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Efficient Rate Control Algorithm for Multi-view Video Coding

China communications 2011年第3期8卷 83-89页

作者：刘峰熊婕范晶晶林琼洁 Image Processing & Image Communication Key Lab of Jiangsu Province Nanjing University of Posts and Telecommunications Key Lab of Broadband Wireless Communication and Sensor Network Technology(Nanjing University of Posts and Telecommunications) Ministry of Education

Rate control is one of the key factors influencing the multi-view video ***,there is not a rate control algorithm in the existing Joint Multi-view Video Coding *** this paper,an efficient rate control algorithm and a bit allocation strategy for multi-view video coding are *** order to obtain the consistent view quality,a bit allocation model based on the Lagrange optimum algorithm is firstly ***,considering the encoding statistical characteristics of different view types,a view weighting factor is introduced,and it will help improve the precision of bit allocation among *** with the fixed QP control strategy,experiment results show that the proposed algorithm can efficiently control the bit rate and obtain more consistent views,with video visual quality improved.

关键词： rate control rate distortion bit allocation view weighting factor

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An energy-efficient Distributed Compressed Sensing architecture for wireless sensor networks based on a distributed wavelet compression algorithm

An energy-efficient Distributed Compressed Sensing architect...

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2011 International Conference on wireless communications and Signal Processing, WCSP 2011

作者： Hu, Hai-Feng Yang, Zhen Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 China National Mobile Communications Research Laboratory Southeast University China

ISBN: (纸本)9781457710100

wireless sensor networks (WSN) are mainly characterized by a potentially large number of distributed sensor nodes which collectively transmit information about sensed events to the sink. In this paper, we present a centralized generating algorithm running at the sink to obtain the distributed wavelet basis in WSN. And on this basis, Wavelet Transform-based Distributed Compressed Sensing (WTDCS) algorithm is proposed to compress and reconstruct sensor observations with spatial correlations. Finally, the analysis of relationship between reconstruction error and energy consumption in WTDCS is carried out by simulation. The results show that WTDCS can achieve high performance in terms of energy and reconstruction accuracy, as compared to conventional distributed wavelet transform algorithm. © 2011 IEEE.

关键词： Wavelet transforms

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An expanding ring prediction and location aided AODV routing algorithm

An expanding ring prediction and location aided AODV routing...

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2011 International Conference on Information technology, Computer Engineering and Management Sciences, ICM 2011

作者： Cheng, Chunling Hao, Jingbo Zhang, Dengyin College of Computer Nanjing University of Posts and Telecommunications Nanjing Jiangsu 210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing Jiangsu 210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Jiangsu Province Nanjing Jiangsu 210003 China

ISBN: (纸本)9780769545226

On the battlefield, the cooperative fighting and communication among combat vehicles require higher service level of real-time transmission. Combat vehicles' fast moving and the links' frequent disruption lead to the increase of packet loss rate, packet delay and routing control overhead ratio. This paper proposes an expanding ring prediction and location aided AODV routing algorithm. It improves AODV routing protocol from both routing discovery and maintenance phases. In the rouing discovery phase, the algorithm limits the scope of sending RREQ through predicting the topology ring;and during the route maintenance phase, it predicts the motion range of destination node with the information provided by GPS to avoid blindness routing. The simulation results show that the proposed routing algorithm can greatly cut down the overload of combat vehicular network, improve the routing delay and reduce packet loss rate. It can meet the real-time requirements of the service transmission among combat vehicles and also improve the performance of the combat vehicular network. © 2011 IEEE.

关键词： Forecasting

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A novel neural network optimized by quantum genetic algorithm for signal detection in MIMO-OFDM systems

A novel neural network optimized by quantum genetic algorith...

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IEEE Symposium on Computational Intelligence in Control and Automation

作者： Li, Fei Zhou, Min Li, Haibo Institute of Signal Processing and Transmission Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing China Department of Applied Physics and Electronics Umeå University Umeå Sweden

ISBN: (纸本)9781424499038

Neural networks can easily fall into a local extremum and have slow convergence rate. Quantum Genetic Algorithm (QGA) has features of small population size and fast convergence. Based on the investigation of QGA, we propose a novel neural network model, Radial Basis Function (RBF) networks optimized by Quantum Genetic Algorithm (QGA-RBF model). Then we investigate the performance of the proposed QGA-RBF on solving MIMO-OFDM signal detection problem. A novel signal detector based on QGA-RBF for MIMO-OFDM system is also proposed. The simulation results show that the proposed detector has more powerful properties in bit error rate than QGA based detector, RBF based detector and MMSE algorithm based detector, namely a 4-6 dB gain in performance can be achieved. The performance of the proposed detector is closer to optimal, compared with the other detectors. © 2011 IEEE.

关键词： Orthogonal frequency division multiplexing

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A noval data collection approach for Wirelsee sensor networks

A noval data collection approach for Wirelsee Sensor Network...

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2nd Annual Conference on Electrical and Control Engineering, ICECE 2011

作者： Wang, Haiyong Yang, Geng Xu, Jian Chen, Zhengyu Chen, Lei Yang, Zhen College of Internet of Things Nanjing University of Posts and Telecommunications Nanjing 210003 Jiangsu China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Post and Telecommunications Nanjing 210003 China

ISBN: (纸本)9781424481637

The unmanned nature of wireless sensor networks make them very vulnerable to the malicious attacks. Therefore, how to complete secure data collection under different conditions is the crucial issue to wireless sensor networks. There have been a few on-going research efforts about multipath routing for secure data collection. In this paper, we make full use of the broadcast message when wireless sensor network initializes to construct secure multipath routing for secure data collection which will cause little overhead to the sensor nodes in the network. In accordance with the simulation results, the algorithm in this paper compares with other recent researches is better. © 2011 IEEE.

关键词： sensor nodes

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Performance analysis of data aggregation algorithms in wireless sensor networks

Performance analysis of data aggregation algorithms in wirel...

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2nd Annual Conference on Electrical and Control Engineering, ICECE 2011

作者： Xu, Jian Yang, Geng Chen, Zheng-Yu Chen, Lei Yang, Zhen College of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 Jiangsu China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 Jiangsu China

ISBN: (纸本)9781424481637

Resource-constrained is a critical issue in wireless sensor networks (WSN) applications. Data aggregation (or data fusion) is one of the key techniques to solve the problem. Data aggregation can effectively reduce the data traffic, thereby reduce energy consumption, and extend the network's survival time. The research of data aggregation relates to many aspects of technology, so that the design of efficient data aggregation algorithm is a challenging task. In this paper, we investigate the effect of essential operations, scheduling algorithm and aggregation tree construction, has on data aggregation performance. The main performance such as end-to-end delay and energy-consumption of different aggregation schemes has been studied and measured by simulation experiment. © 2011 IEEE.

关键词： Scheduling algorithms

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Single-channel speech separation based on NLMSE quasi-KLT bases

Single-channel speech separation based on NLMSE quasi-KLT ba...

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2011 International Conference on wireless communications and Signal Processing, WCSP 2011

作者： Guo, Haiyan Yang, Zhen Zhu, Weiping College of Engineering Nanjing Agricultural University Nanjing Jiangsu 210031 China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing Jiangsu 210003 China

ISBN: (纸本)9781457710100

In this paper, we propose a new single-channel speech separation algorithm by l0 optimization using nonhomogeneous linear mean square estimation (NLMSE) quasi-KLT basis. First, we propose to construct NLMSE quasi-KLT bases from the single-channel mixture by diagonalizing the approximate autocorrelation matrices of speech sources, which are constructed by a linear combination of generated templates. Second, based on the NLMSE quasi-KLT bases, single-channel speech separation is performed by l0 optimization. Finally, simulation results demonstrating the effective performance of single-channel separation of two speech sources using the NLMSE quasi-KLT bases are presented. © 2011 IEEE.

关键词： Mathematical transformations

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AN IMPROVED EPON UPSTREAM TRANSMISSION SCHEME WITH ZERO INTER-PERIOD IDLE LOSS

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Journal of Electronics(China) 2011年第4期28卷 664-669页

作者： Shen Jianhua Guo Hongmei Mi Zhengkun Key Lab of Broadband Wireless Communication and Sensor Network Technology （ NUPT） Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 China

Existing Ethernet Passive Optical network(EPON) Dynamic Bandwidth Allocation(DBA) algorithms suffer from the disadvantage of idle time loss,which lower the upstream bandwidth *** letter proposes an improved upstream transmission scheme with idle-time eliminating *** analysis and numerical calculation prove that the improved scheme can ef-fectively eliminate the idle time and enhance the efficiency of upstream link *** results have shown that the bandwidth utilization can be raised up to 15% in heavy-load scenarios while the time delay performance of Assured Forwarding(AF) and Best Effort(BE) services are improved simultaneously.

关键词： Ethernet Passive Optical network(EPON) Dynamic Bandwidth Allocation(DBA) algorithm Channel transmission scheme Idle time eliminating

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Distributed precoding for multicell-MISO downlink CoMP

Distributed precoding for multicell-MISO downlink CoMP

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2011 IEEE 13th International Conference on communication technology, ICCT 2011

作者： Zhang, Xiaona Yang, Long-Xiang Ding, Meiling Wu, Zhihua Jangsu Key Lab. of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Lab. of Broadband Wireless Communications and Sensor Network Technology Ministry of Education Nanjing 210003 China ZTE Corporation Nanjing 210003 China

ISBN: (纸本)9781612843070

Coordinated multi-point transmission/reception (CoMP), in which base stations cooperation during the downlink, has been considered as a attractive way of achieving higher performance and mitigating interference, especially for terminals at cell edges. In this paper, distributed precoding for multicell-MISO downlink CoMP is considered. Most previous work in the area is on the assumption that base stations have knowledge of both data symbols and full channel state information (CSI), which leads to heavy exchange of channel state information and signal information over backhaul links. In this paper, several distributed precoding strategies (Distributed MRT, distributed ZF, distributed LVSINR and DVSINR) for multicell-MISO downlink CoMP are analyzed, which supposes that each base station only has local CSI and the precoders can be devised at each BS in a distributed manner, and Monte Carlo simulations demonstrate the performance of such strategies. © 2011 IEEE.

关键词： Channel state information

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Multiuser MIMO user selection schemes using block diagonalization

Multiuser MIMO user selection schemes using block diagonaliz...

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2011 International Conference on Computer, communication, Control and Automation, 3CA 2011

作者： Chunfang, Zhang Long-Xiang, Yang Meiling, Ding Zhihua, Wu Jiangsu Key Lab. of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Lab. of Broadband Wireless Communications and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing 210003 China ZTE Corporation China

ISBN: (纸本)9783642255403

Block diagonalization (BD) is a classical and practical interference cancelation precoding algorithm in MU-MIMO system. But once BD is used, the user number can be supported simultaneously by the base station is limited by the ratio of the numbers of transmit and receive antennas. In this paper, some existed lower complexity user selected schemes are discussed. These schemes are all based on capacity as the performance measure. However, there is an inherent drawback in these algorithms. Since the BS always selected the same users based on capacity or the correlation of the users in each time slot, it may not guarantee the quality-of-service of a single user. In order to ensure fairness in some systems, we improve the existed algorithms and propose the round-robin user selection algorithms. © 2011 Springer-Verlag.

关键词： MIMO systems

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