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US 2025/0062802 A1Published application
Signal generation method and signal generation device
AssigneeSun Patent Trust
InventorsYutaka MURAKAMI, Tomohiro KIMURA, Mikihiro OUCHI
Life of this patent
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Abstract
A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.
Claims4
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.
9 more elements
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.
12 more elements
Dependencies are inferred from the claim text.