RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD

摘要

Provided is a radio communication device which can make Acknowledgement (ACK) reception quality and Negative Acknowledgement (NACK) reception quality to be equal to each other. The device includes: a scrambling unit (214) which multiplies a response signal after modulated, by a scrambling code “1” or “e−j(π/2)” so as to rotate a constellation for each of response signals on a cyclic shift axis; a spread unit (215) which performs a primary spread of the response signal by using a Zero Auto Correlation (ZAC) sequence set by a control unit (209); and a spread unit (218) which performs a secondary spread of the response signal after subjected to the primary spread, by using a block-wise spread code sequence set by the control unit (209).

主权项

1. A device comprising:
circuitry that multiplies a symbol representing an Acknowledgment (ACK) or Negative Acknowledgement (NACK) with a sequence defined by one of a plurality of cyclic shift values and that scrambles the symbol by a scrambling code, said one of the plurality of cyclic shift values being determined from an index of a resource to which a physical uplink control channel is mapped, the scrambling code being ej(π/2) when the index is odd, and the scrambling code being 1 when the index is even; and a transmitter that transmits the multiplied and scrambled symbol on the physical uplink control channel.