MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD

摘要

Provided are a mobile terminal apparatus, a radio base station apparatus and a communication method , capable of orthogonalizing up link reference signals be tween plural antennas in MIMO transmission. The mobile terminal apparatus has a reference signal generator (11) for generating DM-RSs using ZC sequences and a cyclic shift section (13) for cyclically shifting the DM-RSs by unit of plural antenna ports (19) to orthogonalize the DM-RSs for the antenna ports (19) between the antenna ports (19) , and the cyclically shifted DM-RSs are transmitted via the respective antenna ports (19) to a radio base station apparatus eNB in an uplink.