摘要
长期演进系统的下行链路采用正交频分多址接入技术,可以达到最高的频谱效率,而上行链路则采用具有较低峰均比的单载波频分多址接入技术。在对比2种不同接入技术基本模型的基础上,重点对单载波频分多址接入技术中的交织式、集中式和分布式的时域信号进行分析,同时对三者的不同峰均比分布进行仿真验证。仿真结果表明,交织式的峰均比是三者中最低的,在一般情况下,集中式比分布式具有更低的峰均比。
In the LTE system,for the downlink,the OFDMA is the most appropriate access mode in order to achieve the highest spectrum efficiency. For the uplink,the SC-FDMA access mode is used due to its low PAPR properties compared to OFDMA. Based on the comparison of basic model of two different access modes,this paper puts emphases on analyzing the time domain signal of SC-FDMA,including IFDMA,LFDMA and DFDMA,and then the simulation of the distribution of PAPR are given. The results show that the IFDMA has the lowest PAPR,but in most case,LFDMA has lower PAPR than DFDMA.
出处
《无线电工程》
2013年第11期26-28,39,共4页
Radio Engineering
