Method and equipment for controlling radio-frequency signal

A radio frequency (RF) signal control method, comprising:

• determining a first center frequency and a bandwidth of a digital signal that is generated by passing an input RF signal through a first down-converter and an analog-to-digital (A/D) converter;
• determining a second center frequency of a working band required by a power amplifier according to an average value of a start frequency and a stop frequency required by the power amplifier;
• using a difference between the first and second center frequencies and the bandwidth of the digital signal as parameters for performing a linear filter on the digital signal, and
• generating an output RF signal by applying digital pre-distortion and power amplifier operations on the digital signal.

A radio frequency (RF) signal control device, comprising:

• an RF power detector configured to identify a parameter information of a current output RF signal, wherein said parameter information is used to characterize the power of the current output RF signal,
• a monitor controller configured to determine an output power value corresponding to the parameter information of the current output RF signal according to a mapping relationship between the RF signal parameter information and output power value, wherein the monitor controller is further configured to increase an up-converter gain adjustment attenuation value and to decrease a first down-converter gain adjustment attenuation value when an absolute value of a difference between the output power value and a rated power value is above a pre-set value,
• a first down-converter gain adjuster configured to adjust an input RF signal by using the decreased first down-converter gain adjustment attenuation value,
• a digital pre-distorter configured to use a digital pre-distortion operation on the input RF signal after the adjustment performed by the first down-converter gain adjuster,
• an up-converter gain adjuster configured to adjust the input RF signal by using the increased up-converter gain adjustment attenuation value;
• and
• an RF power amplifier configured to use power amplification and to output an output RF signal after the gain adjustment of the up-converter gain adjuster.

A radio frequency (RF) signal control device, comprising:

• a monitor controller configured to determine a first center frequency and a bandwidth of a digital signal that is generated by passing an input RF signal through a first down-converter and an analog-to-digital (A/D) converter and to determine a second center frequency of a working band required by a power amplifier according to an average value of a start frequency and a stop frequency required by the power amplifier,
• a linear filter configured to use a difference between the first and second center frequencies and the bandwidth of the digital signal as parameters to implement the linear filter on the digital signal,
• a digital pre-distorter configured to use a digital pre-distortion operation on the digital signal after an adjustment by the linear filter, and
• an RF power amplifier configured to use power amplification and to output the digital signal after the digital pre-distortion operation.