摘要
LTE-A是LTE技术的平滑演进,引入了多载波聚合、中继、协作多点传输等关键技术。其中,多载波聚合是在频域上进行扩展,以满足LTE-A对高带宽的需求;中继技术能带来更广的覆盖范围和更高的系统容量,同时也面临干扰复杂化问题;协作多点传输技术能提高小区边缘的吞吐量;多天线技术通过增加上下行天线端口的数量,来提高峰值速率和频谱效率。
LTE-A is the smooth evolution of LTE.It has introduced key technology such as Carrier Aggregation、Relay、Coordinated multiple point etc.Carrier Aggregation is carried out in frequency domain extensions to meet high bandwidth demand for LTE-A;relay technology,on one hand,can bring about broader coverage and higher system capacity,but on the other hand is faced with the problem of complicated interference;coordinated multi point transmission technology can improve throughput of the cell edge;multiple antenna technology can improve the peak rate and spectrum efficiency by increasing the antenna port number.
出处
《数字通信》
2012年第1期59-61,65,共4页
Digital Communications and Networks
