# US 11,444,739 B2 · Radio transmission device and radio transmission method

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- Number: US 11,444,739 B2
- Document ID: US11444739B2
- Status: Granted
- Kind: B2
- Application number: 17/037,347
- Filed: 2020-09-29
- Published: 2021-01-14
- Granted: 2022-09-13
- Earliest claimed: 2007-08-13
- Assignees: Godo Kaisha IP Bridge 1
- Applicants: Godo Kaisha IP Bridge 1
- Inventors: Seigo Nakao; Daichi Imamura; Yoshihiko Ogawa; Atsushi Matsumoto; Katsuhiko Hiramatsu
- Web page: https://patentgrep.com/patent/US11444739B2

## CPC

- H04J 13/004: {Orthogonal}
- H04L 5/0057: {Physical resource allocation for CQI}
- H04B 1/7075: with code phase acquisition
- H04J 11/0023: {Interference mitigation or co-ordination (direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541)}
- H04J 13/0062: {Zadoff-Chu}
- H04J 13/0074: {Code shifting or hopping}
- H04L 1/0028: {Formatting}
- H04L 1/1607: Details of the supervisory signal
- H04L 5/0016: {Time-frequency-code}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04L 27/00: Modulated-carrier systems
- H04W 24/02: Arrangements for optimising operational condition
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04L 1/0026: {Transmission of channel quality indication}
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## 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.

## Claims

### Claim 1

An integrated circuit comprising:
response signal transmission processing circuitry which, in operation, spreads a response signal using an orthogonal sequence;
reference signal phase adding circuitry which, in operation, adds a phase to a reference signal of a channel quality indicator multiplexed with the response signal spread using the orthogonal sequence; and
a transmitter which, in operation, transmits a channel quality indicator signal including the reference signal to which the phase is added,
wherein the reference signal phase adding circuitry adds the phase to the reference signal according to a number of radio transmitting apparatuses that use a pair of orthogonal sequences in which part of codes for spreading the response signal multiplexed with the reference signal is an in-phase, and a number of radio transmitting apparatuses that use a pair of orthogonal sequences in which part of codes for spreading the response signal multiplexed with the reference signal is a reverse phase.

### Claim 2 (depends on 1)

The integrated circuit according to claim 1, wherein the reference signal phase adding circuitry adds to the reference signal the phase according to part of the orthogonal sequence of higher priority in the orthogonal sequence to which priority of use is assigned.

### Claim 3 (depends on 1)

The integrated circuit according to claim 1, wherein the reference signal phase adding circuitry adds to the reference signal the phase according to part of codes used to perform second spreading of a response signal which is multiplexed with the reference signal and which is subjected to first spreading using a Zadoff-Chu sequence which is adjacent to a Zadoff-Chu sequence used to spread the channel quality indicator and which is associated with a smaller cyclic shift amount than a cyclic shift amount of the Zadoff-Chu sequence used to spread the channel quality indicator.

### Claim 4 (depends on 1)

The integrated circuit according to claim 1, wherein:
orthogonal sequences are used to perform second spreading of the response signal that is subjected to first spreading using a Zadoff-Chu sequence associated with a cyclic shift amount which is consecutive to a cyclic shift amount of the Zadoff-Chu sequence used to spread the channel quality indicator; and
the reference signal phase adding circuitry adds the phase to the reference signal according to a number of radio transmitting apparatuses using the orthogonal sequence in which part of codes used to perform second spreading of the response signal multiplexed with the reference signal is an in-phase and a number of radio transmitting apparatuses that use the orthogonal sequence in which part of codes used to perform second spreading of the response signal multiplexed with the reference signal is the reverse phase.

### Claim 5 (depends on 1)

The integrated circuit according to claim 1, wherein, in case where a signal superimposing the response signal on the channel quality indicator has a phase orthogonal to part of an orthogonal sequence used by an acknowledgement signal that applies the greatest interference to the signal, the reference signal phase adding circuitry makes the response signal to be superimposed on the channel quality indicator a negative acknowledgement signal.

### Claim 6 (depends on 5)

The integrated circuit according to claim 5, wherein the reference signal phase adding circuitry adds to the reference signal of the superimposed signal a phase according to part of the orthogonal sequence of higher priority in the orthogonal sequence to which priority of use is assigned.

### Claim 7 (depends on 1)

The integrated circuit according to claim 1, wherein, in case where a signal superimposing the response signal on the channel quality indicator has a phase orthogonal to part of an orthogonal sequence used by an acknowledgement signal that applies the greatest interference to the signal, the reference signal phase adding circuitry makes the response signal to be superimposed on the channel quality indicator an acknowledgement signal.