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2005 Vol. 27, No. 5
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2005, 27(5): 673-678.
Abstract:
The combining form of the MultiCarrier (MC) technique with the Vertical Bell Labs lAyered Space-Time (V-BLAST) architecture, i.e., the MC V-BLAST system, can better take advantage of the frequency diversity force resulting from the frequency-selectiv...
The combining form of the MultiCarrier (MC) technique with the Vertical Bell Labs lAyered Space-Time (V-BLAST) architecture, i.e., the MC V-BLAST system, can better take advantage of the frequency diversity force resulting from the frequency-selectiv...
2005, 27(5): 679-682.
Abstract:
The proposed Grade of Service based Call Admission Control (GoS-CAC) algorithm operates a threshold comparison, which integrates many factors that affect the decision accuracy of a CAC scheme such as system traffic loads, Quality of Service (QoS) req...
The proposed Grade of Service based Call Admission Control (GoS-CAC) algorithm operates a threshold comparison, which integrates many factors that affect the decision accuracy of a CAC scheme such as system traffic loads, Quality of Service (QoS) req...
2005, 27(5): 683-687.
Abstract:
OFDM systems is sensitive to the frequency offset. In this paper, a novel frequency ambiguity resolution algorithm in OFDM systems based on null subcarrier detection is proposed to correct the frequency ambiguity. It utilizes the subcarriers which tr...
OFDM systems is sensitive to the frequency offset. In this paper, a novel frequency ambiguity resolution algorithm in OFDM systems based on null subcarrier detection is proposed to correct the frequency ambiguity. It utilizes the subcarriers which tr...
2005, 27(5): 688-690.
Abstract:
A new OFDM decision-directed carrier frequency offset tracking algorithm is presented. High precision, low computational efforts and simple implement are obtained with the new algorithm. And an improvement method is also described which enhances the ...
A new OFDM decision-directed carrier frequency offset tracking algorithm is presented. High precision, low computational efforts and simple implement are obtained with the new algorithm. And an improvement method is also described which enhances the ...
2005, 27(5): 691-693.
Abstract:
Avoiding oscillation phenomenon which occurs in analysis and reconstruction of image edges, an application without extrapolation both sides is proposed. Image energy is concentrated in low frequency by using nonlinear transform, and the exact jumps l...
Avoiding oscillation phenomenon which occurs in analysis and reconstruction of image edges, an application without extrapolation both sides is proposed. Image energy is concentrated in low frequency by using nonlinear transform, and the exact jumps l...
2005, 27(5): 694-698.
Abstract:
In this paper, on the basis of analyzing the principle of Multi-Carrier Code Division Multiple Access (MC-CDMA) technique, by adopting the optimized multiband complex wavelet as multi-carrier modulation and the turbo codes as channel coding, a MC-CDM...
In this paper, on the basis of analyzing the principle of Multi-Carrier Code Division Multiple Access (MC-CDMA) technique, by adopting the optimized multiband complex wavelet as multi-carrier modulation and the turbo codes as channel coding, a MC-CDM...
2005, 27(5): 699-702.
Abstract:
In this paper, a new generalized construction method for correlation immune Boolean function satisfying PC(l) of order k is provided. The construction is based on the use of linear error-correcting codes together with bijective functions. Furthermore...
In this paper, a new generalized construction method for correlation immune Boolean function satisfying PC(l) of order k is provided. The construction is based on the use of linear error-correcting codes together with bijective functions. Furthermore...
2005, 27(5): 703-706.
Abstract:
Chaos shift keying secure communication system with dual-ring erbium-doped fiber laser is presented. The chaos shift keying is realized by modulating parameters of the pump light. A matching method to reduce the synchronization error by modulating th...
Chaos shift keying secure communication system with dual-ring erbium-doped fiber laser is presented. The chaos shift keying is realized by modulating parameters of the pump light. A matching method to reduce the synchronization error by modulating th...
2005, 27(5): 707-711.
Abstract:
The paper investigates the QoS routing problem with uncertain network condition, including MP(Most Probable Path), OP(Optimal Partition) and OP-MP(Optimally Partitioned MP). The question MP is studied when density function of the link delay is contin...
The paper investigates the QoS routing problem with uncertain network condition, including MP(Most Probable Path), OP(Optimal Partition) and OP-MP(Optimally Partitioned MP). The question MP is studied when density function of the link delay is contin...
2005, 27(5): 712-716.
Abstract:
This paper proposes a class of convolutional codes based on complementary structure to cancel the First-Adjacent Channel(FAC) interference in FM In-band On-channel Digital Audio Broadcasting(FM IBOC DAB) system. Those complementary convolutional code...
This paper proposes a class of convolutional codes based on complementary structure to cancel the First-Adjacent Channel(FAC) interference in FM In-band On-channel Digital Audio Broadcasting(FM IBOC DAB) system. Those complementary convolutional code...
2005, 27(5): 717-721.
Abstract:
In this paper, the image intensity surface for the neighborhood of every pixel is well-fitted by the Least Squares Support Vector Machine (LSSVM), and the gradient and the zero-crossing operators are deduced from the LSSVM with the Radial Basis Funct...
In this paper, the image intensity surface for the neighborhood of every pixel is well-fitted by the Least Squares Support Vector Machine (LSSVM), and the gradient and the zero-crossing operators are deduced from the LSSVM with the Radial Basis Funct...
2005, 27(5): 722-725.
Abstract:
This paper is mainly about the theoretical method to analyzing the frame error rate of Rate Compatable Punctured Turbo (RCPT) codes and the throughput efficiency of the RCPT-ARQ system. The time-varying trellis method is proposed to calculate the inp...
This paper is mainly about the theoretical method to analyzing the frame error rate of Rate Compatable Punctured Turbo (RCPT) codes and the throughput efficiency of the RCPT-ARQ system. The time-varying trellis method is proposed to calculate the inp...
2005, 27(5): 726-730.
Abstract:
A new spatial time-frequency distribution of polarization is constructed using fractional Fourier Transform for LFM signals, A novel algorithm of joint two-dimensional and polarization estimation is proposed based on the vector sensor array of L mode...
A new spatial time-frequency distribution of polarization is constructed using fractional Fourier Transform for LFM signals, A novel algorithm of joint two-dimensional and polarization estimation is proposed based on the vector sensor array of L mode...
2005, 27(5): 731-733.
Abstract:
As for a large number of unknown frequencies of harmonic signals existing in the practice, the paper presents the detecting method utilizing the nonlinear chaotic dynamic system. Firstly, the method verifies being the periodic solution originated fro...
As for a large number of unknown frequencies of harmonic signals existing in the practice, the paper presents the detecting method utilizing the nonlinear chaotic dynamic system. Firstly, the method verifies being the periodic solution originated fro...
2005, 27(5): 734-739.
Abstract:
For small parameter Stochastic Resonance (SR), the relationship among the response amplitude and signal frequency and noise intensity is investigated. The viewpoint of creating SR phenomenon only in the low frequency region where noise energy has bee...
For small parameter Stochastic Resonance (SR), the relationship among the response amplitude and signal frequency and noise intensity is investigated. The viewpoint of creating SR phenomenon only in the low frequency region where noise energy has bee...
2005, 27(5): 740-744.
Abstract:
The Adaptive Fractional Lower order Covariance (AFLC) time delay estimation method performs robust under impulsive noise environments, but the values of parameters a and b have effects on estimated precision. According to the non-stationary property ...
The Adaptive Fractional Lower order Covariance (AFLC) time delay estimation method performs robust under impulsive noise environments, but the values of parameters a and b have effects on estimated precision. According to the non-stationary property ...
2005, 27(5): 745-748.
Abstract:
To achieve good performance when applying subspace method based on four-order cumulants in DOA estimation, signals are required to be independent to satisfy non-coherence of four-order. Here, a modified method without independence requirement is prop...
To achieve good performance when applying subspace method based on four-order cumulants in DOA estimation, signals are required to be independent to satisfy non-coherence of four-order. Here, a modified method without independence requirement is prop...
2005, 27(5): 749-752.
Abstract:
The rank-1 ambiguity problem involved in the Polarization-Angular Coherence Structure (PACS) of a 5-D co-localized vector antenna whose elements are orthogonally oriented is adrressed in this paper. Two kinds of equivalent relations are defined, unde...
The rank-1 ambiguity problem involved in the Polarization-Angular Coherence Structure (PACS) of a 5-D co-localized vector antenna whose elements are orthogonally oriented is adrressed in this paper. Two kinds of equivalent relations are defined, unde...
2005, 27(5): 757-761.
Abstract:
This paper describes a novel motion object detection and tracking algorithm based on the Multiscale Edges Detection (MED) and Continuous Wavelet Transform (CWT). Multiscale representations are very effective for analyzing the information content of i...
This paper describes a novel motion object detection and tracking algorithm based on the Multiscale Edges Detection (MED) and Continuous Wavelet Transform (CWT). Multiscale representations are very effective for analyzing the information content of i...
2005, 27(5): 762-766.
Abstract:
With lots of studies, it is admitted that the variable bit rate video traffic exhibits high long range dependence and burstness. Its traffic is predicted by auto-regressive process with high order in this paper while the probablity distribution of tr...
With lots of studies, it is admitted that the variable bit rate video traffic exhibits high long range dependence and burstness. Its traffic is predicted by auto-regressive process with high order in this paper while the probablity distribution of tr...
2005, 27(5): 767-770.
Abstract:
With the fast development and extensive application of Synthetic Aperture Radar(SAR), There are more and more interference and jamming to SAR. It is necessary to assure performance of SAR imaging to enhance the ability of interference suppression. Th...
With the fast development and extensive application of Synthetic Aperture Radar(SAR), There are more and more interference and jamming to SAR. It is necessary to assure performance of SAR imaging to enhance the ability of interference suppression. Th...
2005, 27(5): 771-774.
Abstract:
Under the given condition, distributed small satellites bistatic SAR can be considered as a kind of bistatic SAR, whose transmitter and receiver move in parallel. In this paper, an imaging method based on range distance compensation is discussed. Wit...
Under the given condition, distributed small satellites bistatic SAR can be considered as a kind of bistatic SAR, whose transmitter and receiver move in parallel. In this paper, an imaging method based on range distance compensation is discussed. Wit...
2005, 27(5): 775-778.
Abstract:
Taking Rayleigh model as an example, this paper studies a correction method for Synthetic Aperture Radar (SAR) analog-to-digital converter saturation based on power compensation and extends it to Weibull model. Then it analyzes the applicability of t...
Taking Rayleigh model as an example, this paper studies a correction method for Synthetic Aperture Radar (SAR) analog-to-digital converter saturation based on power compensation and extends it to Weibull model. Then it analyzes the applicability of t...
2005, 27(5): 779-783.
Abstract:
In this paper a new algorithm for SAR image lossy compression based on lifting scheme is brought forward, aiming at special characteristics of SAR imagery. The algorithm can reduce the speckle noise, improve the computation precision and time, and up...
In this paper a new algorithm for SAR image lossy compression based on lifting scheme is brought forward, aiming at special characteristics of SAR imagery. The algorithm can reduce the speckle noise, improve the computation precision and time, and up...
2005, 27(5): 784-788.
Abstract:
In this paper, one-dimensional scattering centre extraction of radar targets is reviewed. A new classifier based on fuzzy distribution is proposed, which is very much suitable for one-dimensional scattering centre classification. The fuzzy classifier...
In this paper, one-dimensional scattering centre extraction of radar targets is reviewed. A new classifier based on fuzzy distribution is proposed, which is very much suitable for one-dimensional scattering centre classification. The fuzzy classifier...
2005, 27(5): 789-792.
Abstract:
This paper analyses the limitation of the algorithm of stagger multiple frequency for CW radar, and two algorithms are proposed.They are the algorithm of multiple frequency to dual frequency and the algorithm of quadratic phase difference.Their princ...
This paper analyses the limitation of the algorithm of stagger multiple frequency for CW radar, and two algorithms are proposed.They are the algorithm of multiple frequency to dual frequency and the algorithm of quadratic phase difference.Their princ...
2005, 27(5): 793-796.
Abstract:
To avoid the computational complexity and the precision decrease from the nonlinear feature in passive tracking, the state of the target is approximately estimated by least squares algorithm at first, and then a current statistical model and an adapt...
To avoid the computational complexity and the precision decrease from the nonlinear feature in passive tracking, the state of the target is approximately estimated by least squares algorithm at first, and then a current statistical model and an adapt...
2005, 27(5): 797-800.
Abstract:
With differential time offset and differential frequency offset, the position of the satellite interference can be located by using two-satellite techniques. The position equations are non-linear and they are very difficult to be solved. Scholar Hawo...
With differential time offset and differential frequency offset, the position of the satellite interference can be located by using two-satellite techniques. The position equations are non-linear and they are very difficult to be solved. Scholar Hawo...
2005, 27(5): 801-804.
Abstract:
For the pattern synthesis of antenna arrays by using genetic algorithm, it is important to select a proper objective function, which greatly influences the result and efficiency of the algorithm. In this paper, some kinds of objective functions used ...
For the pattern synthesis of antenna arrays by using genetic algorithm, it is important to select a proper objective function, which greatly influences the result and efficiency of the algorithm. In this paper, some kinds of objective functions used ...
2005, 27(5): 805-810.
Abstract:
A Quantum probability Coding Genetic Algorithm-QCGA is proposed, which is different from classical GAs. In QCGA, single individual represents a probability distribution of solutions, which covers the whole solution space. Individuals in QCGA evolve i...
A Quantum probability Coding Genetic Algorithm-QCGA is proposed, which is different from classical GAs. In QCGA, single individual represents a probability distribution of solutions, which covers the whole solution space. Individuals in QCGA evolve i...
2005, 27(5): 811-813.
Abstract:
In this paper, an quantum signature scheme is presented which based on the entanglement swapping. In this scheme, Alice performs a local unitary operation on her two qubits according to message code, after swapping qubits with administrator and Bob, ...
In this paper, an quantum signature scheme is presented which based on the entanglement swapping. In this scheme, Alice performs a local unitary operation on her two qubits according to message code, after swapping qubits with administrator and Bob, ...
2005, 27(5): 814-818.
Abstract:
Biochemical reaction theory based DNA computation is of much better performance in solving a class of intractable computational problems such as NP-complete problems, it is important to study the DNA computation. A novel algorithm based on DNA comput...
Biochemical reaction theory based DNA computation is of much better performance in solving a class of intractable computational problems such as NP-complete problems, it is important to study the DNA computation. A novel algorithm based on DNA comput...
2005, 27(5): 819-822.
Abstract:
The conditions of the steady operation of the amplifiers are analyzed based on the characteristics of beam-wave interactions of harmonic gyroklystron amplifiers in this paper. The optimized design parameters of the circuit of the beam-wave interactio...
The conditions of the steady operation of the amplifiers are analyzed based on the characteristics of beam-wave interactions of harmonic gyroklystron amplifiers in this paper. The optimized design parameters of the circuit of the beam-wave interactio...
2005, 27(5): 823-826.
Abstract:
This paper analyzes the restrictive conditions, proposes a mapping of ternary function with mutually exclusive variables and the graphic simplification rules. It can greatly reduce the size of K-map, and has several advantages such as intuition, conv...
This paper analyzes the restrictive conditions, proposes a mapping of ternary function with mutually exclusive variables and the graphic simplification rules. It can greatly reduce the size of K-map, and has several advantages such as intuition, conv...
2005, 27(5): 835-837.
Abstract:
A new learning algorithm of fuzzy classification rules is presented based on ensemble learning algorithm. By tuning the distribution of training instances during each AdaBoost iterative training, the classification rules with fuzzy antecedent and con...
A new learning algorithm of fuzzy classification rules is presented based on ensemble learning algorithm. By tuning the distribution of training instances during each AdaBoost iterative training, the classification rules with fuzzy antecedent and con...
2005, 27(5): 838-840.
Abstract:
A novel modulation mode named Fuzzy Pulse Skip Modulation(FPSM) in power converter is proposed in this paper, which is based on Pulse Skip Modulation(PSM) mode proposed by authors recently. PSM is a novel modulation mode in power converter, which has...
A novel modulation mode named Fuzzy Pulse Skip Modulation(FPSM) in power converter is proposed in this paper, which is based on Pulse Skip Modulation(PSM) mode proposed by authors recently. PSM is a novel modulation mode in power converter, which has...
2005, 27(5): 753-756.
Abstract:
An optimal approach for enhancing a speech signal degraded by uncorrelated stationary additive noise, which exploits auditory perception properties, is proposed. The speech spectra estimate is performed in two cases: noisy speech spectra for noise ma...
An optimal approach for enhancing a speech signal degraded by uncorrelated stationary additive noise, which exploits auditory perception properties, is proposed. The speech spectra estimate is performed in two cases: noisy speech spectra for noise ma...
2005, 27(5): 827-834.
Abstract:
MANET is a multi-hop temporary autonomous system of mobile nodes equipped with wireless transmitters and receivers without the aid of any current network infrastructure. Batteries typically power hosts in MANET, so energy conservation strategy is a c...
MANET is a multi-hop temporary autonomous system of mobile nodes equipped with wireless transmitters and receivers without the aid of any current network infrastructure. Batteries typically power hosts in MANET, so energy conservation strategy is a c...
