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2013 Vol. 35, No. 1
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2013, 35(1): 1-7.
doi: 10.3724/SP.J.1146.2012.00851
Abstract:
In the inverse synthetic aperture radar imaging of ballistic mid-course targets with unsymmetrical appendix parts, the image of the main body may be shadowed by the echo component induced by the unsymmetrical appendix parts. In this paper, the echo m...
In the inverse synthetic aperture radar imaging of ballistic mid-course targets with unsymmetrical appendix parts, the image of the main body may be shadowed by the echo component induced by the unsymmetrical appendix parts. In this paper, the echo m...
2013, 35(1): 8-14.
doi: 10.3724/SP.J.1146.2012.00749
Abstract:
A new practical approach for ground fast-moving target detection and imaging is presented for the three-channel SAR-Ground Moving Target Indication (SAR-GMTI) system based on the forward-looking configuration. Considering the facts that fast-moving t...
A new practical approach for ground fast-moving target detection and imaging is presented for the three-channel SAR-Ground Moving Target Indication (SAR-GMTI) system based on the forward-looking configuration. Considering the facts that fast-moving t...
2013, 35(1): 15-23.
doi: 10.3724/SP.J.1146.2012.01094
Abstract:
The Across Range Unit (ARU) effect, mismatch issue in the matched filter and the aperture fill phenomenon can badly deteriorate the performance of high-speed weak target detection in wideband Digital Array Radar (DAR). To address these issues, a nove...
The Across Range Unit (ARU) effect, mismatch issue in the matched filter and the aperture fill phenomenon can badly deteriorate the performance of high-speed weak target detection in wideband Digital Array Radar (DAR). To address these issues, a nove...
2013, 35(1): 24-28.
doi: 10.3724/SP.J.1146.2012.00758
Abstract:
Fierce sea clutter submerges the slow weak target echo which makes the target detection difficult. To address the problem, a Constant False Alarm Rate (CFAR) detection method based on orthogonal projection is proposed in this paper. Utilizing the cor...
Fierce sea clutter submerges the slow weak target echo which makes the target detection difficult. To address the problem, a Constant False Alarm Rate (CFAR) detection method based on orthogonal projection is proposed in this paper. Utilizing the cor...
2013, 35(1): 29-35.
doi: 10.3724/SP.J.1146.2011.01370
Abstract:
In order to meet the growing demands for high resolution SAR imaging, this paper describes a new single channel transmit, multi-channel parallel receive high resolution SAR system. The system operates with 8 parallel receive channels to obtain a wide...
In order to meet the growing demands for high resolution SAR imaging, this paper describes a new single channel transmit, multi-channel parallel receive high resolution SAR system. The system operates with 8 parallel receive channels to obtain a wide...
2013, 35(1): 36-40.
doi: 10.3724/SP.J.1146.2012.00669
Abstract:
To reduce the computational complexity of conventional cancellation algorithm in passive radar system, a fast cancellation by the Pseudo-Noise (PN) sequence in the Digital Television Terrestrial Broadcasting (DTTB) illuminator is proposed. Based on t...
To reduce the computational complexity of conventional cancellation algorithm in passive radar system, a fast cancellation by the Pseudo-Noise (PN) sequence in the Digital Television Terrestrial Broadcasting (DTTB) illuminator is proposed. Based on t...
2013, 35(1): 41-48.
doi: 10.3724/SP.J.1146.2012.00764
Abstract:
Multi-channel wideband radar requires not only the ability of high-resolution imaging for wide coverage, but also the ability of moving target detection. This paper proposes a method based on three-channel Terrain Observation by Progressive scan SAR ...
Multi-channel wideband radar requires not only the ability of high-resolution imaging for wide coverage, but also the ability of moving target detection. This paper proposes a method based on three-channel Terrain Observation by Progressive scan SAR ...
2013, 35(1): 49-55.
doi: 10.3724/SP.J.1146.2011.01162
Abstract:
Considering the phase wrapping issue in the cross-range scaling of interferometric ISAR, a novel algorithm of cross-range scaling is proposed based on Randomized Hough Transform (RHT). Using the linear relationship between the azimuth positions deriv...
Considering the phase wrapping issue in the cross-range scaling of interferometric ISAR, a novel algorithm of cross-range scaling is proposed based on Randomized Hough Transform (RHT). Using the linear relationship between the azimuth positions deriv...
2013, 35(1): 56-62.
doi: 10.3724/SP.J.1146.2012.00647
Abstract:
This paper aims at analyzing the applicability of the hyperbolic range model meeting resolution higher than one meter for low-earth orbital spaceborne SAR. How long the integration time can the range model be applied to, and the corresponding azimuth...
This paper aims at analyzing the applicability of the hyperbolic range model meeting resolution higher than one meter for low-earth orbital spaceborne SAR. How long the integration time can the range model be applied to, and the corresponding azimuth...
2013, 35(1): 63-67.
doi: 10.3724/SP.J.1146.2012.00012
Abstract:
This paper proposes a new carrier tracking loop based on Extended Kalman Filter (EKF) with no data aided in low Signal-to-Noise Ratio (SNR) and high dynamic environment. It utilizes the outputs of accumulator after symbol decision as the observation ...
This paper proposes a new carrier tracking loop based on Extended Kalman Filter (EKF) with no data aided in low Signal-to-Noise Ratio (SNR) and high dynamic environment. It utilizes the outputs of accumulator after symbol decision as the observation ...
2013, 35(1): 68-73.
doi: 10.3724/SP.J.1146.2012.00345
Abstract:
In order to solve the problem that it is difficult to acquire high precision angular velocity parameter in airborne passive location based on spatial-frequency domain information, this paper utilizes phase difference rate-of-changes augmentation to a...
In order to solve the problem that it is difficult to acquire high precision angular velocity parameter in airborne passive location based on spatial-frequency domain information, this paper utilizes phase difference rate-of-changes augmentation to a...
2013, 35(1): 74-79.
doi: 10.3724/SP.J.1146.2012.00631
Abstract:
The issue of poor error-tolerance and polynomial taps restriction of Walsh Hadamard Transform (WHT) estimation method is studied and a novel soft fast PN sequence estimation algorithm based on weighting Walsh Hadamard Transform is proposed in this pa...
The issue of poor error-tolerance and polynomial taps restriction of Walsh Hadamard Transform (WHT) estimation method is studied and a novel soft fast PN sequence estimation algorithm based on weighting Walsh Hadamard Transform is proposed in this pa...
2013, 35(1): 80-84.
doi: 10.3724/SP.J.1146.2012.00742
Abstract:
A convex optimization based Khatri-Rao subspace wideband Direction-Of-Arrive (DOA) estimation algorithm is proposed in this paper. First of all, the steering vectors of the virtual array are formulated with the Khatri-Rao subspace. And then these ste...
A convex optimization based Khatri-Rao subspace wideband Direction-Of-Arrive (DOA) estimation algorithm is proposed in this paper. First of all, the steering vectors of the virtual array are formulated with the Khatri-Rao subspace. And then these ste...
2013, 35(1): 85-91.
doi: 10.3724/SP.J.1146.2012.00735
Abstract:
In an Alpha stable distribution noise environment, the traditional methods of digital modulation signals recognition have the problems of poor performance. A novel recognition method based on generalized fractional Fourier transform and fractional lo...
In an Alpha stable distribution noise environment, the traditional methods of digital modulation signals recognition have the problems of poor performance. A novel recognition method based on generalized fractional Fourier transform and fractional lo...
2013, 35(1): 92-98.
doi: 10.3724/SP.J.1146.2011.01224
Abstract:
The Craomr-Rao Bound (CRB) expression of near-field distance estimation for underwater source is first presented. Furthermore, the CRB of far-field Direction-Of-Arrival (DOA) estimation is deduced. The characteristics and factors of CRB results are s...
The Craomr-Rao Bound (CRB) expression of near-field distance estimation for underwater source is first presented. Furthermore, the CRB of far-field Direction-Of-Arrival (DOA) estimation is deduced. The characteristics and factors of CRB results are s...
2013, 35(1): 99-105.
doi: 10.3724/SP.J.1146.2012.00819
Abstract:
A novel image denoising method is proposed by using non-local approximation of low-rank based on random projection. The cluster of similar patch for each pixel point is found by using methods of non-local searching, and then compute low-rank approxim...
A novel image denoising method is proposed by using non-local approximation of low-rank based on random projection. The cluster of similar patch for each pixel point is found by using methods of non-local searching, and then compute low-rank approxim...
2013, 35(1): 106-112.
doi: 10.3724/SP.J.1146.2012.00726
Abstract:
Combining with the new features of the H.264/AVC video coding standard, a new reversible fragile video watermarking algorithm is proposed. The hash value of quantized Discrete Cosine Transform (DCT) coefficients of predictive residue blocks is perfor...
Combining with the new features of the H.264/AVC video coding standard, a new reversible fragile video watermarking algorithm is proposed. The hash value of quantized Discrete Cosine Transform (DCT) coefficients of predictive residue blocks is perfor...
2013, 35(1): 113-118.
doi: 10.3724/SP.J.1146.2012.00799
Abstract:
Most pen-based user interfaces are incapable of recognizing both graphical symbols and text with a single recognizer. Thus, it is essential to distinguish between graphical strokes and textual ones before feeding them into the appropriate recognizer....
Most pen-based user interfaces are incapable of recognizing both graphical symbols and text with a single recognizer. Thus, it is essential to distinguish between graphical strokes and textual ones before feeding them into the appropriate recognizer....
2013, 35(1): 119-125.
doi: 10.3724/SP.J.1146.2012.00936
Abstract:
Energy efficiency is a primary challenge in wireless body sensor networks for the long-term physical movement monitoring. In order to reduce the energy consumption while maintaining the sufficient classification accuracy of the human activity, a comp...
Energy efficiency is a primary challenge in wireless body sensor networks for the long-term physical movement monitoring. In order to reduce the energy consumption while maintaining the sufficient classification accuracy of the human activity, a comp...
2013, 35(1): 126-132.
doi: 10.3724/SP.J.1146.2012.00602
Abstract:
The substrate link failures have made a great impact on the reliability of Reconfigurable Service Carrying Networks (RSCNs) over Reconfigurable Flexible Network (RFNet). In this paper, the reliability problem of delay-sensitive RSCNs is solved based ...
The substrate link failures have made a great impact on the reliability of Reconfigurable Service Carrying Networks (RSCNs) over Reconfigurable Flexible Network (RFNet). In this paper, the reliability problem of delay-sensitive RSCNs is solved based ...
A Cross-layer Energy-efficient Bidirectional Gradient Routing Algorithm for Wireless Sensor Networks
2013, 35(1): 133-140.
doi: 10.3724/SP.J.1146.2012.00368
Abstract:
To reduce the redundant control overhead in the process of creating downstream routes and the mechanism of updating energy information, a Cross-layer Energy-efficient Bidirectional Routing(CEBR) algorithm is proposed. CEBR establishes downstream rout...
To reduce the redundant control overhead in the process of creating downstream routes and the mechanism of updating energy information, a Cross-layer Energy-efficient Bidirectional Routing(CEBR) algorithm is proposed. CEBR establishes downstream rout...
2013, 35(1): 141-146.
doi: 10.3724/SP.J.1146.2011.01178
Abstract:
With the store-carry-forward transmitting manner in social intermittently connected mobile network, the nodes always behave in community movement model. A community structure detecting method is proposed based on similarity and community label propag...
With the store-carry-forward transmitting manner in social intermittently connected mobile network, the nodes always behave in community movement model. A community structure detecting method is proposed based on similarity and community label propag...
2013, 35(1): 147-150.
doi: 10.3724/SP.J.1146.2012.00468
Abstract:
A cooperative handover mechanism based on a Hierarchical Network Coding (HNC) is proposed for multi-hop, multi-path handover scenario in wireless internet of things in this paper. Based on traditional practical network coding, HNC makes use of the di...
A cooperative handover mechanism based on a Hierarchical Network Coding (HNC) is proposed for multi-hop, multi-path handover scenario in wireless internet of things in this paper. Based on traditional practical network coding, HNC makes use of the di...
2013, 35(1): 151-158.
doi: 10.3724/SP.J.1146.2012.00782
Abstract:
For the mobility issue in Locator/Identifier Separation Protocol (LISP) networks, a network-based Secure Mobility Control Protocol (LISP-SMCP) is proposed. Taking access networks as different mobile domains, LISP SMCP supports mobile nodes intra-doma...
For the mobility issue in Locator/Identifier Separation Protocol (LISP) networks, a network-based Secure Mobility Control Protocol (LISP-SMCP) is proposed. Taking access networks as different mobile domains, LISP SMCP supports mobile nodes intra-doma...
2013, 35(1): 159-165.
doi: 10.3724/SP.J.1146.2012.00316
Abstract:
In order to plan wireless mesh network rationally and ensure that the network could work reliably in the long-term under the condition of saving wireless resource, a calculation formula is defined for normalized relative reliability constraint among ...
In order to plan wireless mesh network rationally and ensure that the network could work reliably in the long-term under the condition of saving wireless resource, a calculation formula is defined for normalized relative reliability constraint among ...
2013, 35(1): 166-171.
doi: 10.3724/SP.J.1146.2012.00716
Abstract:
A joint estimation method of Doppler frequency shift and Doppler frequency rate based on interpolation is proposed for achieving fast carrier synchronization of burst in mobile satellite communication system under the circumstance of low Signal-to-No...
A joint estimation method of Doppler frequency shift and Doppler frequency rate based on interpolation is proposed for achieving fast carrier synchronization of burst in mobile satellite communication system under the circumstance of low Signal-to-No...
2013, 35(1): 172-177.
doi: 10.3724/SP.J.1146.2012.00762
Abstract:
A Carrier Frequency Offset (CFO) estimation method is proposed based on signal detection in Superposition Coded Modulation (SCM)-OFDM systems. This method reconstructs first the received signal by decision symbols from the SCM iterative detector, and...
A Carrier Frequency Offset (CFO) estimation method is proposed based on signal detection in Superposition Coded Modulation (SCM)-OFDM systems. This method reconstructs first the received signal by decision symbols from the SCM iterative detector, and...
2013, 35(1): 178-184.
doi: 10.3724/SP.J.1146.2012.00821
Abstract:
Because of the usage of practical windowed pulse shaping filter and limitation of real field orthogonality of OFDM with Offset QAM (OFDM/OQAM) systems, the zero-forcing equalization as signal detector can not completely remove the Inter-Symbol Interf...
Because of the usage of practical windowed pulse shaping filter and limitation of real field orthogonality of OFDM with Offset QAM (OFDM/OQAM) systems, the zero-forcing equalization as signal detector can not completely remove the Inter-Symbol Interf...
2013, 35(1): 185-190.
doi: 10.3724/SP.J.1146.2012.00772
Abstract:
This paper focuses on the semi-blind equalization for Multiple-Input Multiple-Output (MIMO) systems with Quadrature Amplitude Modulation (QAM) signal. Combining the advantages of simplicity of Square Contour Algorithm (SCA) and accuracy of Soft Decis...
This paper focuses on the semi-blind equalization for Multiple-Input Multiple-Output (MIMO) systems with Quadrature Amplitude Modulation (QAM) signal. Combining the advantages of simplicity of Square Contour Algorithm (SCA) and accuracy of Soft Decis...
2013, 35(1): 191-195.
doi: 10.3724/SP.J.1146.2012.00837
Abstract:
The generalized cyclotomic sequences with length pm has high linear complexity. In this paper, a class of error generalized cyclotomic sequences is constructed by changing the characteristic sets of the above sequences. The results show that the (p1)...
The generalized cyclotomic sequences with length pm has high linear complexity. In this paper, a class of error generalized cyclotomic sequences is constructed by changing the characteristic sets of the above sequences. The results show that the (p1)...
2013, 35(1): 196-202.
doi: 10.3724/SP.J.1146.2012.00746
Abstract:
Considering the anisotropic characteristics of screen content, satisfactory coding efficiency cannot be achieved when screen content is coded only by traditional image/video coding tools. A new Dual-coder Mixed Chroma-sampling-rate (DMC) technique is...
Considering the anisotropic characteristics of screen content, satisfactory coding efficiency cannot be achieved when screen content is coded only by traditional image/video coding tools. A new Dual-coder Mixed Chroma-sampling-rate (DMC) technique is...
2013, 35(1): 203-208.
doi: 10.3724/SP.J.1146.2012.00590
Abstract:
For most of those existing block-based compressed sensing of video, the same measurement matrix is usually utilized for all blocks, which underestimates the fact that the structural complexity and the movement varies from different regions. To addres...
For most of those existing block-based compressed sensing of video, the same measurement matrix is usually utilized for all blocks, which underestimates the fact that the structural complexity and the movement varies from different regions. To addres...
2013, 35(1): 209-214.
doi: 10.3724/SP.J.1146.2012.00658
Abstract:
A novel Crank-Nicolson (CN)-FDTD method based on the split-step scheme is proposed in this paper, so as to calculate the electromagnetic transients in transmission line with complex circuit terminals accurately and efficiently. An analytical proof of...
A novel Crank-Nicolson (CN)-FDTD method based on the split-step scheme is proposed in this paper, so as to calculate the electromagnetic transients in transmission line with complex circuit terminals accurately and efficiently. An analytical proof of...
2013, 35(1): 215-227.
doi: 10.3724/SP.J.1146.2012.00876
Abstract:
Based on analyzing overseas and domestic research status and technology readiness levels of wireless sensor networks (WSNs), the correlation between WSNs and Internet of Things (IoT) is described from a technical point. Key technologies required for ...
Based on analyzing overseas and domestic research status and technology readiness levels of wireless sensor networks (WSNs), the correlation between WSNs and Internet of Things (IoT) is described from a technical point. Key technologies required for ...
