Radio communication apparatus and radio communication method
AssigneePanasonic Holdings Corporation
InventorsSeigo Nakao, Daichi Imamura
Life of this patent
Estimating the term…
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).
Claims14
A system comprising:
- a terminal 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 and that also multiples the symbol by ej(π/2) when an index of a resource to which a physical uplink control channel is mapped is odd, said one of the plurality of cyclic shift values being determined from the index;
- and
- a transmitter that transmits, to a base station the multiplied symbol on the physical uplink control channel;
- and
- the base station comprising:
- a receiver that receives, from the terminal, the multiplied symbol.
A system comprising:
- a terminal 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 also multiples the symbol by ej(π/2) when an index of a resource to which a physical uplink control channel is mapped is odd, and that does not multiply the symbol by ej(π/2) when the index is even, said one of the plurality of cyclic shift values being determined from the index;
- and
- a transmitter that transmits, to a base station, the multiplied symbol on the physical uplink control channel;
- and
- the base station comprising:
- a receiver that receives, from the terminal, the multiplied symbol.
A communication method comprising:
- multiplying, by a terminal, a symbol representing an Acknowledgment (ACK) or Negative Acknowledgement (NACK) with a sequence defined by one of a plurality of cyclic shift values and that also multiples the symbol by ej(π/2) when an index of a resource to which a physical uplink control channel is mapped is odd, said one of the plurality of cyclic shift values being determined from the index;
- and
- transmitting, by the terminal to a base station, the multiplied symbol on the physical uplink control channel;
- and
- receiving, by the base station, the multiplied symbol.
Dependencies are inferred from the claim text.