| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in which phase distortion and amplitude distortion of a multiport amplifier lead to phase distortion and amplitude distortion of input signals of respective systems, which cannot be independently controlled.SOLUTION: A transmitter includes: a digital hybrid power synthesizer 20a for combining power of digital transmission signals of N systems; digital pre-distortion units 30 for, on the basis of signals and feedback signals of the N systems, preliminarily correcting distortion of the signals of the systems, respectively; transmission units 40 for converting the signals into analog signals to amplify power, respectively; an analog hybrid power synthesizer 21 for subjecting power of the signal to inverse synthesis to output an analog transmission signal; detection units 50 for converting the analog transmission signals into the digital transmission signals, respectively; and a detection side digital hybrid power synthesizer 20b for combining power of output signals of the detection units 50 to output feedback signals to the digital pre-distortion units 30, respectively. |
