Patent ID: 8879673

Claim:
A method for coarse frequency synchronization in an orthogonal frequency division multiplexing (OFDM) receiver of an electronic apparatus, the method comprising the steps of: configuring an initial value of an integral multiple frequency offset (IFO) candidate signal as a zero value and alternately increasing and reducing the integral multiple frequency offset (IFO) candidate signal at one value interval; terminating an estimation signal of an unit IFO when a correlation peak value corresponding to the integral multiple frequency offset (IFO) candidate signal is greater than a first threshold; neglecting a confidence check not to perform the confidence check since the estimation signal of an unit IFO is reliable when the correlation peak value is greater than a second threshold after terminating the estimation signal of the unit IFO, and ending an acquisition of a coarse frequency synchronization (CFS); and defining the integral multiple frequency offset (IFO) candidate signal as a non-receiving status when the correlation peak value is less than a third threshold after terminating the estimation signals of the unit IFO, and ending an acquisition of a coarse frequency synchronization (CFS).