Transmitting method, receiving method, transmitting apparatus, and receiving apparatus

A receiving method for receiving an orthogonal frequency-division multiplexing (OFDM) signal, the receiving method comprising:

• receiving an orthogonal frequency-division multiplexing (OFDM) signal including a first preamble, a second preamble, and a data symbols, the data symbols including time-frequency resources provided for data transmission, first modulated signals of a first Physical Layer Pipe (PLP) being mapped onto the time-frequency resources corresponding to a first frequency range within an entirety of the data symbols, and second modulated signals of a second PLP being mapped onto the time-frequency resources corresponding to a second frequency range within the entirety of the data symbols;
• obtaining the first information and the second information;
• and
• demodulating at least one of the first PLP or the second PLP based on the first information and the second information, wherein
• the second preamble includes first information, for each of the first PLP and the second PLP, and second information,
• the first information indicates a head position in time, a head position in frequency, and the number of time resources of corresponding PLP, and
• the second information indicates FFT size of the data symbols.

A transmitting apparatus for transmitting an orthogonal frequency-division multiplexing (OFDM) signal, the transmitting apparatus comprising:

• a circuitry;
• and a transmitter, wherein the circuitry performs using the transmitter:
• generating a second preamble and data symbols, the data symbols including time-frequency resources provided for data transmission, first modulated signals of a first Physical Layer Pipe (PLP) being mapped onto the time-frequency resources corresponding to a first frequency range within an entirety of the data symbols, and second modulated signals of a second PLP being mapped onto the time-frequency resources corresponding to a second frequency range within the entirety of the data symbols;
• performing an Inverse Fast Fourier Transform (IFFT) processing on the second preamble and the data symbols;
• generating a first preamble followed by the second preamble and the data symbols;
• and
• transmitting the first preamble, the second preamble, and the data symbols, wherein
• the second preamble includes first information, for each of the first PLP and the second PLP, and second information,
• the first information indicates a head position in time, a head position in frequency, and the number of time resources of corresponding PLP, and
• the second information indicates FFT size of the data symbols.

A receiving apparatus for receiving an orthogonal frequency-division multiplexing (OFDM) signal, the receiving apparatus comprising:

• a circuitry;
• and a receiver, wherein the circuitry performs using the receiver:
• receiving an orthogonal frequency-division multiplexing (OFDM) signal including a first preamble, a second preamble, and a data symbols, the data symbols including time-frequency resources provided for data transmission, first modulated signals of a first Physical Layer Pipe (PLP) being mapped onto the time-frequency resources corresponding to a first frequency range within an entirety of the data symbols, and second modulated signals of a second PLP being mapped onto the time-frequency resources corresponding to a second frequency range within the entirety of the data symbols;
• obtaining the first information and the second information;
• and
• demodulating at least one of the first PLP or the second PLP based on the first information and the second information, wherein
• the second preamble includes first information, for each of the first PLP and the second PLP, and second information,
• the first information indicates a head position in time, a head position in frequency, and the number of time resources of corresponding PLP, and
• the second information indicates FFT size of the data symbols.