Patent ID: 8130726

Claim:
An apparatus comprising: a wireless receiver, wherein the wireless receiver comprises: at least one processor configured to perform correlation on received symbols for multiple subbands and multiple symbol periods for each of a plurality of hypotheses, each hypothesis representing one of a plurality of frequency error estimates, to derive a metric for each of the plurality of hypotheses based on correlation results for each of the plurality of hypotheses, and to determine a frequency error based on metrics derived for each of the plurality of hypotheses; and a memory coupled to the at least one processor; wherein for each hypothesis the at least one processor is configured to coherently sum correlation results for the multiple subbands in each correlation interval to obtain an intermediate value for the correlation interval, to coherently sum intermediate values for the multiple correlation intervals to obtain a first value, to non-coherently sum the intermediate values for the multiple correlation intervals to obtain a second value, and to derive the metric for the hypothesis based on a sum of the first and second values.