Patent ID: 8031586

Claim:
A method comprising: an apparatus receiving a timing adjustment value; the apparatus determining from the received timing adjustment value an integer portion and a fractional portion; in the frequency domain, the apparatus applying the determined fractional portion by rotating a signal; in the time domain, the apparatus applying the determined integer portion by one of inserting samples in the rotated signal or removing samples from the rotated signal in an amount corresponding to the determined integer portion; and subsequently, the apparatus transmitting the signal, wherein −1≦ε<1 is the determined fractional portion, X[k] is the signal prior to rotation, k=0,1, . . . , N a −1, N a is a number of active sub-carriers, and N is a total number of sub-carriers; wherein rotating the signal comprises: X ɛ ⁡ [ k ] = { X ⁡ [ k ] ⁢ exp ⁢ { j ⁣ 2 ⁢ π N ⁢ ( k - N a 2 ) ⁢ ( 1 - ɛ ) } , ɛ > 0 X ⁡ [ k ] ⁢ exp ⁢ { - j ⁣ 2 ⁢ π N ⁢ ( k - N a 2 ) ⁢ ɛ } , ɛ ≤ 0 .