Power calibration control method and device

Abstract

The invention provides a power calibration control method and device, wherein the method includes the following steps: adjusting a digital domain gain to realize power balance among digital domain baseband carriers and enable the power of the baseband combined wave to achieve a designated value; calculating the variation, by which the analog domain gain needs to be adjusted, when the total power of an antenna port achieves a preset value; controlling the digital domain gain to be wholly lowered by the variation; controlling the analog domain gain to be increased by the variation; and gradually increasing the digital domain gain until the total power of the antenna port achieves the preset value. Since the digital domain is not in a Digital Predistortion (DPD) loop, the adjustment of the digital domain gain would neither influence the DPD loop gain, nor have any negative effects on the operation of the DPD; and thus, by using the power calibration control method and device, it can be realized that there is no interference in a system during the whole period from starting to shutting down.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a power calibration control method and device. Background technique [0002] In modern wireless communication systems, due to the very limited spectrum resources, how to suppress the power leakage of the transmitted signal to adjacent channels caused by the nonlinear distortion of the base station transmitter, so as to avoid adjacent channel interference and improve the spectrum utilization rate, is a key issue in the current base station communication system. one of the key technologies. In Code Division Multiple Access (CDMA) communication systems, CDMA is a wideband modulated signal that not only has very tight spectral components, but also has very high spikes (called crest factor), which due to nonlinear distortion, come from The intermodulation products of the signal's own spectral components tend to fall around the CDMA spectrum, thus falling into th...

AI Technical Summary

Problems solved by technology

However, due to the impact of the transmit link gain adjustment on the closed-loop pre-distortion system during the power calibration process, the power calibration process of the existing system is often placed before the pre-distortion function is turned on, then after the power calibration process is completed and the pre-distortion function is fully operational Previously, when the transmitted signal of the base station transmitter was not pre-distorted or the pre-distortion function was activated, very serious intermodulation products would be generated, which would cause serious interference to adjacent channel signals

Although this kind of interference will be eliminated after the pre-distortion function is turned on, for communication frequency bands involving national security such as military and civil aviation, or when radio control is relatively strict, this short-term burst of serious interference is not allowed of

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