A channel estimation method of reference signal based on 5g-v2x

Abstract

Based on 5G-V2X (Vehicle to Everything) is one of the key research areas in wireless communication. Channel estimation is the key to physical layer communication. In V2X communication, there are Doppler frequency shifts, fast time-varying fading, and multipath. To be able to support transmission requirements with low latency and high reliability, this paper combines 3GPP standards to perform channel estimation for V2X terminals. The MMSE algorithm is used to estimate the channel at the DMRS to address the Doppler shift and fast time-varying fading of the V2X channel, and the two-dimensional interpolation algorithm is used to accurately estimate the V2X channel by iterative calculation of the delay expansion. The simulation results show that the overall performance of the algorithm in this paper is suitable for V2X engineering, the accuracy of the algorithm is high and the complexity is low.