A power control system and method for communication system using space-time transmit diversity scheme. The memory control unit transfers, if a plurality of items of image data are to be transferred, at least one of the items of image data divisionally from the primary memory unit to the secondary memory unit. Mounting structure secures the fourth wall to the first wall. A ring is attached to one of the legs remote from the base and has a tab for coupling with the opposite leg to complete the structural volume.