Title :
Comments on "channel estimation and signal detection for MIMO-OFDM with time varying channels"
Author :
Cao, Fei F. ; Li, Jiandong
Author_Institution :
State Key Lab. of ISN, Xidian Univ., Xi´´an, China
Abstract :
It is shown in (W.G. Song and J.T. Lim, 2006) that the proposed least squares channel estimator for multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) systems will acquire improved performance as the polynomial order increases, which we find is not generally the case. Analyses and simulation results are given to support our claim.
Keywords :
MIMO communication; OFDM modulation; channel estimation; polynomials; signal detection; time-varying channels; MIMO-OFDM; channel estimation; least squares channel estimator; polynomial order; signal detection; time varying channel; Channel estimation; Discrete Fourier transforms; Fading; Frequency division multiplexing; Frequency estimation; Least squares approximation; Polynomials; Receiving antennas; Signal detection; Transmitting antennas; MIMO-OFDM, channel estimation, polynomial approximation, fast fading channels;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2009.090819
