Radio communication device and constellation control method

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

2008-10-28

2010-12-07

Pathak, Sudhanshu C (Department: 2611)

Pulse or digital communications

Spread spectrum

C375S267000, C375S299000, C370S329000, C370S335000

Reexamination Certificate

active

07848385

ABSTRACT:
Provided is a radio communication device which can make ACK reception quality and 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(p/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 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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