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Sample validity determination method and apparatus for digital predistortion apparatus

A technology of digital predistortion and discrimination method, which is applied to amplitude adaptive predistortion, components of amplification devices, measuring devices, etc., can solve problems such as inability to obtain predistortion coefficients, increase in hardware load, increase in cost, etc. Reduced, reduced complexity, improved reliability

Active Publication Date: 2017-12-01
KMW INC +1
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Problems solved by technology

However, the more a large number of samples are collected, the more large-capacity memory is required to store them, and the load on the hardware increases and the cost also increases.
[0007] Even if a sufficient number of samples are collected with a large-capacity memory, if inappropriate samples are included, the error in finding the predistortion characteristic increases, and the correct predistortion coefficient cannot be obtained
For example, when it is a Time Division Duplex (TDD: TimeDivision Duplex) signal, there is a danger that even samples without a signal are included

Method used

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  • Sample validity determination method and apparatus for digital predistortion apparatus
  • Sample validity determination method and apparatus for digital predistortion apparatus
  • Sample validity determination method and apparatus for digital predistortion apparatus

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Embodiment Construction

[0029] Hereinafter, this embodiment will be described in detail with reference to the drawings. It should be noted that, in assigning reference numerals to constituent elements in each drawing, the same constituent elements are given the same reference numerals as much as possible even if they are shown in different drawings. In addition, in describing the present invention, when it is judged that the detailed description of related known structures or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0030] In addition, terms such as first, second, A, B, (a), and (b) may be used to describe the method of the constituent elements of the present invention. Such terms are used only to distinguish the constituent elements from other constituent elements, and the nature or sequence or sequence of the corresponding constituent elements are not limited by the terms. Throughout the specification, when it is said that a certain part ...

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Abstract

A sample validity determination method and apparatus for a digital predistortion apparatus are disclosed for determining the vvalidity of utilized samples during estimation of a predistorsion coefficient by the digital predistorsion apparatus used for compensating the non-linearity of a power amplifier. The method includes: a step of obtaining a certain quantity (represented by N, N is a natural number) of input samples from input signals input to the power amplifier; a step ofclassifying the input samples into a plurality of groups according to sizes and determining the validity of the input samples according to the distribution of the classified input samples; and a step of determining the valid input samples as samples to be input to a predistorsion algorithm for estimating the predistorsion coefficient when the input samples are valid. According to the sample validity determination method and apparatus for a digital predistortion apparatus, the non-linearity of a power amplifier is compensated, and the non-linearity of the power amplifier can be efficiently compensated by accurately estimating the predistortion coefficient even with a low-capacity memory.

Description

technical field [0001] Embodiments of the present invention relate to a device and method capable of judging whether samples stored in a memory are effective samples required for stably estimating digital pre-distortion coefficients in a digital pre-distortion device for compensating nonlinearity of a power amplifier. Background technique [0002] The contents described in this section merely provide background information of the embodiments of the present invention and do not constitute prior art. [0003] In a communication system, a power amplifier is an essential component for transmitting signals. In general, power amplifiers cannot be driven in a saturated region where nonlinear characteristics show a lot in consideration of signal quality and adjacent frequency band interference, and are driven at low power that operates with linear characteristics. However, if the power amplifier is driven with a power lower than the saturation power, there is a problem of low effic...

Claims

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Application Information

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IPC IPC(8): H04B1/04H04B17/13H03F1/32
CPCH03F1/3241H04B1/04H04B2001/0408H04B17/13H03F1/3247H03F3/189H03F3/24H03F2200/111H03F2200/321H03F2200/451H03F2200/471H03F2201/3206H03F2201/3227G01R23/20G01R31/2839G01R31/2846G01R31/2849G01R31/31708
Inventor 郑培墨允敏先丁义林李珖杓吉幸福赵盛美
Owner KMW INC
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