RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD
First Claim
1. A radio transmitting apparatus comprising:
- an acknowledgement/negative acknowledgement signal transmission processing section that spreads an acknowledgement/negative acknowledgement signal using an orthogonal sequence;
a reference signal phase adding section that adds a phase according to part of the orthogonal sequence, to a reference signal of a channel quality indicator multiplexed with the acknowledgement/negative acknowledgement spread using the orthogonal sequence; and
a transmitting section that transmits a channel quality indicator signal including the reference signal to which the phase is added.
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Accused Products
Abstract
It is possible to improve the CQI reception performance even when a delay is caused in a propagation path, a transmission timing error is caused, or a residual interference is generated between cyclic shift amounts of different ZC sequences. For the second symbol and the sixth symbol of the ACK/NACK signal which are multiplexed by RS of CQI, (+, +) or (−, −) is applied to a partial sequence of the Walsh sequence. For RS of CQI transmitted from a mobile station, + is added as an RS phase of the second symbol and − is added as an RS phase of the sixth symbol. A base station (100) receives multiplexed signals of ACK/NACK signals and CQI signals transmitted from a plurality of mobile stations. An RS synthesis unit (119) performs synthesis by aligning the RS phase of CQI.
31 Citations
9 Claims
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1. A radio transmitting apparatus comprising:
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an acknowledgement/negative acknowledgement signal transmission processing section that spreads an acknowledgement/negative acknowledgement signal using an orthogonal sequence; a reference signal phase adding section that adds a phase according to part of the orthogonal sequence, to a reference signal of a channel quality indicator multiplexed with the acknowledgement/negative acknowledgement spread using the orthogonal sequence; and a transmitting section that transmits a channel quality indicator signal including the reference signal to which the phase is added. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radio transmitting method comprising:
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an acknowledgement/negative acknowledgement signal transmission processing step of spreading an acknowledgement/negative acknowledgement signal using an orthogonal sequence; a reference signal phase adding step of adding a phase according to part of the orthogonal sequence, to a reference signal of a channel quality indicator multiplexed with the acknowledgement/negative acknowledgement signal spread using the orthogonal sequence; and a transmitting step of transmitting a channel quality indicator signal including the reference signal to which the phase is added.
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Specification