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Online calibration method for radio frequency front-end receiving-transmitting link

A radio frequency front-end and calibration method technology, applied in the field of radio frequency front-end, can solve problems such as inability to perform online calibration, cumbersome calibration process, and affecting equipment use efficiency

Active Publication Date: 2015-02-04
VI SERVICE NETWORK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the cumbersome calibration process, online calibration cannot be performed, which will affect the use efficiency of the equipment

Method used

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  • Online calibration method for radio frequency front-end receiving-transmitting link
  • Online calibration method for radio frequency front-end receiving-transmitting link
  • Online calibration method for radio frequency front-end receiving-transmitting link

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] The single-pole multi-throw switch 1 in the system uses PE42440 to select the channel of the input signal;

[0100] The input directional coupler 2 and the output directional coupler 9 use SYD-20-33+; when the switch is selected instead of the directional coupler, the switch PE42552 can be selected;

[0101] The input-end programmable gain module 3 and the output-end programmable gain module 10 use a combination of PE4309 and NBB-400;

[0102] The input frequency mixing module 4 uses ADL5387 to realize down-conversion;

[0103] Signal processing unit 5 uses NI PXIe-7965R and NI 5781 to generate and receive two signals;

[0104] The internal calibration source 6 uses ZY2000, which cooperates with the internal local oscillator to generate calibration signals;

[0105] The RF switch array 7 is built using two pieces of PE42552;

[0106] Power meter 8 uses ZX47-55+ to realize broadband power detection;

[0107] ADL5386 can be selected as the output mixing module 11 to r...

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Abstract

The invention relates to an online calibration method for a radio frequency front-end receiving-transmitting link, including radio frequency signal receiving calibration and radio frequency signal transmitting calibration. The radio frequency signal receiving calibration comprises the following steps: calibration setting is initialized; an internal calibration source enters a directional coupler at an input end and obtains a power meter reading of a receiving link; and signal power of a signal processing unit is compared with a power meter measurement result to obtain a power calibration factor. The calibrated radio frequency input signals can be measured by switching a single-pole multi-throw switch to a radio frequency input path, testing the calibrated frequency band and compensating corresponding calibration parameters. The radio frequency signal transmitting calibration comprises the steps of generating transmission baseband signals, calibrating I, Q imbalance of a transmitting link, calibrating output power, and compensating calibration parameters. In the module designed by the invention, radio frequency signal transmitting and receiving can be calibrated in real time without need for external equipment. The calibration of a portion of devices can be omitted in the production process of modules and time for module production can be shortened.

Description

technical field [0001] The invention belongs to the technical field of radio frequency front ends, and in particular relates to an online calibration method for radio frequency front end transceiver links. Background technique [0002] As the front-end part of the RF module, the RF front-end circuit has a significant impact on the various indicators of the RF module. Due to the wide variety of devices used in the RF module, a lot of calibration and testing work is required during production to ensure that the parameters of the module are within a certain tolerance range. [0003] Existing calibration requires the equipment to be taken to a metrology laboratory and calibrated with other equipment. Due to the cumbersome calibration process, online calibration cannot be performed, which will affect the efficiency of equipment use. [0004] The purpose of the present invention is to propose a simplified radio frequency front-end online calibration method, which can significant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/06H04B1/40
Inventor 陆奚峰俞一鸣赵延波徐驰邵晖
Owner VI SERVICE NETWORK
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