Channel Estimation with New Basis Expansion Model for Wireless Communications on High Speed Railways

2016 ◽  
Author(s):  
Xiyu Wang ◽  
Gongpu Wang ◽  
Jingyuan Sun ◽  
Yulong Zou
Keyword(s):  
Wireless Communications ◽  
Channel Estimation ◽  
High Speed ◽  
Basis Expansion ◽  
Basis Expansion Model ◽  
Expansion Model

An Improved Channel Estimation Method in OFDM System

2013 ◽  
Vol 347-350 ◽  
pp. 1646-1652
Author(s):  
Shun Xian Li
Keyword(s):  
Channel Estimation ◽  
Orthogonal Frequency Division Multiplexing ◽  
Fourier Coefficients ◽  
Estimation Method ◽  
Ofdm Systems ◽  
Basis Expansion ◽  
Basis Expansion Model ◽  
Inverse Reconstruction ◽  
Expansion Model ◽  
Symbol Duration

In this paper, we will focus on channel estimation (CE) in orthogonal frequency-division multiplexing (OFDM) systems. The time-varying (TV) channelsare modeled by a basis expansion model (BEM). Due to the time-variation, the channel matrix in the frequency domain is no longer diagonal, but approximately banded.We use a pilot-aided algorithm for estimation of rapidly varying wireless channels in OFDM systems. Theperforms is goodwhen the channels vary on the scale of a single OFDM symbol duration, which occurs in mobile communication scenarios such as WiMAX, WAVE, and DVB-T.We recover Fourier coefficients of the channel taps by the pilot information.We then estimate the BEM coefficients of the channel taps from their respective Fourier coefficients using a recently developed inverse reconstruction method.We compare some BEM models in inverse methodsto find out the best ones in certain conditions.

scholarly journals High mobility channel estimation method based on improved basis expansion model

2019 ◽  
Vol 5 (2) ◽  
pp. 76-83
Author(s):  
Jinjin Huang ◽  
Yisheng Zhao ◽  
Zhixiang Dong ◽  
Mengjia Chen ◽  
Zhonghui Chen
Keyword(s):  
Channel Estimation ◽  
Estimation Method ◽  
High Mobility ◽  
Basis Expansion ◽  
Basis Expansion Model ◽  
High Mobility Channel ◽  
Expansion Model
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