| 摘要 |
An embodiment of the present invention provides a method of using differential precoding feedback for correlated channels, comprising, transmitting by a mobile station (MS) as feedback an index angle for a differential discrete Fourier transform (DFT) codeword corresponding to a shift of a dominant beam represented by a base codeword, where the feedback corresponds to a precoding vector V(t)=Q({circumflex over (theta)}) for index angle theta, where Q  ( theta ^ ) = [ 1  j   2   pi   m / 32  j   4   pi   m / 32  j   6   pi   m / 32 ] and m=-16 cos({circumflex over (theta)}).
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