Transmitting spread signal in communication system

• US 8,792,570 B2
• Filed: 06/16/2011
• Issued: 07/29/2014
• Est. Priority Date: 06/13/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Jung Hoon, Kim, Ki Jun, Roh, Dong Wook, Lee, Dae Won, Ahn, Joon Kui
• Primary Examiner(s): Burd, Kevin M
• Application Number:
  US13/162,487
• Publication Number:
  US 20110243198A1
• Time in Patent Office: 1,139 Days
• Field of Search: 375/230, 375/259, 375/260, 375/267, 370/342
• US Class Current: 375/260
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 7/0678 using different spreading codes between antennas code allocation H04J13/16
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 13/16 Code allocation
• CPC Class Codes: H04L 1/0606 Space-frequency coding
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/0021 in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861

Abstract

The present invention provides for transmitting a spread signal in a mobile communication system. The present invention includes spreading a signal using a plurality of spreading codes, wherein the plurality of spreading codes have a spreading factor, multiplexing the spread signal by code division multiplexing, transmitting the multiplexed signal via a plurality of neighboring frequency resources of one OFDM symbol of a first antenna set, and transmitting the same multiplexed signal via a plurality of neighboring frequency resources of one OFDM symbol of a second antenna set.

Claims

1. A method for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information in a mobile communication system, the method performed by a base station and comprising:

generating first spread ACK/NACK information using an orthogonal sequence with a spreading factor of 4;

generating second spread ACK/NACK information using the orthogonal sequence;

coding the first spread ACK/NACK information as shown in Table 1; and

coding the second spread ACK/NACK information as shown in Table 2;

2. The method of claim 1, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers exist in different Orthogonal Frequency-Division Multiplexing (OFDM) symbols.

3. The method of claim 1, further comprising:

generating third spread ACK/NACK information using the orthogonal sequence;

coding the third spread ACK/NACK information as shown in Table 3;

4. The method of claim 1, wherein the antennas A and B are first two contiguously numbered antennas, and the antennas C and D are second two contiguously numbered antennas.

5. The method of claim 1, wherein the antennas A and B are odd-numbered antennas, and the antennas C and D are even-numbered antennas.

6. A method of communicating in a mobile communication system comprising a user equipment (UE) and a base station (BS), the method comprising:

generating, by the BS, first spread ACK/NACK information using an orthogonal sequence with a spreading factor of 4;

generating, by the BS, second spread ACK/NACK information using the orthogonal sequence;

coding, by the BS, the first spread ACK/NACK information as shown in Table 1; and

coding, by the BS, the second spread ACK/NACK information as shown in Table 2;

receiving, by the UE, the first spread ACK/NACK information from the BS; and

receiving, by the UE, the second spread ACK/NACK information from the BS;

7. The method of claim 6, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers exist in different Orthogonal Frequency-Division Multiplexing (OFDM) symbols.

8. The method of claim 6, further comprising:

receiving, by the UE, third spread ACK/NACK information, wherein the third spread ACK/NACK information includes the orthogonal sequence with the spreading factor of 4,

wherein the third spread ACK/NACK information is coded over the multiple antennas of the BS as shown in Table 3;

9. The method of claim 6, wherein the antennas A and B are first two contiguously numbered antennas, and the antennas C and D are second two contiguously numbered antennas.

10. The method of claim 6, wherein the antennas A and B are odd-numbered antennas, and the antennas C and D are even-numbered antennas.

11. A base station for use in a mobile communication system, the base station comprising:

a radio frequency unit configured to transmit a radio frequency signal; and

a processor operably coupled to the radio frequency unit and configured to;

generate first spread Acknowledgement/Negative acknowledgement (ACK/NACK) information using an orthogonal sequence with a spreading factor of 4;

generate second spread ACK/NACK information using the orthogonal sequence;

code the first spread ACK/NACK information as shown in Table 1; and

code the second spread ACK/NACK information as shown in Table 2;

12. The base station of claim 11, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers exist in different Orthogonal Frequency-Division Multiplexing (OFDM) symbols.

13. The base station of claim 11, wherein the processor is further configured to generate third spread ACK/NACK information using the orthogonal sequence, and to code the third spread ACK/NACK information as shown in Table 3:

14. The base station of claim 11, wherein the antennas A and B are first two contiguously numbered antennas, and the antennas C and D are second two contiguously numbered antennas.

15. The base station of claim 11, wherein the antennas A and B are odd-numbered antennas, and the antennas C and D are even-numbered antennas.

16. A mobile communication system including a user equipment (UE) and a base station (BS),

the BS comprising:

a first radio frequency unit configured to transmit a radio frequency signal; and

a first processor operably coupled to the first radio frequency unit and configured to;

generate first spread Acknowledgement/Negative acknowledgement (ACK/NACK) information using an orthogonal sequence with a spreading factor of 4;

generate second spread ACK/NACK information using the orthogonal sequence;

code the first spread ACK/NACK information as shown in Table 1; and

code the second spread ACK/NACK information as shown in Table 2; and

the UE comprising;

a second radio frequency unit configured to transmit a radio frequency signal; and

a second processor operably coupled to the second radio frequency unit and configured to control the second radio frequency unit to;

receive the first spread ACK/NACK information from the BS; and

receive the second spread ACK/NACK information from the BS;

17. The mobile communication system of claim 16, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers exist in different Orthogonal Frequency-Division Multiplexing (OFDM) symbols.

18. The mobile communication system of claim 16, wherein the second processor is further configured to control the second radio frequency to receive third spread ACK/NACK information, wherein the third spread ACK/NACK information includes the orthogonal sequence with the spreading factor of 4,

wherein the third spread ACK/NACK information is coded over the multiple antennas of the BS as shown in Table 3:

19. The mobile communication system of claim 16, wherein the antennas A and B are first two contiguously numbered antennas, and the antennas C and D are second two contiguously numbered antennas.

20. The mobile communication system of claim 16, wherein the antennas A and B are odd-numbered antennas, and the antennas C and D are even-numbered antennas.