Abstract：To support frequency selective scheduling in uplink, Long Term Evolution (LTE) system defines the Sounding Reference Signal (SRS) for channel quality estimation. This paper focuses on the Signal-to-Noise Ratio (SNR) estimation of the SRS. In order to deal with the shortcomings of Boumard’s method and the traditional DFT method, an improved estimation method based on DFT is proposed. This method reduces the energy leakage’s influence of useful signal on high SNR by correcting the noise estimated interval in time domain, thus more accurate SNR estimation can be obtained. Simulation results show that the estimated performance of the proposed method is better than Boumard’s method and traditional DFT method, and the average performance achieves an improvement of over 6 dB in high SNR area.
岳光荣, 田浩, 杨霖, 李少谦, 胡武君. LTE中一种基于探测参考信号的信噪比估计算法[J]. 电子与信息学报, 2014, 36(1): 241-245.
Yue Guang-Rong, Tian Hao, Yang Lin, Li Shao-Qian, Hu Wu-Jun. SNR Estimation Algorithm Based on Sounding Reference Signal in LTE. , 2014, 36(1): 241-245.
2014, Vol. 36 
