Huawei Technologies Co., Limited

Yanzhao Pang

Qian Wang

Jun Li

Xianfeng Li

Huaping Shi

Hua Cai

Song Ping Chen

Hai Li

Wei Wang

Xiaodong Li

Wei Xue

Sergio Bianchi

Song Chen

Christian Mazzucco

XianFeng Li

Tengteng Ji

Junpeng Wang

Changliang Li

A digital pre distortion (DPD) calibration coefficient control method and apparatus are applied to a microwave communications device that includes an analog device and a digital device, and can ensure a DPD calibration effect, where the method includes determining, by interpolation and according to DPD calibration coefficients corresponding to at least 2typical working states of the analog device obtained in advance, a specified DPD calibration coefficient corresponding to a specified working state of the analog device, where N is a quantity of parameters representing a working state of the analog device, and controlling a DPD calibration coefficient according to the determined specified DPD calibration coefficient corresponding to the specified working state of the analog device.

Digital pre-distortion calibration coefficient control method and apparatus

A receiving device and signal processing method, the method including monitoring quality parameters of N received signals in real time, wherein the N received signals are obtained by N receive antennas from a same transmit antenna, predicting, according to the quality parameters, whether quality of a first combined signal that is obtained after combination processing is performed on the N received signals is superior to quality of a received signal whose quality is optimal in the N received signals, determining the first combined signal as a to-be-processed signal in response to predicting that the quality of the first combined signal is superior to the quality of the received signal, and determining a to-be-processed signal according to M received signals of the N received signals in response to predicting that the quality of the first combined signal is inferior to the quality of the received signal.

Receiving device and received signal processing method

The present invention relates to the field of communications technologies and discloses a data processing method and apparatus to obtain a DPD non-linear distortion compensation coefficient under a QPSK mode. The embodiments of the present invention receive a first data flow, and perform interpolation into the first data flow to obtain a second data flow; receive a third data flow, and calculate a data flow signal quality difference between the third data flow and the second data flow; and obtain a DPD non-linear distortion compensation coefficient according to the data flow signal quality difference and the third data flow or the second data flow. The embodiments of the present invention are applicable to the scenarios of obtaining a DPD non-linear distortion compensation coefficient in QPSK mode.

Data processing method and apparatus

An apparatus for signal bandwidth compensation is disclosed. The apparatus includes: a digital predistortion filtering unit, a compensation filter, a conversion unit, and a power amplifier; where the digital predistortion filtering unit receives an original signal, performs predistortion processing on the original signal; the compensation filter receives the predistortion signal, compensates for distortion caused during a process of transmitting the predistortion signal to the power amplifier, and outputs a compensated predistortion signal to the conversion unit; the conversion unit receives the compensated predistortion signal, converts the compensated predistortion signal into an analog signal, performs frequency mixing processing, and outputs a predistortion signal experiencing the frequency mixing to the power amplifier; the power amplifier receives the predistortion signal experiencing the frequency mixing, amplifies the predistortion signal experiencing the frequency mixing, and outputs an amplified signal.

Method for implementing compensation filter and apparatus for signal bandwidth compensation

Embodiments of the present invention disclose a microwave predistorted signal generating method and apparatus. A microwave receiver receives a first received signal that has undergone analog-to-digital conversion; performs channel compensation on the first received signal, to obtain a second received signal; estimates a first transmitted signal according to the second received signal, where the first transmitted signal is a transmitted signal of a microwave transmitter before digital-to-analog conversion; performs predistortion coefficient computation according to the second received signal and the first transmitted signal; performs, by using a first-order coefficient obtained through the predistortion coefficient computation, linear distortion compensation on the second received signal that is before the first transmitted signal is estimated; and sends other predistortion coefficients except for the first-order coefficient to the microwave transmitter, so that the microwave transmitter performs non-linearity predistortion on a transmitted signal.

Microwave predistorted signal generating method and apparatus

An apparatus for implementing digital baseband predistortion includes a transmission channel including a digital-to-analog converter, a modulator, an amplifier and a power amplifier, and further includes a feedback channel analog part including a diode detector, a filter and an analog-to-digital converter, and a feedback channel digital part including a predistorter, a mode obtaining unit, a predistortion coefficient generator and a feedback correcting unit. The diode detector is configured to obtain an envelope of an output signal of the power amplifier. Embodiments of the present invention further provide a method for implementing digital baseband predistortion by applying the foregoing single-chip. Due to a simple structure of the diode detector, not only the number of radio frequency devices on the feedback channel is reduced, implementation complexity of hardware is lowered, power consumption is reduced, but also a feedback channel analog part may be integrated onto the single-chip.

Method and apparatus for implementing digital baseband predistortion

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Chengdu, China

Yanzhao Pang