Blind Carrier Frequency Offset Synchronization for OFDM Systems based on
Higher Order Statistics
W. Chung and C.R. Johnson, Jr.
Abstract
We develop a new blind carrier frequency offset correction scheme for OFDM
systems based on fourth order statistics. The proposed algorithm does not
require the transmission of known signals and performs perfect frequency
offset synchronization under a certain condition on the channel which is
satisfied for virtually all OFDM channels in practical situations. The
global convergence of this algorithm to a unimodal solution can be shown
independently from the channel. Simulation results and the connection to
other algorithms, such as Maximum Likelihood (ML) approximation and
Constant Modulus Algorithm (CMA), are presented.
