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2007 Vol. 29, No. 1
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2007, 29(1): 1-5.
doi: 10.3724/SP.J.1146.2005.00590
Abstract:
Based on the principles of ISAR and interferometric observation, a three-dimensional (3D) imaging method of Interferometric ISAR (InISAR) is developed. Making use of compensation of the resultant angular motion parameters for the echoes in the raw da...
Based on the principles of ISAR and interferometric observation, a three-dimensional (3D) imaging method of Interferometric ISAR (InISAR) is developed. Making use of compensation of the resultant angular motion parameters for the echoes in the raw da...
2007, 29(1): 6-11.
doi: 10.3724/SP.J.1146.2005.00634
Abstract:
In this paper the two-dimensional frequency expression of SAR echoes are first analyzed. Then, the standard chirp scaling algorithm and its several modified forms used both in high frequency narrow band SAR and low frequency Ultra WideBand (UWB) SAR ...
In this paper the two-dimensional frequency expression of SAR echoes are first analyzed. Then, the standard chirp scaling algorithm and its several modified forms used both in high frequency narrow band SAR and low frequency Ultra WideBand (UWB) SAR ...
2007, 29(1): 12-14.
doi: 10.3724/SP.J.1146.2005.00649
Abstract:
Minimum Total Variation Autofocus (MTVA) algorithm for SAR imaging is studied. Firstly, the relationship between total variation of SAR image and 2nd-order phase error is analyzed. The results show that total variation is a single peak function of 2n...
Minimum Total Variation Autofocus (MTVA) algorithm for SAR imaging is studied. Firstly, the relationship between total variation of SAR image and 2nd-order phase error is analyzed. The results show that total variation is a single peak function of 2n...
2007, 29(1): 15-18.
doi: 10.3724/SP.J.1146.2005.00442
Abstract:
The passive distributed microsatellites Synthetic Aperture Radar(SAR) system has the capabilities in improving image resolution, detecting ground moving targets and computing digital elevation models. But the input Signal-to-Noise Ratio (SNR) of the ...
The passive distributed microsatellites Synthetic Aperture Radar(SAR) system has the capabilities in improving image resolution, detecting ground moving targets and computing digital elevation models. But the input Signal-to-Noise Ratio (SNR) of the ...
2007, 29(1): 19-22.
doi: 10.3724/SP.J.1146.2005.00269
Abstract:
In this paper, a GMTI method for -beams is investigated, which is achieved by incorporating the along-track interferometric SAR/ GMTI technique with signal subspace processing. The principle of along-track interferometric SAR/ GMTI is analyzed, and t...
In this paper, a GMTI method for -beams is investigated, which is achieved by incorporating the along-track interferometric SAR/ GMTI technique with signal subspace processing. The principle of along-track interferometric SAR/ GMTI is analyzed, and t...
Parameters estimation of Wideband/ Ultra-Wideband LFM Signal Based on Spectrum Compressing Receiving
2007, 29(1): 23-25.
doi: 10.3724/SP.J.1146.2005.00398
Abstract:
An new method, which compresses the spectrum of the wideband / ultra -wideband LFM signal in radio channel to turn the wideband/ ultra -wideband signal into the narrowband signal, is presented in this paper. Using the inverse compression function, th...
An new method, which compresses the spectrum of the wideband / ultra -wideband LFM signal in radio channel to turn the wideband/ ultra -wideband signal into the narrowband signal, is presented in this paper. Using the inverse compression function, th...
2007, 29(1): 26-29.
doi: 10.3724/SP.J.1146.2005.00585
Abstract:
Sliding spotlight SAR is a novel mode of SAR imaging, which can improve azimuth resolution by controlling the speed of antenna footprint to increase coherent accumulation time. This paper analyzes the sliding-spotlight mode at the aspects of imaging ...
Sliding spotlight SAR is a novel mode of SAR imaging, which can improve azimuth resolution by controlling the speed of antenna footprint to increase coherent accumulation time. This paper analyzes the sliding-spotlight mode at the aspects of imaging ...
2007, 29(1): 30-34.
doi: 10.3724/SP.J.1146.2005.00635
Abstract:
A new method for unsupervised classification of terrain types using fully POLarimetric Synthetic Aperture Radar (POLSAR) data is proposed in this paper. The method is a combination of the unsupervised classification based on Cloudes H- decomposition ...
A new method for unsupervised classification of terrain types using fully POLarimetric Synthetic Aperture Radar (POLSAR) data is proposed in this paper. The method is a combination of the unsupervised classification based on Cloudes H- decomposition ...
2007, 29(1): 35-38.
doi: 10.3724/SP.J.1146.2005.00545
Abstract:
As for the RST transform in image registration, corresponding formula of box distance transform is dieduced. Compared with traditional formula of general affine Hausdorff box distance, search range of distance is reduced. The paper proposes regional ...
As for the RST transform in image registration, corresponding formula of box distance transform is dieduced. Compared with traditional formula of general affine Hausdorff box distance, search range of distance is reduced. The paper proposes regional ...
2007, 29(1): 39-42.
doi: 10.3724/SP.J.1146.2005.00485
Abstract:
It is extremely needed to conserve and restore old films. Intensity flicker is a common artifact in old black-and-white film sequences. Unfortunately, the existing algorithms removing intensity flicker do not consider the effect of local motion. To i...
It is extremely needed to conserve and restore old films. Intensity flicker is a common artifact in old black-and-white film sequences. Unfortunately, the existing algorithms removing intensity flicker do not consider the effect of local motion. To i...
2007, 29(1): 43-46.
doi: 10.3724/SP.J.1146.2005.00781
Abstract:
In this paper, a new method of image denoising is presented ,which is built upon the ideas of Embedded Zerotree Wavelet (EZW) encoder and separate character of signals and noises. This method is not only less than Tree-Adapted Wavelet Shrinkage (TAWS...
In this paper, a new method of image denoising is presented ,which is built upon the ideas of Embedded Zerotree Wavelet (EZW) encoder and separate character of signals and noises. This method is not only less than Tree-Adapted Wavelet Shrinkage (TAWS...
2007, 29(1): 47-49.
doi: 10.3724/SP.J.1146.2005.00438
Abstract:
In the research of super-resolution image processing, the precision and speed of the sub-pixel registration are the key factors. It is difficult for the Taylors series expansion method to do in real-time, and the hierarchical block-match method with ...
In the research of super-resolution image processing, the precision and speed of the sub-pixel registration are the key factors. It is difficult for the Taylors series expansion method to do in real-time, and the hierarchical block-match method with ...
2007, 29(1): 50-53.
doi: 10.3724/SP.J.1146.2005.00905
Abstract:
This paper proposes a novel spectrum-compressed digital receiving method using Laguerre transformation for LFM signal. Firstly, the frequency-warped characteristic of Laguerre transformation and its spectrum-compressed characteristic for LFM signal a...
This paper proposes a novel spectrum-compressed digital receiving method using Laguerre transformation for LFM signal. Firstly, the frequency-warped characteristic of Laguerre transformation and its spectrum-compressed characteristic for LFM signal a...
2007, 29(1): 54-58.
doi: 10.3724/SP.J.1146.2005.00468
Abstract:
Alpha stable distribution, a generalization of Gaussian, is better for modeling impulsive noises than Gaussian distribution in signal processing. This class of process has no close form of probability density function and finite second order moments....
Alpha stable distribution, a generalization of Gaussian, is better for modeling impulsive noises than Gaussian distribution in signal processing. This class of process has no close form of probability density function and finite second order moments....
2007, 29(1): 59-62.
doi: 10.3724/SP.J.1146.2005.00582
Abstract:
Epsilon machine is a new algorithm that tries to discover hidden patterns from data. Recently, the scholars in Santefe Institute have already applied it in symbol series successfully, but new problems emerge in traditional time series. A symbolizatio...
Epsilon machine is a new algorithm that tries to discover hidden patterns from data. Recently, the scholars in Santefe Institute have already applied it in symbol series successfully, but new problems emerge in traditional time series. A symbolizatio...
2007, 29(1): 63-66.
doi: 10.3724/SP.J.1146.2005.00569
Abstract:
Motion compensation is very important for high resolution SAS image. In this paper , the process of motion compensation based on inertial measuring system is discussed in detail, and then an improved point-by-point compensate image algorithm based on...
Motion compensation is very important for high resolution SAS image. In this paper , the process of motion compensation based on inertial measuring system is discussed in detail, and then an improved point-by-point compensate image algorithm based on...
2007, 29(1): 67-70.
doi: 10.3724/SP.J.1146.2005.00660
Abstract:
When using a microphone array for hands-free speech acquisition in enclosure environments, one can be faced with the problem of wave propagation in near-field. In this paper, therefore, a near-field beamforming method for microphone array based speec...
When using a microphone array for hands-free speech acquisition in enclosure environments, one can be faced with the problem of wave propagation in near-field. In this paper, therefore, a near-field beamforming method for microphone array based speec...
2007, 29(1): 71-75.
doi: 10.3724/SP.J.1146.2005.00452
Abstract:
The fundamental frequency contour (F0 contour) for utterance in rule-based speech synthesis system, is shaped by many functional unit in phonetics, not only the simple concatenation of F0 contour among the nearby syllables. In order to improve the na...
The fundamental frequency contour (F0 contour) for utterance in rule-based speech synthesis system, is shaped by many functional unit in phonetics, not only the simple concatenation of F0 contour among the nearby syllables. In order to improve the na...
2007, 29(1): 76-80.
doi: 10.3724/SP.J.1146.2005.00646
Abstract:
At present, most image watermarking schemes can not effectively resist geometrical attacks, which restricts the applications of digital watermarking techniques. RST (Rotation, Scaling, Translation) are frequently used geometrical attacks. In this pap...
At present, most image watermarking schemes can not effectively resist geometrical attacks, which restricts the applications of digital watermarking techniques. RST (Rotation, Scaling, Translation) are frequently used geometrical attacks. In this pap...
2007, 29(1): 81-86.
doi: 10.3724/SP.J.1146.2005.00515
Abstract:
Texture feature is one kind of important image features in multi-spectral images except with spectral characteristics. In this paper, the characteristics of orientation texture features are analyzed. And then the concept and method of integrated orie...
Texture feature is one kind of important image features in multi-spectral images except with spectral characteristics. In this paper, the characteristics of orientation texture features are analyzed. And then the concept and method of integrated orie...
2007, 29(1): 87-91.
doi: 10.3724/SP.J.1146.2005.00641
Abstract:
To avoid over segmentation produced by watershed segment algorithm, an image segment algorithm based on the adaptive preprocessing is proposed in this paper. This algorithm is based on the watershed transform. First the gradient image is preprocessed...
To avoid over segmentation produced by watershed segment algorithm, an image segment algorithm based on the adaptive preprocessing is proposed in this paper. This algorithm is based on the watershed transform. First the gradient image is preprocessed...
2007, 29(1): 92-95.
doi: 10.3724/SP.J.1146.2005.00492
Abstract:
In this paper, an adaptive particle filter for moving objects tracking is proposed. Mean shift is optimization algorithm based on gradient descended, which tracks moving targets through iterations. Particle filter is a robust method of tracking in no...
In this paper, an adaptive particle filter for moving objects tracking is proposed. Mean shift is optimization algorithm based on gradient descended, which tracks moving targets through iterations. Particle filter is a robust method of tracking in no...
2007, 29(1): 96-100.
doi: 10.3724/SP.J.1146.2005.00567
Abstract:
This paper presents a new method of estimating numbers and frequencies for sinusoid signals based on TransDimensional Simulated Annealing(TDSA) algorithm. This paper introduces penalty term and least square into TDSA, and gives a method that simultan...
This paper presents a new method of estimating numbers and frequencies for sinusoid signals based on TransDimensional Simulated Annealing(TDSA) algorithm. This paper introduces penalty term and least square into TDSA, and gives a method that simultan...
2007, 29(1): 101-104.
doi: 10.3724/SP.J.1146.2005.00597
Abstract:
Based on uniform linear array and 4th order cumulant of array output signals, a novel blind algorithm for spatial signature estimation was presented in this paper, and was applied to estimate spatial signature of multi-user with coherent multi-path. ...
Based on uniform linear array and 4th order cumulant of array output signals, a novel blind algorithm for spatial signature estimation was presented in this paper, and was applied to estimate spatial signature of multi-user with coherent multi-path. ...
2007, 29(1): 105-108.
doi: 10.3724/SP.J.1146.2005.00558
Abstract:
Theoretical investigations have proven that the system combining beamforming with space-time block coding can improve the performance efficiently, compared to the conventional single beamforming or space-time block coding only schemes. The convention...
Theoretical investigations have proven that the system combining beamforming with space-time block coding can improve the performance efficiently, compared to the conventional single beamforming or space-time block coding only schemes. The convention...
2007, 29(1): 109-112.
doi: 10.3724/SP.J.1146.2005.00529
Abstract:
In this paper, a DOA estimation algorithm for non-stationary signals embedded in impulsive SS noise environments is proposed. Firstly, a Spatial Ambiguity Function based on the Fractional Lower Order Statistics (FLOS-SAF) is defined to separate signa...
In this paper, a DOA estimation algorithm for non-stationary signals embedded in impulsive SS noise environments is proposed. Firstly, a Spatial Ambiguity Function based on the Fractional Lower Order Statistics (FLOS-SAF) is defined to separate signa...
2007, 29(1): 113-116.
doi: 10.3724/SP.J.1146.2005.00528
Abstract:
In Orthogonal Frequency-Division Multiplexing (OFDM) systems, how to estimate rapidly time-varying channels exactly is a challenge issue. In this paper, relying on a basis expansion channel model, a channel estimation scheme of rapidly time-varying c...
In Orthogonal Frequency-Division Multiplexing (OFDM) systems, how to estimate rapidly time-varying channels exactly is a challenge issue. In this paper, relying on a basis expansion channel model, a channel estimation scheme of rapidly time-varying c...
2007, 29(1): 117-120.
doi: 10.3724/SP.J.1146.2005.00439
Abstract:
MMSE estimator is a common channel estimator in coherent OFDM systems. Against mismatch problem of MMSE estimator, an improved MMSE channel estimator based on adaptive order determination is proposed. This algorithm estimates the maximum multipath de...
MMSE estimator is a common channel estimator in coherent OFDM systems. Against mismatch problem of MMSE estimator, an improved MMSE channel estimator based on adaptive order determination is proposed. This algorithm estimates the maximum multipath de...
2007, 29(1): 121-124.
doi: 10.3724/SP.J.1146.2005.00681
Abstract:
Artificial Fish School Algorithm (AFSA) is a new kind of intelligence optimization algorithm, which has some advantages that Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) do not have. But this algorithm has several disadvantages such a...
Artificial Fish School Algorithm (AFSA) is a new kind of intelligence optimization algorithm, which has some advantages that Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) do not have. But this algorithm has several disadvantages such a...
2007, 29(1): 125-128.
doi: 10.3724/SP.J.1146.2005.00602
Abstract:
An algorithm based on higher-order cyclic cumulants for the automatic classification of SQAM signals is proposed. The algorithm utilizes the cyclostationary property of communication signals and presents classification feature in cyclic cumulants dom...
An algorithm based on higher-order cyclic cumulants for the automatic classification of SQAM signals is proposed. The algorithm utilizes the cyclostationary property of communication signals and presents classification feature in cyclic cumulants dom...
2007, 29(1): 129-132.
doi: 10.3724/SP.J.1146.2005.00575
Abstract:
From the mathematical point of view, information sources can be 1-to-1 mapped to stochastic processes. Known from the theory of chaos, multi-fractal of stochastic process is a key characteristic of its dynamics, of which entropy rate is a special fra...
From the mathematical point of view, information sources can be 1-to-1 mapped to stochastic processes. Known from the theory of chaos, multi-fractal of stochastic process is a key characteristic of its dynamics, of which entropy rate is a special fra...
2007, 29(1): 133-137.
doi: 10.3724/SP.J.1146.2005.00470
Abstract:
The LMMSE channel estimation algorithms based on Pilot-Assisted is investigated for MIMO-OFDM systems，and the Low-Bound of MSE for LMMSE channel estimation is derived. A low rank channel estimator, at first, by using Singular Value Decomposition (SVD...
The LMMSE channel estimation algorithms based on Pilot-Assisted is investigated for MIMO-OFDM systems，and the Low-Bound of MSE for LMMSE channel estimation is derived. A low rank channel estimator, at first, by using Singular Value Decomposition (SVD...
2007, 29(1): 138-142.
doi: 10.3724/SP.J.1146.2005.00612
Abstract:
Providing Quality of Service (QoS) in wireless communication system is studied in this paper. First, the Round Robin (RR) scheduler and the joint KH/RR scheduler are analyzed by employing the ergodic capacity of fading channel. Then, a novel Partial ...
Providing Quality of Service (QoS) in wireless communication system is studied in this paper. First, the Round Robin (RR) scheduler and the joint KH/RR scheduler are analyzed by employing the ergodic capacity of fading channel. Then, a novel Partial ...
2007, 29(1): 143-147.
doi: 10.3724/SP.J.1146.2005.00571
Abstract:
BLAST can effectively increase information rate in multi-antenna system. The simplest space multiplex method is V-BLAST, which has simple detection algorithm such as ZF-DFE, MMSE-DFE, ML and ML-DFE etc. This paper discussed methods to improve the ML-...
BLAST can effectively increase information rate in multi-antenna system. The simplest space multiplex method is V-BLAST, which has simple detection algorithm such as ZF-DFE, MMSE-DFE, ML and ML-DFE etc. This paper discussed methods to improve the ML-...
2007, 29(1): 148-151.
doi: 10.3724/SP.J.1146.2005.00552
Abstract:
To handle co-antenna interference, intersymbol interference (ISI) and intercarrier interference (ICI) caused by insufficient cyclic prefix, a MMSE-based Turbo per-tone equalization is presented for MIMO OFDM systems in this paper. A Soft-Input Soft-O...
To handle co-antenna interference, intersymbol interference (ISI) and intercarrier interference (ICI) caused by insufficient cyclic prefix, a MMSE-based Turbo per-tone equalization is presented for MIMO OFDM systems in this paper. A Soft-Input Soft-O...
2007, 29(1): 152-156.
doi: 10.3724/SP.J.1146.2005.00280
Abstract:
A joint WLMS channel estimation and detection algorithm based Turbo iteration is proposed in this paper. Using the soft information provided by the soft mapping and demapping algorithms, the proposed algorithm achieve its information exchange between...
A joint WLMS channel estimation and detection algorithm based Turbo iteration is proposed in this paper. Using the soft information provided by the soft mapping and demapping algorithms, the proposed algorithm achieve its information exchange between...
2007, 29(1): 157-160.
doi: 10.3724/SP.J.1146.2005.00705
Abstract:
All the traditional channel estimation methods have the same default: they use too many pilots which decreases the frequency efficiency. The subject of this paper mainly focuses on the research of new algorithms and proposes the channel estimation pr...
All the traditional channel estimation methods have the same default: they use too many pilots which decreases the frequency efficiency. The subject of this paper mainly focuses on the research of new algorithms and proposes the channel estimation pr...
2007, 29(1): 161-165.
doi: 10.3724/SP.J.1146.2005.00549
Abstract:
A tool of intra prediction is introduced in the new video coding standard-H.264, which can cut down the spatial redundancy effectively. Though intra prediction can reduce the bit rate, it is undoubtedly computationally intensive. To overcome this dra...
A tool of intra prediction is introduced in the new video coding standard-H.264, which can cut down the spatial redundancy effectively. Though intra prediction can reduce the bit rate, it is undoubtedly computationally intensive. To overcome this dra...
2007, 29(1): 166-168.
doi: 10.3724/SP.J.1146.2005.00580
Abstract:
In a wide variety of broadband applications, there is a need to distribute information to a potentially large number of receiver sites that are widely dispersed from each other. Communication satellites are a natural technology option and are extreme...
In a wide variety of broadband applications, there is a need to distribute information to a potentially large number of receiver sites that are widely dispersed from each other. Communication satellites are a natural technology option and are extreme...
2007, 29(1): 169-173.
doi: 10.3724/SP.J.1146.2005.00513
Abstract:
Theorelical and mathematical analyses of multicarrier CDMA capacity planning are proposed and the expressions of capacity for multicarrier CDMA are derived both in uplink and downlink. Through extremum of a multivariate function (by Lagrange multipli...
Theorelical and mathematical analyses of multicarrier CDMA capacity planning are proposed and the expressions of capacity for multicarrier CDMA are derived both in uplink and downlink. Through extremum of a multivariate function (by Lagrange multipli...
2007, 29(1): 174-176.
doi: 10.3724/SP.J.1146.2005.00589
Abstract:
This paper researches low complexity detection scheme based on joint transmission scheme in multi-user MIMO downlink. Firstly, a model of multi-user MIMO downlink is introduced. A data transmission algorithm is got which can greatly reduce receivers ...
This paper researches low complexity detection scheme based on joint transmission scheme in multi-user MIMO downlink. Firstly, a model of multi-user MIMO downlink is introduced. A data transmission algorithm is got which can greatly reduce receivers ...
2007, 29(1): 177-181.
doi: 10.3724/SP.J.1146.2005.00748
Abstract:
High energy efficiency is one of the most important requirements for Wireless Sensor Network (WSN) design, and energy efficient routing is an important measure to achieve this goal. In this paper, a routing algorithm is proposed for WSN, GLB-DMECR, w...
High energy efficiency is one of the most important requirements for Wireless Sensor Network (WSN) design, and energy efficient routing is an important measure to achieve this goal. In this paper, a routing algorithm is proposed for WSN, GLB-DMECR, w...
2007, 29(1): 182-184.
doi: 10.3724/SP.J.1146.2005.00650
Abstract:
An attack is mounted on a group signature scheme based on Chinese Remainder Theory(Chen-Scheme). It shows the Chen-Scheme is insecure: A colluding subset of group members can find the private key of other members and forge their signatures; The disho...
An attack is mounted on a group signature scheme based on Chinese Remainder Theory(Chen-Scheme). It shows the Chen-Scheme is insecure: A colluding subset of group members can find the private key of other members and forge their signatures; The disho...
2007, 29(1): 185-188.
doi: 10.3724/SP.J.1146.2005.00656
Abstract:
LUC public-key cryptosystem is analyzed, two new public-key cryptosystems on Lucas sequence LUC-RSA, LUC-Rabin are presented, their security are stonger than LUC, RSA, and the rate of throughput of the data are greater than LUC.
LUC public-key cryptosystem is analyzed, two new public-key cryptosystems on Lucas sequence LUC-RSA, LUC-Rabin are presented, their security are stonger than LUC, RSA, and the rate of throughput of the data are greater than LUC.
2007, 29(1): 189-192.
doi: 10.3724/SP.J.1146.2005.00346
Abstract:
This paper designs a communion key distribution protocol based on asymmetric cipher system, and an authentication protocol based on symmetric cipher system for the requirement of digital mobile communication system. Then this protocol is analyzed by ...
This paper designs a communion key distribution protocol based on asymmetric cipher system, and an authentication protocol based on symmetric cipher system for the requirement of digital mobile communication system. Then this protocol is analyzed by ...
2007, 29(1): 193-196.
doi: 10.3724/SP.J.1146.2005.00486
Abstract:
This paper points out that the stream cipher model in construction and properties of balance feedforword sequences is a filter-combination model with generalized semi-Bent function as feedforward function, and analyses the stream cipher model simply.
This paper points out that the stream cipher model in construction and properties of balance feedforword sequences is a filter-combination model with generalized semi-Bent function as feedforward function, and analyses the stream cipher model simply.
2007, 29(1): 197-200.
doi: 10.3724/SP.J.1146.2005.00329
Abstract:
Hyper Bent functions achieve the maximal minimum distance to all the m sequences．In this paper, the relationship between the hyper Bent function on F22m and the Bent function on GF2m(2) is studied and two methods for constructing vectorial hyper Bent...
Hyper Bent functions achieve the maximal minimum distance to all the m sequences．In this paper, the relationship between the hyper Bent function on F22m and the Bent function on GF2m(2) is studied and two methods for constructing vectorial hyper Bent...
2007, 29(1): 201-204.
doi: 10.3724/SP.J.1146.2005.00574
Abstract:
The security of the two ring signature schemes proposed by Xu(2004) and Zhang(2004) is analyzed, and its found that both the ring signature schemes are susceptible to group-changing attack. In addition, Zhangs scheme can easily be attacked by multipl...
The security of the two ring signature schemes proposed by Xu(2004) and Zhang(2004) is analyzed, and its found that both the ring signature schemes are susceptible to group-changing attack. In addition, Zhangs scheme can easily be attacked by multipl...
2007, 29(1): 205-208.
doi: 10.3724/SP.J.1146.2005.00453
Abstract:
An extended layered graph of MPLS over WDM mesh networks is designed in this paper, which overcomes the shortcomings of original layered graph and involves the limited optical transceivers at routing nodes. Based on different QoS constraint, the prio...
An extended layered graph of MPLS over WDM mesh networks is designed in this paper, which overcomes the shortcomings of original layered graph and involves the limited optical transceivers at routing nodes. Based on different QoS constraint, the prio...
2007, 29(1): 209-213.
doi: 10.3724/SP.J.1146.2005.00642
Abstract:
Robust multimedia transmission over heterogeneous wireless networks is challenging. A protocol architecture that considers cross layer interaction is required. In this paper, an adaptive cross layer unequal protection strategy is proposed for video t...
Robust multimedia transmission over heterogeneous wireless networks is challenging. A protocol architecture that considers cross layer interaction is required. In this paper, an adaptive cross layer unequal protection strategy is proposed for video t...
2007, 29(1): 214-217.
doi: 10.3724/SP.J.1146.2005.00947
Abstract:
Quality of Service (QoS) and Traffic Engineering (TE) capabilities are two important techniques in todays networks for supporting real-time applications. Multi Protocol Label Switching (MPLS) plays an important part in IP networks for providing QoS a...
Quality of Service (QoS) and Traffic Engineering (TE) capabilities are two important techniques in todays networks for supporting real-time applications. Multi Protocol Label Switching (MPLS) plays an important part in IP networks for providing QoS a...
2007, 29(1): 218-222.
doi: 10.3724/SP.J.1146.2005.00546
Abstract:
For lack of bandwidth allocation algorithm or proposal in IEEE802.16 wireless metropolitan area network standard, in this paper a unite model based on logarithm utility function derived from 802.16 service flows bandwidth allocation is present. Then ...
For lack of bandwidth allocation algorithm or proposal in IEEE802.16 wireless metropolitan area network standard, in this paper a unite model based on logarithm utility function derived from 802.16 service flows bandwidth allocation is present. Then ...
2007, 29(1): 223-226.
doi: 10.3724/SP.J.1146.2005.01313
Abstract:
Memory Cell is a basic and important macro block of SRAM. It has played a positive role in improving performance and reliability, lowering cost and power consumption. In this paper a new physical alpha-power law MOSEFT model is used to establish powe...
Memory Cell is a basic and important macro block of SRAM. It has played a positive role in improving performance and reliability, lowering cost and power consumption. In this paper a new physical alpha-power law MOSEFT model is used to establish powe...
2007, 29(1): 227-231.
doi: 10.3724/SP.J.1146.2005.00089
Abstract:
Method for realizing time-domain Continuous Wavelet Transform (CWT) using Switched-current (SI) technology is firstly presented in this paper. It is shown a new way for fast implementation of CWT based on amplitude modulation techniques for generatin...
Method for realizing time-domain Continuous Wavelet Transform (CWT) using Switched-current (SI) technology is firstly presented in this paper. It is shown a new way for fast implementation of CWT based on amplitude modulation techniques for generatin...
2007, 29(1): 232-235.
doi: 10.3724/SP.J.1146.2005.00889
Abstract:
For monitoring system which fixed on rotating component, the energy supply is a difficult problem for a long time. A non-contact energy transmission technology based on microstrip antennas is put forward to replace the traditional methods such as sli...
For monitoring system which fixed on rotating component, the energy supply is a difficult problem for a long time. A non-contact energy transmission technology based on microstrip antennas is put forward to replace the traditional methods such as sli...
2007, 29(1): 243-245.
doi: 10.3724/SP.J.1146.2005.00623
Abstract:
The paper presents the n-th order current mode filter circuit with multiple inputs and one output based on MCCCII (second generation Current Controlled Conveyor with Multiple outputs). The filter circuit which contains n active elements and n capacit...
The paper presents the n-th order current mode filter circuit with multiple inputs and one output based on MCCCII (second generation Current Controlled Conveyor with Multiple outputs). The filter circuit which contains n active elements and n capacit...
2007, 29(1): 236-242.
doi: 10.3724/SP.J.1146.2005.00233
Abstract:
Wavelet filtering is a new research in the field of signal processing in the last decade. It has predominance over the traditional filtering methods. This paper presents the principle, model and characteristics of wavelet denoising method, basing on ...
Wavelet filtering is a new research in the field of signal processing in the last decade. It has predominance over the traditional filtering methods. This paper presents the principle, model and characteristics of wavelet denoising method, basing on ...
