Title :
Channel Estimation for OFDMA Uplink: a Hybrid of Linear and BEM Interpolation Approach
Author :
Ma, Yi ; Tafazolli, Rahim
Author_Institution :
Center for Commun. Syst. Res., Surrey Univ.
fDate :
4/1/2007 12:00:00 AM
Abstract :
We consider the channel estimation for the subband orthogonal frequency-division multiple-access (OFDMA) uplink. The channel for each subband is modeled by combing the linear and Fourier basis-expansion functions. Based on this mode, a two-dimensional interpolation approach is proposed for the channel estimation, which is carefully investigated in terms of estimation error and pilot placement
Keywords :
Fourier analysis; channel estimation; frequency division multiple access; interpolation; radio links; BEM interpolation approach; Fourier basis-expansion functions; OFDMA uplink; channel estimation; subband orthogonal frequency-division multiple-access; two-dimensional interpolation; Channel estimation; Discrete Fourier transforms; Doppler shift; Estimation error; Frequency estimation; Interpolation; Iterative methods; OFDM; Polynomials; Time frequency analysis; Channel estimation; Doppler shifts; interpolation; orthogonal frequency-division multiple access (OFDMA); time varying; uplink;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2006.887559
