Signal processing device, multi-input power amplification system and related method

Abstract

The application provides a signal processing device, a multi-input power amplification system and a related method. The signal processing device includes a digital signal processing module, a digital-to-analog conversion module and a nonlinear processing module. The digital signal processing module is used for obtaining M channels of digital signals according to baseband signals, wherein the amplitude curve corresponding to each channel of digital signals does not have either top-shaving distortion or bottom-shaving distortion. The digital-to-analog conversion module is used for carrying out digital-to-analog conversion on the M channels of digital signals to obtain M channels of analog signals. The nonlinear processing module is used for processing the M channels of analog signals nonlinearly to obtain M channels of input signals of a multi-input power amplifier, wherein the amplitude curve of each of the M channels of input signals has bottom-shaving distortion and / or top-shaving distortion, and the amplitude curve corresponding to all the M channels of input signals does not have either top-shaving distortion or bottom-shaving distortion. The efficiency of power amplification can be improved. In addition, the system cost and power consumption can be reduced because there is no large spectrum expansion in the digital processing stage.

Description

technical field [0001] The present application relates to the field of signal processing, in particular to a signal processing device, a multi-input power amplification system and related methods. Background technique [0002] The power amplifier is one of the key components in modern wireless communication systems. It is located at the end of the entire system chain and is usually the largest energy-consuming component in the system. The performance of the power amplifier will greatly affect the efficiency of the entire system. [0003] The amplification principle of the power amplifier is mainly to convert the DC power of the power supply into an AC signal power output. During the amplification process of the power amplifier, a part of the DC signal is converted into an AC signal as an output signal and output through the impedance. The power carried by this part of the signal is useful power output, and the other part of the power is due to the DC passing through the elec...

AI Technical Summary

Problems solved by technology

[0005] Modern wireless communication systems usually use amplitude modulation, which will cause the transmitted signal to have a peak-to-average ratio characteristic, that is, the envelope of the signal changes with time, resulting in a large difference between the instantaneous maximum power and the average power of the transmitted signal

In this scenario, the power amplifier needs to work at the average power level, and must also ensure that it can output the instantaneous maximum power, which means that the power amplifier works in the fallback area of ​​the maximum output power, which leads to low efficiency of the power amplifier

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