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

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

Active Publication Date: 2022-03-25
CHENGDU TECH UNIV
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  • 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 high-precision ADC are very high, which greatly limits the DPD for broadband applications.

Method used

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

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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 application provides a DPD parameter extraction method, device, electronic equipment and medium applied to 5G, the method includes: inputting the received 5G NR signal into the DPD model to obtain a pre-distortion signal; inputting the pre-distortion signal into the power amplifier model The power amplifier PA signal with complete spectrum is obtained in the frequency spectrum; band-limited filtering and low-speed sampling are performed on the PA signal to obtain the band-limited spectrum in the truncation interval corresponding to the limited frequency in the complete spectrum; based on the mapping operator, the in-band signal corresponding to the band-limited spectrum, The data matrix and PA signal composed of the basis function of the power amplifier model and the vector of the 5G NR signal determine the spectrum extrapolation signal with an approximately complete spectrum; according to the iterative formula β t+1 = β t -μ(X H X) ‑1 x H (y′-x) Iterates the DPD parameters in the DPD model until convergence. In the present application, when the sampling frequency of the PA signal is low, the DPD parameters after iterative convergence can be used to achieve the same DPD effect as in the case of high sampling rate, thereby greatly reducing equipment costs and operating funds.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular, to a method, device, electronic equipment 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 signal to obta...

Claims

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Application Information

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