Radio communication apparatus and radio communication method
AssigneePanasonic Intellectual Property Corporation of America
InventorsSeigo Nakao, Daichi Imamura
Life of this patent
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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).
Claims12
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, that spreads the symbol using one of a plurality of orthogonal sequences, and that scrambles the symbol by a scrambling code, said one of the plurality of cyclic shift values and said one of the plurality of orthogonal sequences 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, spread and scrambled symbol on the physical uplink control channel.
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, 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, and that scrambles the symbol by a scrambling code, the scrambling code being ej(π/2) when the resource is one of two resources, the scrambling code being 1 when the resource is the other of said two resources, said two resources being respectively associated with two cyclic shift values of the plurality of cyclic shift values, and a difference between said two cyclic shift values being a given value;
- and
- a transmitter that transmits the multiplied and scrambled symbol on the physical uplink control channel.
A method comprising:
- multiplying a symbol representing an Acknowledgment (ACK) or Negative Acknowledgement (NACK) with a sequence defined by one of a plurality of cyclic shift values
- spreading the symbol using one of a plurality of orthogonal sequences;
- scrambling the symbol by a scrambling code, said one of the plurality of cyclic shift values and said one of the plurality of orthogonal sequences 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
- transmitting the multiplied, spread and scrambled symbol on the physical uplink control channel.
A method comprising:
- multiplying a symbol representing an Acknowledgment (ACK) or Negative Acknowledgement (NACK) with a sequence defined by one of a plurality of cyclic shift values, 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;
- scrambling the symbol by a scrambling code, the scrambling code being ej(π/2) when the resource is one of two resources, the scrambling code being 1 when the resource is the other of said two resources, said two resources being respectively associated with two cyclic shift values of the plurality of cyclic shift values, and a difference between said two cyclic shift values being a given value;
- and
- transmitting the multiplied and scrambled symbol on the physical uplink control channel.
Dependencies are inferred from the claim text.