摘要
LTE-A上行参考信号主要包括DMRS(解调参考信号)和SRS(探测参考信号),DMRS信号主要用于上行信道估计以及eNode B端的相干检测和解调,以便接收端成功解调数据。信道估计的准确性对于LTE-A系统的性能是至关重要的,而在信道估计算法(MMSE)中,噪声估计的准确性将直接影响到信道估计的性能。因此,为了更加准确地进行信道估计,对噪声估计的研究是非常有必要的。
LTE- A System supports two types of uplink reference signals that are DMRS （Demodulation Reference Signal） and SRS （ Sounding Reference Signal）. DMRS is mainly used for uplink channel estimation, coherent detection of eNode - B side and de- modulation in order to estimate accurately received signals. The accuracy of channel estimation to the performance of LTE - A system is crucial, and the noise estimate will affect directly the accuracy of channel estimation performance in the channel estimation algorithm （MMSE）. Therefore, in order to improve the accuracy of channel estimation performance, the research of noise estimation is very nec- essary.
出处
《山西电子技术》
2013年第6期83-85,共3页
Shanxi Electronic Technology
