Radio communication device and constellation control method
AssigneePanasonic Corporation
InventorsSeigo Nakao, Daichi Imamura
Life of this patent
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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).
Claims17
A radio communication apparatus comprising:
- a spreading unit configured to spread control information with a sequence defined by one of cyclic shift values;
- a scrambling unit configured to multiply the control information by 1 or ej(π/2) depending on whether an index of a resource is odd or even, wherein the cyclic shift value is determined from the index of the resource used for transmission of the control information;
- and
- a transmitting unit configured to transmit the control information spread and multiplied by 1 or ej(π/2).
A constellation controlling method comprising:
- spreading control information with a sequence defined by a cyclic shift value;
- multiplying the control information by 1 or ej(π/2) depending on whether an index of a resource is odd or even, wherein the cyclic shift value is determined from the index of the resource used for transmission of the control information;
- and
- transmitting the control information spread and multiplied by 1 or ej(π/2).
Dependencies are inferred from the claim text.