LTE-A系统中基于RS的信号均衡的SINR估计算法

SINR estimate algorithm based on RS signal equalization in LTE-A system

为了提高先进的长期演进(LTE-advanced,LTE-A)移动通信系统的传输效率,研究了提高子带的信干噪比(signal interference ratio,SINR)估计精度的问题,提出了一种利用参考信号(reference signal,RS)的信号均衡估计SINR的算法,该算法通过本地RS和均衡后的RS的方差计算SINR,与直接利用最小二乘法(least square,LS)计算参考信号接收功率(reference signal received power,RSRP)和干扰噪声(noise)得到SINR的传统算法相比,在增加有限复杂度情况下,SINR的估计精度有明显提高,特别是在终端处于高速移动、多普勒效应比较明显的信道环境下,SINR估算性能提升更加明显,从而提高系统的传输效率。

In this paper, we study the problem of estimation precision of single sub-band signal interference noise ratio （SINR） in LTE-advanced（LTE-A） mobile communication system, and propose a new SINR estimation algorithm, which is based on reference signal （RS） equalization, it computes the SINR through the mean square deviation of local RS and equalized RS. Experiment results show that, compared with the traditional estimation algorithm by computing reference signal received power （RSRP） and noise parameters using least square（ LS）, the SINR estimation precision of the proposed algorithm is improved remarkably with adding limited complexity, especially in high speed moving scene, it is beneficial to improve the efficiency of LTE-A system transferring.