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”...http://www.google.com/patents/US8144745?utm_source=gb-gplus-sharePatent US8144745 - Radio communication device and constellation control method
