SNR estimation based on sounding reference signal in LTE uplink

In this paper, a novel SNR estimation algorithm based on the sounding reference signal (SRS) is proposed. By redefining the noise estimation range and time-domain windowing operation to the channel estimation vector, the influence of signal leakage is effectively reduced which makes the noise estimation is more accurate. Simulation results show that the proposed estimator performs both well in the integer sampling channel and non-integer sampling channel, and the performance is better than Boumard's algorithm and the original IFFT based algorithm, especially in high SNR regions.