Transmitting spread signal in communication system

• US 9,048,992 B2
• Filed: 05/27/2014
• Issued: 06/02/2015
• 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, Daewon, Ahn, Joon Kui
• Primary Examiner(s): Bocure, Tesfaldet
• Application Number:
  US14/288,185
• Publication Number:
  US 20140269965A1
• Time in Patent Office: 371 Days
• Field of Search: 375/130, 375/140, 375/141, 375/144, 375146-148, 375/267, 375/260, 375/295, 375/299, 375/316, 375/347, 370/310, 370/319, 370/320, 370/335, 370/431, 370/441, 370/445, 370/203, 370/208, 370/209, 370/210, 455/99, 455/101, 455/132, 714746-749
• US Class Current: 1/1
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 2201/709718 Determine interference
• CPC Class Codes: H04B 7/0413 MIMO systems
• 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 1/0643 block codes
• CPC Class Codes: H04L 1/1621 Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• 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 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861

Abstract

A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information.

Claims

1. A method for communicating Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system, the method comprising:

spreading, by a base station, first ACK/NACK information using an orthogonal sequence with a spreading factor of 2;

spreading, by the base station, second ACK/NACK information using an orthogonal sequence with the spreading factor of 2;

transmitting, by the base station, the first and second spread ACK/NACK information via multiple antennas; and

receiving, by a terminal, the first and second spread ACK/NACK information,

wherein the first and second spread ACK/NACK information is coded on four available neighboring subcarriers of the multiple antennas in a form of Table 1 or 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 on different OFDM symbols.

3. The method of claim 1, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers are separated by a plurality of subcarriers in a frequency domain.

4. The method of claim 3, further comprising:

transmitting, by the base station, third and fourth spread ACK/NACK information via the multiple antennas; and

receiving, by the terminal, the third and fourth spread ACK/NACK information,

wherein the first and second spread ACK/NACK information is coded on the first set of four available neighboring subcarriers in the form of Table 1,

wherein the third and fourth spread ACK/NACK information is coded on the second set of four available neighboring subcarriers in a form of Table 3,

wherein the first spread ACK/NACK information and the third spread ACK/NACK information have same ACK/NACK information, and

wherein the second spread ACK/NACK information and the fourth spread ACK/NACK information have same ACK/NACK information;

5. The method of claim 4, further comprising:

transmitting, by the base station, fifth and sixth spread ACK/NACK information via the multiple antennas; and

receiving, by the terminal, the fifth and sixth spread ACK/NACK information,

wherein the fifth and sixth spread ACK/NACK information is coded on a third set of four available neighboring subcarriers in a form of Table 4,

wherein the first spread ACK/NACK information and the fifth spread ACK/NACK information have same ACK/NACK information, and

wherein the second spread ACK/NACK information and the sixth spread ACK/NACK information have same ACK/NACK information;

6. 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.

7. 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.

8. A mobile communication system including a base station and a terminal, wherein:

the base station is configured to spread first ACK/NACK information using an orthogonal sequence with a spreading factor of 2, to spread second ACK/NACK information using an orthogonal sequence with the spreading factor of 2, and to transmit the first and second spread ACK/NACK information via multiple antennas; and

the terminal is configured to receive the first and second spread ACK/NACK information,

wherein the first and second spread ACK/NACK information is coded on four available neighboring subcarriers of the multiple antennas in a form of Table 1 or 2;

9. The mobile communication system of claim 8, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers exist on different OFDM symbols.

10. The mobile communication system of claim 8, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers are separated by a plurality of subcarriers in a frequency domain.

11. The mobile communication system of claim 10, wherein:

the base station is further configured to transmit third and fourth spread ACK/NACK information via the multiple antennas; and

the terminal is further configured to receive the third and fourth spread ACK/NACK information, wherein the first and second spread ACK/NACK information is coded on the first set of four available neighboring subcarriers in the form of Table 1,

wherein the third and fourth spread ACK/NACK information is coded on the second set of four available neighboring subcarriers in a form of Table 3,

wherein the first spread ACK/NACK information and the third spread ACK/NACK information have same ACK/NACK information, and

wherein the second spread ACK/NACK information and the fourth spread ACK/NACK information have same ACK/NACK information;

12. The mobile communication system of claim 11, wherein:

the base station is further configured to transmit fifth and sixth spread ACK/NACK information via the multiple antennas; and

the terminal is further configured to receive the fifth and sixth spread ACK/NACK information,

wherein the fifth and sixth spread ACK/NACK information is coded on a third set of four available neighboring subcarriers in a form of Table 4,

wherein the first spread ACK/NACK information and the fifth spread ACK/NACK information have same ACK/NACK information, and

wherein the second spread ACK/NACK information and the sixth spread ACK/NACK information have same ACK/NACK information;

13. The mobile communication system of claim 8, wherein the antennas A and B are first two contiguously numbered antennas, and the antennas C and D are second two contiguously numbered antennas.

14. The mobile communication system of claim 8, wherein the antennas A and B are odd-numbered antennas, and the antennas C and D are even-numbered antennas.