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2012 Vol. 34, No. 4
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2012, 34(4): 763-769.
doi: 10.3724/SP.J.1146.2011.01368
Abstract:
Addressing scheme for Internet of Things (IoTs) is proposed based on IPv6 over Low-power Wireless Personal Area Networks (6LoWPAN), for the real-time communication?between Internet and underlying heterogeneous networks based on IEEE 802.15.4. Address...
Addressing scheme for Internet of Things (IoTs) is proposed based on IPv6 over Low-power Wireless Personal Area Networks (6LoWPAN), for the real-time communication?between Internet and underlying heterogeneous networks based on IEEE 802.15.4. Address...
2012, 34(4): 770-775.
doi: 10.3724/SP.J.1146.2011.01002
Abstract:
This paper studies on the issue of physical layer security of MISO Cognitive Radio Networks (CRN) from the Quality of Service (QoS) perspective. By adding a suitable amount of artificial noise into the transmitting signal of the Secondary User Transm...
This paper studies on the issue of physical layer security of MISO Cognitive Radio Networks (CRN) from the Quality of Service (QoS) perspective. By adding a suitable amount of artificial noise into the transmitting signal of the Secondary User Transm...
2012, 34(4): 776-781.
doi: 10.3724/SP.J.1146.2011.00653
Abstract:
A dynamic offset time assignment algorithm based on the measurement of cross traffic on control plane is proposed. This algorithm uses probe burst,s drop ratio as observing variable to determine the core node,s background traffic and assigns offset t...
A dynamic offset time assignment algorithm based on the measurement of cross traffic on control plane is proposed. This algorithm uses probe burst,s drop ratio as observing variable to determine the core node,s background traffic and assigns offset t...
2012, 34(4): 782-786.
doi: 10.3724/SP.J.1146.2011.00301
Abstract:
User clustering is one of the most important problems because of the difference of the frequency spectrum utilization situation from cognitive users. This paper gives the analysis result of correlation between cognitive radio users and also proposes ...
User clustering is one of the most important problems because of the difference of the frequency spectrum utilization situation from cognitive users. This paper gives the analysis result of correlation between cognitive radio users and also proposes ...
2012, 34(4): 787-794.
doi: 10.3724/SP.J.1146.2011.00554
Abstract:
Most existing works on resource allocation in Orthogonal Frequency Division Multiple Access (OFDMA) relaying networks is focused on single cell systems, which ignoring the significant effect of co-channel interference caused by adjacent cells. Howeve...
Most existing works on resource allocation in Orthogonal Frequency Division Multiple Access (OFDMA) relaying networks is focused on single cell systems, which ignoring the significant effect of co-channel interference caused by adjacent cells. Howeve...
2012, 34(4): 795-801.
doi: 10.3724/SP.J.1146.2011.00636
Abstract:
In asynchronous MIMO-OFDM over the selective Rayleigh fading channel, an iterative parallel multi- antenna interference cancellation algorithm based on pre-processing matrix is proposed. Before the signal is transmitted, the symbols are spread over a...
In asynchronous MIMO-OFDM over the selective Rayleigh fading channel, an iterative parallel multi- antenna interference cancellation algorithm based on pre-processing matrix is proposed. Before the signal is transmitted, the symbols are spread over a...
2012, 34(4): 802-806.
doi: 10.3724/SP.J.1146.2011.00562
Abstract:
This paper studies single-cycle polynomials over the integer residue ring Z/(pn) with prime p5 and integer n2, and presents several classes of such single-cycle polynomials. As the research of single-cycle polynomials over Z/(pn) can be reduced to th...
This paper studies single-cycle polynomials over the integer residue ring Z/(pn) with prime p5 and integer n2, and presents several classes of such single-cycle polynomials. As the research of single-cycle polynomials over Z/(pn) can be reduced to th...
2012, 34(4): 807-811.
doi: 10.3724/SP.J.1146.2011.00863
Abstract:
Stream cipher HC-256' is an improved algorithm of HC-256 which is proposed as a candidate to the eSTREAM project. Until now, there has not any cryptanalysis on HC-256'. In this paper, a linear distinguishing attack on HC-256' is presented. This metho...
Stream cipher HC-256' is an improved algorithm of HC-256 which is proposed as a candidate to the eSTREAM project. Until now, there has not any cryptanalysis on HC-256'. In this paper, a linear distinguishing attack on HC-256' is presented. This metho...
2012, 34(4): 812-817.
doi: 10.3724/SP.J.1146.2011.00787
Abstract:
Considering at the trust problem existing in cloud computing environment, a double incentive based on trust and deception detection model CCIDTM (Cloud Computing Incentive and Detection Trust Model) is proposed. The model proposes a set of cloud comp...
Considering at the trust problem existing in cloud computing environment, a double incentive based on trust and deception detection model CCIDTM (Cloud Computing Incentive and Detection Trust Model) is proposed. The model proposes a set of cloud comp...
2012, 34(4): 818-824.
doi: 10.3724/SP.J.1146.2011.00823
Abstract:
This paper focuses on the issue of available bandwidth estimation in wireless multihop path and takes the overall QoS provision as the principle in estimation. Through analyzing and quantitative calculating the interference on the multihop path, the ...
This paper focuses on the issue of available bandwidth estimation in wireless multihop path and takes the overall QoS provision as the principle in estimation. Through analyzing and quantitative calculating the interference on the multihop path, the ...
2012, 34(4): 825-831.
doi: 10.3724/SP.J.1146.2011.00446
Abstract:
Based on probabilistic sensing model, a virtual sensor is constructed by information fusion scheme that fuses sensing measurements of two sensors, which can significantly improve coverage region. Based on the theories, a barrier coverage preserving c...
Based on probabilistic sensing model, a virtual sensor is constructed by information fusion scheme that fuses sensing measurements of two sensors, which can significantly improve coverage region. Based on the theories, a barrier coverage preserving c...
2012, 34(4): 832-837.
doi: 10.3724/SP.J.1146.2011.00859
Abstract:
To improve the speed of the estimation of Direction Of Arrival (DOA), the dimension of the noise subspace is descended by the Singular Value decomposing (SVD) on the intersection of noise subspace and its conjugate one. Then a new method for fast 2-D...
To improve the speed of the estimation of Direction Of Arrival (DOA), the dimension of the noise subspace is descended by the Singular Value decomposing (SVD) on the intersection of noise subspace and its conjugate one. Then a new method for fast 2-D...
2012, 34(4): 838-843.
doi: 10.3724/SP.J.1146.2011.00620
Abstract:
Chaotic Compressive Sensing (ChaCS) is a nonlinear compressive sensing approach using chaos systems. This paper extends the ChaCS to perform the online estimation of sparse time-varying signals. An online estimation structure is proposed and a sparsi...
Chaotic Compressive Sensing (ChaCS) is a nonlinear compressive sensing approach using chaos systems. This paper extends the ChaCS to perform the online estimation of sparse time-varying signals. An online estimation structure is proposed and a sparsi...
2012, 34(4): 844-850.
doi: 10.3724/SP.J.1146.2011.00667
Abstract:
Cellular Automata (CA) and Cellular Automata Transfrom (CAT) are introduced, and a novel watermark algorithm joint JPEG image encoding and cellular automata is proposed. An image watermark is scrambled by Moore CA firstly. And then is embedded into t...
Cellular Automata (CA) and Cellular Automata Transfrom (CAT) are introduced, and a novel watermark algorithm joint JPEG image encoding and cellular automata is proposed. An image watermark is scrambled by Moore CA firstly. And then is embedded into t...
2012, 34(4): 851-857.
doi: 10.3724/SP.J.1146.2011.00851
Abstract:
Based on the similarity measure of evidence, a new method for combining conflicting interval evidence is proposed. Firstly, interval evidence can be transformed into interval-valued Pignistic probability by using the defined extended Pignistic probab...
Based on the similarity measure of evidence, a new method for combining conflicting interval evidence is proposed. Firstly, interval evidence can be transformed into interval-valued Pignistic probability by using the defined extended Pignistic probab...
2012, 34(4): 858-864.
doi: 10.3724/SP.J.1146.2011.00827
Abstract:
In order to improve accuracy of the human detection, this paper proposes the conception of the Window edge of the Gradient of Potential Energy (WGPE) and a fast human detection method based on potential energy. By using sparse-dense gradient potentia...
In order to improve accuracy of the human detection, this paper proposes the conception of the Window edge of the Gradient of Potential Energy (WGPE) and a fast human detection method based on potential energy. By using sparse-dense gradient potentia...
2012, 34(4): 865-870.
doi: 10.3724/SP.J.1146.2011.00858
Abstract:
A tracking algorithm with adaptive association gate is proposed to the maneuvering target tracking in clutters. The algorithm is based on conventional Interacting Multiple Model Probabilistic Data Association (IMM-PDA) algorithm, and the target is as...
A tracking algorithm with adaptive association gate is proposed to the maneuvering target tracking in clutters. The algorithm is based on conventional Interacting Multiple Model Probabilistic Data Association (IMM-PDA) algorithm, and the target is as...
2012, 34(4): 871-877.
doi: 10.3724/SP.J.1146.2011.00796
Abstract:
This paper focus on the detection of floating small targets in high range resolution sea clutter. Floationg targets disarrange the scattering of neighboring sea surface, which results in that the received echoes in the cell targets located satisfy a ...
This paper focus on the detection of floating small targets in high range resolution sea clutter. Floationg targets disarrange the scattering of neighboring sea surface, which results in that the received echoes in the cell targets located satisfy a ...
2012, 34(4): 878-884.
doi: 10.3724/SP.J.1146.2011.00788
Abstract:
This paper presents a novel method for joint parameter estimation of Linear Frequency Modulation (LFM) signals in bistatic Multiple-Input Multiple-Output (MIMO) radar system. A new signal array model of bistatic MIMO radar system is constructed in th...
This paper presents a novel method for joint parameter estimation of Linear Frequency Modulation (LFM) signals in bistatic Multiple-Input Multiple-Output (MIMO) radar system. A new signal array model of bistatic MIMO radar system is constructed in th...
2012, 34(4): 885-890.
doi: 10.3724/SP.J.1146.2011.00687
Abstract:
Traditional Dynamic Programming Track-Before-Detect (DP-TBD) algorithms use only observation data of current frame to associate with merit function and accumulate energy at each stage of data association. The ignorance of targets state relevance amon...
Traditional Dynamic Programming Track-Before-Detect (DP-TBD) algorithms use only observation data of current frame to associate with merit function and accumulate energy at each stage of data association. The ignorance of targets state relevance amon...
2012, 34(4): 891-897.
doi: 10.3724/SP.J.1146.2011.01020
Abstract:
Speckle makes High Resolution Range Profile (HRRP) fluctuate largely within the frame without scatterer Moving Through Range Cell (MTRC). This paper makes use of the matching score to measure the speckles influence on the spectra features of HRRP, su...
Speckle makes High Resolution Range Profile (HRRP) fluctuate largely within the frame without scatterer Moving Through Range Cell (MTRC). This paper makes use of the matching score to measure the speckles influence on the spectra features of HRRP, su...
2012, 34(4): 898-903.
doi: 10.3724/SP.J.1146.2011.00861
Abstract:
To reduce the computational complexity and training samples required of Adaptive Matrix Approach (AMA), a Two-Sided AMA (TS-AMA) for MIMO radar is proposed. The proposed algorithm converts the cost function of AMA into a bi-quadratic one by decomposi...
To reduce the computational complexity and training samples required of Adaptive Matrix Approach (AMA), a Two-Sided AMA (TS-AMA) for MIMO radar is proposed. The proposed algorithm converts the cost function of AMA into a bi-quadratic one by decomposi...
2012, 34(4): 904-909.
doi: 10.3724/SP.J.1146.2011.00847
Abstract:
To solve the problem of Direction Of Departure-Direction Of Arrival (DOD-DOA) estimation in bistatic MIMO radar, a fast method based on joint matrix diagonalization is proposed. First, according to the structure of matched filter output, DOD-DOA esti...
To solve the problem of Direction Of Departure-Direction Of Arrival (DOD-DOA) estimation in bistatic MIMO radar, a fast method based on joint matrix diagonalization is proposed. First, according to the structure of matched filter output, DOD-DOA esti...
Analysis of Impact of Phase Center Variations in Linear Array Antena Downward-looking 3D-SAR Imaging
2012, 34(4): 910-916.
doi: 10.3724/SP.J.1146.2011.00776
Abstract:
The Linear Array Downward-Looking 3D-SAR (LADL 3D-SAR) achieves the ablity of resolving imaging in three dimensions using linear array antennas. The phase center variations of linear array antennas, which is unavoidable under real condition, will lea...
The Linear Array Downward-Looking 3D-SAR (LADL 3D-SAR) achieves the ablity of resolving imaging in three dimensions using linear array antennas. The phase center variations of linear array antennas, which is unavoidable under real condition, will lea...
2012, 34(4): 923-928.
doi: 10.3724/SP.J.1146.2011.00373
Abstract:
Small target detection in sea clutter is a challenging problem. This paper proposes a novel approach to solve it. Edge detection and improved Hough transform are applied to a set of range profiles, which are resulted from re-sampling and smoothing th...
Small target detection in sea clutter is a challenging problem. This paper proposes a novel approach to solve it. Edge detection and improved Hough transform are applied to a set of range profiles, which are resulted from re-sampling and smoothing th...
2012, 34(4): 929-935.
doi: 10.3724/SP.J.1146.2011.00856
Abstract:
This paper studies mainly the fractal property of the real sea clutter in frequency domain and the effects of different parameters to the fractal characteristics of the sea clutter spectrum. Firstly, this paper takes Fractional Brownian Motion (FBM) ...
This paper studies mainly the fractal property of the real sea clutter in frequency domain and the effects of different parameters to the fractal characteristics of the sea clutter spectrum. Firstly, this paper takes Fractional Brownian Motion (FBM) ...
2012, 34(4): 936-942.
doi: 10.3724/SP.J.1146.2011.00811
Abstract:
Space-Time Adaptive Processing (STAP) is an effective method for moving target detection in airborne radar. However, the Doppler frequency will change with time when the target has strong maneuvering, which would degrade the coherent integration perf...
Space-Time Adaptive Processing (STAP) is an effective method for moving target detection in airborne radar. However, the Doppler frequency will change with time when the target has strong maneuvering, which would degrade the coherent integration perf...
2012, 34(4): 943-949.
doi: 10.3724/SP.J.1146.2011.00720
Abstract:
Three dimensional SAR imaging technology based on linear array is one of the most important three dimensional SAR high resolution imaging methods. In this paper, transmit and receive antenna elements are placed to form cross-track thinned downward-lo...
Three dimensional SAR imaging technology based on linear array is one of the most important three dimensional SAR high resolution imaging methods. In this paper, transmit and receive antenna elements are placed to form cross-track thinned downward-lo...
2012, 34(4): 950-955.
doi: 10.3724/SP.J.1146.2011.00918
Abstract:
This paper proposes a new speckle reduction algorithm for Synthetic Aperture Radar (SAR) images. It is based on the Non Local (NL) means filter and improved by Structural SIMilarity (SSIM). Structure information is introduced into the despeckling met...
This paper proposes a new speckle reduction algorithm for Synthetic Aperture Radar (SAR) images. It is based on the Non Local (NL) means filter and improved by Structural SIMilarity (SSIM). Structure information is introduced into the despeckling met...
2012, 34(4): 956-962.
doi: 10.3724/SP.J.1146.2011.00699
Abstract:
To cope with the disadvantage that many receiving channels will be needed in traditional Long Baseline Interferometer (LBI) localization system, a novel emitter localization method using ambiguous phase difference measurements by a rotating LBI is pr...
To cope with the disadvantage that many receiving channels will be needed in traditional Long Baseline Interferometer (LBI) localization system, a novel emitter localization method using ambiguous phase difference measurements by a rotating LBI is pr...
2012, 34(4): 963-968.
doi: 10.3724/SP.J.1146.2011.0050
Abstract:
Based on analyzing the geometric model of SAR deception-jamming, a real-time deception-jamming algorithm for large scene is proposed. For real-time jamming, a large scene is divided into several sub-blocks and modulated separately. An analysis of jam...
Based on analyzing the geometric model of SAR deception-jamming, a real-time deception-jamming algorithm for large scene is proposed. For real-time jamming, a large scene is divided into several sub-blocks and modulated separately. An analysis of jam...
2012, 34(4): 969-975.
doi: 10.3724/SP.J.1146.2011.00698
Abstract:
Traditional Physical Optics (PO) is able to efficiently deal with 3D electromagnetic problem involving structures with electrically large dimension in the open space, usually obtaining calculation results with good precision. However, traditional PO ...
Traditional Physical Optics (PO) is able to efficiently deal with 3D electromagnetic problem involving structures with electrically large dimension in the open space, usually obtaining calculation results with good precision. However, traditional PO ...
2012, 34(4): 976-980.
doi: 10.3724/SP.J.1146.2011.00990
Abstract:
To reduce the noise figure in the tradition low noise amplifier, extend the bandwidth and achieve more precise step accuracy, a RF programmable amplifier with low noise single-ended differential circuit is proposed. The single-ended differential circ...
To reduce the noise figure in the tradition low noise amplifier, extend the bandwidth and achieve more precise step accuracy, a RF programmable amplifier with low noise single-ended differential circuit is proposed. The single-ended differential circ...
2012, 34(4): 986-991.
doi: 10.3724/SP.J.1146.2011.00915
Abstract:
Based on the property of the disjointed cubes that the logic operators OR and EXOR can replace each other, an algorithm of two level Mixed-Polarity Reed-Muller (MPRM) optimization is proposed. In the algorithm, by searching and decomposing the majori...
Based on the property of the disjointed cubes that the logic operators OR and EXOR can replace each other, an algorithm of two level Mixed-Polarity Reed-Muller (MPRM) optimization is proposed. In the algorithm, by searching and decomposing the majori...
2012, 34(4): 992-996.
doi: 10.3724/SP.J.1146.2011.00993
Abstract:
This paper presents a hierarchical cost aggregation-based fast stereo image matching method based on Webers law and guided filtering. Weber local descriptors for each color channel are firstly extracted from stereo pairs, and raw matching costs betwe...
This paper presents a hierarchical cost aggregation-based fast stereo image matching method based on Webers law and guided filtering. Weber local descriptors for each color channel are firstly extracted from stereo pairs, and raw matching costs betwe...
2012, 34(4): 997-1001.
doi: 10.3724/SP.J.1146.2011.00885
Abstract:
According to the problem of two-dimension (2-D) Direction Of Arrival (DOA) estimation accuracy low for wideband Linear Frequency Modulation (LFM) signals, a method of 2-D DOA estimation based on Radon-Wigner Transform (RWT) is proposed. In this metho...
According to the problem of two-dimension (2-D) Direction Of Arrival (DOA) estimation accuracy low for wideband Linear Frequency Modulation (LFM) signals, a method of 2-D DOA estimation based on Radon-Wigner Transform (RWT) is proposed. In this metho...
2012, 34(4): 1002-1006.
doi: 10.3724/SP.J.1146.2011.00957
Abstract:
This paper presents a new low power small area wide-band Voltage Controlled Oscillator (VCO) for Global Navigation Satellite System (GNSS) receiver. The VCO is separated in two discrete working regions from the characteristic of all-band GNSS signals...
This paper presents a new low power small area wide-band Voltage Controlled Oscillator (VCO) for Global Navigation Satellite System (GNSS) receiver. The VCO is separated in two discrete working regions from the characteristic of all-band GNSS signals...
2012, 34(4): 1007-1011.
doi: 10.3724/SP.J.1146.2011.00899
Abstract:
The mode switching is investigated for MIMO systems with considering four practical factors including channel estimation error, packet loss probability constraint, Automatic Repeat reQuest (ARQ) technique, discrete transmission rate and practical cod...
The mode switching is investigated for MIMO systems with considering four practical factors including channel estimation error, packet loss probability constraint, Automatic Repeat reQuest (ARQ) technique, discrete transmission rate and practical cod...
2012, 34(4): 1012-1016.
doi: 10.3724/SP.J.1146.2011.00884
Abstract:
A multi-threshold pipeline based on parallel completion is proposed to improve the throughput of asynchronous NULL Convention Logic (NCL) pipeline. With the special semi-static NCL threshold gates to be realized asynchronous combinational logic, data...
A multi-threshold pipeline based on parallel completion is proposed to improve the throughput of asynchronous NULL Convention Logic (NCL) pipeline. With the special semi-static NCL threshold gates to be realized asynchronous combinational logic, data...
2012, 34(4): 917-922.
doi: 10.3724/SP.J.1146.2011.00860
Abstract:
In order to improve the phase noise reduction effect and to avoid filtering useful phase jumps, this paper first investigates mode filtering algorithm and proposes a modified mode estimator based on shortest sub-interval seeking for interferometric p...
In order to improve the phase noise reduction effect and to avoid filtering useful phase jumps, this paper first investigates mode filtering algorithm and proposes a modified mode estimator based on shortest sub-interval seeking for interferometric p...
2012, 34(4): 981-985.
doi: 10.3724/SP.J.1146.2011.00382
Abstract:
Efficiency and linearity are two key features and design difficulties of Power Amplifier (PA). In this paper, a 2.5-2.6 GHz highly efficient GaN inverse class-F PA is designed. The input and output harmonic matching networks are designed through anal...
Efficiency and linearity are two key features and design difficulties of Power Amplifier (PA). In this paper, a 2.5-2.6 GHz highly efficient GaN inverse class-F PA is designed. The input and output harmonic matching networks are designed through anal...
