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 (SNR>10)
the estimate scale is positive % negative 2.5 times carrier frequency unit.