Outphase power amplification transmitter based on phase controllers

Abstract

The invention relates to an outphase power amplification transmitter based on phase controllers. The transmitter comprises a complex signal controller, a local oscillation generator, digital to analog converters, two analog RF devices and the two phase controllers, wherein the local oscillation generator generates original local carrier waves; the digital to analog converters are connected with the complex signal controller, and convert baseband signals into analog signals; each analog RF device is connected with one digital to analog converter and the local oscillation generator, and modulates analog signals to the local carrier waves; both the phase controllers are connected with the local oscillation generator, and adjust the original local waves to two outphase local carrier waves; and the output ends of the analog RF devices are connected to each other, the first input ends of the analog RF devices are connected to the analog to digital converters respectively, the second input ends of the analog RF devices are connected to the phase controllers respectively, and thus, the analog signals are modulated to two local carrier waves respectively. Compared with the prior art, the development difficulty is reduced, and the link cost is reduced.

Description

technical field [0001] The invention relates to an outphase power amplifier transmitter, in particular to an outphase power amplifier transmitter based on a phase controller. Background technique [0002] In the subway communication system, the transmitter occupies a high proportion of the power consumption of the system, so the system often needs to be placed in an air-conditioned room, or special measures such as air-cooling or water-cooling the system, and the energy consumption caused by power consumption produces high energy consumption. The cost and the requirements of green and environmental protection equipment put forward high efficiency requirements for our transmission link. At the same time, in order to meet the needs of communication, the linearity index of the transmitter cannot be changed. When the designer focuses on how to improve the efficiency of the transmitter, he proposes the outphase amplifier architecture. [0003] In the existing outphase power ampl...

AI Technical Summary

Problems solved by technology

like figure 1 Shown is a dual-converter outphase power amplifier architecture, which uses digital processing to split the signals to form a specific phase relationship between the two signals. However, the dual-converter outphase power amplifier architecture requires two sets of converters and analog RF , more importantly, the complex signal controller needs to generate two sets of different baseband signals, so the design of the baseband needs to be customized, it cannot be compatible with the general baseband, the cost is high, and the difficulty of integrated design is increased, such as figure 2 Shown is a power amplifier architecture based on a phase controller outphase, which uses digital processing to split signals to form a specific phase relationship between two signals. However, because vector control needs to control phase and amplitude at the same time, the control is difficult

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