Signal modulating method, signal demodulating method, device, storage medium and program product

A signal modulating method, comprising:

• determining, through quadrature phase shift keying (QPSK) constellation point mapping, at least one first frequency domain sequence corresponding to a bit sequence;
• determining, based on a complex number transformation on the at least one first frequency domain sequence, at least one second frequency domain sequence;
• using at least one duplication process, determining, based on the at least one first frequency domain sequence and the at least one second frequency domain sequence, data carried in a plurality of subcarriers;
• and
• generating a modulation signal based on the data carried in the plurality of subcarriers.

A device, comprising:

• a processor;
• and
• a memory configured to store computer readable instructions that, when executed by the processor, cause the device to:
• modulate a bit sequence onto a plurality of subcarriers, wherein
• the plurality of subcarriers include a first group of subcarriers and a second group of subcarriers;
• change a phase of first data carried in the first group of subcarriers by a first angle;
• and
• generate a modulation signal based on the first data carried in the first group of subcarriers and second data carried in the second group of subcarriers.