首页 | 本学科首页   官方微博 | 高级检索  
     

放大转发协作中继是否提升OFDM/OFDMA遍历容量?(英)
引用本文:皇甫伟,张中山,张丹丹,隆克平.放大转发协作中继是否提升OFDM/OFDMA遍历容量?(英)[J].中国通信学报,2014(2).
作者姓名:皇甫伟  张中山  张丹丹  隆克平
基金项目:supported by the 863 project No.2014AA01A701;the National Natural Science Foundation of China(under Grants No.61172050);Program for New Century Excellent Talents in University(NECT-12-0774);; the open research fund of National Mobile Communications Research Laboratory Southeast University(No.2013D12);the Research Foundation of China Mobile;the Foundation of Beijing Engineering and Technology Center for Convergence Networks and Ubiquitous Services
摘    要:The ergodic information rate for Orthogonal Frequency-Division Multiplexing/ Orthogonal Frequency-Division Multiple Access with amplify-and-forward(AF)relaying systems in the presence of frequency offsets is evaluated.Unlike previous work,per-subcarrier adaptive power allocation is performed on each relay to optimize the system ergodic information rate.For a given frequency offset and total number of relays M,the AF ergodic information rate is proven to be a monotonically increasing function of a(the ratio of the power allocated to the source node and the total transmit power),implying that the maximum ergodic information rate can be obtained at α=1(i.e.,there is no cooperative relay).Furthermore,the proof of "cooperative relays cannot improve the AF ergodic information rate in a quasi-static wireless channel" is also provided in this letter.

本文献已被 CNKI 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号