A signal processing method, being applied in a base station device that comprises a frequency domain exchange module and at least two baseband processing units, wherein the frequency domain exchange module is connected to each of the at least two baseband processing units, a first baseband processing unit of the at least two baseband processing units corresponds to a serving cell of a user equipment, UE, and is configured to perform fast Fourier transformation, FFT, and de-mapping processing on a second time domain signal, and obtain a second frequency domain signal of the UE in the serving cell according to first configuration information from a base station controller, wherein the first configuration information comprises configuration of a first sub-carrier that is configured by the base station controller and is used when the UE sends data, and a second baseband processing unit of the at least two baseband processing units corresponds to a coordinated cell of the UE, and is configured to perform FFT and de-mapping processing on a first time domain signal and obtain a first frequency domain signal of the UE in the coordinated cell according to second configuration information from the base station controller, wherein the second configuration information comprises configuration of a second sub-carrier that is configured by the base station controller and is used when the UE sends data, and the frequency domain exchange module comprises at least two frequency domain exchange chips that are connected to each other, the at least two frequency domain exchange chips comprise a first frequency domain exchange chip and at least one second frequency domain exchange chip, the first frequency domain exchange chip and the first baseband processing unit are located in a first baseband board, and the at least one second frequency domain exchange chip and the second baseband processing unit are located in a second baseband board in the base station device, and the method comprises: receiving (101, 303, 505, 803), by the at least one second frequency domain exchange chip other than the first frequency domain exchange chip of the frequency domain exchange module, the first frequency domain signal of the UE, wherein the first frequency domain signal is obtained from a coordinated cell of the UE and sent by the second baseband processing unit to the frequency domain exchange module; and sending (102, 304, 506, 1003), by the frequency domain exchange module, the first frequency domain signal to the first baseband processing unit of the at least two baseband processing units, so that the first baseband processing unit performs joint processing on the first frequency domain signal and the second frequency domain signal (305, 507), wherein, as the joint processing, the first baseband processing unit performs Multiple Input Multiple Output decoding processing and equalization processing on the first frequency domain signal and the second frequency domain signal, and then preforms processing comprising Inverse Discrete Fourier Transform, demodulation, de-interleaving, Hybrid Automatic Repeat Request combination, decoding, or Cyclic Redundancy Check; wherein a sending route of the frequency domain exchange module for the sending of the first frequency domain signal to the first baseband processing unit is configured by the base station controller according to a Coordinated Multi-point Transmission/Reception, CoMP, coordination relationship, wherein the CoMP coordination relationship is a signal sending relationship in which the first frequency domain signal of the UE is sent to the first frequency domain exchange chip in the baseband board where the first baseband processing unit is located. receiving (101, 303, 505, 803), by the at least one second frequency domain exchange chip other than the first frequency domain exchange chip of the frequency domain exchange module, the first frequency domain signal of the UE, wherein the first frequency domain signal is obtained from a coordinated cell of the UE and sent by the second baseband processing unit to the frequency domain exchange module; and sending (102, 304, 506, 1003), by the frequency domain exchange module, the first frequency domain signal to the first baseband processing unit of the at least two baseband processing units, so that the first baseband processing unit performs joint processing on the first frequency domain signal and the second frequency domain signal (305, 507), wherein, as the joint processing, the first baseband processing unit performs Multiple Input Multiple Output decoding processing and equalization processing on the first frequency domain signal and the second frequency domain signal, and then preforms processing comprising Inverse Discrete Fourier Transform, demodulation, de-interleaving, Hybrid Automatic Repeat Request combination, decoding, or Cyclic Redundancy Check; wherein a sending route of the frequency domain exchange module for the sending of the first frequency domain signal to the first baseband processing unit is configured by the base station controller according to a Coordinated Multi-point Transmission/Reception, CoMP, coordination relationship, wherein the CoMP coordination relationship is a signal sending relationship in which the first frequency domain signal of the UE is sent to the first frequency domain exchange chip in the baseband board where the first baseband processing unit is located.