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2011 Vol. 33, No. 11
Display Method:
2011, 33(11): 2541-2546.
doi: 10.3724/SP.J.1146.2011.00218
Abstract:
Since compressing depth map using existing video coding techniques yields unacceptable distortions while rendering virtual views, the depth maps need to be compressed in a way that it minimizes distortions in the rendered views. A distortion model is...
Since compressing depth map using existing video coding techniques yields unacceptable distortions while rendering virtual views, the depth maps need to be compressed in a way that it minimizes distortions in the rendered views. A distortion model is...
2011, 33(11): 2547-2552.
doi: 10.3724/SP.J.1146.2011.00126
Abstract:
A serious problem in ordinary vector quantization is edge degradation, it can not accurately preserve the edge information. To tackle this problem, a novel classified vector quantization based on Reversible integer Time Domain Lapped Transform (RTDLT...
A serious problem in ordinary vector quantization is edge degradation, it can not accurately preserve the edge information. To tackle this problem, a novel classified vector quantization based on Reversible integer Time Domain Lapped Transform (RTDLT...
An Iterative Side Information Refinement Method Based on MHMCP Denoising in Distributed Video Coding
2011, 33(11): 2553-2558.
doi: 10.3724/SP.J.1146.2011.00355
Abstract:
In the Distributed Video Coding (DVC), the quality of Side Information (SI) has a critical impact on the coding efficiency and Rate-Distortion (RD) performance. Improving SI quality by extracting motion information from decoded frames becomes a new h...
In the Distributed Video Coding (DVC), the quality of Side Information (SI) has a critical impact on the coding efficiency and Rate-Distortion (RD) performance. Improving SI quality by extracting motion information from decoded frames becomes a new h...
2011, 33(11): 2559-2563.
doi: 10.3724/SP.J.1146.2011.00172
Abstract:
Pilot Symbol Assisted Modulation (PSAM) is widely used in the digital burst transmission system. The frequency estimation of a Pre+Post pilot structure departs from its CramrRao Lower Bound (CRLB) when frequency error is large and SNR is low. In this...
Pilot Symbol Assisted Modulation (PSAM) is widely used in the digital burst transmission system. The frequency estimation of a Pre+Post pilot structure departs from its CramrRao Lower Bound (CRLB) when frequency error is large and SNR is low. In this...
2011, 33(11): 2564-2568.
doi: 10.3724/SP.J.1146.2011.00389
Abstract:
The performances analysis of a multiuser Amplify-and-Forward (AF) cooperative communication networks is presented based on the outdated Channel State Information (CSI). The system architecture is point-to-multipoint and the user selection is based on...
The performances analysis of a multiuser Amplify-and-Forward (AF) cooperative communication networks is presented based on the outdated Channel State Information (CSI). The system architecture is point-to-multipoint and the user selection is based on...
2011, 33(11): 2569-2574.
doi: 10.3724/SP.J.1146.2011.00247
Abstract:
Femtocells are a promising solution to enhance indoor coverage and system capacity. Hybrid access methods reach a compromise between the performance of subscribers and non-subscribers. In this paper, a Weighted Proportional Fair (WPF) algorithm is pr...
Femtocells are a promising solution to enhance indoor coverage and system capacity. Hybrid access methods reach a compromise between the performance of subscribers and non-subscribers. In this paper, a Weighted Proportional Fair (WPF) algorithm is pr...
2011, 33(11): 2575-2581.
doi: 10.3724/SP.J.1146.2011.00101
Abstract:
To reduce packet collision probability, Binary Exponential Backoff (BEB) algorithm is presented in IEEE 802.11 standard. The BEB, however, exhibits the shortcoming that Contention Window (CW) oscillation occurs when packet collision probability is la...
To reduce packet collision probability, Binary Exponential Backoff (BEB) algorithm is presented in IEEE 802.11 standard. The BEB, however, exhibits the shortcoming that Contention Window (CW) oscillation occurs when packet collision probability is la...
2011, 33(11): 2582-2587.
doi: 10.3724/SP.J.1146.2011.00309
Abstract:
An Ultra Wide Band (UWB) communication system with Dechirp and complex polyphase filter bank is proposed. The transmitted signal uses On-Off Keying (OOK) modulation and Chirp spread spectrum. The received signal goes through the Dechirp pulse compres...
An Ultra Wide Band (UWB) communication system with Dechirp and complex polyphase filter bank is proposed. The transmitted signal uses On-Off Keying (OOK) modulation and Chirp spread spectrum. The received signal goes through the Dechirp pulse compres...
2011, 33(11): 2588-2593.
doi: 10.3724/SP.J.1146.2011.00090
Abstract:
Multiplied by constant on modulo 2n operation, a building block, is widely used in the ciphers like Sosemanuk, RC6, MARS, and so on. This code link is recognized as a permutation with strong nonlinear property and fine realization efficiency, when th...
Multiplied by constant on modulo 2n operation, a building block, is widely used in the ciphers like Sosemanuk, RC6, MARS, and so on. This code link is recognized as a permutation with strong nonlinear property and fine realization efficiency, when th...
2011, 33(11): 2594-2599.
doi: 10.3724/SP.J.1146.2011.00112
Abstract:
A new scheme of joint channel coding and Physical layer Network Coding (PNC) is proposed for multiple-access channel based on Trellis Coded Modulation (TCM) in the Multiple Access Control (MAC) stage of the investigated two-way relay scenario. As a r...
A new scheme of joint channel coding and Physical layer Network Coding (PNC) is proposed for multiple-access channel based on Trellis Coded Modulation (TCM) in the Multiple Access Control (MAC) stage of the investigated two-way relay scenario. As a r...
2011, 33(11): 2600-2604.
doi: 10.3724/SP.J.1146.2010.01395
Abstract:
A power-interference pricing model is presented using pricing scheme based on utility optimization. Then, a distributed jointly channel assignment and power allocation algorithm is proposed for multi-channel wireless mesh networks. Each node adjusts ...
A power-interference pricing model is presented using pricing scheme based on utility optimization. Then, a distributed jointly channel assignment and power allocation algorithm is proposed for multi-channel wireless mesh networks. Each node adjusts ...
2011, 33(11): 2605-2609.
doi: 10.3724/SP.J.1146.2011.00191
Abstract:
3-Dimensional Mobile Ad hoc NETwork (3-D MANET) is a case of mobile Ad hoc network which is distributed on the 3-Dimensional space. Analysis of link dynamics is a fundamental issue in the studies of 3-D MANET, the conclusion of which can be the basis...
3-Dimensional Mobile Ad hoc NETwork (3-D MANET) is a case of mobile Ad hoc network which is distributed on the 3-Dimensional space. Analysis of link dynamics is a fundamental issue in the studies of 3-D MANET, the conclusion of which can be the basis...
2011, 33(11): 2610-2615.
doi: 10.3724/SP.J.1146.2011.00323
Abstract:
In order to approach the theoretical limit of decode-and-forward strategy for the half-duplex relay channel, a cooperative LDPC coding structure and its corresponding optimization scheme is proposed. Different from the structure of Bilayer-Expurgated...
In order to approach the theoretical limit of decode-and-forward strategy for the half-duplex relay channel, a cooperative LDPC coding structure and its corresponding optimization scheme is proposed. Different from the structure of Bilayer-Expurgated...
2011, 33(11): 2616-2621.
doi: 10.3724/SP.J.1146.2011.00324
Abstract:
Belief Propagation (BP) decoding algorithm of Repeat Accumulate (RA) code approaches Shannon limit, but it possesses high complexity because of the use of the complex hyperbolic tangent function and the inverse hyperbolic tangent function at check no...
Belief Propagation (BP) decoding algorithm of Repeat Accumulate (RA) code approaches Shannon limit, but it possesses high complexity because of the use of the complex hyperbolic tangent function and the inverse hyperbolic tangent function at check no...
2011, 33(11): 2622-2627.
doi: 10.3724/SP.J.1146.2011.00322
Abstract:
To overcome the drawback of the high complexity of Log Likelihood Ratio (LLR) generation and its accompanying sorting in Extended Min-Sum (EMS) decoding of non-binary Low-Density Parity-Check (LDPC) codes, for non-binary LDPC-coded BPSK modulation sy...
To overcome the drawback of the high complexity of Log Likelihood Ratio (LLR) generation and its accompanying sorting in Extended Min-Sum (EMS) decoding of non-binary Low-Density Parity-Check (LDPC) codes, for non-binary LDPC-coded BPSK modulation sy...
2011, 33(11): 2628-2633.
doi: 10.3724/SP.J.1146.2011.00303
Abstract:
An accurate and efficient Dynamic Framed-Slotted ALOHA (DFSA) anti-collision algorithm is proposed based on unequal timeslots in Radio Frequency IDentification (RFID) system. Considering the influence of idle and collided timeslots on RFID system eff...
An accurate and efficient Dynamic Framed-Slotted ALOHA (DFSA) anti-collision algorithm is proposed based on unequal timeslots in Radio Frequency IDentification (RFID) system. Considering the influence of idle and collided timeslots on RFID system eff...
2011, 33(11): 2634-2639.
doi: 10.3724/SP.J.1146.2011.00221
Abstract:
Non-Local Means (NLM) filter is an effective method for image denoising. However, it only focuses on the geometry structure of image, ignoring the appearance model and directional information. In this paper, a new Non-Subsampled Shearlet Descriptor (...
Non-Local Means (NLM) filter is an effective method for image denoising. However, it only focuses on the geometry structure of image, ignoring the appearance model and directional information. In this paper, a new Non-Subsampled Shearlet Descriptor (...
2011, 33(11): 2640-2646.
doi: 10.3724/SP.J.1146.2011.00151
Abstract:
In order to improve recovery accuracy of the greedy algorithms, Bayesian hypothesis Testing Match Pursuit (BTMP) algorithm is proposed. Firstly, this algorithm presents a Bayesian hypothesis testing model which is used to identify the indexes of nonz...
In order to improve recovery accuracy of the greedy algorithms, Bayesian hypothesis Testing Match Pursuit (BTMP) algorithm is proposed. Firstly, this algorithm presents a Bayesian hypothesis testing model which is used to identify the indexes of nonz...
2011, 33(11): 2647-2651.
doi: 10.3724/SP.J.1146.2011.00338
Abstract:
According to the high precision demand of estimating TOA in Galileo Search And Rescue (SAR) system, and considering the uncertainty of message bit width and the asymmetry degree of modulation in actual COSPAS-SARSAT signal, a new TOA estimation algor...
According to the high precision demand of estimating TOA in Galileo Search And Rescue (SAR) system, and considering the uncertainty of message bit width and the asymmetry degree of modulation in actual COSPAS-SARSAT signal, a new TOA estimation algor...
2011, 33(11): 2652-2657.
doi: 10.3724/SP.J.1146.2010.01333
Abstract:
In many acoustic signal processing systems (e.g. hearing aids), directional algorithm is adopted to process signals from separated sources. However, reverberation in a living room or a conference room usually degrades noise reduction of a directional...
In many acoustic signal processing systems (e.g. hearing aids), directional algorithm is adopted to process signals from separated sources. However, reverberation in a living room or a conference room usually degrades noise reduction of a directional...
2011, 33(11): 2658-2664.
doi: 10.3724/SP.J.1146.2011.00208
Abstract:
This paper presents a method for 3D human pose estimation using shape and motion information from multiple synchronized video streams. It separates the whole human body into head, torso and limbs. The state of each part in current frame is predicted ...
This paper presents a method for 3D human pose estimation using shape and motion information from multiple synchronized video streams. It separates the whole human body into head, torso and limbs. The state of each part in current frame is predicted ...
2011, 33(11): 2665-2671.
doi: 10.3724/SP.J.1146.2011.00045
Abstract:
The exterior Computed Tomography (CT) reconstruction majors in reconstructing the cross section image of pipe wall in reality. Subset Average-Total Variation Minimization-Projection Onto Convex Sets (SA-TVM-POCS) numerical reconstruction algorithm is...
The exterior Computed Tomography (CT) reconstruction majors in reconstructing the cross section image of pipe wall in reality. Subset Average-Total Variation Minimization-Projection Onto Convex Sets (SA-TVM-POCS) numerical reconstruction algorithm is...
2011, 33(11): 2672-2678.
doi: 10.3724/SP.J.1146.2010.01426
Abstract:
A novel learning-based image inpainting method is presented. As a further development of classical sparse representation model, the non-local self-similar patches are unified for joint sparse representation and learning dictionary, in which each elem...
A novel learning-based image inpainting method is presented. As a further development of classical sparse representation model, the non-local self-similar patches are unified for joint sparse representation and learning dictionary, in which each elem...
2011, 33(11): 2679-2685.
doi: 10.3724/SP.J.1146.2011.00113
Abstract:
Terrain Observation by Progressive scans SAR (TOPSAR) is a novel spaceborne imaging mode with wide swath coverage. Imaging algorithms for such mode are required to resolve three existing problems: Doppler spectrum aliasing, large range cell migration...
Terrain Observation by Progressive scans SAR (TOPSAR) is a novel spaceborne imaging mode with wide swath coverage. Imaging algorithms for such mode are required to resolve three existing problems: Doppler spectrum aliasing, large range cell migration...
2011, 33(11): 2686-2693.
doi: 10.3724/SP.J.1146.2011.00289
Abstract:
Because of the long integration time of Geosynchronous Earth Orbit Synthetic Aperture Radar (GEO SAR), the imaging algorithms based on linear trajectory module is not suit for GEO SAR, the imaging algorithms based on linear trajectory module may indu...
Because of the long integration time of Geosynchronous Earth Orbit Synthetic Aperture Radar (GEO SAR), the imaging algorithms based on linear trajectory module is not suit for GEO SAR, the imaging algorithms based on linear trajectory module may indu...
2011, 33(11): 2694-2701.
doi: 10.3724/SP.J.1146.2011.00148
Abstract:
The high accurate Digital Elevation Model (DEM) generated by InSAR (Interferometric Synthetic Aperture Radar) relies on the interferometric calibration. However, the requirement of sufficient Ground Control Points (GCPs) is time consuming and impract...
The high accurate Digital Elevation Model (DEM) generated by InSAR (Interferometric Synthetic Aperture Radar) relies on the interferometric calibration. However, the requirement of sufficient Ground Control Points (GCPs) is time consuming and impract...
2011, 33(11): 2702-2708.
doi: 10.3724/SP.J.1146.2011.00281
Abstract:
For deficiencies of existing design methods of orthogonal coded signals such as notably computational complexity, limited coding length and limited signal number, a kind of random discrete frequency coding signal based on chaotic series is proposed i...
For deficiencies of existing design methods of orthogonal coded signals such as notably computational complexity, limited coding length and limited signal number, a kind of random discrete frequency coding signal based on chaotic series is proposed i...
2011, 33(11): 2709-2713.
doi: 10.3724/SP.J.1146.2011.00111
Abstract:
The channel mismatch error between separate radar instruments is one of the challenges in the single pass Interferometric SAR (InSAR) system. A channel amplitude and phase mismatch error model is introduced. The correlation coefficient with the chann...
The channel mismatch error between separate radar instruments is one of the challenges in the single pass Interferometric SAR (InSAR) system. A channel amplitude and phase mismatch error model is introduced. The correlation coefficient with the chann...
2011, 33(11): 2714-2719.
doi: 10.3724/SP.J.1146.2011.00271
Abstract:
Based on the cross-correlation of the received data of Ground Penetrating Radar (GPR), a novel Back Projection (BP) algorithm is proposed to suppress the artifacts in the results of GPR imaging. Comparing with standard BP algorithm, the proposed Cros...
Based on the cross-correlation of the received data of Ground Penetrating Radar (GPR), a novel Back Projection (BP) algorithm is proposed to suppress the artifacts in the results of GPR imaging. Comparing with standard BP algorithm, the proposed Cros...
2011, 33(11): 2720-2726.
doi: 10.3724/SP.J.1146.2011.00252
Abstract:
Sparse representation of signals is of great significance in many applications. In this paper, sparse representation for chirp echoes in broadband radar on an orthogonal dictionary is proposed. The stretch processing of broadband radar is reformulate...
Sparse representation of signals is of great significance in many applications. In this paper, sparse representation for chirp echoes in broadband radar on an orthogonal dictionary is proposed. The stretch processing of broadband radar is reformulate...
2011, 33(11): 2727-2734.
doi: 10.3724/SP.J.1146.2011.00213
Abstract:
The bistatic scattering centres are usually modeled as the monostatic scattering centres, however, the fact that the location of the scattering centre changes with the bistatic configuration is ignored. This paper focuses on the bistatic scattering c...
The bistatic scattering centres are usually modeled as the monostatic scattering centres, however, the fact that the location of the scattering centre changes with the bistatic configuration is ignored. This paper focuses on the bistatic scattering c...
2011, 33(11): 2735-2741.
doi: 10.3724/SP.J.1146.2011.00261
Abstract:
The radar signal sorting method based on traditional clustering algorithm takes on a high time complexity and has poor accuracy. Considering the issue, a new sorting method is researched based on Cone Cluster Labeling (CCL) method for Support Vector ...
The radar signal sorting method based on traditional clustering algorithm takes on a high time complexity and has poor accuracy. Considering the issue, a new sorting method is researched based on Cone Cluster Labeling (CCL) method for Support Vector ...
2011, 33(11): 2742-2747.
doi: 10.3724/SP.J.1146.2011.00491
Abstract:
Remote sensing images are most likely affected by both blur and noise, which makes the quality of them are difficult to obtain for they can not come down to one certain distortion type. Based on the natural scene statistical feature of natural image,...
Remote sensing images are most likely affected by both blur and noise, which makes the quality of them are difficult to obtain for they can not come down to one certain distortion type. Based on the natural scene statistical feature of natural image,...
2011, 33(11): 2748-2752.
doi: 10.3724/SP.J.1146.2011.00397
Abstract:
A more accurate moment method solution for longitudinal slot in a rectangular waveguide is presented, taking into account both distribution of the transverse electrical filed across the slot aperture and the finite wall thickness. Resonant length of ...
A more accurate moment method solution for longitudinal slot in a rectangular waveguide is presented, taking into account both distribution of the transverse electrical filed across the slot aperture and the finite wall thickness. Resonant length of ...
2011, 33(11): 2753-2758.
doi: 10.3724/SP.J.1146.2011.00137
Abstract:
Recent studies on soft errors focus on the low-cost fault tolerant techniques, thus motivating an early and accurate evaluation of microprocessor reliability (i.e., Architectural Vulnerability Factor (AVF)). However, current AVF evaluation tools have...
Recent studies on soft errors focus on the low-cost fault tolerant techniques, thus motivating an early and accurate evaluation of microprocessor reliability (i.e., Architectural Vulnerability Factor (AVF)). However, current AVF evaluation tools have...
2011, 33(11): 2759-2763.
doi: 10.3724/SP.J.1146.2011.00284
Abstract:
The routers on chip, which adopt packet-connection circuit switching, establish the links by sending a request packet and transfer data by circuit switching. Conventional routing algorithms are not suitable for the new features of Network on Chip (No...
The routers on chip, which adopt packet-connection circuit switching, establish the links by sending a request packet and transfer data by circuit switching. Conventional routing algorithms are not suitable for the new features of Network on Chip (No...
2011, 33(11): 2764-2770.
doi: 10.3724/SP.J.1146.2011.00480
Abstract:
A high performance and low power fix-point Special Function Unit (SFU) for mobile vertex processors is presented in this paper. The system supports the fix-point format for OpenGL ES 1.X and implements 16 bit precision after the decimal point and fai...
A high performance and low power fix-point Special Function Unit (SFU) for mobile vertex processors is presented in this paper. The system supports the fix-point format for OpenGL ES 1.X and implements 16 bit precision after the decimal point and fai...
2011, 33(11): 2771-2774.
doi: 10.3724/SP.J.1146.2010.01285
Abstract:
A novel and high-performance electric field microsensor is presented based on Silicon-On-Insulator (SOI) fabrication technology. In order to improve the sensitivity and SNR (Signal to Noise Ratio) of the sensor, the unique design of the shutter cover...
A novel and high-performance electric field microsensor is presented based on Silicon-On-Insulator (SOI) fabrication technology. In order to improve the sensitivity and SNR (Signal to Noise Ratio) of the sensor, the unique design of the shutter cover...
2011, 33(11): 2775-2779.
doi: 10.3724/SP.J.1146.2011.00337
Abstract:
The system calibration is very important for the Ultra Wide Band-Virtual Aperture Radar (UWB-VAR) which could penetrate ground to detect the flush buried targets with weak scattering. The usual system calibration method used in narrow band radar with...
The system calibration is very important for the Ultra Wide Band-Virtual Aperture Radar (UWB-VAR) which could penetrate ground to detect the flush buried targets with weak scattering. The usual system calibration method used in narrow band radar with...
2011, 33(11): 2780-2784.
doi: 10.3724/SP.J.1146.2011.00196
Abstract:
A modeling and optimization method for electromechanical coupling of cavity filters is proposed to improve the electrical performance and yield rate of assembled filters. In the method, a coupling model that can reveal the effect of manufacturing pre...
A modeling and optimization method for electromechanical coupling of cavity filters is proposed to improve the electrical performance and yield rate of assembled filters. In the method, a coupling model that can reveal the effect of manufacturing pre...
2011, 33(11): 2785-2789.
doi: 10.3724/SP.J.1146.2011.00384
Abstract:
Towards the problem of personalized services recommendation in mobile telecommunication network, a collaborative filtering algorithm based on context similarity for mobile users is proposed by incorporating mobile users context information into colla...
Towards the problem of personalized services recommendation in mobile telecommunication network, a collaborative filtering algorithm based on context similarity for mobile users is proposed by incorporating mobile users context information into colla...
2011, 33(11): 2790-2794.
doi: 10.3724/SP.J.1146.2011.00398
Abstract:
The Fast Dipole Method (FDM) is used for the fast calculation of electromagnetic scattering from composite metallic and material targets, which is based on the Equivalent Dipole-moment Method (EDM). In the FDM, a simple Taylor's series expansion and ...
The Fast Dipole Method (FDM) is used for the fast calculation of electromagnetic scattering from composite metallic and material targets, which is based on the Equivalent Dipole-moment Method (EDM). In the FDM, a simple Taylor's series expansion and ...
