Email alert
2010 Vol. 32, No. 11
Display Method:
2010, 32(11): 2541-2546.
doi: 10.3724/SP.J.1146.2009.01468
Abstract:
The current video coding standards have higher coding efficiency, but also increase the coding complexity. Thus improving the encoding speed is very important. According to the distribution of the residual coefficients, a fast encoding algorithm is p...
The current video coding standards have higher coding efficiency, but also increase the coding complexity. Thus improving the encoding speed is very important. According to the distribution of the residual coefficients, a fast encoding algorithm is p...
2010, 32(11): 2547-2553.
doi: 10.3724/SP.J.1146.2009.01431
Abstract:
To address the bad effect of intra-coding Rate Control (RC) of H.264, a novel image complexity adaptive I-frame RC algorithm is proposed. First, the gradient of luma pixel is detected in I-frame with Sobel operator and the edge direction histogram is...
To address the bad effect of intra-coding Rate Control (RC) of H.264, a novel image complexity adaptive I-frame RC algorithm is proposed. First, the gradient of luma pixel is detected in I-frame with Sobel operator and the edge direction histogram is...
2010, 32(11): 2554-2559.
doi: 10.3724/SP.J.1146.2009.01427
Abstract:
The channelization technique is a key element of onboard switching in the next generation broadband satellite communication systems. With this technique, the independent communication signals can be extracted from the wideband uplink signal. And havi...
The channelization technique is a key element of onboard switching in the next generation broadband satellite communication systems. With this technique, the independent communication signals can be extracted from the wideband uplink signal. And havi...
2010, 32(11): 2560-2564.
doi: 10.3724/SP.J.1146.2009.01632
Abstract:
A distributed power control algorithm in hybrid cellular and Peer-to-Peer (P2P) network is proposed. In the objective of overall system spectrum efficiency maximization, a distributed power control scheme of P2P transmission in the hybrid system mode...
A distributed power control algorithm in hybrid cellular and Peer-to-Peer (P2P) network is proposed. In the objective of overall system spectrum efficiency maximization, a distributed power control scheme of P2P transmission in the hybrid system mode...
2010, 32(11): 2565-2570.
doi: 10.3724/SP.J.1146.2009.01532
Abstract:
In this paper, the issue of channel estimation is investigated for distributed space-frequency coding system in cooperative communications. To make the channel being identifiable, Cyclic Convolution Filters (CCF) are utilized at the relay nodes. In t...
In this paper, the issue of channel estimation is investigated for distributed space-frequency coding system in cooperative communications. To make the channel being identifiable, Cyclic Convolution Filters (CCF) are utilized at the relay nodes. In t...
2010, 32(11): 2571-2575.
doi: 10.3724/SP.J.1146.2009.01434
Abstract:
Spectrum sensing is one of the key technologies for cognitive radio systems. After analyzing the correlation matrix of the received signals, the Difference between the Maximum eigenvalue and the Minimum eigenvalue (DMM) is employed as the test statis...
Spectrum sensing is one of the key technologies for cognitive radio systems. After analyzing the correlation matrix of the received signals, the Difference between the Maximum eigenvalue and the Minimum eigenvalue (DMM) is employed as the test statis...
2010, 32(11): 2576-2581.
doi: 10.3724/SP.J.1146.2009.01429
Abstract:
To improve the resource utilization of traditional two-way wireless relay system which employs Equal Power Allocation (EPA) between the source and relays, an Optimal Power Allocation (OPA) algorithm for a cooperative network coding scheme is proposed...
To improve the resource utilization of traditional two-way wireless relay system which employs Equal Power Allocation (EPA) between the source and relays, an Optimal Power Allocation (OPA) algorithm for a cooperative network coding scheme is proposed...
2010, 32(11): 2582-2587.
doi: 10.3724/SP.J.1146.2009.01581
Abstract:
The channels between the Base Station and the relays (BS-relay) and those between the relays and the MoBile stations (relay-MB) can be modeled as mixed fading channels in cellular communication relay, which means that the BS-relay channels are Rician...
The channels between the Base Station and the relays (BS-relay) and those between the relays and the MoBile stations (relay-MB) can be modeled as mixed fading channels in cellular communication relay, which means that the BS-relay channels are Rician...
2010, 32(11): 2588-2592.
doi: 10.3724/SP.J.1146.2009.01585
Abstract:
For the issue of the synchronization in nonsinusoidal orthogonal modulation signal in time domain based on Prolate Spheroidal Wave Functions (PSWF), a synchronization algorithm based on auxiliary sequence is proposed by analyzing the pulses sequence ...
For the issue of the synchronization in nonsinusoidal orthogonal modulation signal in time domain based on Prolate Spheroidal Wave Functions (PSWF), a synchronization algorithm based on auxiliary sequence is proposed by analyzing the pulses sequence ...
2010, 32(11): 2593-2598.
doi: 10.3724/SP.J.1146.2009.01513
Abstract:
A topology-transparent link activation Media Access Control (MAC) protocol is proposed for Ad hoc networks with Multiple Input Multiple Output (MIMO) links. The protocol allocates transmission slots for each link in the networks based on the theory o...
A topology-transparent link activation Media Access Control (MAC) protocol is proposed for Ad hoc networks with Multiple Input Multiple Output (MIMO) links. The protocol allocates transmission slots for each link in the networks based on the theory o...
2010, 32(11): 2599-2605.
doi: 10.3724/SP.J.1146.2009.01504
Abstract:
Strip-based wireless sensor network is a typical application of wireless sensor network (WSN). Existent the network lifetime model is primarily focused on specific distribution and working model, which can not be applied to the lifetime estimation in...
Strip-based wireless sensor network is a typical application of wireless sensor network (WSN). Existent the network lifetime model is primarily focused on specific distribution and working model, which can not be applied to the lifetime estimation in...
2010, 32(11): 2606-2611.
doi: 10.3724/SP.J.1146.2009.01595
Abstract:
An algorithm based on an improved particle swarm optimization algorithm is proposed for the task management in the applications to multihop clustered wireless sensor networks which require collaborative processing executed in parallel on sensor nodes...
An algorithm based on an improved particle swarm optimization algorithm is proposed for the task management in the applications to multihop clustered wireless sensor networks which require collaborative processing executed in parallel on sensor nodes...
2010, 32(11): 2612-2617.
doi: 10.3724/SP.J.1146.2009.01530
Abstract:
Vehicle positioning method is a hot research topic for many years. In this paper, an ITS (Intelligent Transportation System) based on RFID is proposed, including the structure and communication protocol. A novel vehicle positioning method, based on t...
Vehicle positioning method is a hot research topic for many years. In this paper, an ITS (Intelligent Transportation System) based on RFID is proposed, including the structure and communication protocol. A novel vehicle positioning method, based on t...
2010, 32(11): 2618-2623.
doi: 10.3724/SP.J.1146.2009.01622
Abstract:
A new and fast level set method for segmentation of high-resolution SAR images into statistical homogenous areas is proposed. This approach is based on the G0 statistical model which can describe high-resolution SAR images as well as low-resolution S...
A new and fast level set method for segmentation of high-resolution SAR images into statistical homogenous areas is proposed. This approach is based on the G0 statistical model which can describe high-resolution SAR images as well as low-resolution S...
2010, 32(11): 2624-2629.
doi: 10.3724/SP.J.1146.2009.01575
Abstract:
The Ultra WideBand Short-Pulse (UWB-SP) Radar used for detecting targets is a promising technique in counter-terrorism, calamity rescue scenarios, urban-warfare and other fields as its high range resolution, strong penetrating power and good resolvin...
The Ultra WideBand Short-Pulse (UWB-SP) Radar used for detecting targets is a promising technique in counter-terrorism, calamity rescue scenarios, urban-warfare and other fields as its high range resolution, strong penetrating power and good resolvin...
2010, 32(11): 2630-2635.
doi: 10.3724/SP.J.1146.2009.01348
Abstract:
Micro-motion offers a new method to resolute targets and recognition. In order to implement micro- motion targets resolution in a high noise environment, the paper proposes a novel method based on B-Distribution (BD) and Viterbi algorithm. In this pa...
Micro-motion offers a new method to resolute targets and recognition. In order to implement micro- motion targets resolution in a high noise environment, the paper proposes a novel method based on B-Distribution (BD) and Viterbi algorithm. In this pa...
2010, 32(11): 2636-2641.
doi: 10.3724/SP.J.1146.2009.01570
Abstract:
A novel approach to moving target detection is proposed for dual-channel SAR system. This approach is on the basis of eigen-decomposition of the sample covariance matrix and examines the statistic of the second eigenvalue and the Along-Track Interfer...
A novel approach to moving target detection is proposed for dual-channel SAR system. This approach is on the basis of eigen-decomposition of the sample covariance matrix and examines the statistic of the second eigenvalue and the Along-Track Interfer...
2010, 32(11): 2642-2647.
doi: 10.3724/SP.J.1146.2010.00345
Abstract:
This paper investigates practical processing approaches for interferogram generation based on coarse DEM (Digital Elevation Model). The key point of the proposed method is to make full use of available coarse DEM to complete the operations of SAR ima...
This paper investigates practical processing approaches for interferogram generation based on coarse DEM (Digital Elevation Model). The key point of the proposed method is to make full use of available coarse DEM to complete the operations of SAR ima...
2010, 32(11): 2648-2654.
doi: 10.3724/SP.J.1146.2009.01461
Abstract:
The asynchronous bistatic SAR imaging issue of variable velocity transceiver is studied in this paper. First of all, the geometric scene of the variable velocity transceiver model is constructed, and the approximation model of the echo of the bistati...
The asynchronous bistatic SAR imaging issue of variable velocity transceiver is studied in this paper. First of all, the geometric scene of the variable velocity transceiver model is constructed, and the approximation model of the echo of the bistati...
2010, 32(11): 2655-2660.
doi: 10.3724/SP.J.1146.2009.01473
Abstract:
Standard sliding spotlight imaging algorithms are inefficient due to the additional processing to overcome the azimuth spectra aliasing. In this paper, based on azimuth frequency de-ramping principle, a novel processing approach is proposed. Compared...
Standard sliding spotlight imaging algorithms are inefficient due to the additional processing to overcome the azimuth spectra aliasing. In this paper, based on azimuth frequency de-ramping principle, a novel processing approach is proposed. Compared...
2010, 32(11): 2661-2667.
doi: 10.3724/SP.J.1146.2009.01423
Abstract:
In this paper, the motion compensation of spotlight mode SAR data processing is studied with Polar Format Algorithm (PFA). A new approach for motion error estimation and compensation in azimuth wavenumber domain is proposed. The framework applies ran...
In this paper, the motion compensation of spotlight mode SAR data processing is studied with Polar Format Algorithm (PFA). A new approach for motion error estimation and compensation in azimuth wavenumber domain is proposed. The framework applies ran...
2010, 32(11): 2668-2673.
doi: 10.3724/SP.J.1146.2009.01527
Abstract:
A new ship wake CFAR detection algorithm is proposed in SAR images. The algorithm first detects all the ships and replaces the pixels gray value of the detected ship with the gray mean value; Then, with the ship barycenter as the center, a square ima...
A new ship wake CFAR detection algorithm is proposed in SAR images. The algorithm first detects all the ships and replaces the pixels gray value of the detected ship with the gray mean value; Then, with the ship barycenter as the center, a square ima...
2010, 32(11): 2674-2679.
doi: 10.3724/SP.J.1146.2009.01600
Abstract:
Motion blur due to camera shaking during exposure is one common phenomena of image degradation. Based on the variational Bayesian estimation theory and the statistical characteristic of the natural images gradient, a blind image deconvolution algorit...
Motion blur due to camera shaking during exposure is one common phenomena of image degradation. Based on the variational Bayesian estimation theory and the statistical characteristic of the natural images gradient, a blind image deconvolution algorit...
2010, 32(11): 2680-2685.
doi: 10.3724/SP.J.1146.2009.01543
Abstract:
An object tracking algorithm with global kernel density seeking is proposed to avoid local probability mode in mean shift tracking process. Firstly, a monotonically decreasing sequence of bandwidths is obtained according to the object scale. At the f...
An object tracking algorithm with global kernel density seeking is proposed to avoid local probability mode in mean shift tracking process. Firstly, a monotonically decreasing sequence of bandwidths is obtained according to the object scale. At the f...
2010, 32(11): 2686-2690.
doi: 10.3724/SP.J.1146.2009.01549
Abstract:
In multi-target tracking, aiming at the data association problem that arises due to indistinguishable measurements in the presence of clutter, and the curse of dimensionality that arises due to the increased size of the state-space associated with mu...
In multi-target tracking, aiming at the data association problem that arises due to indistinguishable measurements in the presence of clutter, and the curse of dimensionality that arises due to the increased size of the state-space associated with mu...
2010, 32(11): 2691-2694.
doi: 10.3724/SP.J.1146.2009.01580
Abstract:
Probability Hypothesis Density (PHD) filter has emerged as one of powerful tools for multi-target tracking. In the Sequential Monte Carlo (SMC) implementation of it, the filters output is particle approximation of PHD, so some special algorithm is ne...
Probability Hypothesis Density (PHD) filter has emerged as one of powerful tools for multi-target tracking. In the Sequential Monte Carlo (SMC) implementation of it, the filters output is particle approximation of PHD, so some special algorithm is ne...
2010, 32(11): 2695-2700.
doi: 10.3724/SP.J.1146.2009.01493
Abstract:
The lack of semantic information is a critical problem of context tree kernel in text representation. A context tree kernel method based on latent topics is proposed. First, words are mapped to latent topic space through Latent Dirichlet Allocation(L...
The lack of semantic information is a critical problem of context tree kernel in text representation. A context tree kernel method based on latent topics is proposed. First, words are mapped to latent topic space through Latent Dirichlet Allocation(L...
2010, 32(11): 2701-2706.
doi: 10.3724/SP.J.1146.2009.01489
Abstract:
Due to the bottleneck of the current representation of the state space and match rule in the negative selection algorithm, a negative selection algorithm based on the matrix representation is presented, which extends the state space from the vector t...
Due to the bottleneck of the current representation of the state space and match rule in the negative selection algorithm, a negative selection algorithm based on the matrix representation is presented, which extends the state space from the vector t...
2010, 32(11): 2707-2712.
doi: 10.3724/SP.J.1146.2009.01589
Abstract:
High dimensional clustering algorithm based on equal or random width density grid cannot guarantee high quality clustering results in complicated data sets. In this paper, a High dimensional Clustering algorithm based on Local Significant Unit (HC_LS...
High dimensional clustering algorithm based on equal or random width density grid cannot guarantee high quality clustering results in complicated data sets. In this paper, a High dimensional Clustering algorithm based on Local Significant Unit (HC_LS...
2010, 32(11): 2713-2717.
doi: 10.3724/SP.J.1146.2009.01623
Abstract:
Compressive sensing is a novel signal sampling theory under the condition that the signal is sparse or compressible. In this case, the small amount of signal values can be reconstructed accurately when the signal is sparse or compressible. In this pa...
Compressive sensing is a novel signal sampling theory under the condition that the signal is sparse or compressible. In this case, the small amount of signal values can be reconstructed accurately when the signal is sparse or compressible. In this pa...
2010, 32(11): 2718-2723.
doi: 10.3724/SP.J.1146.2009.01438
Abstract:
LFM signal is widely used in radar application. It is a key technology to obtain the high accuracy estimation of the Doppler frequency rate from the observed LFM signals. In this paper, a Fractional Fourier Transform (FrFT) based Doppler frequency ra...
LFM signal is widely used in radar application. It is a key technology to obtain the high accuracy estimation of the Doppler frequency rate from the observed LFM signals. In this paper, a Fractional Fourier Transform (FrFT) based Doppler frequency ra...
2010, 32(11): 2724-2729.
doi: 10.3724/SP.J.1146.2009.01430
Abstract:
To improve effectively the performance on speech emotion recognition, it is needed to perform nonlinear dimensionality reduction for speech feature data lying on a nonlinear manifold embedded in high-dimensional acoustic space. Supervised Locally Lin...
To improve effectively the performance on speech emotion recognition, it is needed to perform nonlinear dimensionality reduction for speech feature data lying on a nonlinear manifold embedded in high-dimensional acoustic space. Supervised Locally Lin...
2010, 32(11): 2730-2734.
doi: 10.3724/SP.J.1146.2009.01637
Abstract:
The Physical Optics (PO) algorithm is utilized to compute the transient scattering response and wideband Radar Cross Section (RCS) of electrically large targets modeled with NonUniform Rational B-Spline (NURBS) surfaces. The formula for the time-doma...
The Physical Optics (PO) algorithm is utilized to compute the transient scattering response and wideband Radar Cross Section (RCS) of electrically large targets modeled with NonUniform Rational B-Spline (NURBS) surfaces. The formula for the time-doma...
2010, 32(11): 2735-2739.
doi: 10.3724/SP.J.1146.2009.01611
Abstract:
An electrochemical bionic sensor for cholesterol detection is developed with molecular imprinting self-assembled film deposited on the screen printed gold electrode. The surface topography of planar bare gold electrode and thick film bare gold electr...
An electrochemical bionic sensor for cholesterol detection is developed with molecular imprinting self-assembled film deposited on the screen printed gold electrode. The surface topography of planar bare gold electrode and thick film bare gold electr...
2010, 32(11): 2740-2745.
doi: 10.3724/SP.J.1146.2009.01495
Abstract:
Complex filter is one of the major parts in low-if receiver to reject imagine signal. Considering the low-power requirement of IEEE802.15.4 standard, this paper presents a pseudo OTA with flexible configuration of common mode feedback block, which is...
Complex filter is one of the major parts in low-if receiver to reject imagine signal. Considering the low-power requirement of IEEE802.15.4 standard, this paper presents a pseudo OTA with flexible configuration of common mode feedback block, which is...
2010, 32(11): 2746-2750.
doi: 10.3724/SP.J.1146.2009.01512
Abstract:
Based on polarization differences between jamming signal and target echo, polarization filter can combat active suppression jamming effectively. However, traditional polarization radars consist of two transmitting channels and receiving channels, fac...
Based on polarization differences between jamming signal and target echo, polarization filter can combat active suppression jamming effectively. However, traditional polarization radars consist of two transmitting channels and receiving channels, fac...
2010, 32(11): 2751-2754.
doi: 10.3724/SP.J.1146.2009.01534
Abstract:
A new algorithm named Uncorrelated Discriminant Neighborhood Preserving Projections (UDNPP) is proposed based on manifold learning. And UDNPP algorithm includes the advantages of Linear Discriminant Analysis (LDA) and Neighborhood Preserving Projecti...
A new algorithm named Uncorrelated Discriminant Neighborhood Preserving Projections (UDNPP) is proposed based on manifold learning. And UDNPP algorithm includes the advantages of Linear Discriminant Analysis (LDA) and Neighborhood Preserving Projecti...
2010, 32(11): 2755-2759.
doi: 10.3724/SP.J.1146.2009.01439
Abstract:
A new detection scheme based on Hough transform for spatially distributed moving target which range walks and has strong range cells is proposed. The proposed scheme, Hough Detector (HD), consists of two steps. In the first step, a primary threshold ...
A new detection scheme based on Hough transform for spatially distributed moving target which range walks and has strong range cells is proposed. The proposed scheme, Hough Detector (HD), consists of two steps. In the first step, a primary threshold ...
2010, 32(11): 2760-2763.
doi: 10.3724/SP.J.1146.2009.01511
Abstract:
Two parameters are normally employed to evaluate recognition ability of the Ground Penetrating Radar (GPR) for the thin-layer: the least recognition thickness and the reflectance recognition precision. In this paper, the spectrum inversion method is ...
Two parameters are normally employed to evaluate recognition ability of the Ground Penetrating Radar (GPR) for the thin-layer: the least recognition thickness and the reflectance recognition precision. In this paper, the spectrum inversion method is ...
2010, 32(11): 2764-2767.
doi: 10.3724/SP.J.1146.2009.01183
Abstract:
Design of Electronic cabinet is constrained by structure intensity, ventilation and Shielding Effectiveness (SE). Practically, there are three fields affecting electronic equipment, electromagnetic, temperature, and elastic deformation fields which a...
Design of Electronic cabinet is constrained by structure intensity, ventilation and Shielding Effectiveness (SE). Practically, there are three fields affecting electronic equipment, electromagnetic, temperature, and elastic deformation fields which a...
2010, 32(11): 2768-2771.
doi: 10.3724/SP.J.1146.2010.00428
Abstract:
With the increasing of system frequency, the characteristics of microstrip substrates are non-ignorable factor for affecting the crosstalk between transmission lines. This paper analyzes the crosstalk between two parallel microstrip lines based on th...
With the increasing of system frequency, the characteristics of microstrip substrates are non-ignorable factor for affecting the crosstalk between transmission lines. This paper analyzes the crosstalk between two parallel microstrip lines based on th...
2010, 32(11): 2772-2775.
doi: 10.3724/SP.J.1146.2009.01418
Abstract:
Multi-standard convergence for high speed ultra-wideband wireless communication leads the evolution for future RF devices. In this paper a CMOS wideband low noise amplifier (LNA) with novel gain control method is presented. In the first stage shunt-r...
Multi-standard convergence for high speed ultra-wideband wireless communication leads the evolution for future RF devices. In this paper a CMOS wideband low noise amplifier (LNA) with novel gain control method is presented. In the first stage shunt-r...
2010, 32(11): 2776-2780.
doi: 10.3724/SP.J.1146.2009.01542
Abstract:
This paper proposes a hybrid spectrum sharing model which combines Overlay with Underlay. Based on the proposed model, considering of perfect and imperfect spectrum sensing, it models the channel activity with discrete-state Markov process. Furthermo...
This paper proposes a hybrid spectrum sharing model which combines Overlay with Underlay. Based on the proposed model, considering of perfect and imperfect spectrum sensing, it models the channel activity with discrete-state Markov process. Furthermo...
2010, 32(11): 2781-2784.
doi: 10.3724/SP.J.1146.2009.01652
Abstract:
The Normalized Min-Sum (NMS) algorithm can be implemented with low complexity and is widely used in the LDPC decoders, but there is a significant performance gap between the Belief Propagation (BP) algorithm and NMS algorithm for low-rate LDPC codes ...
The Normalized Min-Sum (NMS) algorithm can be implemented with low complexity and is widely used in the LDPC decoders, but there is a significant performance gap between the Belief Propagation (BP) algorithm and NMS algorithm for low-rate LDPC codes ...
2010, 32(11): 2785-2789.
doi: 10.3724/SP.J.1146.2009.01519
Abstract:
In the research on multi-user selection of Multiple Input Multiple Output (MIMO) broadcast system with limited feedback errors in users SINR estimation in existing methods are big, which constrains the system capacity. In this paper by combining the ...
In the research on multi-user selection of Multiple Input Multiple Output (MIMO) broadcast system with limited feedback errors in users SINR estimation in existing methods are big, which constrains the system capacity. In this paper by combining the ...
2010, 32(11): 2790-2794.
doi: 10.3724/SP.J.1146.2010.00388
Abstract:
This paper re-evaluates the security of Zodiac against Square attacks. There are 8-round Square distinguishers of Zodiac. In this paper, four equivalent structures of Zodiac are given, based on which two new 9-round distinguishers are proposed. Then ...
This paper re-evaluates the security of Zodiac against Square attacks. There are 8-round Square distinguishers of Zodiac. In this paper, four equivalent structures of Zodiac are given, based on which two new 9-round distinguishers are proposed. Then ...
