A wireless communication system includes: a processing circuit, at least one linear amplification circuit, a switch amplification circuit, at least one first filter capacitor, and at least one power amplifier. An output end of the switch amplification circuit, an output end of the linear amplification circuit, and a power supply end of the power amplifier are coupled at a first node. The first filter capacitor is coupled to an input end of the linear amplification circuit or the output end of the linear amplification circuit.