TRANSMISSION APPARATUS AND PHASE ADJUSTMENT METHOD

PROBLEM TO BE SOLVED: To provide a technique for reducing electric power consumed by a memory for cancelling a phase difference generated at a plurality of passes.SOLUTION: A transmission apparatus includes a phase difference detection part, a memory part, a writing control part and a reading control part. The phase difference detection part detects a phase difference between paths from signals of a plurality of received paths. The memory part constitutes a ring memory large enough to absorb a phase difference to a predetermined reference phase for each path by a part or all of a plurality of physical memories. The writing control part writes data of signals of the plurality of received paths into a ring memory for each path formed in the memory part. The reading control part reads out data from a reading address corresponding to a phase difference for each path.