Radio communication device and constellation control method

Details Radio communication device and constellation control method Radio communication device and constellation control method

2011-04-26

2011-04-26

Torres, Juan A (Department: 2611)

Pulse or digital communications

Spread spectrum

Reexamination Certificate

active

07933309

ABSTRACT:
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).

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