METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A PILOT SEQUENCE IN A BROADCASTING COMMUNICATION SYSTEM

• US 20130170333A1
• Filed: 12/28/2012
• Published: 07/04/2013
• Est. Priority Date: 12/28/2011
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Jeong, Hong-Sil, YUN, Sung-Ryul
• Application Number:
  US13/729,483
• Publication Number:
  US 20130170333A1
• Time in Patent Office: Days
• US Class Current: 370/208
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 13/0062 Zadoff-Chu
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 27/2656 Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
• CPC Class Codes: H04L 27/2657 Carrier synchronisation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

A method and an apparatus for transmitting and receiving a pilot sequence in an Single Carrier-Orthogonal Frequency Division Multiplexing (SC-OFDM) scheme of a broadcasting communication system. The method includes determining seed values for Orthogonal Frequency Division Multiplexing (OFDM) symbols; generating pilot sequences including information related to an OFDM symbol index by applying a Zadoff-Chu sequence to each of the seed values; inserting the pilot sequences into a determined subcarrier position in a frame according to a pilot pattern; and transmitting the frame.

Claims

1. A method of transmitting a pilot sequence in a broadcasting communication system, the method comprising:

determining seed values for Orthogonal Frequency Division Multiplexing (OFDM) symbols;

generating pilot sequences including information related to an OFDM symbol index by applying a Zadoff-Chu sequence to each of the seed values;

inserting the pilot sequences into a determined subcarrier position in a frame according to a pilot pattern; and

transmitting the frame.

2. The method of claim 1, wherein the seed values are determined according to OFDM symbol intervals.

3. The method of claim 2, wherein each of the seed values is defined as

4. The method of claim 3, wherein the pilot sequences are defined as

5. The method of claim 4, wherein the information related to the OFDM symbol index is defined as D_xu_l+l mod D_y,

where l mod D_y denotes a position value of the pilot subcarrier, u_l denotes the seed value, and D_x denotes an interval at which the pilot sequence is shifted.

6. A method of receiving a pilot sequence in a broadcasting communication system, the method comprising:

detecting a position of a pilot subcarrier in a received frame, by comparing sizes of the pilot subcarrier and a data subcarrier included in a received frame;

identifying a pilot sequence corresponding to the position of the pilot subcarrier;

detecting a seed value from the pilot sequence; and

detecting information related to an Orthogonal Frequency Division Multiplexing (OFDM) symbol index, using the position of the pilot subcarrier and the seed value,

wherein the pilot sequences are inserted into a determined subcarrier position of the frame according to a pilot pattern, and

wherein the pilot sequence is generated by applying a Zadoff-Chu sequence to each of a plurality of seed values including the seed value.

7. The method of claim 6, wherein the seed value is determined according to an OFDM symbol interval.

8. The method of claim 7, wherein the seed value is defined as

9. The method of claim 8, wherein the pilot sequence is defined as

10. The method of claim 9, wherein the information related to the OFDM symbol index is defined as D_xu_l+l mod D_y,

where l mod D_y denotes a position value of the pilot subcarrier, u_l denotes the seed value, and D_x denotes an interval at which the pilot sequence is shifted.

11. An apparatus for transmitting a pilot sequence in a broadcasting communication system, the apparatus comprising:

a control unit that determines seed values for Orthogonal Frequency Division Multiplexing (OFDM) symbols, generates pilot sequences including information related to an OFDM symbol index by applying a Zadoff-Chu sequence to each of the seed values, and inserts the pilot sequences into a determined subcarrier position in a frame according to a pilot pattern; and

a transmission unit that transmits the frame.

12. The apparatus of claim 11, wherein the seed values are determined according to OFDM symbol intervals.

13. The apparatus of claim 12, wherein each of the seed values are defined as

14. The apparatus of claim 13, wherein the pilot sequences are defined as

15. The apparatus of claim 14, wherein the information related to the OFDM symbol index is defined as D_xu_l+l mod D_y,

where l mod D_y denotes a position value of the pilot subcarrier, u_l denotes the seed value, and D_x denotes an interval at which the pilot sequence is shifted.

16. An apparatus for receiving a pilot sequence in a broadcasting communication system, the apparatus comprising:

a reception unit that receives a frame from a transmitter; and

a control unit that detects a position of a pilot subcarrier included in the frame by comparing sizes of the pilot subcarrier and a data subcarrier included in the frame, identifies a pilot sequence corresponding to the position of the pilot subcarrier, detects a seed value from the pilot sequence, and detects information related to an Orthogonal Frequency Division Multiplexing (OFDM) symbol index, using the position of the pilot subcarrier and the seed value,

wherein the pilot sequences are inserted into a determined subcarrier position of the frame according to a pilot pattern, and

wherein the pilot sequence is generated by applying a Zadoff-Chu sequence to each of a plurality of seed values including the seed value.

17. The apparatus of claim 16, wherein the seed value is determined according to an OFDM symbol interval.

18. The apparatus of claim 17, wherein the seed value is defined as

19. The apparatus of claim 18, wherein the pilot sequence is defined as

20. The apparatus of claim 19, wherein the information related to the OFDM symbol index is defined as D_xu_l+l mod D_y,

where l mod D_y denotes a position value of the pilot subcarrier, u_l denotes the seed value, and D_x denotes an interval at which the pilot sequence is shifted.