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

• US 9,166,744 B2
• Filed: 10/07/2014
• Issued: 10/20/2015
• 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:
  US14/508,275
• Publication Number:
  US 20150055643A1
• Time in Patent Office: 378 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 for transmitting and receiving information symbols in a communication system are provided. A method includes determining a channel quality indicator (CQI); determining two acknowledgement bits in response to data reception; generating a first symbol based on the CQI; generating a second symbol based on the two acknowledgement bits; and transmitting the first symbol and the second symbol. A first code is applied to the second symbol, if the two acknowledgement bits have a first value, a second code is applied to the second symbol, if the two acknowledgement bits have a second value, a third code is applied to the second symbol, if the two acknowledgement bits have a third value, and a fourth code is applied to the second symbol, if the two acknowledgement bits have a fourth value.

Claims

1. A method for transmitting information symbols in a single-carrier frequency division multiple access communication system, the method comprising:

determining a channel quality indicator (CQI);

determining two acknowledgement bits in response to data reception, the two acknowledgement bits representing two acknowledgements;

generating a first symbol based on the CQI;

generating a second symbol based on the two acknowledgement bits; and

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

wherein a first code is applied to the second symbol, if the two acknowledgement bits have a first value, a second code is applied to the second symbol, if the two acknowledgement bits have a second value, a third code is applied to the second symbol, if the two acknowledgement bits have a third value, and a fourth code is applied to the second symbol, if the two acknowledgement bits have a fourth value.

2. The method of claim 1, wherein the second symbol is based on the two acknowledgement bits and a reference signal.

3. The method of claim 1, wherein at least one of the first code, the second code, the third code, and the fourth code includes a complex number.

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

1, j, and −

j, respectively, and the j is an imaginary unit.

5. An apparatus for transmitting information symbols in a single-carrier frequency division multiple access communication system, the apparatus comprising:

a controller to determine a channel quality indicator (CQI) and two acknowledgement bits, and to generate a first symbol and a second symbol based on the CQI and the two acknowledgement bits, respectively, the two acknowledgement bits being determined in response to data reception and representing two acknowledgements; and

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

wherein a first code is applied to the second symbol, if the two acknowledgement bits have a first value, a second code is applied to the second symbol, if the two acknowledgement bits have a second value, a third code is applied to the second symbol, if the two acknowledgement bits have a third value, and a fourth code is applied to the second symbol, if the two acknowledgement bits have a fourth value.

6. The apparatus of claim 5, wherein the controller generates the second symbol based on the two acknowledgement bits and a reference signal.

7. The apparatus of claim 5, wherein at least one of the first code, the second code, the third code, and the fourth code include a complex number.

8. The apparatus of claims 5, wherein the first code, the second code, the third code, and the fourth code are 1, −

1, j, and −

j, respectively, and the j is an imaginary unit.

9. A method for receiving information symbols in a single-carrier frequency division multiple access communication system, the method comprising:

receiving a first symbol and a second symbol in a slot;

identifying a channel quality indicator (CQI) based on the first symbol; and

identifying two acknowledgement bits based on the second symbol, the two acknowledgement bits representing two acknowledgements,

wherein a first code is applied to the second symbol, if the two acknowledgement bits have a first value, a second code is applied to the second symbol, if the two acknowledgement bits have a second value, a third code is applied to the second symbol, if the two acknowledgement bits have a third value, and a fourth code is applied to the second symbols, if the two acknowledgement bits have a fourth value.

10. The method of claim 9, further comprising identifying a reference signal from the second symbol.

11. The method of claim 9, wherein at least one of the first code, the second code, the third code, and the fourth code includes a complex number.

12. The method of claims 9, wherein the first code, the second code, the third code, and the fourth code are 1, −

1, j, and −

j, respectively, and the j is an imaginary unit.

13. An apparatus for receiving information symbols in a single-carrier frequency division multiple access communication system, the apparatus comprising:

a receiver to receive a first symbol and a second symbol in a slot; and

a controller to identify a channel quality indicator (CQI) based on the first symbol, and to identify two acknowledgement bits based on the second symbol, the two acknowledgement bits representing two acknowledgements,

wherein a first code is applied to the second symbol, if the two acknowledgement bits have a first value, a second code is applied to the second symbol, if the two acknowledgement bits have a second value, a third code is applied to the second symbol, if the two acknowledgement bits have a third value, and a fourth code is applied to the second symbol, if the two acknowledgement bits have a fourth value.

14. The apparatus of claim 13, wherein the controller identifies a reference signal from the second symbol.

15. The apparatus of claim 13, wherein at least one of the first code, the second code, the third code, and the fourth code includes a complex number.

16. The apparatus of claims 13, wherein the first code, the second code, the third code, and the fourth code are 1, −

1, j, and −

j, respectively, and the j is an imaginary unit.