Research of 2-D interpolation in OFDM pilot-assisted channel estimation
Chen Kui, Xu Zhao · Computer Engineering and Applications Journal · 2009
The Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation and/or transmission scheme. Higher bandwidth utilization rate and more resistant to channel multi-path disturbance make it become one of high-data-rate wireless communication technologies.This paper investigates the OFDM system channel estimation techniques based on 2-D inter-polation firstly.Then the performance of different 2-D interpolation,such as 2-D linear,spline,cubic-spline and 2-D transform do-main interpolation are compared.An improved 2-D transform domain interpolation is proposed to improve 2-D transform domain interpolation under different pilot models.A SimulinkTM model is built to simulate the system's BER and results show that the proposed method has good performance under Rayleigh channels.