An OFDM Fractional & Integer Frequency Offset Joint Estimation Method
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Abstract
A joint estimation method for the peak detection & frequency offset calculation is derived which is quick, large scale, high precision, and robust.The correlation peak is detected by the double auto-correlator & robutst auto-correlating method for the fractional & integer frequency offset.The correct estimation frequency offset is got by the frequency offset status utility & the frequency offset operator.The method is simulated in the wlan receiver, in the IEEE TGN multipath channel Mode A~F, the peak detect correct rate is 100% (SNR>5) , the precision is less than 10-2.12 (SNR>10) , the estimate scale is positive & negative 2.5 times carrier frequency unit.
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