Flatness calibration method and system

A calibration method and flatness technology, applied in the field of flatness calibration methods and systems, can solve the problems of high operating load, large workload, poor flexibility, etc.

Active Publication Date: 2018-03-09
DATANG LINKTESTER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a flatness calibration method and system to solve the problems of po

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  • Flatness calibration method and system

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Embodiment 1

[0031] refer to figure 1 , shows a flowchart of steps of a flatness calibration method in Embodiment 1 of the present invention. In this embodiment, the flatness calibration method includes:

[0032] Step 102, acquiring the linear value of the frequency domain characteristic measurement data of the radio frequency channel.

[0033] In this embodiment, the received power of the radio frequency channel may be normalized to obtain the linear value of the frequency domain characteristic measurement data of the radio frequency channel. Wherein, normalization processing may be performed with a determined central frequency point, but not limited thereto.

[0034] Step 104, according to the linear value of the measurement data of the frequency domain characteristic of the radio frequency channel, the frequency domain response of the full bandwidth is obtained by fitting.

[0035] In this embodiment, the frequency domain response of the entire bandwidth may be obtained by linear fit...

Embodiment 2

[0047] refer to figure 2 , shows a flowchart of steps of a flatness calibration method in Embodiment 2 of the present invention. In this embodiment, the flatness calibration method includes:

[0048] Step 202, acquiring the linear value of the frequency domain characteristic measurement data of the radio frequency channel.

[0049] In this embodiment, local oscillators may be fixed according to the actual bandwidth of the receiving channel, and the number of local oscillators and the number of gains for each local oscillator may be determined. When obtaining the linear value of the measurement data of the frequency domain characteristics of the radio frequency channel, multiple point data on the frequency domain of the radio frequency channel can be obtained according to the number of local oscillators, the number of gains and the number of measurement points under each gain; then, according to the The point data determines the linear value of the frequency domain character...

Embodiment 3

[0062] In combination with the foregoing embodiments, this embodiment takes the flatness calibration of the intermediate frequency band as an example to describe the flatness calibration method in detail. In this embodiment, the specific flow of the flatness calibration method can be as follows:

[0063] S31. Obtain a linear value of the frequency domain characteristic measurement data of the radio frequency channel.

[0064] In this embodiment, assuming that the design bandwidth of the receiving channel of the comprehensive testing instrument is 100 MHz, the local oscillator can be fixed first, and the flatness within the 100 MHz bandwidth can be tested to obtain a curve. Specifically, the comprehensive tester currently has 53 local oscillators. Considering that the flatness of different gains is also different, the current number of gains is 82. If all of them are tested, the test period will be longer. In order to save time, in this embodiment , Divide 82 gains into 11 gro...

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Abstract

The invention provides a flatness calibration method and system. The method comprises the following steps of acquiring a frequency domain characteristic measurement data linear value of a radio frequency channel; fitting to obtain a frequency domain response of the total bandwidth according to the frequency domain characteristic measurement data linear value of the radio frequency channel; determining a frequency domain response of a filter according to the frequency domain response of the total bandwidth; calculating a time domain coefficient of the filter according to the frequency domain response of the filter; intercepting data from the time domain coefficient of the filter according to the coefficient length of the filter, and determining the data obtained through interception as a coefficient of the filter; and configuring the filter according to the coefficient of the filter in order to carry out flatness calibration on the data acquired by an analog-digital converter. Accordingto the method and the system, the problems of poor flexibility, large workload and high running load in the existing flatness calibration scheme are solved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a flatness calibration method and system. Background technique [0002] In order to improve communication quality, flatness calibration is usually performed on the received power. At present, the commonly used flatness calibration method is as follows: Use radio frequency compensation or digital compensation to perform single-point calibration on each frequency point to improve flatness: first The flatness characteristics of the receiver are calibrated, and the frequency domain characteristics of the receiver are measured, and then the filter is designed for reverse compensation, so that the flatness of the output result is improved. [0003] However, the existing flatness calibration methods are usually only applicable to a link system with a fixed frequency band and little change in gain. This link system generally receives a single signal and the dynamic range of the fr...

Claims

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Application Information

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IPC IPC(8): H04B17/21H04B17/29
CPCH04B17/21H04B17/29
Inventor 胡嘉欣王海侠
Owner DATANG LINKTESTER TECH
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