Communication apparatus and communication method for dual stream dual carrier modulation

A second communication apparatus, comprising:

• a receiver, which, in operation, receives a signal comprising first information indicating whether a mapping of two or more modulation symbols modulated from an information bit of the signal to two or more subcarriers is applied across two or more spatial streams of an OFDM symbol and second information indicating whether a data rate adjustment is applied to the signal;
• and
• circuitry, which, in operation, is configured to decode and demodulate the signal to obtain information of the information bit mapped to the two or more spatial streams.

A communication method implemented by a first communication apparatus, comprising:

• setting first information indicating whether a mapping of two or more modulation symbols modulated from an information bit of a signal to two or more subcarriers is applied across two or more spatial streams of an OFDM symbol and second information indicating whether a data rate adjustment is applied to the signal;
• and
• transmitting the signal with the mapping of the two or more modulation symbols across the two or more spatial streams and/or the data rate adjustment, the signal comprising the first information and the second information.

A communication method implemented by a second communication apparatus, comprising:

• receiving a signal comprising first information indicating whether a mapping of two or more modulation symbols modulated from an information bit of the signal to two or more subcarriers is applied across two or more spatial streams of an OFDM symbol and second information indicating whether a data rate adjustment is applied to the signal;
• and
• decoding and demodulating the signal to obtain information of the information bit mapped to the two or more spatial streams.