| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a radio transmission device that implements a small circuit scale while ensuring distortion compensation readiness. <P>SOLUTION: A radio transmission device having a plurality of systems of amplifiers, a plurality of systems of distortion compensation circuits and a plurality of systems of modulation circuits includes: a shared circuit for converting output signals of the amplifiers corresponding to a plurality of systems of transmission data, respectively, to intermediate frequency signals of different frequencies and multiplexing them to output a digital multiplex signal; a demodulation circuit for demodulating the digital multiplex signal output from the shared circuit to produce multiplex data; and a plurality of systems of filter circuits for extracting a plurality of systems of feedback transmission data from the multiplex data, respectively. Inverse characteristics in the systems of distortion compensation circuits are updated in accordance with errors between the systems of transmission data and the systems of feedback transmission data, respectively. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
