Email alert
2010 Vol. 32, No. 3
Display Method:
2010, 32(3): 509-514.
doi: 10.3724/SP.J.1146.2009.01066
Abstract:
Affinity Propagation (AP) clustering is not fit to deal with multi-scale data cluster as well as the arbitrary shape cluster issue. Therefore, an improved affinity propagation clustering algorithm AP-VSM (Affinity Propagation based on Variable-Simila...
Affinity Propagation (AP) clustering is not fit to deal with multi-scale data cluster as well as the arbitrary shape cluster issue. Therefore, an improved affinity propagation clustering algorithm AP-VSM (Affinity Propagation based on Variable-Simila...
2010, 32(3): 515-521.
doi: 10.3724/SP.J.1146.2009.00309
Abstract:
As a new computational intelligence method, the Artificial Immune Network (AIN) is widely applied to pattern recognition and data classification. Existing artificial immune network algorithms for classifier have two major limitations: one is the scal...
As a new computational intelligence method, the Artificial Immune Network (AIN) is widely applied to pattern recognition and data classification. Existing artificial immune network algorithms for classifier have two major limitations: one is the scal...
2010, 32(3): 522-527.
doi: 10.3724/SP.J.1146.2009.00249
Abstract:
Aiming at information fusion problem under complex environment, an intellectualized information fusion model, NFE model, which is an organic combination of Neural network, Fuzzy reasoning and Expert system is proposed. The necessity of constructing a...
Aiming at information fusion problem under complex environment, an intellectualized information fusion model, NFE model, which is an organic combination of Neural network, Fuzzy reasoning and Expert system is proposed. The necessity of constructing a...
2010, 32(3): 528-532.
doi: 10.3724/SP.J.1146.2008.00275
Abstract:
In this paper, a modified Gaussian Mixed Model (GMM) with an embedded Auto-Associate Neural Network (AANN) is proposed. It integrates the merits of GMM and AANN. GMM and AANN as a whole are trained by means of Maximum Likelihood (ML). In the process ...
In this paper, a modified Gaussian Mixed Model (GMM) with an embedded Auto-Associate Neural Network (AANN) is proposed. It integrates the merits of GMM and AANN. GMM and AANN as a whole are trained by means of Maximum Likelihood (ML). In the process ...
2010, 32(3): 533-538.
doi: 10.3724/SP.J.1146.2009.00352
Abstract:
Due to the defects of high complexity and instability convergence performance in the array signal adaptive canceller under the correlated interference, an enhanced array signal multistage cascaded canceller is proposed by substituting the weights of ...
Due to the defects of high complexity and instability convergence performance in the array signal adaptive canceller under the correlated interference, an enhanced array signal multistage cascaded canceller is proposed by substituting the weights of ...
2010, 32(3): 539-543.
doi: 10.3724/SP.J.1146.2009.00235
Abstract:
A novel simplified Maximum Likelihood (ML) detection algorithm based on noise analysis is proposed for Vertical-Bell Labs Layered Space-Time (V-BLAST) system. This algorithm chooses the signal points near the reference line in a multi-dimension space...
A novel simplified Maximum Likelihood (ML) detection algorithm based on noise analysis is proposed for Vertical-Bell Labs Layered Space-Time (V-BLAST) system. This algorithm chooses the signal points near the reference line in a multi-dimension space...
2010, 32(3): 544-547.
doi: 10.3724/SP.J.1146.2008.01006
Abstract:
This paper firstly studies parameter estimation issue directly based on FFT. Thereby, the relationship between the frequency and phase estimation is exposed. Subsequently, the estimation error formula of phase difference arithmetic are deduced and va...
This paper firstly studies parameter estimation issue directly based on FFT. Thereby, the relationship between the frequency and phase estimation is exposed. Subsequently, the estimation error formula of phase difference arithmetic are deduced and va...
2010, 32(3): 548-553.
doi: 10.3724/SP.J.1146.2009.00211
Abstract:
The longest axis in coherence region, which gives the largest distance between any two coherences, is significant in forestry applications using coherence scattering model, because it reflects the linear variation of complex coherences with the polar...
The longest axis in coherence region, which gives the largest distance between any two coherences, is significant in forestry applications using coherence scattering model, because it reflects the linear variation of complex coherences with the polar...
2010, 32(3): 554-558.
doi: 10.3724/SP.J.1146.2009.00444
Abstract:
The issue of micro-Doppler signal separation from collected data of targets with micro-motion structures is addressed. The signal mode for target with micro-motion structures is analyzed and the results show that the Doppler frequency of main body is...
2010, 32(3): 559-563.
doi: 10.3724/SP.J.1146.2009.00251
Abstract:
The mathematical expression of Continuous-Chaos Frequency-Modulating Signal (CCFMS) is given. The auto-correlation function and root-mean-square bandwidth of CCFMS are derived in theory. The results show that autocorrelation function of CCFMS has exc...
The mathematical expression of Continuous-Chaos Frequency-Modulating Signal (CCFMS) is given. The auto-correlation function and root-mean-square bandwidth of CCFMS are derived in theory. The results show that autocorrelation function of CCFMS has exc...
2010, 32(3): 564-569.
doi: 10.3724/SP.J.1146.2009.00257
Abstract:
A new method for detection of multi-target in wideband signal is proposed. Firstly the adjacent correlation is employed to decrease the order of the echoes. Then the Ambiguity function is applied to the auto-term of the result of the adjacent correla...
A new method for detection of multi-target in wideband signal is proposed. Firstly the adjacent correlation is employed to decrease the order of the echoes. Then the Ambiguity function is applied to the auto-term of the result of the adjacent correla...
2010, 32(3): 570-574.
doi: 10.3724/SP.J.1146.2008.00797
Abstract:
The echo waves of radar received consist of direct wave and multipath wave which is reflected from earth (sea) surface and coherent with direct wave. Two new height finding algorithms using improved Toeplitz technique at low-angle environment are pre...
The echo waves of radar received consist of direct wave and multipath wave which is reflected from earth (sea) surface and coherent with direct wave. Two new height finding algorithms using improved Toeplitz technique at low-angle environment are pre...
2010, 32(3): 575-581.
doi: 10.3724/SP.J.1146.2008.00641
Abstract:
An ultra-wideband orthogonal Hermite pulse is an appropriate family of pulses that can represent the commonly-used waveforms in through-the-wall surveillance radar. It has advantages of flexible design，high spectrum utilization and simple design. An ...
An ultra-wideband orthogonal Hermite pulse is an appropriate family of pulses that can represent the commonly-used waveforms in through-the-wall surveillance radar. It has advantages of flexible design，high spectrum utilization and simple design. An ...
2010, 32(3): 582-586.
doi: 10.3724/SP.J.1146.2009.00259
Abstract:
When reconstructing elevation-velocity image, the observation data obtained from differential SAR tomography in baseline-time plane does not follow uniform distribution. If the elevation-velocity image of multiple scatterers is obtained using two-dim...
When reconstructing elevation-velocity image, the observation data obtained from differential SAR tomography in baseline-time plane does not follow uniform distribution. If the elevation-velocity image of multiple scatterers is obtained using two-dim...
2010, 32(3): 587-592.
doi: 10.3724/SP.J.1146.2009.00283
Abstract:
The large range migration produced by missile diving acceleration flight make SAR image difficult. This paper establishes the echo model of the missile-borne SAR by using the high order range model based on the characters of the missile movements. Co...
The large range migration produced by missile diving acceleration flight make SAR image difficult. This paper establishes the echo model of the missile-borne SAR by using the high order range model based on the characters of the missile movements. Co...
2010, 32(3): 593-598.
doi: 10.3724/SP.J.1146.2009.00472
Abstract:
SAR echo signal in high squint mode features large range walk and small range curvature. An improved CS imaging algorithm based on range-walk removal is proposed. First, range-walk is removed in time domain. Second, range curvature is corrected in fr...
SAR echo signal in high squint mode features large range walk and small range curvature. An improved CS imaging algorithm based on range-walk removal is proposed. First, range-walk is removed in time domain. Second, range curvature is corrected in fr...
2010, 32(3): 599-603.
doi: 10.3724/SP.J.1146.2009.00197
Abstract:
Spotlight SAR is an efficiency way to obtain high resolution radar image. The non-stability of the aircraft motion during the long synthetic aperture time can make the image suffer the severe defocus, and there is phase error in the range direction i...
Spotlight SAR is an efficiency way to obtain high resolution radar image. The non-stability of the aircraft motion during the long synthetic aperture time can make the image suffer the severe defocus, and there is phase error in the range direction i...
2010, 32(3): 604-608.
doi: 10.3724/SP.J.1146.2009.00321
Abstract:
A new decorrelation algorithm based on one single snapshot is proposed for Direction-Of-Arrival (DOA) estimation of coherent signals on a ULA, which reconstructs a Toeplitz matrix using the observed data vector directly. It is proved that the rank of...
A new decorrelation algorithm based on one single snapshot is proposed for Direction-Of-Arrival (DOA) estimation of coherent signals on a ULA, which reconstructs a Toeplitz matrix using the observed data vector directly. It is proved that the rank of...
2010, 32(3): 609-612.
doi: 10.3724/SP.J.1146.2009.00208
Abstract:
This paper presents a method to construct quasi-cyclic LDPC codes from prime fields. This method is a generalization of a method proposed by Lan et al to construct quasi-cyclic LDPC codes based on finite fields, and gives a much larger class of quasi...
This paper presents a method to construct quasi-cyclic LDPC codes from prime fields. This method is a generalization of a method proposed by Lan et al to construct quasi-cyclic LDPC codes based on finite fields, and gives a much larger class of quasi...
2010, 32(3): 613-616.
doi: 10.3724/SP.J.1146.2009.00160
Abstract:
This paper first presents Belief Propagation (BP) iteration algorithm in LDPC code-based public-key cryptosystems, and develops the necessary condition of private key if the probability of plaintext is equal. Then the necessary and sufficient conditi...
This paper first presents Belief Propagation (BP) iteration algorithm in LDPC code-based public-key cryptosystems, and develops the necessary condition of private key if the probability of plaintext is equal. Then the necessary and sufficient conditi...
2010, 32(3): 617-622.
doi: 10.3724/SP.J.1146.2009.00335
Abstract:
In multiuser MIMO communication networks, a new amplify-and-forward two-way relaying scheme is proposed employing OFDMA for the multiple access transmission in the first time slot and OFDM/SDMA for the broadcast transmission in the second time slot t...
In multiuser MIMO communication networks, a new amplify-and-forward two-way relaying scheme is proposed employing OFDMA for the multiple access transmission in the first time slot and OFDM/SDMA for the broadcast transmission in the second time slot t...
2010, 32(3): 623-628.
doi: 10.3724/SP.J.1146.2009.00296
Abstract:
More than an adaptive system, the cognitive radio system is an intelligent system. The Q-Learning of the intelligent control theory is adopted in the paper, to solve the sensing task allocation problem among cognitive users. And a Q-Learning based se...
More than an adaptive system, the cognitive radio system is an intelligent system. The Q-Learning of the intelligent control theory is adopted in the paper, to solve the sensing task allocation problem among cognitive users. And a Q-Learning based se...
2010, 32(3): 629-632.
doi: 10.3724/SP.J.1146.2009.00612
Abstract:
In this paper, one sensing-slots scheduling scheme is proposed by using cross-layer design based on IEEE802.22 draft standard. In order to improve the whole system performance, the parameters of TSS scheme in current IEEE802.22 draft are further stud...
In this paper, one sensing-slots scheduling scheme is proposed by using cross-layer design based on IEEE802.22 draft standard. In order to improve the whole system performance, the parameters of TSS scheme in current IEEE802.22 draft are further stud...
2010, 32(3): 633-637.
doi: 10.3724/SP.J.1146.2009.00163
Abstract:
This paper addresses the issue of joint Maximum-Likelihood (ML) time-frequency synchronization and channel estimation for Multiple-Input Multiple-Output (MIMO) systems. The resulting joint ML estimation requires solving a maximization problem with no...
This paper addresses the issue of joint Maximum-Likelihood (ML) time-frequency synchronization and channel estimation for Multiple-Input Multiple-Output (MIMO) systems. The resulting joint ML estimation requires solving a maximization problem with no...
2010, 32(3): 638-642.
doi: 10.3724/SP.J.1146.2009.00328
Abstract:
In this paper, an improved water-filling algorithm is proposed for the problem of Discrete Bit Allocation DBA in OFDM systems. The bit-water-level, defined in this paper as the water-filling level under which the power allocated to a certain sub-carr...
In this paper, an improved water-filling algorithm is proposed for the problem of Discrete Bit Allocation DBA in OFDM systems. The bit-water-level, defined in this paper as the water-filling level under which the power allocated to a certain sub-carr...
2010, 32(3): 643-648.
doi: 10.3724/SP.J.1146.2009.00332
Abstract:
Clustering is the main framework of large scale Ad Hoc networks, and one of its key technologies is spectrum allocation. In this paper, a novel three-level market-based scheme of spectrum allocation is proposed for cognitive clustered Ad Hoc networks...
Clustering is the main framework of large scale Ad Hoc networks, and one of its key technologies is spectrum allocation. In this paper, a novel three-level market-based scheme of spectrum allocation is proposed for cognitive clustered Ad Hoc networks...
2010, 32(3): 649-654.
doi: 10.3724/SP.J.1146.2009.00329
Abstract:
As the huge computational loads of panoramic video processing, most of the embedded panoramic video processing system are based on multi-cores. The problem of high-speed data communication between multi-cores must be solved. A high-speed data communi...
As the huge computational loads of panoramic video processing, most of the embedded panoramic video processing system are based on multi-cores. The problem of high-speed data communication between multi-cores must be solved. A high-speed data communi...
2010, 32(3): 655-659.
doi: 10.3724/SP.J.1146.2009.00253
Abstract:
Set out from the evolution to all-optical transparent infrastructure and to service-orient characteristic, the researches on impairment-aware routing and wavelength assignment algorithms are surveyed and analyzed. Three new dynamic impairment-aware r...
Set out from the evolution to all-optical transparent infrastructure and to service-orient characteristic, the researches on impairment-aware routing and wavelength assignment algorithms are surveyed and analyzed. Three new dynamic impairment-aware r...
2010, 32(3): 660-665.
doi: 10.3724/SP.J.1146.2009.00181
Abstract:
While current research on service context mainly focuses on service quality and seldom consider personal terminal environment, a terminal environment related context named Terminal Service Context is proposed, which could provide essential informatio...
While current research on service context mainly focuses on service quality and seldom consider personal terminal environment, a terminal environment related context named Terminal Service Context is proposed, which could provide essential informatio...
2010, 32(3): 666-670.
doi: 10.3724/SP.J.1146.2009.00190
Abstract:
This paper studies encapsulated packet length of circuit traffic in the multi-service transport multi- protocol label switching network, which based on ITU-T standards. And the paper compared the performance of the network according to different TDM ...
This paper studies encapsulated packet length of circuit traffic in the multi-service transport multi- protocol label switching network, which based on ITU-T standards. And the paper compared the performance of the network according to different TDM ...
2010, 32(3): 671-676.
doi: 10.3724/SP.J.1146.2009.00186
Abstract:
Most of network link parameters inference methods assume that link states are stationary during measurement period, and can not obtain time-varying characteristics of link parameters. In this paper, a novel nonstationary internal loss tomography meth...
Most of network link parameters inference methods assume that link states are stationary during measurement period, and can not obtain time-varying characteristics of link parameters. In this paper, a novel nonstationary internal loss tomography meth...
2010, 32(3): 677-681.
doi: 10.3724/SP.J.1146.2009.00262
Abstract:
A new data delivery scheme-PRD (Probability Replication Delivery scheme) is proposed for pervasive data gathering in DTMSN (Delay Tolerant Mobile Sensor Networks) that networks with intermittent connectivity in space. PRD consists of two key componen...
A new data delivery scheme-PRD (Probability Replication Delivery scheme) is proposed for pervasive data gathering in DTMSN (Delay Tolerant Mobile Sensor Networks) that networks with intermittent connectivity in space. PRD consists of two key componen...
2010, 32(3): 682-686.
doi: 10.3724/SP.J.1146.2009.00300
Abstract:
A frequent pattern mining algorithm FPM (Frequent Pattern Mining) is proposed. FPM not only considered the frequency but also the distribution of the frequent pattern along the time series. Based on these different types of frequent patterns, MAMC (M...
A frequent pattern mining algorithm FPM (Frequent Pattern Mining) is proposed. FPM not only considered the frequency but also the distribution of the frequent pattern along the time series. Based on these different types of frequent patterns, MAMC (M...
2010, 32(3): 687-692.
doi: 10.3724/SP.J.1146.2009.01085
Abstract:
A kind of Rekeying Algorithm based on Orbital Cluster (RAOC) is proposed in the Low Earth Orbit (LEO) satellite network. The LEO satellite network is divided into different clusters according to the characteristics of the LEO satellite network in RAO...
A kind of Rekeying Algorithm based on Orbital Cluster (RAOC) is proposed in the Low Earth Orbit (LEO) satellite network. The LEO satellite network is divided into different clusters according to the characteristics of the LEO satellite network in RAO...
2010, 32(3): 693-699.
doi: 10.3724/SP.J.1146.2009.00287
Abstract:
For most present threshold signature schemes, sub-sign member can not sign a message anonymously or theirs anonymity is very weak. To improve their anonymity, a strong anonymity (n, t) threshold signature scheme based on DAA (Direct Anonymous Attesta...
For most present threshold signature schemes, sub-sign member can not sign a message anonymously or theirs anonymity is very weak. To improve their anonymity, a strong anonymity (n, t) threshold signature scheme based on DAA (Direct Anonymous Attesta...
2010, 32(3): 700-704.
doi: 10.3724/SP.J.1146.2009.00214
Abstract:
For Chinese Part-Of-Speech(POS) tagging, word segmentation is a preliminary step. To reduce accumulated errors between two steps and improve the segmentation performance by utilizing POS information, segmentation and POS tagging can be performed simu...
For Chinese Part-Of-Speech(POS) tagging, word segmentation is a preliminary step. To reduce accumulated errors between two steps and improve the segmentation performance by utilizing POS information, segmentation and POS tagging can be performed simu...
Reducing Undetected Error Rate of CRC Coding Based on Lossless Compression and Implement in Circuits
2010, 32(3): 705-709.
doi: 10.3724/SP.J.1146.2009.00255
Abstract:
The Cyclic Redundancy Checking (CRC) is widely used in many applications. For a certain format of the code, the error undetected probability is nearly a constant. But more bits of the information take more chances to burst errors. This paper proposes...
The Cyclic Redundancy Checking (CRC) is widely used in many applications. For a certain format of the code, the error undetected probability is nearly a constant. But more bits of the information take more chances to burst errors. This paper proposes...
2010, 32(3): 710-713.
doi: 10.3724/SP.J.1146.2009.00149
Abstract:
The phenomena of a high order mode oscillation in a broadband klystron are described in this paper. Some methods are discussed for suppressing parasitical mode oscillation in klystron resonant cavity. One new method is used to eliminate the oscillati...
The phenomena of a high order mode oscillation in a broadband klystron are described in this paper. Some methods are discussed for suppressing parasitical mode oscillation in klystron resonant cavity. One new method is used to eliminate the oscillati...
2010, 32(3): 728-731.
doi: 10.3724/SP.J.1146.2009.00120
Abstract:
A clustering algorithm, based on ant colony optimization algorithm, is proposed, and the stationary target can be detected without prior information. This algorithm is used in practical time difference location system and its performance is demonstra...
A clustering algorithm, based on ant colony optimization algorithm, is proposed, and the stationary target can be detected without prior information. This algorithm is used in practical time difference location system and its performance is demonstra...
2010, 32(3): 732-736.
doi: 10.3724/SP.J.1146.2009.00129
Abstract:
Based on the analysis of Short Time Fourier Transform(STFT) and Wigner-Vill Transform(WVT) for Loran-C signal, influence of SNR at the antenna input, SGR(Sky-wave to Ground-wave Ratio) and phase difference on STFT and WVT for Loran-C signal are analy...
Based on the analysis of Short Time Fourier Transform(STFT) and Wigner-Vill Transform(WVT) for Loran-C signal, influence of SNR at the antenna input, SGR(Sky-wave to Ground-wave Ratio) and phase difference on STFT and WVT for Loran-C signal are analy...
2010, 32(3): 737-741.
doi: 10.3724/SP.J.1146.2009.00061
Abstract:
-Linear Feedback Shift Register (-LFSR) is a word-oriented feedback shift register, which has a better tradeoff between the security and efficiency. The sequence generated by -LFSR is called the -linear recurrence sequence and its characteristic poly...
-Linear Feedback Shift Register (-LFSR) is a word-oriented feedback shift register, which has a better tradeoff between the security and efficiency. The sequence generated by -LFSR is called the -linear recurrence sequence and its characteristic poly...
2010, 32(3): 742-746.
doi: 10.3724/SP.J.1146.2009.00198
Abstract:
A novel wideband omnidirectioanl planar antenna comprised two back-to-back dipoles printed on a dielectric substrate which use as unit of pattern reconfigurable antenna array is presented. The presented antenna shows a wide impedance bandwidth about ...
A novel wideband omnidirectioanl planar antenna comprised two back-to-back dipoles printed on a dielectric substrate which use as unit of pattern reconfigurable antenna array is presented. The presented antenna shows a wide impedance bandwidth about ...
2010, 32(3): 747-749.
doi: 10.3724/SP.J.1146.2009.00204
Abstract:
A new algorithm for efficient computation of the Modulated Complex Lapped Transform (MCLT) with arbitrary windowing function is presented. For the MCLT of length-2M input data sequence, the proposed method is based on computing a length-2M type-II ge...
A new algorithm for efficient computation of the Modulated Complex Lapped Transform (MCLT) with arbitrary windowing function is presented. For the MCLT of length-2M input data sequence, the proposed method is based on computing a length-2M type-II ge...
2010, 32(3): 750-754.
doi: 10.3724/SP.J.1146.2009.00119
Abstract:
Crowd object segmentation is a key issue of the object tracking and recognition in multiple cameras. Human rough models with position, scale and pose information are constructed and then get the corresponding models by using Bayesian model. Then, the...
Crowd object segmentation is a key issue of the object tracking and recognition in multiple cameras. Human rough models with position, scale and pose information are constructed and then get the corresponding models by using Bayesian model. Then, the...
2010, 32(3): 755-758.
doi: 10.3724/SP.J.1146.2009.00704
Abstract:
Considering spatial and temporal redundancy of data and demand of saving energy in Wireless Sensor Networks (WSN), a One-Dimensional Linear Regression model based Spatial and Temporal(ODLRST) data compression algorithm, is proposed. By eliminating te...
Considering spatial and temporal redundancy of data and demand of saving energy in Wireless Sensor Networks (WSN), a One-Dimensional Linear Regression model based Spatial and Temporal(ODLRST) data compression algorithm, is proposed. By eliminating te...
2010, 32(3): 759-762.
doi: 10.3724/SP.J.1146.2009.01096
Abstract:
The scheme of incremental cooperation transmission and its energy efficiency in wireless sensor networks are studied in this paper. Two important issues including when to cooperate and performance of cooperation are also solved. The expressions of en...
The scheme of incremental cooperation transmission and its energy efficiency in wireless sensor networks are studied in this paper. Two important issues including when to cooperate and performance of cooperation are also solved. The expressions of en...
2010, 32(3): 714-727.
doi: 10.3724/SP.J.1146.2009.00751
Abstract:
As a programmable logic device, Field Programmable Gate Array(FPGA)has evolved from merely a peripheral component in an electronic design to become a core processing element of digital systems over the last two decades. It finds extensive application...
As a programmable logic device, Field Programmable Gate Array(FPGA)has evolved from merely a peripheral component in an electronic design to become a core processing element of digital systems over the last two decades. It finds extensive application...
