Patent ID: 9596120
Date: 2017-03-14
CPC Classifications: H03F,H04B,H04L

Claim:
1. A signal transmission apparatus comprising: a signal generation unit that outputs a plurality of analog baseband signals such that each of the plurality of analog baseband signals corresponds to a respective band from among a plurality of bands; a signal conversion unit that converts each of the plurality of output analog baseband signals into a respective radio frequency (RF) signal of the corresponding band; and an amplification unit that collectively amplifies each converted RF signal, wherein the signal conversion unit includes an in-band distortion compensation analog circuit unit that generates, for each respective band, an in-band distortion compensation signal for compensating for in-band intermodulation distortion occurring due to frequency mixing of RF signals of the respective band, the distortion being included in each respective RF signal which is output from the amplification unit, and causes the respective generated in-band distortion compensation signal to be carried by the RF signals corresponding to the respective band, and an inter-band distortion compensation analog circuit unit that generates, for each respective pair of bands from among the plurality of bands, an inter-band distortion compensation signal for compensating for cross-modulation distortion occurring due to frequency mixing of RF signals among the plurality of bands which are input to the amplification unit, and causes the respective generated inter-band distortion compensation signal to be carried by each respective RF signal that corresponds to one of the respective pair of bands.