Granted Patent B2

US 12,658,988 · App. 18/937,368 · Granted Jun 16, 2026

Inventors: Yutaka Murakami (Kanagawa, JP); Tomohiro Kimura (Osaka, JP); Mikihiro Ouchi (Osaka, JP)

Assignee: SUN PATENT TRUST

H04B7/0456H04B7/0413H04B7/0617

Abstract

Claims (28)

1 . A transmitting method comprising:

generating a first frame and a second frame; and

applying a phase change to the second frame to generate a second phase-changed frame, the phase change not being applied to the first frame; and

transmitting the first frame and the second phase-changed frame from a first antenna and a second antenna, respectively, wherein

in the phase change:

a first phase change value is applied to a first symbol in the second frame;

a second phase change value is applied to a second symbol adjacent to the first symbol in a time direction in the second frame;

a third phase change value is applied to a third symbol adjacent to the first symbol in a frequency direction in the second frame;

the second phase change value is different from the first phase change value; and

the third phase change value is different from the first phase change value.

2 . The transmitting method according to claim 1 , wherein

a phase change pattern of the phase change is determined based at least in part on a combination of a coding rate and a modulation scheme, and

at least two different phase change patterns are provided for a same combination of the coding rate and the modulation scheme.

3 . The transmitting method according to claim 1 , wherein

the second frame includes a pilot symbol and a data symbol, and

the phase change is not applied to the pilot symbol but applied to the data symbol.

4 . A receiving method comprising,

receiving a first frame and a second phase-changed frame from a first antenna and a second antenna, respectively; and

decoding the first frame and the second phase-changed frame, wherein the first frame and the second phase-changed frame are generated by a coding process, and

the coding process comprises:

generating the first frame and a second frame; and

applying a phase change to the second frame to generate the second phase-changed frame, the phase change not being applied to the first frame; and

in the phase change:

a first phase change value is applied to a first symbol in the second frame;

a second phase change value is applied to a second symbol adjacent to the first symbol in a time direction in the second frame;

a third phase change value is applied to a third symbol adjacent to the first symbol in a frequency direction in the second frame;

the second phase change value is different from the first phase change value; and

the third phase change value is different from the first phase change value.

Priority Claims (1)

Continuity (14)

References Cited (105)