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DPD parameter extraction method and device applied to 5G, electronic equipment and medium

A parameter extraction, 5G technology, applied in the direction of power amplifiers, etc., can solve the problems of high power consumption and cost, DPD limitations, etc., and achieve the effect of small out-of-band distortion and reduced limitations

Active Publication Date: 2021-07-13
CHENGDU TECHCAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For a 5G DPD with 160M bandwidth, the ADC in the feedback path requires a sampling rate of 900M. The power consumption and cost of the high-speed and high-precision ADC are very high, which greatly limits the DPD for broadband applications.

Method used

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  • DPD parameter extraction method and device applied to 5G, electronic equipment and medium
  • DPD parameter extraction method and device applied to 5G, electronic equipment and medium
  • DPD parameter extraction method and device applied to 5G, electronic equipment and medium

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Embodiment Construction

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the appended The figures are only for the purpose of illustration and description, and are not used to limit the protection scope of the present application. Additionally, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented in accordance with some embodiments of the application. It should be understood that the operations of the flowcharts may be performed out of order, and steps that have no logical context may be performed in reverse order or concurrently. In addition, those skilled in the art may add one or more other operations t...

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Abstract

The invention provides a DPD parameter extraction method and device applied to 5G, electronic equipment and a medium. The method comprises the following steps: inputting a received 5G NR signal into a DPD model to obtain a pre-distortion signal; inputting the pre-distortion signal into a power amplifier model to obtain a power amplifier PA signal with a complete frequency spectrum; performing band-limited filtering and low-speed sampling on the PA signal to obtain a band-limited frequency spectrum in a truncation interval corresponding to the limited frequency in the complete frequency spectrum; based on a mapping operator, an in-band signal corresponding to the band-limited frequency spectrum, a data matrix formed by a primary function of a power amplifier model and a vector of a 5G NR signal, and a PA signal, determining a frequency spectrum extrapolation signal having an approximately complete frequency spectrum; and iterating the DPD parameters in the DPD model according to an iterative formula [beta]t+1 = [beta]t-[mu](XHX)-1XH(y'-x) until convergence. According to the invention, under the condition that the sampling frequency of the PA signal is relatively low, the DPD parameter after iteration convergence is used, and the same DPD effect under the condition of a high sampling rate can be achieved, so that the equipment cost and the operation fund are greatly reduced.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular, relates to a method, device, electronic device and medium for extracting DPD parameters applied to 5G. Background technique [0002] In order to obtain greater output signal power, a power amplifier (PA, power amplifier) ​​generally works in an operating range close to the saturation point, so that the non-linear region of the power amplifier will cause a problem of signal distortion. [0003] Digital Pre-Distortion (DPD, Digital Pre-Distortion) is one of the most basic building blocks in current wireless communication systems. By pre-distorting the signal and the opposite direction of the RF power amplifier, it is used to hedge the power amplifier when it operates in its nonlinear region. signal distortion. [0004] The traditional DPD parameter extraction algorithm relies on the sampling rate not lower than 5 times the bandwidth of the original signa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20
CPCH03F3/20
Inventor 尹宇芳
Owner CHENGDU TECHCAL UNIV