Time-Domain Channel Estimation for the LTE-V System Over High-Speed Mobile Channels

EasyChair Preprint 184

Abstract

Developed from the LTE uplink, the LTE-V2X standard, widely used as LTE-V, increases the overhead of pilot symbols in order to acquire channel information robustly. In this paper, we propose to estimate time-varying pieces of channel rays for pilot symbols based on the basis expansion model (BEM), and subsequently to reconstruct time-domain channel response for data symbols by utilizing Slepian sequences based piece-wise interpolation (SS-PWI). To demonstrate the precision of channel estimation (CE), the Cramer Rao lower bound (CRLB) is derived. The simulations are implemented on the LTE-V platform, on which we consider the extended vehicular A model (EVA) channel with 2800 Hz maximum Doppler shift. The proposed time-domain CE schemes are well capable of tracking the channel state information (CSI), and the mean squared error (MSE) of CE nearly reaches the theoretically derived CRLB.

Keyphrases: Long term evolution–vehicular to everything (LTE-V2X), Orthogonal Frequency Division Multiple Access(OFDMA), Single carrier frequency division multiple access(SC-FDMA), Slepian sequences, channel estimation

@booklet{EasyChair:184,
  author    = {Qu Huiyang and Liu Guanghui and Wang Yanyan and Wen Shan and Chen Qiang},
  title     = {Time-Domain Channel Estimation for the LTE-V System Over High-Speed Mobile Channels},
  doi       = {10.29007/9xg6},
  howpublished = {EasyChair Preprint 184},
  year      = {EasyChair, 2018}}