be used to obtain step response of coupling interconnects . In this ...
Coupling capacitance and mutual inductance are important factors of crosstalk losses in high frequency. ABCD models with improper mutual inductance description have been reported to be used to obtain step response of coupling interconnects . In this ...
2009, 31(1): 250-252.
doi: 10.3724/SP.J.1146.2007.01374
Abstract:
The characteristics of electromagnetic pulse produced by Photo-Conductive switches and Blumlein line under the bias voltage is studied by FDTD. The DAlemberts formula is used to analyze the principle of Blumlein line. A total reflection border and th...
The characteristics of electromagnetic pulse produced by Photo-Conductive switches and Blumlein line under the bias voltage is studied by FDTD. The DAlemberts formula is used to analyze the principle of Blumlein line. A total reflection border and th...
2009, 31(1): 246-249.
doi: 10.3724/SP.J.1146.2007.01234
Abstract:
Two kinds of forgery attacks strategy on the group signature schemes proposed respectively by Wang et al.. (2003) and Lin et al.. (2006) based on the Tseng-Jans(1999) group signature scheme is developed. Without using any secret identification or sec...
Two kinds of forgery attacks strategy on the group signature schemes proposed respectively by Wang et al.. (2003) and Lin et al.. (2006) based on the Tseng-Jans(1999) group signature scheme is developed. Without using any secret identification or sec...
