Transmitter

A transmitter, comprising:

• a dual-band input circuit, a modulo circuit, a signal decomposition circuit, a modulation circuit, and a dual-band power amplifier, wherein
• the dual-band input circuit comprises a first band input end, a second band input end, and two digital pre-distortion (DPD) components connected to the first band input end and the second band input end, and is configured to output a first baseband signal input by the first band input end and a second baseband signal input by the second band input end, wherein the first baseband signal and the second baseband signal are processed by the DPD components before being output;
• the modulo circuit is configured to:
• perform modulo processing on the first baseband signal and the second baseband signal that are input, and output a corresponding first baseband signal modulus value and a corresponding second baseband signal modulus value;
• the signal decomposition circuit comprises a memory storing a lookup table, and a multiplier, and is configured to:
• receive the first baseband signal and the second baseband signal that are input by the DPD components, and the first baseband signal modulus value and the second baseband signal modulus value that are from the modulo circuit, and separately perform signal decomposition processing based on the lookup table and the multiplier to obtain multiple decomposed signals;
• and
• the modulation circuit is connected to the signal decomposition circuit, and is configured to receive the multiple decomposed signals output by the signal decomposition circuit, to perform combination processing on the multiple decomposed signals to obtain two corresponding processed signals, to modulate the two processed signals to corresponding working frequencies, and to output the two processed signals to the dual-band power amplifier.