Radio frequency power amplification system, radio frequency power amplification method, transmitter, and base station

A radio frequency power amplification method, comprising:

• processing a baseband digital signal, to obtain an original radio frequency signal;
• processing the original radio frequency signal, to obtain N processed radio frequency signals, wherein N is greater than or equal to 2;
• performing power amplification on each of the N processed radio frequency signals, to obtain N amplified radio frequency signals;
• combining the N amplified radio frequency signals;
• wherein the processing of the original radio frequency signal to obtain the N processed radio frequency signals comprises:
• decomposing the original radio frequency signal, to obtain a first signal component and a second signal component, and
• obtaining an nth processed radio frequency signal of the N processed radio frequency signals based on a formula RFn=kn1×s1+kn2×s2, wherein n=1, 2 . . . or N, RFn is the nth processed radio frequency signal, s1 is the first signal component, s2 is the second signal component, and kn1 and kn2 are amplitude and phase adjustment coefficients that correspond to the nth processed radio frequency signal at a current moment;
• determining the amplitude and phase adjustment coefficients that correspond to the nth processed radio frequency signal at the current moment;
• and
• determining, based on a preset nth correspondence between an envelope of the baseband digital signal and an amplitude and phase adjustment coefficient that an amplitude and phase adjustment coefficient that corresponds to the envelope of the baseband digital signal at the current moment is the amplitude and phase adjustment coefficient that corresponds to the nth processed radio frequency signal at the current moment.

A transmitter, comprising:

• a radio frequency power amplification apparatus, comprising:
• a radio frequency signal generation circuit, configured to process a baseband digital signal, to obtain an original radio frequency signal;
• a radio frequency signal processing circuit, configured to:
• process the original radio frequency signal, to obtain N processed radio frequency signals, wherein N is greater than or equal to 2,
• wherein the radio frequency signal processing circuit is further configured to:
• decompose the original radio frequency signal, to obtain a first signal component and a second signal component,
• obtain an nth processed radio frequency signal of the N processed radio frequency signals based on a formula RFn=kn1×s1+kn2×s2, wherein n=1, 2 . . . or N, RFn is the nth processed radio frequency signal, s1 is the first signal component, s2 is the second signal component, and kn1 and kn2 are amplitude and phase adjustment coefficients that correspond to the nth processed radio frequency signal at a current moment,
• determine the amplitude and phase adjustment coefficients that correspond to the nth processed radio frequency signal at the current moment, and
• determine, based on a preset n correspondence between an envelope of the baseband digital signal and an amplitude and phase adjustment coefficient, that an amplitude and phase adjustment coefficient that corresponds to the envelope of the baseband digital signal at the current moment is the amplitude and phase adjustment coefficient that corresponds to the nth processed radio frequency signal at the current moment;
• a power amplifier, configured to perform power amplification on each of the N processed radio frequency signals, to obtain N amplified radio frequency signals;
• and
• a combiner, configured to combine the N amplified radio frequency signals.