A signal processing method, applied to a base station, characterized in that the method comprises: determining a plurality of different tracking reference signals, TRSs, or channel state information-reference signals, CSI-RSs, each to be transmitted by a respective one of panels of a plurality of Remote Radio Heads, RRHs, to perform Doppler frequency estimation, transmitting the plurality of TRSs or CSI-RSs to the terminal; transmitting , to a terminal, first information, wherein the first information comprises information of association of the plurality of TRSs or CSI-RSs with a plurality of sounding reference signals, SRSs, wherein each of the plurality of SRSs is associated with a respective one of the plurality of TRSs or CSI-RSs, and the first information indicates the terminal to adjust a transmission frequency of each of the plurality of SRSs according to a Doppler frequency shift estimated by the terminal based on a respective one of the plurality of TRSs or CSI-RSs, receiving one SRS of the plurality of SRSs with an estimated Doppler frequency shift corresponding to the SRS from the terminal; and determining, according to the received one SRS, frequency estimated by the base station, wherein the information of association of the plurality of TRSs or CSI-RSs with the plurality of SRSs comprises at least one of: a parameter of each of the plurality of SRSs comprising a respective TRS identifier, ID, or a respective CSI-RS ID; or a transmission configuration indication, TCI, state of each of the plurality of SRSs, wherein a quasi-colocation, QCL, in the TCI state is associated with the respective TRS ID or the respective CSI-RS ID. determining a plurality of different tracking reference signals, TRSs, or channel state information-reference signals, CSI-RSs, each to be transmitted by a respective one of panels of a plurality of Remote Radio Heads, RRHs, to perform Doppler frequency estimation, transmitting the plurality of TRSs or CSI-RSs to the terminal; transmitting , to a terminal, first information, wherein the first information comprises information of association of the plurality of TRSs or CSI-RSs with a plurality of sounding reference signals, SRSs, wherein each of the plurality of SRSs is associated with a respective one of the plurality of TRSs or CSI-RSs, and the first information indicates the terminal to adjust a transmission frequency of each of the plurality of SRSs according to a Doppler frequency shift estimated by the terminal based on a respective one of the plurality of TRSs or CSI-RSs, receiving one SRS of the plurality of SRSs with an estimated Doppler frequency shift corresponding to the SRS from the terminal; and determining, according to the received one SRS, frequency estimated by the base station, wherein the information of association of the plurality of TRSs or CSI-RSs with the plurality of SRSs comprises at least one of: a parameter of each of the plurality of SRSs comprising a respective TRS identifier, ID, or a respective CSI-RS ID; or a transmission configuration indication, TCI, state of each of the plurality of SRSs, wherein a quasi-colocation, QCL, in the TCI state is associated with the respective TRS ID or the respective CSI-RS ID. a parameter of each of the plurality of SRSs comprising a respective TRS identifier, ID, or a respective CSI-RS ID; or a transmission configuration indication, TCI, state of each of the plurality of SRSs, wherein a quasi-colocation, QCL, in the TCI state is associated with the respective TRS ID or the respective CSI-RS ID. <EOS>