Email alert
2011 Vol. 33, No. 3
Display Method:
2011, 33(3): 509-514.
doi: 10.3724/SP.J.1146.2010.00465
Abstract:
Cognitive Radio Networks (CRNs) improve Secondary Users (SUs) transmission performance through cooperative transmission between SUs without interfering the regular transmissions of the Primary Users (PU). In this paper, a new cooperative transmission...
Cognitive Radio Networks (CRNs) improve Secondary Users (SUs) transmission performance through cooperative transmission between SUs without interfering the regular transmissions of the Primary Users (PU). In this paper, a new cooperative transmission...
2011, 33(3): 515-520.
doi: 10.3724/SP.J.1146.2010.00658
Abstract:
Focusing on the V-BLAST OFDM system with distributed transmit antennas in multipath fading channel, a novel signal transmission method utilizing spatial power spreading is proposed. The method takes advantage of the delays among distributed antennas ...
Focusing on the V-BLAST OFDM system with distributed transmit antennas in multipath fading channel, a novel signal transmission method utilizing spatial power spreading is proposed. The method takes advantage of the delays among distributed antennas ...
2011, 33(3): 521-526.
doi: 10.3724/SP.J.1146.2010.00479
Abstract:
For a cognitive radio communication system coexisting with radar to access the radar spectrum opportunistically, an efficient Cooperative Sensing Algorithm (CSA) for swept radar pulse train is proposed. There is a central processing node which cooper...
For a cognitive radio communication system coexisting with radar to access the radar spectrum opportunistically, an efficient Cooperative Sensing Algorithm (CSA) for swept radar pulse train is proposed. There is a central processing node which cooper...
2011, 33(3): 527-532.
doi: 10.3724/SP.J.1146.2010.00659
Abstract:
As the protection distance is limited, ultra-wideband signals may still interfere another communication system even with the satisfaction of the power spectral density limit. This paper derives the common expressions of bit error rate of another comm...
As the protection distance is limited, ultra-wideband signals may still interfere another communication system even with the satisfaction of the power spectral density limit. This paper derives the common expressions of bit error rate of another comm...
2011, 33(3): 533-536.
doi: 10.3724/SP.J.1146.2010.00671
Abstract:
A new technique of joint estimation of Carrier Frequency Offsets (CFOs) is proposed based on maximum-likelihood estimation using two distributed receive antennas helping for each other for flat-fading Rayleigh channels. By utilizing the prior informa...
A new technique of joint estimation of Carrier Frequency Offsets (CFOs) is proposed based on maximum-likelihood estimation using two distributed receive antennas helping for each other for flat-fading Rayleigh channels. By utilizing the prior informa...
2011, 33(3): 537-542.
doi: 10.3724/SP.J.1146.2010.00670
Abstract:
A sorting approach for Scalable Video Coding (SVC) streaming is proposed for video transmission. By the accurate states selection and the effective approximate distortion calculation of the fully scalable video streaming, the proposed approach can pr...
A sorting approach for Scalable Video Coding (SVC) streaming is proposed for video transmission. By the accurate states selection and the effective approximate distortion calculation of the fully scalable video streaming, the proposed approach can pr...
2011, 33(3): 543-548.
doi: 10.3724/SP.J.1146.2010.00455
Abstract:
To reduce the distortion in the video coding, the two-step method for distortion compensation in video coding is proposed. Firstly, the DC offset of the reconstructed picture is compensated. Then, the adaptive compensation filter is designed for proc...
To reduce the distortion in the video coding, the two-step method for distortion compensation in video coding is proposed. Firstly, the DC offset of the reconstructed picture is compensated. Then, the adaptive compensation filter is designed for proc...
2011, 33(3): 549-554.
doi: 10.3724/SP.J.1146.2009.01615
Abstract:
A new method of construction of shift sequences is presented by setting different parameters to shift sequences. With these shift sequences, a class of sequence sets is got with flexible zero or low correlation zone whose set sizes can reach or appro...
A new method of construction of shift sequences is presented by setting different parameters to shift sequences. With these shift sequences, a class of sequence sets is got with flexible zero or low correlation zone whose set sizes can reach or appro...
2011, 33(3): 555-562.
doi: 10.3724/SP.J.1146.2010.00409
Abstract:
From the view of differentiated service and load balancing, this paper proposes and implements a load balancing cluster architecture supported differentiated service. By system identification and resource optimal control, the front-end dispatcher can...
From the view of differentiated service and load balancing, this paper proposes and implements a load balancing cluster architecture supported differentiated service. By system identification and resource optimal control, the front-end dispatcher can...
2011, 33(3): 563-568.
doi: 10.3724/SP.J.1146.2010.00560
Abstract:
The communication between nodes is designed to meet the low consumption of resources, large carrier frequency offset, low-cost physical layer requirements because nodes are generally subject to resource, cost and power consumption constraints in wire...
The communication between nodes is designed to meet the low consumption of resources, large carrier frequency offset, low-cost physical layer requirements because nodes are generally subject to resource, cost and power consumption constraints in wire...
2011, 33(3): 569-574.
doi: 10.3724/SP.J.1146.2010.00529
Abstract:
The possibility of occurring exception is relatively small in most applications of wireless sensor networks. So data obtained in sequent moment by the same node have time correlation, and data obtained in the same time by adjacent nodes have space co...
The possibility of occurring exception is relatively small in most applications of wireless sensor networks. So data obtained in sequent moment by the same node have time correlation, and data obtained in the same time by adjacent nodes have space co...
2011, 33(3): 575-579.
doi: 10.3724/SP.J.1146.2010.00410
Abstract:
The characteristic of loose connectivity of Delay Tolerant Network (DTN) is a huge challenge for data delivery. All of the routing methods do not thoroughly use the status of the peer, so SARM (Situation-Aware Routing Method) is proposed. SARM estima...
The characteristic of loose connectivity of Delay Tolerant Network (DTN) is a huge challenge for data delivery. All of the routing methods do not thoroughly use the status of the peer, so SARM (Situation-Aware Routing Method) is proposed. SARM estima...
2011, 33(3): 580-586.
doi: 10.3724/SP.J.1146.2010.00533
Abstract:
Petri nets is a modeling and analyzing mathematical tool based on graphic, which can be used efficiently in describing the asynchronous and concurrent behaviors of system. However, existing advance Petri nets are incapable of modeling and analyzing e...
Petri nets is a modeling and analyzing mathematical tool based on graphic, which can be used efficiently in describing the asynchronous and concurrent behaviors of system. However, existing advance Petri nets are incapable of modeling and analyzing e...
2011, 33(3): 587-591.
doi: 10.3724/SP.J.1146.2010.00622
Abstract:
Group Authenticated Key Exchange (GAKE) protocols allow two or more parties to generate a common group session key in public channel. Considering users different computing power, a new GAKE protocol is proposed for imbalanced wireless network and its...
Group Authenticated Key Exchange (GAKE) protocols allow two or more parties to generate a common group session key in public channel. Considering users different computing power, a new GAKE protocol is proposed for imbalanced wireless network and its...
2011, 33(3): 592-596.
doi: 10.3724/SP.J.1146.2010.00427
Abstract:
This paper presents a novel double-layered embedding steganographic algorithm based on steganographic codes, wet paper codes and graphic matching theory, which can achieve high embedding efficiency and preserve the first-order histogram of the cover ...
This paper presents a novel double-layered embedding steganographic algorithm based on steganographic codes, wet paper codes and graphic matching theory, which can achieve high embedding efficiency and preserve the first-order histogram of the cover ...
2011, 33(3): 597-603.
doi: 10.3724/SP.J.1146.2010.00943
Abstract:
Stereo vision system plays important role in three-dimensional information perception. Due to the high computational complexity, real-time processing of stereo vision needs to use dedicated hardware. However, performance requirements conflict with ha...
Stereo vision system plays important role in three-dimensional information perception. Due to the high computational complexity, real-time processing of stereo vision needs to use dedicated hardware. However, performance requirements conflict with ha...
2011, 33(3): 604-609.
doi: 10.3724/SP.J.1146.2010.00417
Abstract:
In order to improve the performance of sparse system identification, the l0 norm constraint LMS algorithm is studied and improved in this paper. Firstly, the convergence of the algorithm is accelerated by the introduction of a step size control metho...
In order to improve the performance of sparse system identification, the l0 norm constraint LMS algorithm is studied and improved in this paper. Firstly, the convergence of the algorithm is accelerated by the introduction of a step size control metho...
A GPU-based Parallel Implementation of Compressive Sampling Reconstruction for SAR Image Compression
2011, 33(3): 610-615.
doi: 10.3724/SP.J.1146.2010.00461
Abstract:
Compressive Sampling (CS) technique has been adopted to compress Synthetic Aperture Radar (SAR) images. However, due to the mass data of high resolution SAR images, the reconstruction of compressive sampling generates huge computational load, making ...
Compressive Sampling (CS) technique has been adopted to compress Synthetic Aperture Radar (SAR) images. However, due to the mass data of high resolution SAR images, the reconstruction of compressive sampling generates huge computational load, making ...
2011, 33(3): 616-621.
doi: 10.3724/SP.J.1146.2010.00625
Abstract:
A novel passive radar imaging method is presented using distributed apertures that relies on illuminators of opportunity. The measurement is modeled using the wave equation. A new passive measurement model is proposed that expresses the measurement a...
A novel passive radar imaging method is presented using distributed apertures that relies on illuminators of opportunity. The measurement is modeled using the wave equation. A new passive measurement model is proposed that expresses the measurement a...
2011, 33(3): 622-627.
doi: 10.3724/SP.J.1146.2010.00904
Abstract:
Due to the variational flight path during the diving maneuver, the range function of the point target for the missile-borne SAR becomes complicated. Thus, a new imaging method is proposed in this paper. Firstly, the target range function is expanded ...
Due to the variational flight path during the diving maneuver, the range function of the point target for the missile-borne SAR becomes complicated. Thus, a new imaging method is proposed in this paper. Firstly, the target range function is expanded ...
2011, 33(3): 628-633.
doi: 10.3724/SP.J.1146.2010.00575
Abstract:
An advanced algorithm is proposed to obtain forward-target image on a curve trajectory, which causes a serious range coupling. The algorithm decreases efficiently the coupling with Range Walk Correction (RCM) in time domain firstly. The 2-dimision fr...
An advanced algorithm is proposed to obtain forward-target image on a curve trajectory, which causes a serious range coupling. The algorithm decreases efficiently the coupling with Range Walk Correction (RCM) in time domain firstly. The 2-dimision fr...
2011, 33(3): 634-641.
doi: 10.3724/SP.J.1146.2010.00491
Abstract:
A novel forward-looking SAR three-dimension imaging method based on interferometric technology through different snapshots is proposed in this paper. Practical linear array antennas are laid to achieve high azimuth resolution in azimuth dimension and...
A novel forward-looking SAR three-dimension imaging method based on interferometric technology through different snapshots is proposed in this paper. Practical linear array antennas are laid to achieve high azimuth resolution in azimuth dimension and...
2011, 33(3): 642-645.
doi: 10.3724/SP.J.1146.2010.00733
Abstract:
For the problem of CFAR (Constant False Alarm Rate) detection in clutter, a new detector, i.e., the Blind-CFAR detector is proposed. The Blind-CFAR detector calculates its detection threshold through the PDF (Probability Density Function) estimation ...
For the problem of CFAR (Constant False Alarm Rate) detection in clutter, a new detector, i.e., the Blind-CFAR detector is proposed. The Blind-CFAR detector calculates its detection threshold through the PDF (Probability Density Function) estimation ...
2011, 33(3): 646-651.
doi: 10.3724/SP.J.1146.2010.00416
Abstract:
This paper focuses on the effect of arbitrary transmitted waveform on clutter characteristics for airborne MIMO radar. Transmit waveform synthesis model is established by the transformation for signal space and sensor space. The uniform model of spac...
This paper focuses on the effect of arbitrary transmitted waveform on clutter characteristics for airborne MIMO radar. Transmit waveform synthesis model is established by the transformation for signal space and sensor space. The uniform model of spac...
2011, 33(3): 652-658.
doi: 10.3724/SP.J.1146.2010.00446
Abstract:
In order to make use of a prior information about target motion state, this paper applies coupling of detection and tracking based on Bayesian theory to the process of relay of tracking, which can enhance the performance of target detection and track...
In order to make use of a prior information about target motion state, this paper applies coupling of detection and tracking based on Bayesian theory to the process of relay of tracking, which can enhance the performance of target detection and track...
2011, 33(3): 659-664.
doi: 10.3724/SP.J.1146.2010.00451
Abstract:
This paper proposes a multi-transmitter and multi-receiver SAR imaging algorithm based on Kalman filtering. In the algorithm, the application of multi-transmitter and multi-receiver offer more information about the scene and unambiguous wide swath is...
This paper proposes a multi-transmitter and multi-receiver SAR imaging algorithm based on Kalman filtering. In the algorithm, the application of multi-transmitter and multi-receiver offer more information about the scene and unambiguous wide swath is...
2011, 33(3): 665-671.
doi: 10.3724/SP.J.1146.2010.00525
Abstract:
In through-the-wall SAR imaging, the quality and reliability of the image are governed by the knowledge of wall parameters. Estimation error in wall parameters smears the image, and also causes targets to be imaged away from their true positions. In ...
In through-the-wall SAR imaging, the quality and reliability of the image are governed by the knowledge of wall parameters. Estimation error in wall parameters smears the image, and also causes targets to be imaged away from their true positions. In ...
2011, 33(3): 672-676.
doi: 10.3724/SP.J.1146.2010.00518
Abstract:
Recent theory of Compressed Sensing (CS) suggests that exact recovery of an unknown sparse signal can be achieved from few measurements with overwhelming probability. In this paper, CS technology is combined with random noise radar and the concept of...
Recent theory of Compressed Sensing (CS) suggests that exact recovery of an unknown sparse signal can be achieved from few measurements with overwhelming probability. In this paper, CS technology is combined with random noise radar and the concept of...
2011, 33(3): 677-683.
doi: 10.3724/SP.J.1146.2010.00532
Abstract:
Orthogonal Frequency-Division Multiplexing (OFDM) phase-coded radar has many prominent properties. However, there are some technical challenges on engineering realization, one of which is that instantaneous bandwidth is equal to the total bandwidth a...
Orthogonal Frequency-Division Multiplexing (OFDM) phase-coded radar has many prominent properties. However, there are some technical challenges on engineering realization, one of which is that instantaneous bandwidth is equal to the total bandwidth a...
2011, 33(3): 684-689.
doi: 10.3724/SP.J.1146.2010.00498
Abstract:
This paper presents two efficient algorithms for small squint and large squint mode Synthetic Aperture Radar (SAR) raw data simulation. One is based on SCaled Fourier Transform (SCFT) and the other is based on time-domain integration along range dime...
This paper presents two efficient algorithms for small squint and large squint mode Synthetic Aperture Radar (SAR) raw data simulation. One is based on SCaled Fourier Transform (SCFT) and the other is based on time-domain integration along range dime...
2011, 33(3): 690-695.
doi: 10.3724/SP.J.1146.2010.00555
Abstract:
In this paper, a SAR raw signal simulation algorithm is presented in a mixed time-frequency domain. By space-variant system transfer function along range, spectrum of raw signal is calculated precisely in range time domain. Then the complexity and ph...
In this paper, a SAR raw signal simulation algorithm is presented in a mixed time-frequency domain. By space-variant system transfer function along range, spectrum of raw signal is calculated precisely in range time domain. Then the complexity and ph...
2011, 33(3): 696-700.
doi: 10.3724/SP.J.1146.2010.00576
Abstract:
Adaptive detection for distributed target and multiple point targets in non-homogeneous environments is studied in this paper, where it is assumed that the covariance matrix of the secondary data follows inverse Wishart distribution conditioned on th...
Adaptive detection for distributed target and multiple point targets in non-homogeneous environments is studied in this paper, where it is assumed that the covariance matrix of the secondary data follows inverse Wishart distribution conditioned on th...
2011, 33(3): 701-705.
doi: 10.3724/SP.J.1146.2010.00643
Abstract:
On the basis of the impulse Ultra Wide Band (UWB) sequential signal module and the Maximum Likelihood (ML) rule, the generalized Cramer-Rao Lower Bound (CRLB) for UWB vital signal parameter estimation is analyzed with the Fisher Information Matrix (F...
On the basis of the impulse Ultra Wide Band (UWB) sequential signal module and the Maximum Likelihood (ML) rule, the generalized Cramer-Rao Lower Bound (CRLB) for UWB vital signal parameter estimation is analyzed with the Fisher Information Matrix (F...
2011, 33(3): 706-710.
doi: 10.3724/SP.J.1146.2010.00666
Abstract:
In this paper, an improved beam optimization algorithm for spaceborne SAR applications is presented to reduce the number of optimizing variables and the calculation time, compared with the traditional algorithm. This algorithm improves on the traditi...
In this paper, an improved beam optimization algorithm for spaceborne SAR applications is presented to reduce the number of optimizing variables and the calculation time, compared with the traditional algorithm. This algorithm improves on the traditi...
2011, 33(3): 711-716.
doi: 10.3724/SP.J.1146.2010.00493
Abstract:
In this paper, an evaluation method based on modified structure similarity of jamming effects on synthetic aperture radar is proposed. This method can not only make good use of structure similarity as juncture between the subjective and the objective...
In this paper, an evaluation method based on modified structure similarity of jamming effects on synthetic aperture radar is proposed. This method can not only make good use of structure similarity as juncture between the subjective and the objective...
2011, 33(3): 717-722.
doi: 10.3724/SP.J.1146.2010.00636
Abstract:
In order to meet the processing requirements of portable real-time full HD video compression, this paper proposes a novel macroblock-level parallel architecture based on 1-D source pixels based linear array, which overcomes the problem of massive amo...
In order to meet the processing requirements of portable real-time full HD video compression, this paper proposes a novel macroblock-level parallel architecture based on 1-D source pixels based linear array, which overcomes the problem of massive amo...
2011, 33(3): 723-728.
doi: 10.3724/SP.J.1146.2010.00463
Abstract:
This paper analyzes emphatically the read-write conflict mechanism of reconfigurable memory, and reveals the relations of address conflict, readout mapping and routing of memory under reconfigurable condition. Besides, the paper presents a bit identi...
This paper analyzes emphatically the read-write conflict mechanism of reconfigurable memory, and reveals the relations of address conflict, readout mapping and routing of memory under reconfigurable condition. Besides, the paper presents a bit identi...
2011, 33(3): 729-733.
doi: 10.3724/SP.J.1146.2010.00629
Abstract:
While current researches on terminal information model could not provide enough support for Ubiquitous Terminal Service (UTS) in respect of information, requirements and modeling method for management information in UTS are studied. According to the ...
While current researches on terminal information model could not provide enough support for Ubiquitous Terminal Service (UTS) in respect of information, requirements and modeling method for management information in UTS are studied. According to the ...
2011, 33(3): 734-738.
doi: 10.3724/SP.J.1146.2010.00675
Abstract:
A concurrent transmission scheme is proposed in this paper based on nodal SINR (Signal to Interference plus Noise Ratio) under fast and slow fading coexistence channel in Ad hoc networks. Based on the distribution of channel quality, a concurrent tra...
A concurrent transmission scheme is proposed in this paper based on nodal SINR (Signal to Interference plus Noise Ratio) under fast and slow fading coexistence channel in Ad hoc networks. Based on the distribution of channel quality, a concurrent tra...
2011, 33(3): 739-743.
doi: 10.3724/SP.J.1146.2010.00487
Abstract:
Non-Data-Aided (NDA) symbol synchronization for Orthogonal Frequency Division Multiplexing (OFDM) systems is studied in this paper. Firstly, a cost function, which is based on the power difference between adjacent subcarriers of OFDM system with cons...
Non-Data-Aided (NDA) symbol synchronization for Orthogonal Frequency Division Multiplexing (OFDM) systems is studied in this paper. Firstly, a cost function, which is based on the power difference between adjacent subcarriers of OFDM system with cons...
2011, 33(3): 744-748.
doi: 10.3724/SP.J.1146.2010.00399
Abstract:
A novel space mapping algorithm with high convergence is presented that improves the parameters mapping from surrogate model to fine model. By adding the process of coarse model parameter selection, it avoids false convergence in the optimization of ...
A novel space mapping algorithm with high convergence is presented that improves the parameters mapping from surrogate model to fine model. By adding the process of coarse model parameter selection, it avoids false convergence in the optimization of ...
2011, 33(3): 749-753.
doi: 10.3724/SP.J.1146.2010.00587
Abstract:
A novel design method for hardware-efficient digital interpolation filter applied to stereo audio Sigma- Delta Digital-to-Analog Converter (- DAC) is proposed in this paper. The method proclaims a new structure of multiplexing the interpolation filte...
A novel design method for hardware-efficient digital interpolation filter applied to stereo audio Sigma- Delta Digital-to-Analog Converter (- DAC) is proposed in this paper. The method proclaims a new structure of multiplexing the interpolation filte...
2011, 33(3): 754-757.
doi: 10.3724/SP.J.1146.2010.00661
Abstract:
In this paper, the Asymptotic Waveform Evaluation (AWE) technique is applied to study electromagnetic scattering analysis of Double-NeGative (DNG) medium. The PMCHWT equation of the DNG is deduced based on its constitutive relationship. And the surfa...
In this paper, the Asymptotic Waveform Evaluation (AWE) technique is applied to study electromagnetic scattering analysis of Double-NeGative (DNG) medium. The PMCHWT equation of the DNG is deduced based on its constitutive relationship. And the surfa...
2011, 33(3): 758-762.
doi: 10.3724/SP.J.1146.2010.00519
Abstract:
The problems, which can not be calculated due to the insufficient of memory, can be solved with out-of- core solving method, but it takes too longer time because the speed limit of the data reading/writing on the disk. To solve the above problem, par...
The problems, which can not be calculated due to the insufficient of memory, can be solved with out-of- core solving method, but it takes too longer time because the speed limit of the data reading/writing on the disk. To solve the above problem, par...
