This paper considers the stabilization problem for Markovian jump systems with time delays. Both the probability rate matrix and the state feedback control law are to be designed. A sufficient condition is established...
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There are more and more pervasive applications of Wireless Multicast Network, such as the video conference, the voice transmission and the software updates etc. The traditional wireless multicast routing method is to ...
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ISBN:
(纸本)9781479947249
There are more and more pervasive applications of Wireless Multicast Network, such as the video conference, the voice transmission and the software updates etc. The traditional wireless multicast routing method is to construct a multicast tree,which may ignore many available links. This paper presents Markov Decision Process Based Multicast Opportunistic Routing Model. Whether each node of the whole network has received a packet stands for different states of a Markov chains. That is to say that Markov state transition is a routing process. This paper provides a new approach for the study of wireless multicast networks routing. In the reward function of the model, the consumption of Request and ACK among the nodes is abundantly considered. In accordance with each state of the network, the network chooses the optimal forwarding nodes which make the reward function of the model maximum. The experiment and the simulation results proves MDP is most effective routing scheme,and meets with the network system's requirement.
Named Data networking(NDN) has emerged as a new communication paradigm designed for efficient dissemination of data. However, mobility issues are not considered sufficiently. Consumer or producer mobility can incur re...
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ISBN:
(纸本)9781479947249
Named Data networking(NDN) has emerged as a new communication paradigm designed for efficient dissemination of data. However, mobility issues are not considered sufficiently. Consumer or producer mobility can incur request staleness issue, the loss of Interest and Data packets and communication delay. Through analysis, we consider how to forward the buffered data from old access point(AP) to new one and how to keep routing consistency during handoff stage are two key points to address mobility issue in NDN. To minimize the loss of Interest and Data,handoff delay during moving, we design a mobility support architecture(MobiNDN), which is a centralized system architecture and consists of initialization and three stages:registration,deletion and updating. We design three mobility scenarios and schemes and evaluate the performance of MobiNDN by comparing it against exiting NDN using extensive ndnSIM simulation. Our simulation results clearly show that MobiNDN architecture effectively decreases handoff delay and receives data packets during/after handoffs comparing with the exiting NDN.
This paper designs multi-step probabilistic sets for linear, discrete-time, stochastic systems with unbounded multiplicative noise and probabilistic constraints. Multi-step probabilistic sets strengthen IWPp by bringi...
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This paper is concerned with stochastic model predictive control for Markovian jump linear systems with additive disturbance, where the systems are subject to soft constraints on the system state and the disturbance s...
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As an extension of the Interferometric Synthetic aperture radar (InSAR), the multi-frequency InSAR can realize high-accuracy elevation extraction of the steep terrain. Though the maximum likelihood estimation (MLE) is...
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ISBN:
(纸本)9781510822023
As an extension of the Interferometric Synthetic aperture radar (InSAR), the multi-frequency InSAR can realize high-accuracy elevation extraction of the steep terrain. Though the maximum likelihood estimation (MLE) is widely used in the signal processing of multi-frequency InSAR, the performance of this method can be influenced by the selection of frequency combination. At the beginning, this paper analyses the elevation estimated effectiveness of different frequency combinations from the aspect of Cramer-Rao Lower Bound (CRLB). Then, it calculates the ambiguity cycle as a further filter for the optimal frequency combination. Finally, this paper discusses the adaptability to the phase noise with the help of Monte Carlo simulation strategy. In consideration of these three aspects, a selection method of frequency combination is proposed, and further simulation results are provided in quantity. Relevant researches can be used in the design of multi-frequency InSAR system.
In this paper, a two-degree-of-freedom (TDOF) control scheme for multi-input/multi-output (MIMO) systems with multiple time delays is proposed. First, a novel inversing decoupler design method based on the ideal decou...
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In this paper, a two-degree-of-freedom (TDOF) control scheme for multi-input/multi-output (MIMO) systems with multiple time delays is proposed. First, a novel inversing decoupler design method based on the ideal decoupling is proposed for decoupling the MIMO system with multiple time delays into several same independent single-input/single output (SISO) systems. Then the H2 proportion-integral-derivative (PID) controller based on the internal model control (IMC) is applied to the obtained SISO systems. Finally, the second controller is developed according to the decoupled closed-loop transfer function. Since the decoupled SISO systems are the same, only one PID controller should be designed for the independent SISO systems. The proposed method can simplify the design task significantly. Moreover, because the TDOF control structure can isolate the disturbance from the reference, the controller of the reference loop can be used to improve the reference response independently. Simulations are provided to illustrate the effectiveness of the proposed design approach.
With the continuous improvement of Synthetic Aperture Radar(SAR) resolution, interpreting the small targets like aircraft in SAR images becomes possible and turn out to be a hot spot in SAR application research. Howev...
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With the continuous improvement of Synthetic Aperture Radar(SAR) resolution, interpreting the small targets like aircraft in SAR images becomes possible and turn out to be a hot spot in SAR application research. However, due to the complexity of SAR imaging mechanism, interpreting targets in SAR images is a tough problem. This paper presents a new aircraft interpretation method based on the joint time-frequency analysis and multi-dimensional contrasting of basic structures. Moreover, SAR data acquisition experiment is designed for interpreting the aircraft. Analyzing the experiment data with our method, the result shows that the proposed method largely makes use of the SAR data information. The reasonable results can provide some auxiliary support for the SAR images manual interpretation.
This paper presents a novel curve image feature description using cubic Bezier curve, which extends the depth-independent image Jacobian matrix to curve features. We derive the image Jacobian matrix that can be linear...
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ISBN:
(纸本)9781479973989
This paper presents a novel curve image feature description using cubic Bezier curve, which extends the depth-independent image Jacobian matrix to curve features. We derive the image Jacobian matrix that can be linearly parameterized by the unknown curve feature geometrical parameters in the 3-D space. To estimate the unknown parameters online, we propose an adaptive algorithm using the defined curve image features. The control law is designed and the asymptotic stability is analyzed by the Lyapunov theory. There is no need to known the curve parameters or do correspondence matching while visual servoing. Experiment has been conducted to demonstrate the performance of the proposed controller with the curve features.
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