Patent ID: 9635600
Date: 2017-04-25
CPC Classifications: H04B,H04L,H04W

Claim:
1. A base station apparatus comprising: a transmitter which, in operation, transmits downlink data to a terminal apparatus; a receiver which, in operation, receives a plurality of transport blocks which are transmitted in a same time period using a same frequency band in a spatial multiplexing scheme, wherein a same acknowledgement information (ACK) relating to an error detection result of the downlink data is scrambled with different scrambling schemes respectively for the plurality of transport blocks and the respectively scrambled acknowledgement information is arranged on respective ones of the plurality of transport blocks, and channel quality information (CQI) of a downlink channel is arranged on only one transport block of the plurality of transport blocks by the terminal apparatus; and a control information receiver which, in operation, extracts the acknowledgement information arranged on respective ones of the plurality of transport blocks and the channel quality information arranged on the only one transport block of the plurality of transport blocks.