FIELD: radio engineering, communication.
SUBSTANCE: invention relates to wireless communication. A terminal device, wherein even in a case of applying SU-MIMO and MU-MIMO at the same time, the inter-sequence interference in a plurality of pilot signals used by the same terminal can be suppressed to a low value, while the inter-sequence interference in the pilot signal between terminals can be reduced. In the terminal device, a pilot information determining unit determines, based on allocation control information, Walsh sequences corresponding to one of first and second stream groups at least one of which includes a plurality of streams; and a pilot signal generating unit generates a transport signal by using the determined Walsh sequences to spread the streams included in the first and second stream groups. During this, Walsh sequences orthogonal to each other are established in the first and second stream groups, and users are allocated on a stream group-by-stream group basis.
EFFECT: high information transmission throughput.
40 cl, 22 dwg
