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2007 Vol. 29, No. 11
Display Method:
2007, 29(11): 2541-2544.
doi: 10.3724/SP.J.1146.2006.01566
Abstract:
A new method for analyzing module reliability of Network Management System(NMS) in operational phase is proposed to resolve the problem existed in the domain of current NMS reliability evaluation. Firstly, some methods, e.g. periodic survival reports...
A new method for analyzing module reliability of Network Management System(NMS) in operational phase is proposed to resolve the problem existed in the domain of current NMS reliability evaluation. Firstly, some methods, e.g. periodic survival reports...
2007, 29(11): 2545-2548.
doi: 10.3724/SP.J.1146.2006.00550
Abstract:
This paper introduces a value-added service platform in Next Generation Network (NGN) enabled by grid technology to solve the performance issue with traditional application server in NGN. All of the value-added services hosted by this platform are wr...
This paper introduces a value-added service platform in Next Generation Network (NGN) enabled by grid technology to solve the performance issue with traditional application server in NGN. All of the value-added services hosted by this platform are wr...
2007, 29(11): 2549-2554.
doi: 10.3724/SP.J.1146.2006.00393
Abstract:
Differed from the traditional resolution method of selecting a service with highest priority, a method is proposed to resolve the Shared Trigger Interaction (STI) by dividing the services into consistent service and conflict service. The consistent s...
Differed from the traditional resolution method of selecting a service with highest priority, a method is proposed to resolve the Shared Trigger Interaction (STI) by dividing the services into consistent service and conflict service. The consistent s...
2007, 29(11): 2555-2559.
doi: 10.3724/SP.J.1146.2006.00613
Abstract:
In this paper, a new robust and efficient routing strategy for vehicular Ad hoc networks is proposed through analyzing existing routing strategies in city scenarios. A fixed node is set up on the junction, a twice-choice method for choosing routing d...
In this paper, a new robust and efficient routing strategy for vehicular Ad hoc networks is proposed through analyzing existing routing strategies in city scenarios. A fixed node is set up on the junction, a twice-choice method for choosing routing d...
2007, 29(11): 2560-2563.
doi: 10.3724/SP.J.1146.2005.01560
Abstract:
In large scale P2P networks, it is difficult to establish the trust relationship between peers as it is less likely that repeat interactions will occur with the same peer. So the network is vulnerable to malicious peers. A group based hierarchical re...
In large scale P2P networks, it is difficult to establish the trust relationship between peers as it is less likely that repeat interactions will occur with the same peer. So the network is vulnerable to malicious peers. A group based hierarchical re...
2007, 29(11): 2564-2568.
doi: 10.3724/SP.J.1146.2006.00569
Abstract:
While the current object oricented-based description of management operation mechanisms only focuses on operation-level details, the service-oriented methods are proposed, which can improve the description capability with contents involving business ...
While the current object oricented-based description of management operation mechanisms only focuses on operation-level details, the service-oriented methods are proposed, which can improve the description capability with contents involving business ...
2007, 29(11): 2569-2573.
doi: 10.3724/SP.J.1146.2006.00479
Abstract:
In this paper, the performance of cooperative diversity for reach-back problem in wireless sensor networks is studied, in which network synchronization or orthogonal channels are not necessary. The bit error rate and diversity order of destination ar...
In this paper, the performance of cooperative diversity for reach-back problem in wireless sensor networks is studied, in which network synchronization or orthogonal channels are not necessary. The bit error rate and diversity order of destination ar...
2007, 29(11): 2574-2579.
doi: 10.3724/SP.J.1146.2006.00328
Abstract:
By analyzing the present mainly prefetch algorithms advantages and disadvantages, ccording to the difference between VoiceXML-based voice platform and HTML-based World Wide Web, it is proposed that the voice resource should be prefetched in VoiceXML-...
By analyzing the present mainly prefetch algorithms advantages and disadvantages, ccording to the difference between VoiceXML-based voice platform and HTML-based World Wide Web, it is proposed that the voice resource should be prefetched in VoiceXML-...
2007, 29(11): 2580-2584.
doi: 10.3724/SP.J.1146.2006.00403
Abstract:
Anomaly detection acts as one of the important directions of research on Intrusion Detection Systems(IDSs).This paper presents a new method for anomaly detection of user behaviors based on shell commands and Markov chain models. The method constructs...
Anomaly detection acts as one of the important directions of research on Intrusion Detection Systems(IDSs).This paper presents a new method for anomaly detection of user behaviors based on shell commands and Markov chain models. The method constructs...
2007, 29(11): 2585-2588.
doi: 10.3724/SP.J.1146.2006.00609
Abstract:
The conventional PTS method of reducing OFDM signals PAPR has large computation complexity because of the computation of all sets of the phase rotation vectors. In this paper, a general principle of finding appropriate phase rotation vectors by analy...
The conventional PTS method of reducing OFDM signals PAPR has large computation complexity because of the computation of all sets of the phase rotation vectors. In this paper, a general principle of finding appropriate phase rotation vectors by analy...
2007, 29(11): 2589-2592.
doi: 10.3724/SP.J.1146.2006.00524
Abstract:
The performance of joint detection depends highly on the accuracy of channel estimation. In an intra-frequency network, inter-cell interfering signals are treated as white noise in conventional channel estimators, which degrades the accuracy of chann...
The performance of joint detection depends highly on the accuracy of channel estimation. In an intra-frequency network, inter-cell interfering signals are treated as white noise in conventional channel estimators, which degrades the accuracy of chann...
2007, 29(11): 2593-2598.
doi: 10.3724/SP.J.1146.2006.00563
Abstract:
In this paper, a cross-layer cooperative design is developed under the constraint of maximum transmission number per node in an uncoded two-hop relay network. Two-type simple single-relay adaptive cooperative protocols are proposed in order to exploi...
In this paper, a cross-layer cooperative design is developed under the constraint of maximum transmission number per node in an uncoded two-hop relay network. Two-type simple single-relay adaptive cooperative protocols are proposed in order to exploi...
2007, 29(11): 2599-2602.
doi: 10.3724/SP.J.1146.2006.00349
Abstract:
In order to realize the micropayment protocol with both full fairness and non-unit payment function, the concept of Double PayWord Chain(DPWC) and the realization mechanism of non-unit payment are presented first in this paper. Using DPWC, a new Fair...
In order to realize the micropayment protocol with both full fairness and non-unit payment function, the concept of Double PayWord Chain(DPWC) and the realization mechanism of non-unit payment are presented first in this paper. Using DPWC, a new Fair...
2007, 29(11): 2603-2605.
doi: 10.3724/SP.J.1146.2006.00508
Abstract:
In recent years, there has been considerable interest in distributed antenna system due to its promising improvement in coverage, power efficiency and channel capacity. But many papers are only focused on these cases and do not consider multiuser div...
In recent years, there has been considerable interest in distributed antenna system due to its promising improvement in coverage, power efficiency and channel capacity. But many papers are only focused on these cases and do not consider multiuser div...
2007, 29(11): 2606-2608.
doi: 10.3724/SP.J.1146.2006.01171
Abstract:
To research the information capacity of the Asynchronous Optical Code Division Multiple Access (OCDMA) system, the system model and its implementation under ideal channel and AWGN channel optical communications are presented. We modeled a discrete me...
To research the information capacity of the Asynchronous Optical Code Division Multiple Access (OCDMA) system, the system model and its implementation under ideal channel and AWGN channel optical communications are presented. We modeled a discrete me...
2007, 29(11): 2609-2611.
doi: 10.3724/SP.J.1146.2005.00069
Abstract:
A novel space-time block encoding and decoding method in MIMO CDMA system is proposed in this paper. It is called Cyclic Space-Time Block Code (C-STBC). The input data stream is circularly encoded in block, and then the encoded data streams are trans...
A novel space-time block encoding and decoding method in MIMO CDMA system is proposed in this paper. It is called Cyclic Space-Time Block Code (C-STBC). The input data stream is circularly encoded in block, and then the encoded data streams are trans...
2007, 29(11): 2612-2615.
doi: 10.3724/SP.J.1146.2006.00496
Abstract:
An adaptive multistage beamforming receiver with a low complexity that is suitable for CDMA wireless communication systems is proposed in this paper. The receiver adopts a novel orthogonal multistage structure to achieve the system optimization which...
An adaptive multistage beamforming receiver with a low complexity that is suitable for CDMA wireless communication systems is proposed in this paper. The receiver adopts a novel orthogonal multistage structure to achieve the system optimization which...
2007, 29(11): 2616-2619.
doi: 10.3724/SP.J.1146.2006.00548
Abstract:
A block transmission scheme with frequency domain pilots is proposed. Algorithms with low complexity are proposed too, which include channel estimation and equalization algorithm. Compared with the existed block transmission scheme with PN pilots, it...
A block transmission scheme with frequency domain pilots is proposed. Algorithms with low complexity are proposed too, which include channel estimation and equalization algorithm. Compared with the existed block transmission scheme with PN pilots, it...
2007, 29(11): 2620-2623.
doi: 10.3724/SP.J.1146.2006.00670
Abstract:
For burst mode in slowly time-varying channel, channel state information can be obtained mostly based on preamble and supposed maintain constant. In fact, for different OFDM symbol, channel change slowly, so the assumption degrades the system perform...
For burst mode in slowly time-varying channel, channel state information can be obtained mostly based on preamble and supposed maintain constant. In fact, for different OFDM symbol, channel change slowly, so the assumption degrades the system perform...
2007, 29(11): 2624-2627.
doi: 10.3724/SP.J.1146.2006.00855
Abstract:
The problem of the analyses of Space-Time Block Coding (STBC) in impulsive, non-Gaussian noise environments is considered. A model of an additive mixture of Gaussian and non-Gaussian impulsive noise is adopted, and the asymptotical solution of the cl...
The problem of the analyses of Space-Time Block Coding (STBC) in impulsive, non-Gaussian noise environments is considered. A model of an additive mixture of Gaussian and non-Gaussian impulsive noise is adopted, and the asymptotical solution of the cl...
2007, 29(11): 2628-2631.
doi: 10.3724/SP.J.1146.2006.00659
Abstract:
The MIMO channel is changed into the mixture channel using the eigenvector of the channel matrix. The adaptive modulation together with power allocation is studied in order to maximize the system capacity under the constraint of total transmit power ...
The MIMO channel is changed into the mixture channel using the eigenvector of the channel matrix. The adaptive modulation together with power allocation is studied in order to maximize the system capacity under the constraint of total transmit power ...
2007, 29(11): 2632-2636.
doi: 10.3724/SP.J.1146.2006.00373
Abstract:
To resolve the channel resources waste problem of the typical source-specific multicast routing algorithm in Low Earth Orbit (LEO) satellite IP networks, a new core-based shared tree algorithm named Core-cluster Combination-based Shared Tree (CCST) a...
To resolve the channel resources waste problem of the typical source-specific multicast routing algorithm in Low Earth Orbit (LEO) satellite IP networks, a new core-based shared tree algorithm named Core-cluster Combination-based Shared Tree (CCST) a...
2007, 29(11): 2637-2640.
doi: 10.3724/SP.J.1146.2006.00635
Abstract:
CDMA is superior to others methods in the anti-collision of UHF RFID systems for its anti-jamming, security features. A mechanism of anti-collision base on CDMA and its circuits is designed in this paper. This mechanism is simulated, so the relations...
CDMA is superior to others methods in the anti-collision of UHF RFID systems for its anti-jamming, security features. A mechanism of anti-collision base on CDMA and its circuits is designed in this paper. This mechanism is simulated, so the relations...
2007, 29(11): 2641-2644.
doi: 10.3724/SP.J.1146.2006.00567
Abstract:
A chaotic synchronization secure communication method based on several Lorenz systems switch is proposed. These Lorenz systems are built, which are relevant and can be switched each other via the choicer. Chaotic synchronization of these systems is r...
A chaotic synchronization secure communication method based on several Lorenz systems switch is proposed. These Lorenz systems are built, which are relevant and can be switched each other via the choicer. Chaotic synchronization of these systems is r...
2007, 29(11): 2645-2648.
doi: 10.3724/SP.J.1146.2006.01167
Abstract:
The ring signature is one of the anonymous techniques by virtue of its unconditional anonymity. Most proposed ring signature schemes have the problem that the size of ring signatures depends linearly on the group size. That is an open problem. In thi...
The ring signature is one of the anonymous techniques by virtue of its unconditional anonymity. Most proposed ring signature schemes have the problem that the size of ring signatures depends linearly on the group size. That is an open problem. In thi...
Algorithm for Modulation Recognition Based on Characteristic Function in Impulsive Noise Environment
2007, 29(11): 2649-2652.
doi: 10.3724/SP.J.1146.2006.00490
Abstract:
Wireless channel environment is influenced by Gauss noise and impulsive noise. A new algorithm is proposed based on Characteristic Function (CF) phase of received signal by analyzing the feature of SS impulsive noise. The classification vectors are c...
Wireless channel environment is influenced by Gauss noise and impulsive noise. A new algorithm is proposed based on Characteristic Function (CF) phase of received signal by analyzing the feature of SS impulsive noise. The classification vectors are c...
2007, 29(11): 2653-2656.
doi: 10.3724/SP.J.1146.2006.00333
Abstract:
This paper utilizes FFT after undersampling to analyze the relationship between the estimation of sinusoidal parameters and corresponding actual values on the basis of bandpass sampling theorem. In addition, the errors of parameter estimation using p...
This paper utilizes FFT after undersampling to analyze the relationship between the estimation of sinusoidal parameters and corresponding actual values on the basis of bandpass sampling theorem. In addition, the errors of parameter estimation using p...
2007, 29(11): 2657-2660.
doi: 10.3724/SP.J.1146.2006.00619
Abstract:
Steerable filters are a class of filter banks that can implement oriented filtering, and they have less computation quantity than usual oriented filters and can obtain omni-oriented filtering. This paper introduces the wavelet functions and the multi...
Steerable filters are a class of filter banks that can implement oriented filtering, and they have less computation quantity than usual oriented filters and can obtain omni-oriented filtering. This paper introduces the wavelet functions and the multi...
2007, 29(11): 2661-2664.
doi: 10.3724/SP.J.1146.2006.00617
Abstract:
The Support Vector Clustering (SVC) algorithm is introduced to get the number of the pinnacles in the result of the time-frequency analysis and Radon transform of the multi-component Linear FM (LFM) signal, and to finish the detection of the componen...
The Support Vector Clustering (SVC) algorithm is introduced to get the number of the pinnacles in the result of the time-frequency analysis and Radon transform of the multi-component Linear FM (LFM) signal, and to finish the detection of the componen...
An Algorithm of Estimation Direction of Arrival for Phase Interferometer Array Using Cosine Function
2007, 29(11): 2665-2668.
doi: 10.3724/SP.J.1146.2006.00560
Abstract:
In the background of phase ambiguity in using phase interferometer to estimate the direction of arrival, a new algorithm is proposed for estimation Direction Of Arrival (DOA) using phase interferometer array with cosine function. The condition on the...
In the background of phase ambiguity in using phase interferometer to estimate the direction of arrival, a new algorithm is proposed for estimation Direction Of Arrival (DOA) using phase interferometer array with cosine function. The condition on the...
2007, 29(11): 2669-2671.
doi: 10.3724/SP.J.1146.2006.00604
Abstract:
Pitch parameter is often quantized uniformly with no distortion using 7 bit in speech coding applications. As pitch changes slowly in voiced segments, in order to remove the correlation between two consecutive pitch more effectively, based on Eriksso...
Pitch parameter is often quantized uniformly with no distortion using 7 bit in speech coding applications. As pitch changes slowly in voiced segments, in order to remove the correlation between two consecutive pitch more effectively, based on Eriksso...
2007, 29(11): 2672-2675.
doi: 10.3724/SP.J.1146.2006.00608
Abstract:
In traditional low bit-rate speech coding, considering that ears are not sensitive to phase information, the phase information is often neglected, and this will result in coarse and harsh speech quality, and it even may lead to inflection in pitch. I...
In traditional low bit-rate speech coding, considering that ears are not sensitive to phase information, the phase information is often neglected, and this will result in coarse and harsh speech quality, and it even may lead to inflection in pitch. I...
2007, 29(11): 2676-2678.
doi: 10.3724/SP.J.1146.2006.00666
Abstract:
The target capture is the key technology of the space-based early warning system. In this paper, the thrust acceleration is analyzed, and then the nonlinear model of ballistic missile in the image is presented. Combined with the Probabilistic Data As...
The target capture is the key technology of the space-based early warning system. In this paper, the thrust acceleration is analyzed, and then the nonlinear model of ballistic missile in the image is presented. Combined with the Probabilistic Data As...
2007, 29(11): 2679-2682.
doi: 10.3724/SP.J.1146.2006.00556
Abstract:
Multisensor measurement fusion technology can improve the accuracy, reliability, and continuity when it is applied to parameters estimation. A new algorithm for orbit parameters estimation of formation flying satellites is proposed based on extend Ka...
Multisensor measurement fusion technology can improve the accuracy, reliability, and continuity when it is applied to parameters estimation. A new algorithm for orbit parameters estimation of formation flying satellites is proposed based on extend Ka...
2007, 29(11): 2683-2687.
doi: 10.3724/SP.J.1146.2006.00638
Abstract:
A new multi-objective optimization algorithm based on marginal distribution estimation is proposed, in which marginal probability distribution of the selected better individuals is estimated and is used to guide the search of Pareto optimal solutions...
A new multi-objective optimization algorithm based on marginal distribution estimation is proposed, in which marginal probability distribution of the selected better individuals is estimated and is used to guide the search of Pareto optimal solutions...
2007, 29(11): 2688-2692.
doi: 10.3724/SP.J.1146.2006.00457
Abstract:
How causes the algorithm fast to restrain to the true Pareto optimal front, and maintains solutions distributed uniformly in the Pareto optimal front is one of the key research issue. A multi-objective optimization algorithm is proposed based on Q-bi...
How causes the algorithm fast to restrain to the true Pareto optimal front, and maintains solutions distributed uniformly in the Pareto optimal front is one of the key research issue. A multi-objective optimization algorithm is proposed based on Q-bi...
2007, 29(11): 2693-2697.
doi: 10.3724/SP.J.1146.2006.00614
Abstract:
The DNA solution of the Maximum Weighted Independent Set (MWIS) problem based on biological technology is primarily presented in this paper. The MWIS problem is a well-known NP complete problem. The crucial point in the algorithm is to use of direct ...
The DNA solution of the Maximum Weighted Independent Set (MWIS) problem based on biological technology is primarily presented in this paper. The MWIS problem is a well-known NP complete problem. The crucial point in the algorithm is to use of direct ...
2007, 29(11): 2698-2701.
doi: 10.3724/SP.J.1146.2006.00577
Abstract:
An algorithm for estimating full aperture by sparse data is proposed in this paper. For big vacant aperture in sparse data, by measuring sparse data actually, accurate sparse data frequency domain energy distribution estimate can be obtained with par...
An algorithm for estimating full aperture by sparse data is proposed in this paper. For big vacant aperture in sparse data, by measuring sparse data actually, accurate sparse data frequency domain energy distribution estimate can be obtained with par...
2007, 29(11): 2702-2705.
doi: 10.3724/SP.J.1146.2006.00630
Abstract:
The development of bistatic focusing algorithm is a pivotal issue, which is still in progress and not sufficiently solved. This paper firstly describes the special case of equal velocity vectors and parallel flight paths of transmitter and receiver, ...
The development of bistatic focusing algorithm is a pivotal issue, which is still in progress and not sufficiently solved. This paper firstly describes the special case of equal velocity vectors and parallel flight paths of transmitter and receiver, ...
2007, 29(11): 2706-2710.
doi: 10.3724/SP.J.1146.2006.00428
Abstract:
Noise in the interferogram hinders the processing of two-dimensional phase unwrapping, and decreases the accuracy of the final DEM products. In this paper a interferometric phase noise reduction algorithm, in the stationary wavelet domain, is propose...
Noise in the interferogram hinders the processing of two-dimensional phase unwrapping, and decreases the accuracy of the final DEM products. In this paper a interferometric phase noise reduction algorithm, in the stationary wavelet domain, is propose...
2007, 29(11): 2711-2714.
doi: 10.3724/SP.J.1146.2006.00391
Abstract:
The method of measuring deep soil moisture by VHF/UHF dual frequency multiple polarization Synthetic Aperture Radar (SAR) consisting of vector network analyzer is proposed. The backscattering mechanism of vegetation and soil at depth, dielectric prop...
The method of measuring deep soil moisture by VHF/UHF dual frequency multiple polarization Synthetic Aperture Radar (SAR) consisting of vector network analyzer is proposed. The backscattering mechanism of vegetation and soil at depth, dielectric prop...
2007, 29(11): 2715-2719.
doi: 10.3724/SP.J.1146.2006.00538
Abstract:
When high resolution radar observes rough sea surface with low grazing angle the level of sea clutter increases obviously and the sea spike phenomena appears. It is not accurate to analyze the radar echo including stationary sea clutter, spike and ta...
When high resolution radar observes rough sea surface with low grazing angle the level of sea clutter increases obviously and the sea spike phenomena appears. It is not accurate to analyze the radar echo including stationary sea clutter, spike and ta...
2007, 29(11): 2720-2724.
doi: 10.3724/SP.J.1146.2006.00584
Abstract:
A variable discretization precision rough logic neural network is proposed to solve contradiction between network precision and the size of network as well as generalization ability. Based on the approximation area partition, the universe discussed c...
A variable discretization precision rough logic neural network is proposed to solve contradiction between network precision and the size of network as well as generalization ability. Based on the approximation area partition, the universe discussed c...
2007, 29(11): 2725-2728.
doi: 10.3724/SP.J.1146.2006.00593
Abstract:
The simulation of brightness temperature image is a necessary work in the passive microwave remote sensing. This paper introduces the brightness temperature tracing method for 3-D scene microwave radiometric image simulation, and describes the genera...
The simulation of brightness temperature image is a necessary work in the passive microwave remote sensing. This paper introduces the brightness temperature tracing method for 3-D scene microwave radiometric image simulation, and describes the genera...
2007, 29(11): 2729-2733.
doi: 10.3724/SP.J.1146.2006.00522
Abstract:
In this paper, the general noise jamming, cheat jamming and a novel similar clutter jamming method are discussed. From the viewpoint of the jamming power, the precision of leading parameters and the jamming effect, the matched jamming is proposed aft...
In this paper, the general noise jamming, cheat jamming and a novel similar clutter jamming method are discussed. From the viewpoint of the jamming power, the precision of leading parameters and the jamming effect, the matched jamming is proposed aft...
2007, 29(11): 2734-2737.
doi: 10.3724/SP.J.1146.2006.00365
Abstract:
In comparison with the Extended Kalman Filtering (EKF) algorithm, the Auxiliary Variable Particle Filtering (AVPF) algorithm is exploited in this paper to solve the problem of TMA based on Bearing-Only measurements (BO-TMA). Firstly, the problem of n...
In comparison with the Extended Kalman Filtering (EKF) algorithm, the Auxiliary Variable Particle Filtering (AVPF) algorithm is exploited in this paper to solve the problem of TMA based on Bearing-Only measurements (BO-TMA). Firstly, the problem of n...
2007, 29(11): 2738-2742.
doi: 10.3724/SP.J.1146.2006.00633
Abstract:
A new method based on third-order cyclic moment is presented for joint estimation of Directions-Of-Arrival (DOAs) and range of near-field sources. By exploiting the cyclostationarity and space-time information of the signals, the parameters are direc...
A new method based on third-order cyclic moment is presented for joint estimation of Directions-Of-Arrival (DOAs) and range of near-field sources. By exploiting the cyclostationarity and space-time information of the signals, the parameters are direc...
2007, 29(11): 2743-2746.
doi: 10.3724/SP.J.1146.2006.00533
Abstract:
A monopulse reflector antenna with an illuminator of six elements circular array is studied. The antenna has features of broadband and dual circular polarization performance. The output signals of the antenna are similar to multimode circular wavegui...
A monopulse reflector antenna with an illuminator of six elements circular array is studied. The antenna has features of broadband and dual circular polarization performance. The output signals of the antenna are similar to multimode circular wavegui...
2007, 29(11): 2747-2750.
doi: 10.3724/SP.J.1146.2006.00504
Abstract:
A novel Left-Handed Transmission Lines (LHTLs) based on coaxial waveguide is presented, compared with the LHTLs based on microstrip, the new structure has higher operating frequency, lower loss and higher power capability; compared with the LHTLs bas...
A novel Left-Handed Transmission Lines (LHTLs) based on coaxial waveguide is presented, compared with the LHTLs based on microstrip, the new structure has higher operating frequency, lower loss and higher power capability; compared with the LHTLs bas...
2007, 29(11): 2751-2753.
doi: 10.3724/SP.J.1146.2005.01348
Abstract:
In order to make the microstrip equalizer matchs the given attenuation curve respectively ,it should be attenuation adjustable and quality factor adjustable besides frequency adjustable. So in this paper, the novel thin-film resistor loaded microstri...
In order to make the microstrip equalizer matchs the given attenuation curve respectively ,it should be attenuation adjustable and quality factor adjustable besides frequency adjustable. So in this paper, the novel thin-film resistor loaded microstri...
2007, 29(11): 2754-2757.
doi: 10.3724/SP.J.1146.2006.00597
Abstract:
A new type of coupled cavity interaction circuit for harmonic multiplying gyrotron amplifier applications is proposed. Based on Ansoft HFSS software, the relation of the conversion coefficient from the rectangular waveguide TE□10 mode to the cylindri...
A new type of coupled cavity interaction circuit for harmonic multiplying gyrotron amplifier applications is proposed. Based on Ansoft HFSS software, the relation of the conversion coefficient from the rectangular waveguide TE□10 mode to the cylindri...
2007, 29(11): 2758-2761.
doi: 10.3724/SP.J.1146.2006.00486
Abstract:
The ill-conditioned normal equations bring numerical problems in construction of macromodel in time domain for power distribution networking using rational function approximation. This paper presents the superdefinite equations coefficient matrix can...
The ill-conditioned normal equations bring numerical problems in construction of macromodel in time domain for power distribution networking using rational function approximation. This paper presents the superdefinite equations coefficient matrix can...
2007, 29(11): 2762-2766.
doi: 10.3724/SP.J.1146.2006.00377
Abstract:
This paper proposes a new partition algorithm. The variable weight of the nets is introduced into the algorithm. Generally, the nodes connected to the nets are more than two in the hypergraph, so the probability gain model is used to enforce the effe...
This paper proposes a new partition algorithm. The variable weight of the nets is introduced into the algorithm. Generally, the nodes connected to the nets are more than two in the hypergraph, so the probability gain model is used to enforce the effe...
2007, 29(11): 2771-2774.
doi: 10.3724/SP.J.1146.2006.00547
Abstract:
A novel broadband microstrip antenna is presented. Double patch configuration is employed, and a circular metal is introduced on the top of the feed probe to counteract the inductance of the probe. As a result, the bandwidth of microstrip antenna is ...
A novel broadband microstrip antenna is presented. Double patch configuration is employed, and a circular metal is introduced on the top of the feed probe to counteract the inductance of the probe. As a result, the bandwidth of microstrip antenna is ...
2007, 29(11): 2775-2778.
doi: 10.3724/SP.J.1146.2006.00534
Abstract:
OFDM has received a considerable attention for realization of high-speed power line communications, and impulse noise is one of the main disturbances in power line. An optimization algorithm for impulsive noise mitigation in OFDM system is proposed b...
OFDM has received a considerable attention for realization of high-speed power line communications, and impulse noise is one of the main disturbances in power line. An optimization algorithm for impulsive noise mitigation in OFDM system is proposed b...
2007, 29(11): 2779-2782.
doi: 10.3724/SP.J.1146.2006.00492
Abstract:
The agorithm of RLS to suppress unknown narrowband interference is proposed by analyzing the received signalss statistical character when the narrowband interference is unknown in DS-SS systems. Compared with Blind Recursive Least-Square, it doesnt n...
The agorithm of RLS to suppress unknown narrowband interference is proposed by analyzing the received signalss statistical character when the narrowband interference is unknown in DS-SS systems. Compared with Blind Recursive Least-Square, it doesnt n...
2007, 29(11): 2783-2786.
doi: 10.3724/SP.J.1146.2006.00348
Abstract:
A Real-valued Discrete Gabor Transform (RDGT) based on DCT for finite sequences is proposed in this paper, which can be applied to both the critical sampling condition and the over-sampling condition. And the biorthogonal relationship between the ana...
A Real-valued Discrete Gabor Transform (RDGT) based on DCT for finite sequences is proposed in this paper, which can be applied to both the critical sampling condition and the over-sampling condition. And the biorthogonal relationship between the ana...
2007, 29(11): 2787-2790.
doi: 10.3724/SP.J.1146.2006.00585
Abstract:
The hybrid iterative Method of Moments and Physical-Optics method of moments (MoM-PO) is used to analyze radiation pattern of antenna around an electrically large platform modeled with Non-Uniform Rational B-Spline (NURBS) surfaces. The formula of sc...
The hybrid iterative Method of Moments and Physical-Optics method of moments (MoM-PO) is used to analyze radiation pattern of antenna around an electrically large platform modeled with Non-Uniform Rational B-Spline (NURBS) surfaces. The formula of sc...
2007, 29(11): 2791-2794.
doi: 10.3724/SP.J.1146.2006.01196
Abstract:
A mixed-mode AGC is proposed in this paper. The peak value of the output signal is detected by an analog peak detector. The detected peak is then processed by the following comparator and control logic. The gain of the VGA is controlled by the output...
A mixed-mode AGC is proposed in this paper. The peak value of the output signal is detected by an analog peak detector. The detected peak is then processed by the following comparator and control logic. The gain of the VGA is controlled by the output...
2007, 29(11): 2767-2770.
doi: 10.3724/SP.J.1146.2007.00457
Abstract:
IP micro-mobility is one of the mobility management methods that can improve the communication quality during movement of mobile nodes. Handoff management is its key technology. In this paper, a comprehensive survey on IP micro-mobility handoff manag...
IP micro-mobility is one of the mobility management methods that can improve the communication quality during movement of mobile nodes. Handoff management is its key technology. In this paper, a comprehensive survey on IP micro-mobility handoff manag...
