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Non-uniform clustering routing protocol of wheat farmland based on effective energy consumption

International Journal of Agricultural and Biological Engineering 2021年第3期14卷 163-170页

作者： Yisheng Miao Chunjiang Zhao Huarui Wu College of Computer Science Beijing University of TechnologyBeijing 100124China National Engineering Research Center for Information Technology in Agriculture Beijing 100097China Beijing Research Center for Information Technology in Agriculture Beijing Academy of Agriculture and Forestry SciencesBeijing100097China

Wireless sensor network(WSN)can achieve real-time data collection and transmission of environment,soil,meteorology,crop physiology and other information in *** data provided by WSN could be used for decision making and management,which is very important in precision *** farmland wireless sensor network has the characteristics of wide coverage area,long planting period,inconvenient energy supply,and serious impact of crop environment on wireless signal *** protocol is an important method to achieve long-term WSN monitoring by selecting an appropriate path with low energy consumption for data *** to the phenomenon of uneven environment and channel parameters caused by intensive crop growth in farmland,a non-uniform clustering routing protocol based on effective energy consumption(UCEEC)was proposed in this *** method combined with the characteristics of multi-path fading of farmland environment *** idea of image segmentation was *** with high similarity were divided into a cluster area by the dissimilarity between nodes in order to improve the intracluster communication ***,a multi-hop path selection method between cluster-heads based on the estimation of two-hop effective energy consumption is *** energy consumption cost factor is calculated by the effective energy consumption and the average energy consumption within the cluster to achieve the minimum and balance of the overall energy consumption of the *** results show that,compared with the existing Maximum Residual Energy Based Routing(MREBR)protocol,minimum Energy Consumption Based Routing(MEC)routing protocols,UCEEC improves the energy balance effect between nodes,prolongs the network life cycle,and realizes efficient energy utilization of wireless sensor network data collection in the complex environment of wheat field.

关键词： farmland wireless sensor networks multi-path fading channel routing protocol energy optimization

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A novel symbol synchronization algorithm for OFDM systems under low SNR

A novel symbol synchronization algorithm for OFDM systems un...

引用

2006北京地区高校研究生学术交流会

作者： Gao Yan Zhou Xiong-di Wang Yan

An improved symbol synchronization algorithm for OFDM systems is proposed in this paper. The proposed method computes the correlation between the received symbols and the recovered transmitted symbols which are obtained by a secondary modulation after the coarse synchronization. This data-aided method reduces the influence of low SNR. Simulation results demonstrate that the proposed algorithm has good timing synchronization performance over multi-path fading channel

关键词： OFDM symbol synchronization cyclic-prefix multi-path fading channel

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