Transmission method and transmission apparatus

1. A transmission method performed by a transmit end device, the method comprising:

performing a phase compensation operation of a corresponding frequency value on each of m first signals in k signals, to obtain m second signals, wherein each of the m first signals is located at a non-center frequency of a current carrier, each first signal is a synchronization signal or data, m and k each are positive integers, and m≤k, wherein a frequency the transmit end device is centered on is different from a frequency used when a receive end device receives a signal sent by the transmit end; and

performing sending processing on the m second signals.

2. The method according to claim 1 , wherein the performing sending processing on the m second signals comprises:

sending the m second signals; or

performing sending preprocessing on the m second signals, and sending preprocessed signals.

3. The method according to claim 1 , wherein before the performing the phase compensation operation of the corresponding frequency value on each of m first signals in k signals, the method further comprises:

performing subcarrier mapping on a first first signal and a second first signal in the m first signals; and

performing an N 1 -point inverse discrete Fourier transform on the first first signal obtained from the subcarrier mapping; and

performing an N 2 -point inverse discrete Fourier transform on the second first signal obtained from the subcarrier mapping.

4. The method according to claim 1 , wherein the synchronization signal is located in a bandwidth part (BWP).

5. The method according to claim 1 , wherein at least two of the m first signals have different subcarrier spacings.

6. A transmission apparatus, comprising:

a processor, configured to perform a phase compensation operation of a corresponding frequency value on each of m first signals in k signals, to obtain m second signals, wherein each of the m first signals is located at a non-center frequency of a current carrier, each first signal is a synchronization signal or data, m and k each are positive integers, and m≤k, wherein a frequency the transmission apparatus is centered on is different from a frequency used when a further transmission apparatus receives a signal sent by the transmission apparatus; and

a transmitter, configured to perform sending processing on the m second signals.

7. The apparatus according to claim 6 , wherein the transmitter configured to perform sending processing on the m second signals comprises the processor further configured to:

send the m second signals; or

perform preprocessing on the m second signals, and send preprocessed signals.

8. The apparatus according to claim 6 , wherein the processor is further configured to:

perform subcarrier mapping on a first first signal and a second first signal in the m first signals; and

perform an N 1 -point inverse discrete Fourier transform on the first first signal obtained from the subcarrier mapping; and

perform an N 2 -point inverse discrete Fourier transform on the second first signal obtained from the subcarrier mapping.

9. The apparatus according to claim 6 , wherein the synchronization signal is located in a bandwidth part (BWP).

10. The apparatus according to claim 6 , wherein at least two of the m first signals have different subcarrier spacings.

11. A transmission method performed by a receive end device, the method comprising:

obtaining a synchronization signal and a physical broadcast channel, wherein the physical broadcast channel comprises first indication information, and the first indication information indicates a first difference between a center frequency of the synchronization signal and a center frequency of first data or between the center frequency of the synchronization signal and a center frequency of a current carrier, wherein a frequency a transmission apparatus is centered on is different from a frequency used when the receive end device receives a signal sent by the transmission apparatus;

receiving the first data; and

demodulating the first data based on the first difference.

12. The method according to claim 11 , wherein before the demodulating the first data based on the first difference, the method further comprises:

performing a phase compensation operation on the first data based on the first difference.

13. The method according to claim 11 , wherein the first data is a system message, and wherein the center frequency of the system message is the same as a center frequency of a control channel indicating the system message.

14. A transmission apparatus, comprising:

a processor configured to obtain a synchronization signal and a physical broadcast channel, wherein the physical broadcast channel comprises first indication information, and the first indication information indicates a first difference between a center frequency of the synchronization signal and a center frequency of first data or between the center frequency of the synchronization signal and a center frequency of a current carrier, wherein a frequency a further transmission apparatus is centered on is different from a frequency used when the transmission apparatus receives a signal sent by the further transmission apparatus; and

a receiver, configured to receive the first data, wherein

the processor is further configured to demodulate the first data based on the first difference.

15. The apparatus according to claim 14 , wherein the processor is further configured to perform a phase compensation operation on the first data based on the first difference.

16. The apparatus according to claim 14 , wherein the first data is a system message, and wherein the center frequency of the system message is the same as a center frequency of a control channel indicating the system message.

17. A non-transitory computer readable medium storing program codes for use by a transmission apparatus, wherein the program codes comprise instructions for:

performing a phase compensation operation of a corresponding frequency value on each of m first signals in k signals, to obtain m second signals, wherein each of the m first signals is located at a non-center frequency of a current carrier, each first signal is a synchronization signal or data, m and k each are positive integers, and m≤k, wherein a frequency the transmission apparatus is centered on is different from a frequency used when a further transmission apparatus receives a signal sent by the transmission apparatus; and

sending processing on the m second signals.

18. A non-transitory computer readable medium storing program codes for use by a transmission apparatus, wherein the program codes comprise instructions for:

obtaining a synchronization signal and a physical broadcast channel, wherein the physical broadcast channel comprises first indication information, and the first indication information indicates a first difference between a center frequency of the synchronization signal and a center frequency of first data or between the center frequency of the synchronization signal and a center frequency of a current carrier, wherein a frequency a further transmission apparatus is centered on is different from a frequency used when the transmission apparatus receives a signal sent by the further transmission apparatus;

receiving the first data; and

demodulating the first data based on the first difference.