公开(公告)号：US20180367171A1

公开(公告)日：2018-12-20

申请号：US16003623

申请日：2018-06-08

Applicant: STMicroelectronics (Alps) SAS

Inventor： Herve JACOB

IPC: H04B1/04

CPC classification number: H04B1/04 ,  H03F1/223 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/245 ,  H03F3/45376 ,  H03F2200/204 ,  H03F2200/207 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/555 ,  H03F2203/45394 ,  H03F2203/45544 ,  H03F2203/45548 ,  H03F2203/45594 ,  H03F2203/45604 ,  H04B2001/0425

Abstract: A transmission chain receives an incident signal to be transmitted having a first power and a first bandwidth. A first modulator frequency shifts a first signal derived from the incident signal to generate a first shifted signal at a modulation output. A power amplifier coupled to the modulation output amplifies an intermediate signal to generate an amplified output signal. A predistortion-signal-generating circuit generates, from the incident signal and from the amplified output signal in a second bandwidth that is larger than the first bandwidth, a predistortion signal having a second power lower than the first power. A second modulator frequency shifts a second signal derived from the predistortion signal to generate a second shifted signal for combination with the first shifted signal at said modulation output to produce the intermediate signal.