Patent ID: 7903628

Claim:
An apparatus to transmit pilots in an efficient manner to achieve good performance while reducing pilot overload comprising: at least one processor configured to: a) determine an assignment of resources for transmission in a wireless communication system, and b) select pilot placements based on the assignment of resources, wherein different pilot placements are used for different assignments of resources, that correspond to either different numbers of frames, different numbers of H-ARQ interlaces or different numbers of subcarriers, a memory coupled to the at least one processor; wherein the assignment is for at least one H-ARQ interlace, and wherein the at least one processor is configured to determine a placement of at least one pilot in each of the at least one H-ARQ interlace based on the number of H-ARQ interlaces in the assignment or the placement of pilots in preceding interlaces; wherein the assignment comprises at least one frame, each frame spanning a predetermined time duration.