US 2014/0233676 A1 · CONTROL METHOD AND EQUIPMENT FOR RADIO-FREQUENCY SIGNAL

Abstract

The present invention describes a RF signal control method and device that changes the gain attenuation in real time and uses the changed gain attenuation to adjust the RF input signal. The RF signal control method and device also uses determined linear filter parameters for linearity improvement on the digital signal that results from a down-conversion and analog-to-digital converter on the RF input signal. The adjusted and improved signal is output after a digital pre-distortion and power amplification operation. In comparison with existing technologies, the adjusted gain attenuation is used to make adjustment on the RF input signal and improve linearity the RF input signal such that the resulting RF signal has better quality. Thus, the current application improves the linearity effect of a digital pre-distorter and the dynamic effect of a power amplifier for the RF signal, thereby enhancing coverage of the RF output signal.

Claims25

Dependent claims

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

identifying a parameter information of an input RF signal, wherein said parameter information is used to characterize an input power value of the input RF signal;
determining the input power value corresponding to the parameter information of the input RF signal according to a mapping relationship between the input RF signal parameter information and the input power value;
adjusting a current gain attenuation value when the input power value is lower than a rating power value;
adjusting and outputting the input RF signal using an adjusted gain attenuation value.

1 more element

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

determining a first center frequency and a bandwidth of a digital signal that is generated through a down-conversion and analog-to-digital (A/D) conversion on an input RF signal;
determining a second center frequency of a working band required by a power amplifier according to a start frequency and a stop frequency of the power amplifier;
using a difference between the first and second center frequencies and the bandwidth of the digital signal as parameters to implement a linear filter on a plurality of digital signals, and
generating outputs through digital pre-distortion and power amplifier operations.

1 more element

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

an RF power detector configured to identify a parameter information of an input RF signal, wherein said parameter information is used to characterize an input power value of the input RF signal;
an adaptation controller configured to determine the input power value corresponding to the parameter information of the input RF input signal as determined by the RF power detector according to a mapping relationship between the input RF signal parameter information and the input power value, wherein the adaptation controller is further configured to adjust a current gain attenuation value when it decides that the input power value is below a rating power value and send an adjusted gain attenuation value to a gain adjuster;
the gain adjuster is configured to adjust the input RF signal using the adjusted gain attenuation value and output the input RF input signal.

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

an adaptation controller configured to:
determine a first center frequency and a bandwidth of a digital signal that is generated through a down-conversion and analog-to-digital (A/D) conversion of an input RF signal, and
determine a second center frequency of a working band required by a power amplifier according to a start frequency and a stop frequency of 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 determined by the adaptation controller, as parameters of to implement the linear filter on at least one of the digital signals generated from the down-conversion and A/D conversion on the input RF signal;
a digital pre-distorter configured to use a digital pre-distortion operation on the digital signals after the adjustment of by the linear filter;
an RF power amplifier configured to use power amplification after the pre-distortion operation and output the resulting signal.

3 more elements

Dependencies are inferred from the claim text.

Control method and equipment for radio-frequency signal

Life of this patent

Control method and equipment for radio-frequency signal

Life of this patent

Abstract

Claims25