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2012 Vol. 34, No. 5
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2012, 34(5): 1017-1023.
doi: 10.3724/SP.J.1146.2011.01003
Abstract:
Downward-looking 3-D Synthetic Aperture Radar (SAR) can be used for three-dimensional reconstruction of the targets in the inferior of the platform of the SAR, and it has wide application prospects. An imaging method of downward-looking 3-D SAR is pr...
Downward-looking 3-D Synthetic Aperture Radar (SAR) can be used for three-dimensional reconstruction of the targets in the inferior of the platform of the SAR, and it has wide application prospects. An imaging method of downward-looking 3-D SAR is pr...
2012, 34(5): 1024-1029.
doi: 10.3724/SP.J.1146.2011.01195
Abstract:
The conventional Ground Penetrating Radar (GPR) imaging algorithms are data-independent, which cause lots of interference like side lobes and clutter. However, the data-adaptive methods have remarkable capability of interference suppression. A data-a...
The conventional Ground Penetrating Radar (GPR) imaging algorithms are data-independent, which cause lots of interference like side lobes and clutter. However, the data-adaptive methods have remarkable capability of interference suppression. A data-a...
2012, 34(5): 1030-1037.
doi: 10.3724/SP.J.1146.2011.00920
Abstract:
An approach based on the square successive difference of neighborhood averages is proposed to extract edges in SAR images. The proposed operator partitions the neighborhood window of a pixel into many non-overlapping regions, and applies the mean squ...
An approach based on the square successive difference of neighborhood averages is proposed to extract edges in SAR images. The proposed operator partitions the neighborhood window of a pixel into many non-overlapping regions, and applies the mean squ...
2012, 34(5): 1038-1044.
doi: 10.3724/SP.J.1146.2011.00938
Abstract:
A novel mixed iteration filtering algorithm is presented to reduce speckle noise in SAR image by combining the Lee filter with variable-size windows and self-snake diffusion, and an effect method to estimate noises variance of SAR image is given. Loc...
A novel mixed iteration filtering algorithm is presented to reduce speckle noise in SAR image by combining the Lee filter with variable-size windows and self-snake diffusion, and an effect method to estimate noises variance of SAR image is given. Loc...
2012, 34(5): 1045-1050.
doi: 10.3724/SP.J.1146.2011.01120
Abstract:
In Ground Penetrating Radar (GPR) applications such as detection of targets located in layered medium, the time-domain Back Projection (BP) imaging algorithm is a commonly used imaging technique. However, the heavy computation burden and low-quality ...
In Ground Penetrating Radar (GPR) applications such as detection of targets located in layered medium, the time-domain Back Projection (BP) imaging algorithm is a commonly used imaging technique. However, the heavy computation burden and low-quality ...
2012, 34(5): 1051-1056.
doi: 10.3724/SP.J.1146.2011.00986
Abstract:
This paper estimates high-resolution radial velocity and range profile of moving target for Ultra- WideBand (UWB) radar via State-Space (SS) method. First, an impulse response of scatterers in frequency domain is obtained by utilizing the echo with s...
This paper estimates high-resolution radial velocity and range profile of moving target for Ultra- WideBand (UWB) radar via State-Space (SS) method. First, an impulse response of scatterers in frequency domain is obtained by utilizing the echo with s...
2012, 34(5): 1057-1064.
doi: 10.3724/SP.J.1146.2011.00991
Abstract:
The moving target detection based on multiple azimuth resolution images is proposed for Ground Moving Target Indication (GMTI) in the low frequency Synthetic Aperture Radar (SAR). This paper analyzes the characteristics of static and moving target on...
The moving target detection based on multiple azimuth resolution images is proposed for Ground Moving Target Indication (GMTI) in the low frequency Synthetic Aperture Radar (SAR). This paper analyzes the characteristics of static and moving target on...
2012, 34(5): 1065-1069.
doi: 10.3724/SP.J.1146.2011.01010
Abstract:
A high frequency surface wave radar antenna array calibration method using Automatic Identification System (AIS) data is presented. The new method uses ship target echoes with high SNR and their AIS data to find the phase and gain errors of the anten...
A high frequency surface wave radar antenna array calibration method using Automatic Identification System (AIS) data is presented. The new method uses ship target echoes with high SNR and their AIS data to find the phase and gain errors of the anten...
2012, 34(5): 1070-1075.
doi: 10.3724/SP.J.1146.2011.00944
Abstract:
Stepped chirp radars achieve high range resolution through bandwidth synthesis. Precise beginning sampling range is a significant factor which guarantees the performance of bandwidth synthesis. The effect of the beginning sampling range error on band...
Stepped chirp radars achieve high range resolution through bandwidth synthesis. Precise beginning sampling range is a significant factor which guarantees the performance of bandwidth synthesis. The effect of the beginning sampling range error on band...
2012, 34(5): 1076-1081.
doi: 10.3724/SP.J.1146.2011.00921
Abstract:
SAR image despeckling is always a key and indispensable step in SAR image preprocessing. The Bilateral Filtering (BF), which combines grey similarity and spatial closeness to reduce noise, is introduced to SAR image despeckling recently. However, whe...
SAR image despeckling is always a key and indispensable step in SAR image preprocessing. The Bilateral Filtering (BF), which combines grey similarity and spatial closeness to reduce noise, is introduced to SAR image despeckling recently. However, whe...
Coherent Multi-target Localization for Bistatic MIMO Radar Based on Block Hankel Matrix Construction
2012, 34(5): 1082-1087.
doi: 10.3724/SP.J.1146.2011.00896
Abstract:
A new algorithm for angle estimation in the presence of coherent multi-target is presented. A block Hankel matrix is constructed by utilizing the elements of the receive covariance matrix. It is shown that the rank of the block Hankel matrix is equal...
A new algorithm for angle estimation in the presence of coherent multi-target is presented. A block Hankel matrix is constructed by utilizing the elements of the receive covariance matrix. It is shown that the rank of the block Hankel matrix is equal...
2012, 34(5): 1088-1095.
doi: 10.3724/SP.J.1146.2011.00973
Abstract:
Sparse Frequency Waveform (SFW) can be transmitted by radar systems to overcome narrowband interferences. However, SFW suffers the raised range sidelobes generally, leading to worsening detection performance for weak targets. To solve this problem, a...
Sparse Frequency Waveform (SFW) can be transmitted by radar systems to overcome narrowband interferences. However, SFW suffers the raised range sidelobes generally, leading to worsening detection performance for weak targets. To solve this problem, a...
2012, 34(5): 1096-1101.
doi: 10.3724/SP.J.1146.2011.00978
Abstract:
For low frequency spaceborne Synthetic Aperture Radar (SAR) systems, the ionosphere will have a significant effect on SAR calibration. In this paper, an approach for ionospheric effects correction on spaceborne SAR calibration based on Active Radar C...
For low frequency spaceborne Synthetic Aperture Radar (SAR) systems, the ionosphere will have a significant effect on SAR calibration. In this paper, an approach for ionospheric effects correction on spaceborne SAR calibration based on Active Radar C...
2012, 34(5): 1102-1108.
doi: 10.3724/SP.J.1146.2011.00992
Abstract:
Airborne MIMO radar uses its temporal freedom and receiving transmitting spatial freedom to suppress clutter, while it nulls jammers by only receiving spatial freedom. Based on these characteristic, a novel two-stage method is presented in this paper...
Airborne MIMO radar uses its temporal freedom and receiving transmitting spatial freedom to suppress clutter, while it nulls jammers by only receiving spatial freedom. Based on these characteristic, a novel two-stage method is presented in this paper...
2012, 34(5): 1109-1114.
doi: 10.3724/SP.J.1146.2011.01062
Abstract:
It is extremely difficult to extract road from high-resolution SAR images because of the existence of various kinds of disturbances, occlusions and shadowing. A new road center-point extraction method is proposed by combined using local detection and...
It is extremely difficult to extract road from high-resolution SAR images because of the existence of various kinds of disturbances, occlusions and shadowing. A new road center-point extraction method is proposed by combined using local detection and...
2012, 34(5): 1115-1119.
doi: 10.3724/SP.J.1146.2011.00883
Abstract:
Considering the issue that full-dimensional adaptive beam-forming takes usually a large number of sampling data and has very high computation cost by using Sample Matrix Inverse (SMI) algorithm, a new adaptive Beam-Forming algorithm based on Subspace...
Considering the issue that full-dimensional adaptive beam-forming takes usually a large number of sampling data and has very high computation cost by using Sample Matrix Inverse (SMI) algorithm, a new adaptive Beam-Forming algorithm based on Subspace...
2012, 34(5): 1120-1125.
doi: 10.3724/SP.J.1146.2011.01036
Abstract:
To overcome effectively the influence of large steering vector mismatch on the performance of adaptive beamformer, an Iterative diagonally Loaded Sample Matrix Inverse (ILSMI) robust adaptive beamformer is proposed in this paper. The iterative comput...
To overcome effectively the influence of large steering vector mismatch on the performance of adaptive beamformer, an Iterative diagonally Loaded Sample Matrix Inverse (ILSMI) robust adaptive beamformer is proposed in this paper. The iterative comput...
2012, 34(5): 1126-1130.
doi: 10.3724/SP.J.1146.2011.01051
Abstract:
Transmit beampattern for MIMO array with collocated antennas is usually obtained by optimization of signal correlation matrix. These methods have disadvantages of the performance strongly depending on initialization parameters and computation complex...
Transmit beampattern for MIMO array with collocated antennas is usually obtained by optimization of signal correlation matrix. These methods have disadvantages of the performance strongly depending on initialization parameters and computation complex...
2012, 34(5): 1131-1136.
doi: 10.3724/SP.J.1146.2011.00925
Abstract:
In order to achieve efficient coordination multiple point downlink transmission, a single iteration of distributed collaborative beamforming algorithm is proposed based on the merit of maximizing the minimum SINR, and the global convergence of the pr...
In order to achieve efficient coordination multiple point downlink transmission, a single iteration of distributed collaborative beamforming algorithm is proposed based on the merit of maximizing the minimum SINR, and the global convergence of the pr...
2012, 34(5): 1137-1141.
doi: 10.3724/SP.J.1146.2011.01077
Abstract:
For target tracking by using single feature results in a poor performance in robustness, an infrared object tracking method based on adaptive multi-features fusion and Mean Shift (MS) is presented. In order to enhance the important features, the prop...
For target tracking by using single feature results in a poor performance in robustness, an infrared object tracking method based on adaptive multi-features fusion and Mean Shift (MS) is presented. In order to enhance the important features, the prop...
2012, 34(5): 1142-1147.
doi: 10.3724/SP.J.1146.2011.01011
Abstract:
In this paper, an improved TV-Stokes image inpainting model is proposed based on the study of image inpainting. By analysing the properties of new model, an efficient and fast numerical algorithm is introduced. There are two variables in the new mode...
In this paper, an improved TV-Stokes image inpainting model is proposed based on the study of image inpainting. By analysing the properties of new model, an efficient and fast numerical algorithm is introduced. There are two variables in the new mode...
2012, 34(5): 1148-1153.
doi: 10.3724/SP.J.1146.2011.01012
Abstract:
Gait recognition research gets rapid development as one of biometric. Now almost all the gait recognition researcher focus on gait recognition rate only in the single condition, but the gait recognition rate has rapid decline in the wearing coat and ...
Gait recognition research gets rapid development as one of biometric. Now almost all the gait recognition researcher focus on gait recognition rate only in the single condition, but the gait recognition rate has rapid decline in the wearing coat and ...
2012, 34(5): 1154-1161.
doi: 10.3724/SP.J.1146.2011.00887
Abstract:
In object retrieval area, the current mainstream solution is Bag of Visual Words (BoVW) method, but there are several problems existing in the conventional BoVW methods, such as low time efficiency and large memory consumption, the synonymy and ambig...
In object retrieval area, the current mainstream solution is Bag of Visual Words (BoVW) method, but there are several problems existing in the conventional BoVW methods, such as low time efficiency and large memory consumption, the synonymy and ambig...
2012, 34(5): 1162-1167.
doi: 10.3724/SP.J.1146.2011.01014
Abstract:
To address the issue of line pattern mining of non-linear dataset, a new regression algorithm based on density weight Expectation Maximization (EM) and splitting merging strategy is proposed. Point-direction function is first employed to establish th...
To address the issue of line pattern mining of non-linear dataset, a new regression algorithm based on density weight Expectation Maximization (EM) and splitting merging strategy is proposed. Point-direction function is first employed to establish th...
2012, 34(5): 1168-1173.
doi: 10.3724/SP.J.1146.2011.00718
Abstract:
The modernization GPS system employes new Binary Offset Carrier (BOC) modulations, which achieve high performance in anti-jamming and code tracking. BOC modulations can be write as a sum of two coding signals. This can be generalized as multiple Spre...
The modernization GPS system employes new Binary Offset Carrier (BOC) modulations, which achieve high performance in anti-jamming and code tracking. BOC modulations can be write as a sum of two coding signals. This can be generalized as multiple Spre...
2012, 34(5): 1174-1178.
doi: 10.3724/SP.J.1146.2011.00980
Abstract:
Based on a binary sequence with ideal two-level autocorrelation with period N=ML+r, a construction of quaternary Low Correlation Zone (LCZ) sequence set is proposed. The parameters of the resultant quaternary LCZ sequence sets such as length of LCZ a...
Based on a binary sequence with ideal two-level autocorrelation with period N=ML+r, a construction of quaternary Low Correlation Zone (LCZ) sequence set is proposed. The parameters of the resultant quaternary LCZ sequence sets such as length of LCZ a...
2012, 34(5): 1179-1184.
doi: 10.3724/SP.J.1146.2011.00982
Abstract:
This paper presents a bidirectional decoding architecture for double binary convolutional turbo code specified in IEEE 802.16m standard to accelerate its decoding speed. The branch metrics matrix is defined to decrease the decoding computational comp...
This paper presents a bidirectional decoding architecture for double binary convolutional turbo code specified in IEEE 802.16m standard to accelerate its decoding speed. The branch metrics matrix is defined to decrease the decoding computational comp...
2012, 34(5): 1191-1195.
doi: 10.3724/SP.J.1146.2011.00998
Abstract:
For Turbo-like codes, an improved approximate formula of Word Error Rate (WER) is proposed. The formula is simply expressed in the form of the Gaussian Q function, which includes the Signal to Noise Ratio (SNR), the mathematical expectation and the v...
For Turbo-like codes, an improved approximate formula of Word Error Rate (WER) is proposed. The formula is simply expressed in the form of the Gaussian Q function, which includes the Signal to Noise Ratio (SNR), the mathematical expectation and the v...
2012, 34(5): 1196-1201.
doi: 10.3724/SP.J.1146.2011.01024
Abstract:
In asynchronous Vertical Bell Laboratories Layered Space-Time (V-BLAST) over the nonselective Rayleigh fading channel, the performance of the existing detection algorithms improve slowly as the SNR increasing. In this paper, an iterative Parallel Int...
In asynchronous Vertical Bell Laboratories Layered Space-Time (V-BLAST) over the nonselective Rayleigh fading channel, the performance of the existing detection algorithms improve slowly as the SNR increasing. In this paper, an iterative Parallel Int...
2012, 34(5): 1202-1207.
doi: 10.3724/SP.J.1146.2011.00995
Abstract:
In a wireless multicast communication system, the channel state between each receiver and the specified source (i.e. base station) is different. Therefore, it will result in high delay with too high or too low multicast transmission rate at the sourc...
In a wireless multicast communication system, the channel state between each receiver and the specified source (i.e. base station) is different. Therefore, it will result in high delay with too high or too low multicast transmission rate at the sourc...
2012, 34(5): 1208-1213.
doi: 10.3724/SP.J.1146.2011.00919
Abstract:
One of the main requirements of cognitive radio systems is the ability to detect the presence of the primary user with precise accuracy. Previous works on the issue of detection for cognitive radio show that cooperating secondary users in the network...
One of the main requirements of cognitive radio systems is the ability to detect the presence of the primary user with precise accuracy. Previous works on the issue of detection for cognitive radio show that cooperating secondary users in the network...
2012, 34(5): 1214-1219.
doi: 10.3724/SP.J.1146.2011.00953
Abstract:
The traditional CP-OFDM based multiple access technology still has two drawbacks, i.e., adding cyclic prefix reduces the spectrum efficiency and it is sensitive to the Doppler frequency shift. In this paper, the time-frequency localization of the Ext...
The traditional CP-OFDM based multiple access technology still has two drawbacks, i.e., adding cyclic prefix reduces the spectrum efficiency and it is sensitive to the Doppler frequency shift. In this paper, the time-frequency localization of the Ext...
2012, 34(5): 1220-1225.
doi: 10.3724/SP.J.1146.2011.00748
Abstract:
Most of the study on the beamforming design for Two-Way Relaying Network (TWRN) is based on the reciprocity assumption. Assuming channel is nonreciprocal, this paper designs the beamforming coefficients to maximize the sum-rate of the network subject...
Most of the study on the beamforming design for Two-Way Relaying Network (TWRN) is based on the reciprocity assumption. Assuming channel is nonreciprocal, this paper designs the beamforming coefficients to maximize the sum-rate of the network subject...
2012, 34(5): 1226-1230.
doi: 10.3724/SP.J.1146.2011.00744
Abstract:
The multistage Clos network or C(m, n, r) is widely deployed in data communications and parallel computing systems because of its scalability. It is well known the network is strictly non-blocking if m2n-1. A new architecture of Multiple Time Slot Cl...
The multistage Clos network or C(m, n, r) is widely deployed in data communications and parallel computing systems because of its scalability. It is well known the network is strictly non-blocking if m2n-1. A new architecture of Multiple Time Slot Cl...
2012, 34(5): 1231-1238.
doi: 10.3724/SP.J.1146.2011.00914
Abstract:
Network is rigid and close in the traditional technology system, which is not meeting intending abundant different business of scale application. So flexible network technology system facing on service providing is proposed, which change traditional ...
Network is rigid and close in the traditional technology system, which is not meeting intending abundant different business of scale application. So flexible network technology system facing on service providing is proposed, which change traditional ...
2012, 34(5): 1239-1245.
doi: 10.3724/SP.J.1146.2011.00977
Abstract:
A Netcoding-based delay-sensitive Broadcast Transmission scheme (NBT) is proposed for Delay Tolerant Mobile Sensor Network (DTMSN). In NBT, the data are batched transmitting from Base Station (BS) and each batch contains finite number of original pac...
A Netcoding-based delay-sensitive Broadcast Transmission scheme (NBT) is proposed for Delay Tolerant Mobile Sensor Network (DTMSN). In NBT, the data are batched transmitting from Base Station (BS) and each batch contains finite number of original pac...
2012, 34(5): 1246-1251.
doi: 10.3724/SP.J.1146.2011.00906
Abstract:
In order to resolve the problem of images buffering with huge amount of data quantum in large field TDICCD space camera, the control technology of SDRAM which is a high-speed and large capacity data memory is studied. First, the paper explains the im...
In order to resolve the problem of images buffering with huge amount of data quantum in large field TDICCD space camera, the control technology of SDRAM which is a high-speed and large capacity data memory is studied. First, the paper explains the im...
2012, 34(5): 1252-1256.
doi: 10.3724/SP.J.1146.2011.00875
Abstract:
The prospect of memristor application is cheerful with its theory deepening continuously and successful realization, add its unique physical appearance. This paper proposes that memristors have two types: P-type and N-type further. The memristors pos...
The prospect of memristor application is cheerful with its theory deepening continuously and successful realization, add its unique physical appearance. This paper proposes that memristors have two types: P-type and N-type further. The memristors pos...
2012, 34(5): 1257-1262.
doi: 10.3724/SP.J.1146.2011.00934
Abstract:
A miniaturized multilayer 3D micro/nano ammonia sensor chip is designed and prepared. An ammonia nitrogen measurement system utilizing such a miniaturized sensor chip is constructed. The method of ammonia nitrogen measurement using a miniaturized amp...
A miniaturized multilayer 3D micro/nano ammonia sensor chip is designed and prepared. An ammonia nitrogen measurement system utilizing such a miniaturized sensor chip is constructed. The method of ammonia nitrogen measurement using a miniaturized amp...
2012, 34(5): 1263-1267.
doi: 10.3724/SP.J.1146.2011.01146
Abstract:
A Space-Time-phase (ST-phase) united processing method is proposed in this paper. It extends the processing domain form space-time to space-time-phase for separating reverberation and targets. Three sub-arrays are firstly constructed. Then, there is ...
A Space-Time-phase (ST-phase) united processing method is proposed in this paper. It extends the processing domain form space-time to space-time-phase for separating reverberation and targets. Three sub-arrays are firstly constructed. Then, there is ...
2012, 34(5): 1268-1270.
doi: 10.3724/SP.J.1146.2011.00930
Abstract:
This paper presents a new method of testing Delta Radar Cross Section (RCS) of Ultra High Frequency Radio Frequency IDentification (UHF RFID) tag using Giga-hertz Transverse ElectroMagnetic (GTEM) cell. Through the theoretical analysis of RFID tags e...
This paper presents a new method of testing Delta Radar Cross Section (RCS) of Ultra High Frequency Radio Frequency IDentification (UHF RFID) tag using Giga-hertz Transverse ElectroMagnetic (GTEM) cell. Through the theoretical analysis of RFID tags e...
2012, 34(5): 1185-1190.
doi: 10.3724/SP.J.1146.2011.01360
Abstract:
A Binary Exponential Random Degree Distribution (BERDD) is proposed, the generated fountain codes using BERDD function improve the probability of generating degree 1 in encoding, decreases the probability of degree 1 chasm in decoding, so the decodin...
A Binary Exponential Random Degree Distribution (BERDD) is proposed, the generated fountain codes using BERDD function improve the probability of generating degree 1 in encoding, decreases the probability of degree 1 chasm in decoding, so the decodin...
