Data and pilot frequency domain multiplexing super-Nyquist transmission method and transmission device

The invention provides a data and pilot frequency domain multiplexing super-Nyquist transmission method, which comprises the following steps of: converting each modulation symbol sequence of an information data block to be sent into an FTN frequency domain symbol sequence, and performing FTN frequency domain compression to obtain a first signal sequence; performing frequency domain multiplexing onthe first signal sequence and a pilot frequency sequence according to the data subcarrier position serial number and the pilot frequency subcarrier position serial number to obtain a first data and pilot frequency multiplexing sequence; mapping the first data and pilot frequency multiplexing sequence to effective subcarriers, and forming a second data and pilot frequency multiplexing sequence ofwhich the length value is the total number of the subcarriers; inverse discrete Fourier transform is carried out on the second data and the pilot multiplexing sequence to obtain a second signal sequence; and adding a guard int