RADIO COMMUNICATION DEVICE HAVING NONLINEAR AMPLIFIER, AND DISTORTION REDUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To reduce a distortion caused in an amplifier of a radio communication device without using complicated techniques.SOLUTION: A distortion reduction circuit provided includes: a first local signal source 1001 for outputting a first local signal of a first local frequency f; a second local signal source 1007 for outputting a second local signal of a second local frequency f; a signal combiner 1005 for adding up the first local signal and the second local signal; a mixer 1002 for up-converting a transmission input signal of a frequency fwith an output signal of the signal combiner 1005; and an amplifier 1003 for amplifying an output signal of the mixer 1002. The second local frequency fis set to 2f±for 2f±3f.