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2009 Vol. 31, No. 12
Display Method:
2009, 31(12): 2795-2800.
doi: 10.3724/SP.J.1146.2008.01793
Abstract:
In this paper, the issue of robust protection is investigated in WDM networks under the hose uncertain traffic model. Based on Valiant Load Balancing (VLB) and shared protection, a segment protection algorithm called VLB-SSP (VLB-based Shared Segment...
In this paper, the issue of robust protection is investigated in WDM networks under the hose uncertain traffic model. Based on Valiant Load Balancing (VLB) and shared protection, a segment protection algorithm called VLB-SSP (VLB-based Shared Segment...
2009, 31(12): 2801-2806.
doi: 10.3724/SP.J.1146.2008.01766
Abstract:
An adaptive dynamic spectrum allocation scheme among multi-cells in cognitive radio system is proposed. Firstly, the method presents the predicting scheme of idle period of each licensed spectrum units that can be used by cognitive radio, based on th...
An adaptive dynamic spectrum allocation scheme among multi-cells in cognitive radio system is proposed. Firstly, the method presents the predicting scheme of idle period of each licensed spectrum units that can be used by cognitive radio, based on th...
2009, 31(12): 2807-2812.
doi: 10.3724/SP.J.1146.2008.01596
Abstract:
For wireless sensor networks, the energy of sensor node is very limited, and there are a lot of redundant nodes when it is densely deployed. Therefore, a 3D coverage scheme based on hibernation of redundant nodes and phased waking-up strategy for wir...
For wireless sensor networks, the energy of sensor node is very limited, and there are a lot of redundant nodes when it is densely deployed. Therefore, a 3D coverage scheme based on hibernation of redundant nodes and phased waking-up strategy for wir...
2009, 31(12): 2813-2818.
doi: 10.3724/SP.J.1146.2008.01556
Abstract:
Broadcast is a common operation in multi-hop wireless networks. However, previous schemes either have much transmission redundancy or cost too much overhead. In this paper, the minimal number of forwarding nodes needed to cover a network is analyzed....
Broadcast is a common operation in multi-hop wireless networks. However, previous schemes either have much transmission redundancy or cost too much overhead. In this paper, the minimal number of forwarding nodes needed to cover a network is analyzed....
2009, 31(12): 2819-2823.
doi: 10.3724/SP.J.1146.2008.00112
Abstract:
In this paper, a distributed moving horizon state estimation approach is presented based on multi-bit quantized data. Each sensor node preserves a list of thresholds which are used to quantize observations into multiple bits. After receiving these bi...
In this paper, a distributed moving horizon state estimation approach is presented based on multi-bit quantized data. Each sensor node preserves a list of thresholds which are used to quantize observations into multiple bits. After receiving these bi...
2009, 31(12): 2824-2828.
doi: 10.3724/SP.J.1146.2008.01741
Abstract:
Inter Symbol Interference (ISI) will increase when transmission rate of an Impulse Radio-Ultra Wide Band (IR-UWB) system is getting larger, which will worsen Bit Error Rate (BER), restrict the highest realizable transmission rate. In order to suppres...
Inter Symbol Interference (ISI) will increase when transmission rate of an Impulse Radio-Ultra Wide Band (IR-UWB) system is getting larger, which will worsen Bit Error Rate (BER), restrict the highest realizable transmission rate. In order to suppres...
2009, 31(12): 2829-2833.
doi: 10.3724/SP.J.1146.2008.01654
Abstract:
The performance in cooperative communication depends much on efficient resource allocation such as relay selection and power control. In this paper, a game-theoretical power control algorithm with relay selection is proposed. A payoff function is def...
The performance in cooperative communication depends much on efficient resource allocation such as relay selection and power control. In this paper, a game-theoretical power control algorithm with relay selection is proposed. A payoff function is def...
2009, 31(12): 2834-2837.
doi: 10.3724/SP.J.1146.2008.01565
Abstract:
The residual frequency and phase offset will make obvious degradations on the Turbo decoding performance under low SNR conditions, and it must introduce some coded-aided carrier synchronization algorithm for the phase estimation. In this paper, an im...
The residual frequency and phase offset will make obvious degradations on the Turbo decoding performance under low SNR conditions, and it must introduce some coded-aided carrier synchronization algorithm for the phase estimation. In this paper, an im...
2009, 31(12): 2838-2842.
doi: 10.3724/SP.J.1146.2008.01650
Abstract:
The design of transceivers in relaying systems is studied with full Channel State Information (CSI) or partial CSI at the relay. Based on the acquired CSI，the relay filters and retransmits its received signals and the destination recovers the origina...
The design of transceivers in relaying systems is studied with full Channel State Information (CSI) or partial CSI at the relay. Based on the acquired CSI，the relay filters and retransmits its received signals and the destination recovers the origina...
2009, 31(12): 2843-2847.
doi: 10.3724/SP.J.1146.2008.01041
Abstract:
Traditional power spectrum detector is based on the assumption that mean and variance of background noise spectrum do not vary with frequency. However, actual noise spectrums generally do not meet the hypothesis in non-cooperative satellite communica...
Traditional power spectrum detector is based on the assumption that mean and variance of background noise spectrum do not vary with frequency. However, actual noise spectrums generally do not meet the hypothesis in non-cooperative satellite communica...
2009, 31(12): 2848-2852.
doi: 10.3724/SP.J.1146.2008.00224
Abstract:
Stepped Frequency Chirp Signal (SFCS) is one of usually used signals in high-resolution radar. It is a combination of chirp signal and stepped frequency continuous waveform, and has advantages of the both signals. In the design of real radar system, ...
Stepped Frequency Chirp Signal (SFCS) is one of usually used signals in high-resolution radar. It is a combination of chirp signal and stepped frequency continuous waveform, and has advantages of the both signals. In the design of real radar system, ...
2009, 31(12): 2853-2857.
doi: 10.3724/SP.J.1146.2008.01236
Abstract:
In this paper, the frequency domain characteristic and time-varying characteristic of the RCS (Radar Cross Section) of aircraft wake vortices in clear air are analyzed. A LMP (Locally Most Powerful) detector is introduced for detection of aircraft wa...
In this paper, the frequency domain characteristic and time-varying characteristic of the RCS (Radar Cross Section) of aircraft wake vortices in clear air are analyzed. A LMP (Locally Most Powerful) detector is introduced for detection of aircraft wa...
2009, 31(12): 2858-2863.
doi: 10.3724/SP.J.1146.2008.01407
Abstract:
Considering issue of target-aspect sensitivities in the waveform design for the recognition of broadband radar targets, a novel method termed Multi Eigen-Subspace (MES) is proposed in the additional of colored noise. The optimization is done via sele...
Considering issue of target-aspect sensitivities in the waveform design for the recognition of broadband radar targets, a novel method termed Multi Eigen-Subspace (MES) is proposed in the additional of colored noise. The optimization is done via sele...
2009, 31(12): 2864-2868.
doi: 10.3724/SP.J.1146.2008.01612
Abstract:
The midcourse missile imaging method is the key technology for the missile-defense system. Conventional ISAR imaging methods require a uniform function to compensate the phase of the echo. The function is difficult to acquire in the wideband case, so...
The midcourse missile imaging method is the key technology for the missile-defense system. Conventional ISAR imaging methods require a uniform function to compensate the phase of the echo. The function is difficult to acquire in the wideband case, so...
2009, 31(12): 2869-2875.
doi: 10.3724/SP.J.1146.2008.01798
Abstract:
A novel criterion for thinning array optimization based on optimal polarization (minimization of the cross-polarization level) is proposed to suppress the cross-polarization level and solve the problem of grating lobes arisen from thinning array in m...
A novel criterion for thinning array optimization based on optimal polarization (minimization of the cross-polarization level) is proposed to suppress the cross-polarization level and solve the problem of grating lobes arisen from thinning array in m...
2009, 31(12): 2876-2880.
doi: 10.3724/SP.J.1146.2008.01435
Abstract:
Mode S signals are exposed to heavy A/C fruits when used in multilateration and ADS-B systems. Current decoding methods will lead to many decoding errors and low confidence declaration. Mode S decoding techniques are introduced in this paper. There a...
Mode S signals are exposed to heavy A/C fruits when used in multilateration and ADS-B systems. Current decoding methods will lead to many decoding errors and low confidence declaration. Mode S decoding techniques are introduced in this paper. There a...
2009, 31(12): 2881-2885.
doi: 10.3724/SP.J.1146.2008.01707
Abstract:
In all the algorithms of the ship detection of SAR images, two parameter CFAR detector uses three moving windows: target window, protect window and background window, the sizes of the three windows and the moving step need to be trained, So it is qui...
In all the algorithms of the ship detection of SAR images, two parameter CFAR detector uses three moving windows: target window, protect window and background window, the sizes of the three windows and the moving step need to be trained, So it is qui...
2009, 31(12): 2886-2891.
doi: 10.3724/SP.J.1146.2008.01684
Abstract:
In this paper, a new image fusion approach is presented based on correspondence analysis to sharpen the multispectral images with the panchromatic image. First, the original multispectral images are transformed into component space by correspondence ...
In this paper, a new image fusion approach is presented based on correspondence analysis to sharpen the multispectral images with the panchromatic image. First, the original multispectral images are transformed into component space by correspondence ...
2009, 31(12): 2892-2896.
doi: 10.3724/SP.J.1146.2008.01675
Abstract:
This paper proposes a denoising method of hyperspectral super-dimensional data based on Contourlet transform and principal component analysis. At first the sparse representation of images is accomplished with Contourlet transform. Then the Contourlet...
This paper proposes a denoising method of hyperspectral super-dimensional data based on Contourlet transform and principal component analysis. At first the sparse representation of images is accomplished with Contourlet transform. Then the Contourlet...
2009, 31(12): 2897-2900.
doi: 10.3724/SP.J.1146.2008.01701
Abstract:
Linear complexity is an important parameter of sequences security. In this paper, the linear complexity properties of primitive -LFSR sequences are studied. Firstly, the bounds of the linear complexity for one n stages primitive -LFSR sequence is giv...
Linear complexity is an important parameter of sequences security. In this paper, the linear complexity properties of primitive -LFSR sequences are studied. Firstly, the bounds of the linear complexity for one n stages primitive -LFSR sequence is giv...
2009, 31(12): 2901-2906.
doi: 10.3724/SP.J.1146.2008.01498
Abstract:
In this paper, the Chrestenson spectrum and the autocorrelation functions of Rotation Symmetric(RotS) functions are researched. The polynomials of RotS functions have special properties, by constructing matrixes, the relationship of the truth table, ...
In this paper, the Chrestenson spectrum and the autocorrelation functions of Rotation Symmetric(RotS) functions are researched. The polynomials of RotS functions have special properties, by constructing matrixes, the relationship of the truth table, ...
2009, 31(12): 2907-2911.
doi: 10.3724/SP.J.1146.2008.01599
Abstract:
Arithmetic code on parallelized MPS(Most Probable Symbol) not only avoids complex operation of classical parallelized arithmetic code, but also does not inflect its basic probability estimation rule since utilizing statistic law of multidimensional b...
Arithmetic code on parallelized MPS(Most Probable Symbol) not only avoids complex operation of classical parallelized arithmetic code, but also does not inflect its basic probability estimation rule since utilizing statistic law of multidimensional b...
2009, 31(12): 2912-2916.
doi: 10.3724/SP.J.1146.2008.01791
Abstract:
For the issue of transmitting nonsinusoidal signal in radio frequency and improving the energy efficiency and bandwidth efficiency in nonsinusoidal communication systems, designing method of orthogonal pulse set in time domain based on Prolate Sphero...
For the issue of transmitting nonsinusoidal signal in radio frequency and improving the energy efficiency and bandwidth efficiency in nonsinusoidal communication systems, designing method of orthogonal pulse set in time domain based on Prolate Sphero...
2009, 31(12): 2917-2921.
doi: 10.3724/SP.J.1146.2008.01572
Abstract:
A concatenated coding scheme is proposed in this paper, which uses Reed-Solomon (RS) product code for outer code and convolutional code for inner code. The interleaving pattern, which is generated according to congruential sequence, is used to rearra...
A concatenated coding scheme is proposed in this paper, which uses Reed-Solomon (RS) product code for outer code and convolutional code for inner code. The interleaving pattern, which is generated according to congruential sequence, is used to rearra...
2009, 31(12): 2922-2925.
doi: 10.3724/SP.J.1146.2008.01717
Abstract:
Quantum error-correcting codes play an important role in not only quantum communication but also quantum computation. Previous work in constructing quantum error-correcting codes focuses on code constructions for symmetric quantum channels, i.e., qub...
Quantum error-correcting codes play an important role in not only quantum communication but also quantum computation. Previous work in constructing quantum error-correcting codes focuses on code constructions for symmetric quantum channels, i.e., qub...
2009, 31(12): 2926-2930.
doi: 10.3724/SP.J.1146.2008.01677
Abstract:
Effective feature extraction is very important when building the smart DOA estimation model. Based on analyzing the correlation function of the array signal, this paper firstly presents using the angles of contiguous array signals correlation functio...
Effective feature extraction is very important when building the smart DOA estimation model. Based on analyzing the correlation function of the array signal, this paper firstly presents using the angles of contiguous array signals correlation functio...
2009, 31(12): 2931-2936.
doi: 10.3724/SP.J.1146.2008.01633
Abstract:
Since standard Capon beamformer is susceptible to the steering vector mismatches of the Signal Of Interest(SOI), robust Capon beamforming based on steering vector error uncertainty set is investigated. In the cases that the practical steering vector ...
Since standard Capon beamformer is susceptible to the steering vector mismatches of the Signal Of Interest(SOI), robust Capon beamforming based on steering vector error uncertainty set is investigated. In the cases that the practical steering vector ...
2009, 31(12): 2937-2940.
doi: 10.3724/SP.J.1146.2008.01716
Abstract:
An adaptive method of fractional Fourier transform based on Least Mean Square (LMS) algorithm is proposed and is used to detect and estimate parameters of multicomponent chirp signals. Through the discrete sampling of continuous inverse fractional Fo...
An adaptive method of fractional Fourier transform based on Least Mean Square (LMS) algorithm is proposed and is used to detect and estimate parameters of multicomponent chirp signals. Through the discrete sampling of continuous inverse fractional Fo...
2009, 31(12): 2941-2947.
doi: 10.3724/SP.J.1146.2008.01553
Abstract:
A novel method based on Least Squares Support Vector Machine (LSSVM) is proposed to extract the Fetal Electrocardiogram (FECG) signal from the abdominal composite signal of the pregnant woman. The Maternal Electrocardiogram (MECG) component in the ab...
A novel method based on Least Squares Support Vector Machine (LSSVM) is proposed to extract the Fetal Electrocardiogram (FECG) signal from the abdominal composite signal of the pregnant woman. The Maternal Electrocardiogram (MECG) component in the ab...
2009, 31(12): 2948-2952.
doi: 10.3724/SP.J.1146.2008.01704
Abstract:
Compressed Sensing is a research focus rising in recent years. On the basis of the signals sparse representation in the KLT domain, this paper proposes an approximate KLT method using template matching and studies on the corresponding compressed spee...
Compressed Sensing is a research focus rising in recent years. On the basis of the signals sparse representation in the KLT domain, this paper proposes an approximate KLT method using template matching and studies on the corresponding compressed spee...
2009, 31(12): 2953-2957.
doi: 10.3724/SP.J.1146.2008.01663
Abstract:
In this paper, the characteristic of approximate backbone is analyzed and an Approximate Backbone guided Reduction Algorithm for Clustering (ABRAC) is proposed. ABRAC works as follows: firstly, multiple local optimal solutions are obtained by an exis...
In this paper, the characteristic of approximate backbone is analyzed and an Approximate Backbone guided Reduction Algorithm for Clustering (ABRAC) is proposed. ABRAC works as follows: firstly, multiple local optimal solutions are obtained by an exis...
2009, 31(12): 2958-2962.
doi: 10.3724/SP.J.1146.2008.01656
Abstract:
2-Dimensional Kernel Discriminant Analysis (2DKDA) can not be performed since its scatter metric matrices are too large. This paper combines the sampling and regrouping images with 2DKDA and gives three kinds of Sampling and Regrouping 2-Dimensional ...
2-Dimensional Kernel Discriminant Analysis (2DKDA) can not be performed since its scatter metric matrices are too large. This paper combines the sampling and regrouping images with 2DKDA and gives three kinds of Sampling and Regrouping 2-Dimensional ...
2009, 31(12): 2963-2968.
doi: 10.3724/SP.J.1146.2008.01578
Abstract:
Generally blind watermarking schemes are more secure in various applications because the cover meshes are absent in the watermark extraction stage, even if they are less robust than non-blind ones. But higher robustness of the blind watermarking sche...
Generally blind watermarking schemes are more secure in various applications because the cover meshes are absent in the watermark extraction stage, even if they are less robust than non-blind ones. But higher robustness of the blind watermarking sche...
2009, 31(12): 2969-2974.
doi: 10.3724/SP.J.1146.2008.01624
Abstract:
This paper describes and compares web-based unsupervised translation disambiguation word model and N-gram model. For acquiring knowledge of disambiguation, both two models put differents queries to search engine and statistic page counts which it ret...
This paper describes and compares web-based unsupervised translation disambiguation word model and N-gram model. For acquiring knowledge of disambiguation, both two models put differents queries to search engine and statistic page counts which it ret...
Information Discriminant Feature Extraction Based on Mutual Information Gradient Optimal Computation
2009, 31(12): 2975-2979.
doi: 10.3724/SP.J.1146.2009.00078
Abstract:
A linear feature extraction method is present with information discriminant analysis, it is based on a feasible computationally feature extraction matrix used mutual information gradient. Firstly, this paper analyzes the limitation for current linear...
A linear feature extraction method is present with information discriminant analysis, it is based on a feasible computationally feature extraction matrix used mutual information gradient. Firstly, this paper analyzes the limitation for current linear...
2009, 31(12): 2980-2983.
doi: 10.3724/SP.J.1146.2009.00132
Abstract:
As the size of VLSI circuits keeps growing, the quality of circuit partitioning for parallel simulation is becoming increasingly crucial. In view of the fact that the present algorithms cannot guarantee the size balance and minimize the cut-signals a...
As the size of VLSI circuits keeps growing, the quality of circuit partitioning for parallel simulation is becoming increasingly crucial. In view of the fact that the present algorithms cannot guarantee the size balance and minimize the cut-signals a...
2009, 31(12): 2984-2987.
doi: 10.3724/SP.J.1146.2008.01784
Abstract:
The data processing in complex cepstrum domain can restrain the echo-like multi-reflection wave. The TDR (Time Domain Reflectometry) waveforms are analyzed in complex cepstrum domain in this paper. By filtering in complex cepstrum domain, the multi-r...
The data processing in complex cepstrum domain can restrain the echo-like multi-reflection wave. The TDR (Time Domain Reflectometry) waveforms are analyzed in complex cepstrum domain in this paper. By filtering in complex cepstrum domain, the multi-r...
2009, 31(12): 2988-2992.
doi: 10.3724/SP.J.1146.2008.01532
Abstract:
All the current mobile beacon-assisted localization algorithms do not make full use of the practical node distribution information and let the mobile landmark travel the entire network, which causes large path length and low beacon utilization ratio....
All the current mobile beacon-assisted localization algorithms do not make full use of the practical node distribution information and let the mobile landmark travel the entire network, which causes large path length and low beacon utilization ratio....
2009, 31(12): 2993-2996.
doi: 10.3724/SP.J.1146.2008.01669
Abstract:
A method based on chaos theory is presented in this paper, to evaluate large-scale network performance using massive traffic measurement. As the periodicity of long-term link utilization measurement and the chaotic nature of short-term link utilizati...
A method based on chaos theory is presented in this paper, to evaluate large-scale network performance using massive traffic measurement. As the periodicity of long-term link utilization measurement and the chaotic nature of short-term link utilizati...
2009, 31(12): 2997-3000.
doi: 10.3724/SP.J.1146.2008.01652
Abstract:
Attacks based on flow may bring tremendous damage to complex networks. In existing works, the cases of nodes attacking are mainly concerned, however, few work is involved to the edges. In this paper, the frangibility of complex networks is discussed ...
Attacks based on flow may bring tremendous damage to complex networks. In existing works, the cases of nodes attacking are mainly concerned, however, few work is involved to the edges. In this paper, the frangibility of complex networks is discussed ...
2009, 31(12): 3001-3005.
doi: 10.3724/SP.J.1146.2008.01489
Abstract:
Probable security is an important criteria for analyzing the security of cryptographic protocols. However, writing and verifying proofs with hand are prone to errors. This paper introduces the game-based approach of writing security proofs and its au...
Probable security is an important criteria for analyzing the security of cryptographic protocols. However, writing and verifying proofs with hand are prone to errors. This paper introduces the game-based approach of writing security proofs and its au...
2009, 31(12): 3006-3009.
doi: 10.3724/SP.J.1146.2008.01843
Abstract:
Considering the defects in the adaptive Chase algorithm, a novel decoding algorithm for block Turbo codes based on the adaptive quantized testing sequences is proposed. This algorithm is employed to investigate the number of testing sequences, select...
Considering the defects in the adaptive Chase algorithm, a novel decoding algorithm for block Turbo codes based on the adaptive quantized testing sequences is proposed. This algorithm is employed to investigate the number of testing sequences, select...
2009, 31(12): 3010-3014.
doi: 10.3724/SP.J.1146.2008.01634
Abstract:
In order to synthesize real video sequence, a visual speech synthesis algorithm based on Chinese visual triphone is proposed. According to Chinese pronunciation principle and the relationship between phoneme and viseme, conception of visual triphone ...
In order to synthesize real video sequence, a visual speech synthesis algorithm based on Chinese visual triphone is proposed. According to Chinese pronunciation principle and the relationship between phoneme and viseme, conception of visual triphone ...
2009, 31(12): 3015-3018.
doi: 10.3724/SP.J.1146.2008.01506
Abstract:
A novel, effective and synthetic analysis method is developed for studying the heat dissipation capability of slow-wave structure. This method, based on some theoretical and experimental research, is applicable to analyze the thermal conduction preci...
A novel, effective and synthetic analysis method is developed for studying the heat dissipation capability of slow-wave structure. This method, based on some theoretical and experimental research, is applicable to analyze the thermal conduction preci...
