MIMO TRANSMISSION DEVICE AND MIMO TRANSMISSION METHOD

摘要

Provided are a MIMO transmission device and a MIMO transmission method which can improve reception quality of a response signal.  A terminal (100) as the MIMO transmission device maps a first and a second element of the ACK/NACK signal vector formed from ACK/NACK signals onto a first and a second stream, respectively, and transmits the elements contained in a 2SC-FDMA symbol in a single slot.  In the terminal (100), a response signal vector formation unit (140) forms [a·Sack, O] as the ACK/NACK signal vector in a first SC-FDMA symbol and [O, a·Sack] as an ACK/NACK signal vector in a second SC-FDMA symbol.  A precoding unit (165) uses a unitary matrix to precode the ACK/NACK signal vector formed in the response signal vector formation unit (140).