Granted Patent B2

US 12,231,355 · App. 18/164,791 · Granted Feb 18, 2025

Inventors: Young-ho Oh (Suwon-si, KR); Se-ho Myung (Seoul, KR); Hak-ju Lee (Seoul, KR)

Assignee: SAMSUNG ELECTRONICS CO., LTD.

H04L5/0007H04L5/0048H04L5/0053H04L27/2602H04L27/2607H04L27/2613H04L27/26134H04L5/0044H04L27/26025H04L27/26136

Abstract

Claims (307)

1. A transmitting apparatus comprising:

a frame generator configured to generate a frame comprising a plurality of orthogonal frequency division multiplexing (OFDM) symbols;

a processor configured to insert one or more pilots and one or more guard intervals (GIs) into the generated frame; and

a transmitter configured to transmit the frame into which the pilots and the GIs are inserted,

wherein the frame comprises a bootstrap, a preamble and a payload,

wherein the payload comprises one or more subframes,

wherein the one or more subframes are located following the preamble,

wherein a length of a guard interval (GI) inserted in the preamble is equal to a length of a GI inserted in a first subframe from among the one or more subframes, and

wherein a pilot density in the preamble is determined according to the length of the GI inserted in the preamble, the pilot density of the preamble being equal or greater than a pilot density in the first subframe.

2. The apparatus according to claim 1 , wherein the bootstrap comprises information on a Fast Fourier Transform (FFT) size of the one or more subframes, the length of the GI inserted in the preamble, and a pattern of a preamble pilot inserted in the preamble and an L1 basic mode, and wherein the information on the L1 basic mode comprises information for providing certain robustness levels.

3. The apparatus according to claim 2 , wherein the information on the pattern of the preamble pilot comprises Dx information on the pattern of the preamble pilot, and

wherein a Dx of the pattern of a scattered pilot is determined as a Dx having the greatest density among Dxs of the pattern of the scattered pilot.

4. The apparatus according to claim 3 , wherein the Dx of the pattern of the preamble pilot is one of multiples of 3 and multiples of 4, and

wherein the Dx is a carrier index difference between adjacent carriers in which the preamble pilot or the scattered pilot is inserted.

5. The apparatus according to claim 4 , wherein the Dx is one of 3, 4, 6, 8, 12, and 16.

6. The apparatus according to claim 2 , wherein the information on the pattern of the preamble pilot comprises Dy information on the pattern of the preamble pilot, and

wherein the Dy is 1.

7. The apparatus according to claim 3 , wherein the pattern of a scattered pilot is represented as shown in a table below according to the length of the GI inserted in the payload and the FFT size of the one or more subframes included in the payload:

GI Pattern

Samples

8K FFT

16K FFT

32K FFT

GI1_192

192

SP32_2, SP32_4

SP32_2, SP32_4

SP32_2

SP16_2, SP16_4

GI2_384

384

SP16_2, SP16_4

SP32_2, SP32_4

SP32_2

SP8_2, SP8_4

SP16_2, SP16_4

GI3_512

512

SP12_2, SP12_4

SP24_2, SP24_4

SP24_2

SP6_2, SP6_4

SP12_2, SP12_4

GI4_768

768

SP8_2, SP8_4

SP16_2, SP16_4

SP32_2, SP16_2

SP4_2, SP4_4

SP8_2, SP8_4

GI5_1024

1024

SP6_2, SP6_4

SP12_2, SP12_4

SP24_2, SP12_2

SP3_2, SP3_4

SP6_2, SP6_4

GI6_1535

1536

SP4_2, SP4_4

SP8_2, SP8_4

SP16_2, SP8_2

SP4_2, SP4_4

GI6_2048

2048

SP3_2, SP3_4

SP6_2, SP6_4

SP12_2, SP6_2

SP3_2, SP3_4

GI6_2432

2432

N/A

SP6_2, SP6_4

SP12_2, SP6_2

SP3_2, SP3_4

GI6_3072

3072

N/A

SP4_2, SP4_4

SP8_2, SP3_2

GI6_3648

3648

N/A

SP4_2, SP4_4

SP8_2, SP3_2

GI6_4096

4096

N/A

SP3_2, SP3_4

SP6_2, SP3_2

GI6_4864

4864

N/A

N/A

SP6_2, SP3_2

8. The apparatus according to claim 2 , wherein the information on the FFT size of the one or more subframes included in the preamble, the length of the GI inserted in the preamble, and the pattern of the preamble pilot inserted in the preamble is represented as shown in a table below:

FFT

GI Length

Pilot Pattern

Size

(samples)

(Dx)

8192

2048

3

8192

1536

4

8192

1024

3

8192

768

4

16384

4096

3

16384

3648

4

16384

2432

3

16384

1536

4

16384

1024

6

16384

768

8

32788

4864

3

32768

3648

3

32768

3648

8

32768

2432

6

32768

1536

8

32768

1024

12

32768

768

16

9. The apparatus according to claim 1 , wherein a pattern of a pilot inserted in the preamble is obtained based on the length of the GI inserted in the preamble and a Fast Fourier Transform (FFT) size of the one or more subframes.

10. A receiving apparatus comprising:

a receiver configured to receive a frame comprising a plurality of orthogonal frequency division multiplexing (OFDM) symbols; and

a processor configured to process the frame,

wherein the frame comprises one or more pilots and one or more guard intervals (GIs)

wherein the frame comprises a bootstrap, a preamble and a payload,

wherein the payload comprises one or more subframes,

wherein a length of a guard interval (GI) included in the preamble is equal to a length of a GI included in a first subframe from among the one or more subframes, and

wherein a pilot density in the preamble is determined according to the length of the GI included in the preamble, the pilot density of the preamble being equal or greater than a pilot density in the first subframe.

11. The apparatus according to claim 10 , wherein the bootstrap comprises information on a Fast Fourier Transform (FFT) size of the one or more subframes, the length of the GI included in the preamble, and a pattern of a preamble pilot included in the preamble and an L1 basic mode, and wherein the information on the L1 basic mode comprises information for providing certain robustness levels.

12. The apparatus according to claim 11 , wherein the information on the pattern of the preamble pilot comprises Dx information on the pattern of the preamble pilot, and

wherein a Dx of the pattern of a scattered pilot is determined as a Dx having the greatest density among Dxs of the pattern of the scattered pilot.

13. The apparatus according to claim 12 , wherein the Dx of the pattern of the preamble pilot is one of multiples of 3 and multiples of 4, and

wherein the Dx is a carrier index difference between adjacent carriers in which the preamble pilot or the scattered pilot is included.

14. The apparatus according to claim 13 , wherein the Dx is one of 3, 4, 6, 8, 12, and 16.

15. The apparatus according to claim 11 , wherein the information on the pattern of the preamble pilot comprises Dy information on the pattern of the preamble pilot, and

wherein the Dy is 1.

16. The apparatus according to claim 12 , wherein the pattern of a scattered pilot is represented as shown in a table below according to the length of the GI included in the payload and the FFT size of the one or more subframes included in the payload:

GI Pattern

Samples

8K FFT

16K FFT

32K FFT

GI1_192

192

SP32_2, SP32_4

SP32_2, SP32_4

SP32_2

SP16_2, SP16_4

GI2_384

384

SP16_2, SP16_4

SP32_2, SP32_4

SP32_2

SP8_2, SP8_4

SP16_2, SP16_4

GI3_512

512

SP12_2, SP12_4

SP24_2, SP24_4

SP24_2

SP6_2, SP6_4

SP12_2, SP12_4

GI4_768

768

SP8_2, SP8_4

SP16_2, SP16_4

SP32_2, SP16_2

SP4_2, SP4_4

SP8_2, SP8_4

GI5_1024

1024

SP6_2, SP6_4

SP12_2, SP12_4

SP24_2, SP12_2

SP3_2, SP3_4

SP6_2, SP6_4

GI6_1535

1536

SP4_2, SP4_4

SP8_2, SP8_4

SP16_2, SP8_2

SP4_2, SP4_4

GI6_2048

2048

SP3_2, SP3_4

SP6_2, SP6_4

SP12_2, SP6_2

SP3_2, SP3_4

GI6_2432

2432

N/A

SP6_2, SP6_4

SP12_2, SP6_2

SP3_2, SP3_4

GI6_3072

3072

N/A

SP4_2, SP4_4

SP8_2, SP3_2

GI6_3648

3648

N/A

SP4_2, SP4_4

SP8_2, SP3_2

GI6_4096

4096

N/A

SP3_2, SP3_4

SP6_2, SP3_2

GI6_4864

4864

N/A

N/A

SP6_2, SP3_2

17. The apparatus according to claim 11 , wherein the information on the FFT size of the one or more subframes included in the preamble, the length of the GI included n the preamble, and the pattern of the preamble pilot included in the preamble is represented as shown in a table below.

FFT

GI Length

Pilot Pattern

Size

(samples)

(Dx)

8192

2048

3

8192

1536

4

8192

1024

3

8192

768

4

16384

4096

3

16384

3648

4

16384

2432

3

16384

1536

4

16384

1024

6

16384

768

8

32768

4864

3

32768

3648

3

32768

3648

8

32768

2432

6

32768

1536

8

32768

1024

12

32768

768

16

18. The apparatus according to claim 10 , wherein a pattern of a pilot included in the preamble is based on the length of the GI included in the preamble and a Fast Fourier Transform (FFT) size of the one or more subframes.

Priority Claims (1)

Continuity (5)

References Cited (51)