Apparatus and method for transmitting channel quality indicator and acknowledgement signals in SC-FDMA communication systems

• US 9,485,073 B2
• Filed: 09/25/2015
• Issued: 11/01/2016
• Est. Priority Date: 07/16/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Papasakellariou, Aris, Cho, Joon-Young
• Primary Examiner(s): Phillips, Hassan
• Assistant Examiner(s): Sharma, Gautam
• Application Number:
  US14/865,855
• Publication Number:
  US 20160013893A1
• Time in Patent Office: 403 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

A method and apparatus are provided for transmitting symbols in wireless communication system. A method includes determining a channel quality indicator (CQI) and one or more acknowledgements; generating a first symbol based on the CQI; generating a second symbol based on the one or more acknowledgements; and transmitting the first symbol and the second symbol in a slot. One of a first code and a second code is applied for generating the second symbol, if the one or more acknowledgements is one bit. One of the first code, the second code, a third code, and a fourth code is applied for generating the second symbol, if the one or more acknowledgements are two bits.

Claims

1. A method for transmitting symbols in wireless communication system, the method comprising:

determining a channel quality indicator (CQI) and one or more acknowledgements;

generating a first symbol based on the CQI;

generating a second symbol based on the one or more acknowledgements; and

transmitting the first symbol and the second symbol in a slot,

wherein one of a first code and a second code is applied for generating the second symbol, if the one or more acknowledgements is one bit, and

wherein one of the first code, the second code, a third code, and a fourth code is applied for generating the second symbol, if the one or more acknowledgements are two bits representing two acknowledgements.

2. The method of claim 1, wherein if the one or more acknowledgements is one bit,

the first code is applied for generating the second symbol if the one or more acknowledgements is negative, and

the second code is applied for generating the second symbol if the one or more acknowledgements is positive,

wherein the first code is applied for generating the second symbol if the one or more acknowledgements does not exist.

3. The method of claim 1, wherein the first code, the second code, the third code, and the fourth code are 1, −

1, j, and −

j, respectively, and

wherein the j is an imaginary unit.

4. The method of claim 1, wherein the second symbol is based on the one or more acknowledgements and a reference signal.

5. The method of claim 4, wherein the reference signal is determined based on a constant amplitude zero auto-correlation (CAZAC) sequence.

6. The method of claim 1, wherein the first symbol is generated based on a constant amplitude zero auto-correlation (CAZAC) sequence.

7. An apparatus for transmitting symbols in wireless communication system, the apparatus comprising:

a controller to determine a channel quality indicator (CQI) and one or more acknowledgements, generate a first symbol based on the CQI, and generate a second symbol based on the one or more acknowledgements; and

a transmitter to transmit the first symbol and the second symbol in a slot,

wherein one of a first code and a second code is applied for generating the second symbol, if the one or more acknowledgements is one bit, and

wherein one of the first code, the second code, a third code, and a fourth code is applied for generating the second symbol, if the one or more acknowledgements are two bits representing two acknowledgements.

8. The apparatus of claim 7, wherein if the one or more acknowledgements is one bit,

the first code is applied for generating the second symbol if the one or more acknowledgements is negative, and

the second code is applied for generating the second symbol if the one or more acknowledgements is positive,

wherein the first code is applied for generating the second symbol if the one or more acknowledgements does not exist.

9. The apparatus of claim 7, wherein the first code, the second code, the third code, and the fourth code are 1, −

1, j, and −

j, respectively, and

wherein the j is an imaginary unit.

10. The apparatus of claim 7, wherein the second symbol is based on the one or more acknowledgements and a reference signal.

11. The apparatus of claim 10, wherein the reference signal is determined based on a constant amplitude zero auto-correlation (CAZAC) sequence.

12. The apparatus of claim 7, wherein the first symbol is generated based on a constant amplitude zero auto-correlation (CAZAC) sequence.