| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain the effect of distortion compensation required to a terminal to near maximum power of a power amplifier with simple configuration and with low power consumption. <P>SOLUTION: When compensating for non-linear distortion of a power amplifier in a wireless transmission section, baseband signals I<SB>2</SB>, Q<SB>2</SB>corresponding to a second higher harmonic wave are generated from quadrature baseband signals I, Q by direct operation, and a high-frequency signal quadrature-modulating these signals I<SB>2</SB>, Q<SB>2</SB>in a double frequency of a desired wave and a high-frequency signal quadrature-modulating the quadrature baseband signals I, Q are added with an appropriate power ratio and phase difference, thereby compensating for the distortion. <P>COPYRIGHT: (C)2007,JPO&INPIT |
