电讯技术
電訊技術
전신기술
TELECOMMUNICATIONS ENGINEERING
2015年
1期
7-12
,共6页
多输入多输出%协作通信%空间调制%分集性能
多輸入多輸齣%協作通信%空間調製%分集性能
다수입다수출%협작통신%공간조제%분집성능
multiple-input multiple-output%cooperative communication%spatial modulation%diversity performance
针对空间调制( SM)技术存在的缺欠,提出了具有天线选择和中继选择的空间调制系统方案。首先在多输入多输出( MIMO)信道模型下,通过对发送端天线选择,将拥有最佳信道状态的天线选出进行SM,打破SM技术对发送端天线数的限制,并提升采用高阶调制的SM分集性能。然后进一步将此思想引入协作通信网络,结合传感器网络的分级观念,提出采用中继选择和空间调制的中继传输协议,并通过仿真观察系统分集性能的改善。仿真结果表明,上述中继传输协议不仅能提升系统性能,而且使系统配置更加灵活。
針對空間調製( SM)技術存在的缺欠,提齣瞭具有天線選擇和中繼選擇的空間調製繫統方案。首先在多輸入多輸齣( MIMO)信道模型下,通過對髮送耑天線選擇,將擁有最佳信道狀態的天線選齣進行SM,打破SM技術對髮送耑天線數的限製,併提升採用高階調製的SM分集性能。然後進一步將此思想引入協作通信網絡,結閤傳感器網絡的分級觀唸,提齣採用中繼選擇和空間調製的中繼傳輸協議,併通過倣真觀察繫統分集性能的改善。倣真結果錶明,上述中繼傳輸協議不僅能提升繫統性能,而且使繫統配置更加靈活。
침대공간조제( SM)기술존재적결흠,제출료구유천선선택화중계선택적공간조제계통방안。수선재다수입다수출( MIMO)신도모형하,통과대발송단천선선택,장옹유최가신도상태적천선선출진행SM,타파SM기술대발송단천선수적한제,병제승채용고계조제적SM분집성능。연후진일보장차사상인입협작통신망락,결합전감기망락적분급관념,제출채용중계선택화공간조제적중계전수협의,병통과방진관찰계통분집성능적개선。방진결과표명,상술중계전수협의불부능제승계통성능,이차사계통배치경가령활。
To overcome the inherence disadvantage of spatial modulation( SM) technique,two SM schemes with antenna and relay selections are investigated. Firstly,under the channel model of multiple-input multi-ple-output(MIMO),through the antenna selection at the transmitter,the selected antenna with the best channel state can be used in SM. This SM scheme breaks the limitation on the number of transmit anten-nas,and obtains improvement of diversity performance for a system employing high order of modulation. Then the idea is further introduced in cooperative communication networks. Integrating the classification i-dea of sensor networks,a relay transmission scheme which employs SM and relay selection is presented,and the improvement of diversity performance is observed by simulation. Simulation results confirm that the sys-tem performance is improved and the system configuration is more flexible with the transmission scheme.
