multi-band power amplifier

Abstract

The invention provides a multi-band power amplifying device, which can take into account both efficiency improvement and linearization requirements. The device also includes a first input terminal, a second input terminal, a first adjustment module, a second adjustment module, a first adder, and a second adder; the first input terminal receives a signal with a frequency band f1 and outputs it to the first digital pre-distortion module; The second input terminal receives the signal with the frequency band f2 and outputs it to the second digital pre-distortion module; the first adjustment module adjusts the first signal and outputs it to the first adder; the second adjustment module adjusts the third signal and outputs it to the second adder An adder; the first adder combines the adjusted signal of the second adjustment module with the signal output by the first adjustment module and then outputs it to the digital-to-analog converter; the second adder combines the second signal and the fourth signal and outputs it to second digital-to-analog converter. The device can improve the design performance of cross-band power amplifiers, reduce the types of power amplifiers, and reduce costs.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a multi-band power amplification device. Background technique [0002] In a wireless communication system, the power amplifier is located at the front end of the transmitter, and its main function is to amplify the signal and meet the system's requirements for the power of the transmitted signal. In order to ensure a certain modulation accuracy and not interfere with other systems, higher requirements are put forward for the linearization technology of the power amplifier. Although related technologies such as power amplifiers have always been research hotspots in the field of communication, the requirements for power amplifiers still revolve around efficiency and linearity, mainly involving various architectures and technologies of the power amplifier itself, as well as algorithms for corresponding linearization techniques, such as , Doherty technology has achieved great suc...

AI Technical Summary

Problems solved by technology

[0004] With the development of communication technology, technologies such as multi-band and ultra-wideband have put forward higher requirements for power amplifiers, resulting in additional figure 1 The amplifier architecture of the example has great difficulty in balancing efficiency and linearity

For example, attach figure 1 The example power amplifier architecture may be able to meet the efficiency and linearity requirements of signal A with frequency band f, but it is difficult to meet the efficiency and linearity requirements of signal B with frequency band f', and vice versa; A and signal B requirements, the efficiency will be very low, which brings great difficulties to the system design

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