TERMINAL APPARATUS AND SEQUENCE ASSIGNING METHOD

摘要

Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method, R×M sequences specified by a ZC sequence number r (r=1 to R) and a cyclic shift sequence number m (m=1 to M) are divided into a plurality of sequence groups X (X=1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R=9 and M=6, the number of sequences is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell.

主权项

1. A device, comprising:
a receiver, which, in operation, receives control information related to a sequence, the sequence being within one of a first group and a second group, the first group being divided into first subgroups each including a first number of one or more of first sequences, the second group being divided into second subgroups each including a second number of one or more of second sequences, the first sequences and the second sequences having different lengths, and the first number being different from the second number; and a transmitter, which, in operation, transmits a reference signal using the sequence based on the control information.