Apparatus and method for implementing predistortion treatment of baseband signal

A digital predistortion and baseband signal technology, applied in the field of communication, can solve the problems of inaccurate selection of predistortion coefficients and reduce signal transmission efficiency, and achieve the effect of eliminating delay processing and improving efficiency

Inactive Publication Date: 2009-01-28
TD TECH COMM TECH LTD
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Problems solved by technology

[0017] In the above-mentioned device, since the predistortion coefficient is searched according to the instantaneous and short-term power statistics of the baseband digital signal from the digital modulation unit, on the one hand, it takes a lot of time to perform calculations such as power statistics, resulting in the need for digital modulation. The baseband digital signal of the unit is delayed, which red

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  • Apparatus and method for implementing predistortion treatment of baseband signal
  • Apparatus and method for implementing predistortion treatment of baseband signal
  • Apparatus and method for implementing predistortion treatment of baseband signal

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Embodiment Construction

[0066] In order to improve the efficiency of data transmission, the present invention can make full use of the time difference of the digital modulation unit processing the received baseband digital signal of the current time slot to complete the selection of the predistortion coefficient, thereby avoiding waiting for the digital modulation unit to check the received current The time delay caused when the baseband digital signal of the time slot is processed and then the predistortion coefficient is selected to improve the data transmission efficiency.

[0067] Further, in the present invention, the processing is performed in units of time slots, so as to avoid the problem of inaccurate selection of predistortion coefficients caused by sudden power changes between time slots.

[0068] Therefore, the DPD processing unit in the present invention can be: save and update the predistortion coefficient table, obtain the average amplitude of the baseband digital signal of each carrier of...

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Abstract

The invention discloses a device for digital predistortion (DPD) processing of baseband signals, comprising at least one baseband carrier unit, a reverse training unit and a DPD processing unit, wherein the DPD processing unit is used for storing and updating a predistortion coefficient table, acquiring the mean amplitude of digital baseband signals of various carriers of the current time slot, calculating and obtaining the mean DPD input amplitude of the current time slot according to the mean amplitude of the digital baseband signals of the various carriers of the current time slot, selecting a corresponding predistortion coefficient from the predistortion coefficient table according to the mean DPD input amplitude of the current time slot to perform predistoriton processing on the digital baseband signals of the current time slot, and then generating output of the digital predistortion baseband signals. Moreover, the invention also discloses a method for digital distortion processing of the baseband signals. The proposal in the device can improve the efficiency of data transmission.

Description

Technical field [0001] The present invention relates to signal processing technology in the communication field, and in particular to a device and method for performing digital predistortion processing on baseband signals. Background technique [0002] Digital predistortion (DPD) technology is widely used to improve the efficiency of power amplifiers. According to the non-linear characteristics (amplitude and phase distortion) of the power amplifier, reverse predistortion processing is performed on the signal input to the power amplifier, that is, the use of The predistortion coefficient calculated by the linear characteristic performs predistortion processing on the input signal, and inputs the predistorted signal to the power amplifier to combine the two nonlinear distortion functions to obtain a highly linear, distortion-free amplified output signal. [0003] The transmission link of the communication system usually includes a power amplifier, which is used to power amplify th...

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Application Information

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IPC IPC(8): H04L25/49
Inventor 熊兵朱卉卢山陶焕磊
Owner TD TECH COMM TECH LTD
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