Signal processing method and apparatus

A signal processing method, comprising:

• receiving a first symbol;
• receiving a modulated second symbol, the modulated second symbol is modulated based on a first phase, a second frequency, and second duration, the first phase is a phase at the end of the first symbol, the second frequency is a transmission frequency used for the second symbol, the second duration is duration of a cyclic prefix of the second symbol, wherein phases between the modulated second symbol and the first symbol are continuous, the modulated second symbol is a next symbol after the first symbol;
• and
• demodulating the modulated second symbol based on the second frequency.

A signal processing apparatus, comprising a processor, wherein the processor is configured to execute a computer program or instructions stored in a memory, so that the apparatus performs the following steps:

• sending a first symbol;
• modulating a phase of a second symbol based on a first phase, a second frequency, and second duration, wherein the second symbol is a next symbol after the first symbol, the first phase is a phase at the end of the first symbol, the second frequency is a transmission frequency used for the second symbol, and the second duration is duration of a cyclic prefix of the second symbol;
• and
• sending a modulated second symbol by using the second frequency, wherein phases between the modulated second symbol and the first symbol are continuous.