结合STBC或VBLAST的WSN协作传输的性能对比分析  

Performance Comparison Analysis of WSN Cooperative Transmission Combined with STBC or VBLAST

作　　者：许振月 杨磊 周雯[1] XU Zhenyue;YANG Lei;ZHOU Wen(College of Information Science and Technology,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]南京林业大学信息科学技术学院,江苏南京210037

出　　处：《无线电工程》2020年第12期1042-1049,共8页Radio Engineering

基　　金：国家自然科学基金资助项目(61601275)。

摘　　要：研究了结合多输入多输出(MIMO)的典型技术——垂直分层空时码(VBLAST)的无线传感网络(WSN)协作传输系统,详细描述了其中的协作机制,得到了非协作与协作传输时单位比特的能耗比,给出了传输能耗以及吞吐量的表达式。对比了结合另一MIMO经典技术——空时分组码(STBC)的WSN协作传输的系统性能,包括网络生存周期和吞吐量。仿真结果表明,STBC协作传输在延长网络生存周期方面的性能优于VBLAST协作传输,后者的网络吞吐量远高于前者,分析得到了各自的优缺点和适用范围。A Wireless Sensor Network(WSN)cooperative transmission system based on Vertical Bell Labs Layered Space-time(VBLAST)code,which is a typical Multiple-Input and Multiple-Output(MIMO)technology,is studied.The cooperative mechanism is described in detail.The energy consumption ratio per unit bit of non-cooperative and cooperative transmission is obtained,and the expressions of transmission energy consumption and throughput are given.The performance of WSN collaborative transmission system,including network life cycle and throughput,is also compared in combination with the Space-Time Block Code(STBC)which is another MIMO classic technique.Simulation results show that STBC cooperative transmission is better than VBLAST cooperative transmission in prolonging the network life cycle,and the network throughput of the latter is much higher than that of the former,and their own advantages and disadvantages and applicable range are obtained through the analysis.

关 键 词：无线传感器网络 协作传输 空时分组码 垂直分层空时码 能耗 吞吐量 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]