中文摘要：

针对发端能量受限的无线传感器网络提出了一种基于OSTBC的高效虚拟MIMO协作传输策略。在无线传感器网络的每个簇内采用一种全速率的分布式OSTBC传输方案,同时对调制方式的星座大小进行优化,创建了一种更高效的无线传感器网络和MIMO通信相结合的模型。针对该模型在接收端进行迭代译码,并推导出该系统的总能耗函数和网络时延算式。通过仿真显示,该模型不仅能够极大的降低发端能耗,对任意协作节点数目均能够实现全速率传输,解决了传统分布式空时码用于无线传感器网络时发端的数据积压问题,减小了网络时延。因此本协作传输模型从能量消耗和网络时延两方面对无线传感网的性能进行了提升,能够为无线传感网的应用提供有意义的参考。

英文摘要：

An efficient virtual MIMO（Multiple Input Multiple Output） cooperative transmission strategy based on OSTBC（Orthogonal Space Time Codes） for wireless sensor networks is proposed in this paper.The full-rate distributed OSTBC encoded cooperative transmission is adopted in the inner-cluster,in the meanwhile we optimize the constellation size and propose a more efficient cooperative transmission model combining WSN and MIMO systems.In the receiver,we apply an iterative decoding algorithm,and deduce an energy consumption function and the total delay equation.Simulations show that with the proposed strategy,the goal of full rate transmission can be achieved for any arbitrary number of cooperative nodes,and both the total energy consumption and the total delay on the transmission side can be greatly reduced.So our efficient virtual MIMO cooperative transimission model improve the wireless sensor network performance in both energy consumption and time delay,and our research can provide a meaningful reference for application of WSN.