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2010 Vol. 32, No. 1
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2010, 32(1): 1-6.
doi: 10.3724/SP.J.1146.2008.01821
Abstract:
This paper focuses on the channel calibration for multi-channel Synthetic Aperture Radar (SAR) imagery. Incorporated with DBF processing, multi-channel SAR is promising in High-Resolution and Wide-Swath (HRWS) imaging. It coherently combines recorded...
This paper focuses on the channel calibration for multi-channel Synthetic Aperture Radar (SAR) imagery. Incorporated with DBF processing, multi-channel SAR is promising in High-Resolution and Wide-Swath (HRWS) imaging. It coherently combines recorded...
2010, 32(1): 7-11.
doi: 10.3724/SP.J.1146.2008.01809
Abstract:
MIMO radar with transmit diversity has the potential of high-resolution imaging, but the imaging results suffer from huge sidelobes. In order to analyze the imaging performance of MIMO radar, this paper establishes an imaging model firstly. The high-...
MIMO radar with transmit diversity has the potential of high-resolution imaging, but the imaging results suffer from huge sidelobes. In order to analyze the imaging performance of MIMO radar, this paper establishes an imaging model firstly. The high-...
2010, 32(1): 12-16.
doi: DOI: 10.3724/SP.J.1146.2009.00040
Abstract:
Considering the sparse structure of actual target space in GPR application, a novel 3D imaging method based on random aperture compressive sensing is proposed in this paper, which capable of reconstructing the target space from a few compressive sens...
Considering the sparse structure of actual target space in GPR application, a novel 3D imaging method based on random aperture compressive sensing is proposed in this paper, which capable of reconstructing the target space from a few compressive sens...
2010, 32(1): 17-21.
doi: 10.3724/SP.J.1146.2008.01509
Abstract:
Extraction of transmitted waveforms is an important step for MIMO radar. Based on Minimum Mean Square Error (MMSE) formulation, this paper presents a efficient approach for adaptive pulse compression filter of MIMO radar, in which weight coefficients...
Extraction of transmitted waveforms is an important step for MIMO radar. Based on Minimum Mean Square Error (MMSE) formulation, this paper presents a efficient approach for adaptive pulse compression filter of MIMO radar, in which weight coefficients...
2010, 32(1): 22-27.
doi: DOI: 10.3724/SP.J.1146.2008.01780
Abstract:
for the problem of electromechanical in the optimization design of reflector antennas with truss support structures, microscopic distortion of reflector surface is introduced in the formula of antennas far field patterns by phase difference, and the ...
for the problem of electromechanical in the optimization design of reflector antennas with truss support structures, microscopic distortion of reflector surface is introduced in the formula of antennas far field patterns by phase difference, and the ...
2010, 32(1): 28-31.
doi: 10.3724/SP.J.1146.2009.00500
Abstract:
This paper describes an airship borne SAR developed at the Institute of Electronics, Chinese Academy of Sciences. The airship borne SAR system features high resolution imaging capability of ground targets in the limited area. The function and archite...
This paper describes an airship borne SAR developed at the Institute of Electronics, Chinese Academy of Sciences. The airship borne SAR system features high resolution imaging capability of ground targets in the limited area. The function and archite...
2010, 32(1): 32-27.
doi: 10.3724/SP.J.1146.2008.01594
Abstract:
In this paper, based on the Dechirping technique, a new method of measuring relative delays among digital T/R modules for the wideband digital array utilizing wideband LFM pulses is proposed. To enhance radar systems flexibility and extensibility and...
In this paper, based on the Dechirping technique, a new method of measuring relative delays among digital T/R modules for the wideband digital array utilizing wideband LFM pulses is proposed. To enhance radar systems flexibility and extensibility and...
2010, 32(1): 38-42.
doi: 10.3724/SP.J.1146.2008.01536
Abstract:
Statistical properties of radar target echoes is researched on narrowband frequency diversity and spatial diversity MIMO radar, with a two-dimensional round shaped scatters model. The results show that target echo in any receiving channel follows a G...
Statistical properties of radar target echoes is researched on narrowband frequency diversity and spatial diversity MIMO radar, with a two-dimensional round shaped scatters model. The results show that target echo in any receiving channel follows a G...
2010, 32(1): 43-47.
doi: 10.3724/SP.J.1146.2009.00011
Abstract:
Based on the research of a differential filtering method retrieving composite shear from Doppler radar velocity data, considering the problems of this method, such as the number of edge detection points is too small, combined with the least squares a...
Based on the research of a differential filtering method retrieving composite shear from Doppler radar velocity data, considering the problems of this method, such as the number of edge detection points is too small, combined with the least squares a...
2010, 32(1): 48-53.
doi: 10.3724/SP.J.1146.2008.01470
Abstract:
The height measurement models considering earth curvature of INSAR mainly consist of two kinds- spaceborne interferometric SAR height measurement model and direct geocoding model. Spaceborne interferometric SAR height measurement model gets unambiguo...
The height measurement models considering earth curvature of INSAR mainly consist of two kinds- spaceborne interferometric SAR height measurement model and direct geocoding model. Spaceborne interferometric SAR height measurement model gets unambiguo...
2010, 32(1): 54-61.
doi: 10.3724/SP.J.1146.2008.00980
Abstract:
This paper studies the multifractal correlation characteristic of sea clutter and its application to the low-observable target detection within sea clutter. Multifractal correlation, which studies the spatial correlation of two points with different ...
This paper studies the multifractal correlation characteristic of sea clutter and its application to the low-observable target detection within sea clutter. Multifractal correlation, which studies the spatial correlation of two points with different ...
2010, 32(1): 62-68.
doi: 10.3724/SP.J.1146.2008.01561
Abstract:
A method of ground moving target detection based on subband and subaperture ATI image series is proposed. It exploits the wideband, large beamwidth and low frequency characteristics of UWB SAR to generate a series of subband and subaperture ATI image...
A method of ground moving target detection based on subband and subaperture ATI image series is proposed. It exploits the wideband, large beamwidth and low frequency characteristics of UWB SAR to generate a series of subband and subaperture ATI image...
2010, 32(1): 69-74.
doi: 10.3724/SP.J.1146.2008.01636
Abstract:
Repeater jamming is an effective means to Synthetic Aperture Radar(SAR). In this paper, the principle of the SAR repeater jamming is introduced, and the positions and imaging quality of the illusory targets are also discussed. Meanwhile, considering ...
Repeater jamming is an effective means to Synthetic Aperture Radar(SAR). In this paper, the principle of the SAR repeater jamming is introduced, and the positions and imaging quality of the illusory targets are also discussed. Meanwhile, considering ...
2010, 32(1): 75-79.
doi: 10.3724/SP.J.1146.2009.00121
Abstract:
Bi-SAR system is characterized by strong anti-interference capability, this paper analyzes the deceptive jamming to the Bi-SAR with non-precision positioning receiver. The model of deceptive jamming against Bi-SAR is given, then the defocus issue of ...
Bi-SAR system is characterized by strong anti-interference capability, this paper analyzes the deceptive jamming to the Bi-SAR with non-precision positioning receiver. The model of deceptive jamming against Bi-SAR is given, then the defocus issue of ...
2010, 32(1): 80-85.
doi: 10.3724/SP.J.1146.2009.00015
Abstract:
This paper presents a Time-Delay Recurrent Neural Network (TDRNN) for exo-atmospheric ballistic space infrared target discrimination. The TDRNN employs adaptive time delays and recurrences where the adaptive time delays make the network choose the op...
This paper presents a Time-Delay Recurrent Neural Network (TDRNN) for exo-atmospheric ballistic space infrared target discrimination. The TDRNN employs adaptive time delays and recurrences where the adaptive time delays make the network choose the op...
2010, 32(1): 86-91.
doi: 10.3724/SP.J.1146.2008.01774
Abstract:
Concerning the distortion, robustness and decoding error probability, this paper analyses the performance of Distortion-Compensated Quantization Index Modulation (DC-QIM) watermarking scheme with a scaling factor of step. On the assumption that quant...
Concerning the distortion, robustness and decoding error probability, this paper analyses the performance of Distortion-Compensated Quantization Index Modulation (DC-QIM) watermarking scheme with a scaling factor of step. On the assumption that quant...
2010, 32(1): 92-97.
doi: 10.3724/SP.J.1146.2008.01698
Abstract:
To deal with the problem of premature convergence of the traditional K-means algorithm, a novel K-means cluster method based on the enhanced Particle Swarm Optimization(PSO) algorithm is presented. In this approach, the stochastic mutation operation ...
To deal with the problem of premature convergence of the traditional K-means algorithm, a novel K-means cluster method based on the enhanced Particle Swarm Optimization(PSO) algorithm is presented. In this approach, the stochastic mutation operation ...
2010, 32(1): 98-101.
doi: 10.3724/SP.J.1146.2008.00661
Abstract:
In this paper, a new DOA and angular spread estimation algorithm for incoherently distributed source is proposed. According to covariance matrixs structure character of the spatial frequency model of single incoherently distributed source, the covari...
In this paper, a new DOA and angular spread estimation algorithm for incoherently distributed source is proposed. According to covariance matrixs structure character of the spatial frequency model of single incoherently distributed source, the covari...
2010, 32(1): 102-106.
doi: 10.3724/SP.J.1146.2008.01769
Abstract:
SNR (Signal-to-Noise Ratio) is an important parameter in communication signal processing and many algorithms need this information to obtain optimal performance. Firstly, signal power is calculated by determining spectral domain of Intermediate Frequ...
SNR (Signal-to-Noise Ratio) is an important parameter in communication signal processing and many algorithms need this information to obtain optimal performance. Firstly, signal power is calculated by determining spectral domain of Intermediate Frequ...
2010, 32(1): 107-111.
doi: 10.3724/SP.J.1146.2008.01768
Abstract:
In actual environments the performance of speech recognition system may be degraded significantly because of the mismatch between the training and testing conditions. Model adaptation is an efficient approach that could reduce this mismatch, which ad...
In actual environments the performance of speech recognition system may be degraded significantly because of the mismatch between the training and testing conditions. Model adaptation is an efficient approach that could reduce this mismatch, which ad...
2010, 32(1): 112-116.
doi: 10.3724/SP.J.1146.2008.01810
Abstract:
In coding theory, it is important to study the distance distribution of codewords. The Homogeneous weight over ring R=F2+uF2++uk-1F2 is defined. Hamming distances and Homogeneous distances of (1+u)-constacyclic codes of length 2S over the ring R are ...
In coding theory, it is important to study the distance distribution of codewords. The Homogeneous weight over ring R=F2+uF2++uk-1F2 is defined. Hamming distances and Homogeneous distances of (1+u)-constacyclic codes of length 2S over the ring R are ...
2010, 32(1): 117-122.
doi: 10.3724/SP.J.1146.2008.01664
Abstract:
This paper addresses the video distortion of intra-frame coding in multigeneration, which is introduced by the current clip operation and intra-frame prediction. In order to implement the Re-Loss-Free (RLF) intra-frame coding in modified H.264, a nov...
This paper addresses the video distortion of intra-frame coding in multigeneration, which is introduced by the current clip operation and intra-frame prediction. In order to implement the Re-Loss-Free (RLF) intra-frame coding in modified H.264, a nov...
2010, 32(1): 123-128.
doi: 10.3724/SP.J.1146.2008.01667
Abstract:
Based on the Variational Bayes (VB) method, a novel low complexity semi-blind Bayesian iterative receiver with joint signal detection and channel tracking is proposed for MIMO-OFDM systems over time-varying multi-path channel. Using the VB Expectatio...
Based on the Variational Bayes (VB) method, a novel low complexity semi-blind Bayesian iterative receiver with joint signal detection and channel tracking is proposed for MIMO-OFDM systems over time-varying multi-path channel. Using the VB Expectatio...
2010, 32(1): 129-134.
doi: 10.3724/SP.J.1146.2009.00517
Abstract:
In this paper, the DET (Double Eigenvalue Threshold) cooperative spectrum sensing algorithm is proposed through analyzing maximum eigenvalue distribution of the covariance matrix of the received signals by means of random matrix theory. DET cooperati...
In this paper, the DET (Double Eigenvalue Threshold) cooperative spectrum sensing algorithm is proposed through analyzing maximum eigenvalue distribution of the covariance matrix of the received signals by means of random matrix theory. DET cooperati...
2010, 32(1): 135-140.
doi: 10.3724/SP.J.1146.2008.01576
Abstract:
Dynamic subchannel allocation based MIMO-OFDM beamforming system outperforms conventional MIMO-OFDM beamforming system with considerable gain. Unfortunately, the imperfect channel state information, which is due to processing or feedback time delay, ...
Dynamic subchannel allocation based MIMO-OFDM beamforming system outperforms conventional MIMO-OFDM beamforming system with considerable gain. Unfortunately, the imperfect channel state information, which is due to processing or feedback time delay, ...
2010, 32(1): 141-145.
doi: 10.3724/SP.J.1146.2008.01776
Abstract:
Considering the dynamic nature in Cognitive Radio (CR) system, differential game theory is adopted in power control for CR system and a novel model of noncooperative differential game for power control is presented. Then a distributed noncooperative ...
Considering the dynamic nature in Cognitive Radio (CR) system, differential game theory is adopted in power control for CR system and a novel model of noncooperative differential game for power control is presented. Then a distributed noncooperative ...
2010, 32(1): 146-150.
doi: 10.3724/SP.J.1146.2008.01815
Abstract:
The block-modulated based OFDM algorithm is presented in MIMO-OFDM system to reduce the cost that is taken up by the Cyclic Prefix (CP). At each transmitter antenna, P OFDM data blocks are modulated jointly and framed together to use one single CP, a...
The block-modulated based OFDM algorithm is presented in MIMO-OFDM system to reduce the cost that is taken up by the Cyclic Prefix (CP). At each transmitter antenna, P OFDM data blocks are modulated jointly and framed together to use one single CP, a...
2010, 32(1): 151-156.
doi: 10.3724/SP.J.1146.2009.00050
Abstract:
In this paper, theoretical analysis and simulations are performed on the performance of synchronous shortwave Differential Frequency Hopping (DFH) systems in the Multiple-Access (MA) communications. Single-user detection and multi-user detection are ...
In this paper, theoretical analysis and simulations are performed on the performance of synchronous shortwave Differential Frequency Hopping (DFH) systems in the Multiple-Access (MA) communications. Single-user detection and multi-user detection are ...
2010, 32(1): 157-161.
doi: 10.3724/SP.J.1146.2008.01846
Abstract:
3D cipher is a new block cipher proposed in CANS 2008. It is different from all known block cipher as it uses the three dimension structure. According to the structure properties of 3D cipher, a new 5.25-round and a new 6.25-round square distinguishe...
3D cipher is a new block cipher proposed in CANS 2008. It is different from all known block cipher as it uses the three dimension structure. According to the structure properties of 3D cipher, a new 5.25-round and a new 6.25-round square distinguishe...
2010, 32(1): 162-165.
doi: 10.3724/SP.J.1146.2009.00030
Abstract:
Dividing the cover image into matrix blocks, using the pixels in the matrix blocks repeatedly, this paper constructs a new double-layered steganographic algorithm based on Hamming code and wet paper code. For each matrix block, the secret message is ...
Dividing the cover image into matrix blocks, using the pixels in the matrix blocks repeatedly, this paper constructs a new double-layered steganographic algorithm based on Hamming code and wet paper code. For each matrix block, the secret message is ...
2010, 32(1): 166-171.
doi: 10.3724/SP.J.1146.2008.01800
Abstract:
A multi-sensor feature fusion algorithm based on improved Local Discriminant Bases (LDB) and Binary Particle Swarm Optimization (BPSO) is proposed in this paper to satisfy the requirement of application on classification of ground targets in wireless...
A multi-sensor feature fusion algorithm based on improved Local Discriminant Bases (LDB) and Binary Particle Swarm Optimization (BPSO) is proposed in this paper to satisfy the requirement of application on classification of ground targets in wireless...
2010, 32(1): 172-177.
doi: 10.3724/SP.J.1146.2008.01783
Abstract:
This paper presents a new physical network topology discovery algorithm. The tree form is applied to describe the connections between switches. Based on this theory, the topology discovery is completed by using spanning tree set to deduce tree change...
This paper presents a new physical network topology discovery algorithm. The tree form is applied to describe the connections between switches. Based on this theory, the topology discovery is completed by using spanning tree set to deduce tree change...
2010, 32(1): 178-182.
doi: 10.3724/SP.J.1146.2008.01516
Abstract:
Due to heterogeneous network environment with the characteristics of uncertainty for unlicensed users, based on the theory of Partially Observable Markov Decision Process (POMDP) model, a novel multi-radio multi-channel channel state prediction algor...
Due to heterogeneous network environment with the characteristics of uncertainty for unlicensed users, based on the theory of Partially Observable Markov Decision Process (POMDP) model, a novel multi-radio multi-channel channel state prediction algor...
2010, 32(1): 189-194.
doi: 10.3724/SP.J.1146.2009.00694
Abstract:
The Heterogeneous Wireless Sensor Networks (HWSN), which is more univeral, shows a lack of the study for coverage force sections. Therefore a novel localized method for analyzing the distribution of coverage forcethe Coverage Force Algorithm (CFA) is...
The Heterogeneous Wireless Sensor Networks (HWSN), which is more univeral, shows a lack of the study for coverage force sections. Therefore a novel localized method for analyzing the distribution of coverage forcethe Coverage Force Algorithm (CFA) is...
2010, 32(1): 195-198.
doi: 10.3724/SP.J.1146.2008.01703
Abstract:
To reduce the faults caused by thickness resonance in the traditional numerical analysis method, and achieve the coexistence between the high analysis precision and the high efficiency of the Left-Hand Materials(LHMs), the neural network model based ...
To reduce the faults caused by thickness resonance in the traditional numerical analysis method, and achieve the coexistence between the high analysis precision and the high efficiency of the Left-Hand Materials(LHMs), the neural network model based ...
2010, 32(1): 199-202.
doi: 10.3724/SP.J.1146.2009.00046
Abstract:
A novel stop-band FSS structure which is used to reduce the RCS of antenna is presented in this paper. For incident waves, the proposed structure has narrow stopband and wide pass band. Hence, the conventional metallic ground plane can be replaced wi...
A novel stop-band FSS structure which is used to reduce the RCS of antenna is presented in this paper. For incident waves, the proposed structure has narrow stopband and wide pass band. Hence, the conventional metallic ground plane can be replaced wi...
2010, 32(1): 203-209.
doi: 10.3724/SP.J.1146.2008.01763
Abstract:
Readout circuit is a key factor determining the performance of MEMS gyroscope system, being at the forefront of the signal loop. This paper presents a low-noise readout circuit for a bulk micromachined tuning fork gyroscope. Using the chopper techniq...
Readout circuit is a key factor determining the performance of MEMS gyroscope system, being at the forefront of the signal loop. This paper presents a low-noise readout circuit for a bulk micromachined tuning fork gyroscope. Using the chopper techniq...
2010, 32(1): 210-213.
doi: 10.3724/SP.J.1146.2009.00042
Abstract:
This paper studies the signal crosstalk due to redundant object defect of adjacent copper interconnects. The models of coupling capacitance and mutual inductance between redundant defect and interconnects are presented, and it can be used to quantita...
This paper studies the signal crosstalk due to redundant object defect of adjacent copper interconnects. The models of coupling capacitance and mutual inductance between redundant defect and interconnects are presented, and it can be used to quantita...
2010, 32(1): 214-218.
doi: 10.3724/SP.J.1146.2008.01718
Abstract:
Through the study of the working principle and structure of Clocked Transmission Gate Adiabatic Logic (CTGAL) and digital comparator, a new design scheme of digital comparator which has the pre-computational function is proposed based on CTGAL. The s...
Through the study of the working principle and structure of Clocked Transmission Gate Adiabatic Logic (CTGAL) and digital comparator, a new design scheme of digital comparator which has the pre-computational function is proposed based on CTGAL. The s...
2010, 32(1): 227-230.
doi: 10.3724/SP.J.1146.2008.01588
Abstract:
A new design method is presented for designing FTFN(Four-Terminal Floating Nullor)-RC filter of arbitrary order with signal flow graph. A FTFN-RC configuration that can be used to realize arbitrary order transfer function is obtained by direct analys...
A new design method is presented for designing FTFN(Four-Terminal Floating Nullor)-RC filter of arbitrary order with signal flow graph. A FTFN-RC configuration that can be used to realize arbitrary order transfer function is obtained by direct analys...
2010, 32(1): 231-234.
doi: 10.3724/SP.J.1146.2009.00345
Abstract:
This paper studies the effect of the varying load on the transmission characteristics of a two-port network and defines the load insensitivity network as the minimum mismatch network. A fifth order minimum mismatch filter is designed by using of Mont...
This paper studies the effect of the varying load on the transmission characteristics of a two-port network and defines the load insensitivity network as the minimum mismatch network. A fifth order minimum mismatch filter is designed by using of Mont...
2010, 32(1): 235-239.
doi: 10.3724/SP.J.1146.2009.00117
Abstract:
The significant problem for the implementation of distributed space-time encoding and decoding in multi-user cooperative MIMO is the adaptive space-time equalization algorithm with low detection complexity and fast convergence property. Space-time De...
The significant problem for the implementation of distributed space-time encoding and decoding in multi-user cooperative MIMO is the adaptive space-time equalization algorithm with low detection complexity and fast convergence property. Space-time De...
2010, 32(1): 183-188.
doi: 10.3724/SP.J.1146.2009.00461
Abstract:
In order to resolve the problems of concentrating key management and over-consumption on certificate maintenance in space network, an identity-based distributed key management scheme is proposed. On the basis of the properties of space network, the m...
In order to resolve the problems of concentrating key management and over-consumption on certificate maintenance in space network, an identity-based distributed key management scheme is proposed. On the basis of the properties of space network, the m...
2010, 32(1): 219-226.
doi: 10.3724/SP.J.1146.2009.00091
Abstract:
Image Quality Assessment (IQA) is a hot research area in the field of image processing. In this paper, objective and subjective IQA methods are reviewed, and more attention is paid to the former. PSNR and MSE, which are commonly used to assess the qu...
Image Quality Assessment (IQA) is a hot research area in the field of image processing. In this paper, objective and subjective IQA methods are reviewed, and more attention is paid to the former. PSNR and MSE, which are commonly used to assess the qu...
