摘要
在LTE-A上行系统中,人们采用单载波频分多址接入(SC-FDMA)方案。SC-FDMA是一种具有与正交频分复用(OFDM)系统相似复杂度,立方度量(CM)低的单载波调制和频域均衡技术。首先介绍了LTE-A上行多输入输出(MIMO)系统架构,在此基础上研究资源块、调制方式和多天线空频编码(SFBC)对上行系统CM的影响。仿真结果证明,天线越多,其对系统CM影响越大,4天线发送系统中空频编码技术对系统CM值的影响占主体。
Single carrier frequency division multiple access（SC-FDMA） is used in the uplink of long term evolution（LTE）. It utilizes single carrier modulation and frequency domain equalization, and has similar performance and essentially the same overall complexity as those of OFDM. An outstanding advantage of SC-FDMA is its lower CM due to its single carrier structure. In this paper, we discuss the Cubic Metric of SC-FDMA, which has three modulation modes and different SFBC technologies. The CM is sensitive to the SFBC technology according to the simulation results.
出处
《现代电信科技》
2013年第10期27-30,共4页
Modern Science & Technology of Telecommunications
