### Incomplete sub-brand-new method of mean in LTE system

ZHOU Qian1, JING Xiaorong1，2, ZHANG Zufan1，2, CHEN Qianbin1，2

1. 1.School of Communications and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2.Chongqing Key Laboratory of Mobile Communication（CQUPT）, Chongqing 400065, China
• Online:2013-06-01 Published:2013-06-14

### LTE系统中基于分簇的改进有限反馈新算法

1. 1.重庆邮电大学 通信与信息工程学院，重庆 400065
2.移动通信技术重庆市重点实验室，重庆 400065

Abstract: A limited-feedback new algorithm with low amount of feedback for LTE systems based on channel information mean is proposed. The frequency response coherence among the subcarriers is exploited to uniformly divide the overall subcarriers of the OFDM systems into several sub-carrier clusters, and the sub-carriers in each cluster are further equally divided into several subgroups except the cluster head. Then the corresponding optimal precoding matrix is searched according to the channel information mean of each subgroup. Numerical simulations show the proposed scheme can not only ensure the system performance, but also significantly reduce the feedback overhead.