Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
OFDM for Wireless Multimedia Communications
OFDM for Wireless Multimedia Communications
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
Orthogonal Frequency Division Multiplexing for Wireless Communications (Signals and Communication Technology)
Joint estimation of channel response, frequency offset, and phase noise in OFDM
IEEE Transactions on Signal Processing
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We consider the problem of pilot-aided accurate least squares (LS) channel estimation in the presence of carrier frequency offset (CFO). We first formulate the mean square error (MSE) of the LS channel estimator in the presence of CFO and then show how to select the pilot sequence (with element values constrained to plus or minus one) that minimizes the MSE. Our main conclusion is that, in the presence of CFO accurate channel estimates can be obtained by transmitting identical pilot symbol on all subcarriers. We demonstrate our results via computer simulations.