Patent ID: 9048912
Filing Date: 2015-06-02
Classification: H04B,H04J,H04L

Abstract:
1. A mobile terminal apparatus comprising: a reference signal generator configured to generate an uplink reference signal with use of a signal sequence which is orthogonalized by shifting a start point; a cyclic shift section configured to cyclically shift a plurality of the uplink reference signals so that the uplink reference signals are orthogonalized; a spreading section configured to obtain orthogonal codes for orthogonalizing the uplink reference signals from a radio base station apparatus and make the uplink reference signals able to be orthogonalized between users based on the orthogonal codes; and a transmitter configured to transmit the cyclically shifted uplink reference signals to the radio base station apparatus via a plurality of antenna ports in an uplink, wherein the transmitter is able to transmit, via the antenna ports, the uplink reference signals comprising first to fourth uplink reference signals, the spreading section applies a first orthogonal code to the first and second uplink reference signals and applies a second orthogonal code, which is different from the first orthogonal code, to the third and fourth uplink reference signals, and the cyclic shift section cyclically shifts the uplink reference signals in such a manner that cyclic shift values of the first and second uplink reference signals are shifted from each other by a half of total resources, cyclic shift values of the third and fourth uplink reference signals are shifted from each other by the half of total resources and the cyclic shift values of the respective uplink reference signals differ from each other.