Patent ID: 8130631
Filing Date: 2012-03-06
Classification: H04L

Abstract:
1. A method comprising: receiving a first orthogonal frequency division multiplexing pilot symbol; receiving a second orthogonal frequency division multiplexing pilot symbol; frequency translating part of the first orthogonal frequency division multiplexing pilot symbol by one carrier interval in a first direction; frequency translating part of the second orthogonal frequency division multiplexing pilot symbol by one carrier interval in a second direction that is opposite from the first direction; and forming a correlation by multiplying the frequency translated part of the first orthogonal frequency division multiplexing pilot symbol by a complex conjugate of a part of the second orthogonal frequency division multiplexing pilot symbol upon which frequency translation has not been performed, multiplying the frequency translated part of the second orthogonal frequency division multiplexing pilot symbol by a complex conjugate of a part of the first orthogonal frequency division multiplexing pilot symbol upon which frequency translation has not been performed, and summing the multiplication results.