Patent ID: 9270305
Filing Date: 2016-02-23
CPC Classification: H04B

Claim Text:
1. A multi-mode signal transmission system, wherein said system comprises: a transmitter which includes a plurality of transmission modules and transmits signals through a currently used transmission module of the plurality of transmission modules; power amplifier modules which are connected to the transmitter and are used to receive and amplify the signals; a selection device which is set between the transmitter and the power amplifier modules and selects the currently used transmission module while transmitting the signals; and a compensation device having inputs connected to the plurality of transmission modules respectively and an output coupled to an input of the power amplifier modules; wherein the compensation device performs a compensation to the transmission power output by the power amplifier modules according to the transmission module currently used; wherein the compensation device comprises: a selection module having inputs connected to the plurality of transmission modules respectively and an output coupled to the input of the power amplifier modules; the selection module selects the transmission module currently used and transmits a corresponding signal according to the selected transmission module; and a compensation module which is set between the selection module and the input of the power amplifier modules; wherein the compensation module receives the corresponding signal transmitted by the selection module and sends a control signal for compensation of transmission gain to the power amplifier modules.